replace header license with SPDX statement

application.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** STM32F1 application example
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  */
 

bootloader.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** USB DFU bootloader
- *  @file bootloader.c
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2019
  */
 /* standard libraries */

global.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** global definitions and methods (code)
+/** global definitions and methods
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  */
 /* standard libraries */

global.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** global definitions and methods (API)
+/** global definitions and methods
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  */
 #pragma once

lib/flash_internal.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to read/write internal flash
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: none
  */

lib/flash_internal.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to read/write internal flash
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: none
  */

lib/flash_sdcard.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communicate with an SD card flash memory using the SPI mode (code)
- *  @file flash_sdcard.c
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017
  *  @note peripherals used: SPI @ref flash_sdcard_spi
  *  @warning all calls are blocking

lib/flash_sdcard.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** library to communicate with an SD card flash memory using the SPI mode (API)
- *  @file flash_sdcard.h
+/** library to communicate with an SD card flash memory using the SPI mode
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017
  *  @note peripherals used: SPI @ref flash_sdcard_spi
  *  @warning all calls are blocking

lib/i2c_master.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communicate using I²C as master (code)
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: I2C
  */

lib/i2c_master.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** library to communicate using I²C as master (API)
+/** library to communicate using I²C as master
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: I2C
  */

lib/interrupt.c

@@ -1,19 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
 /** BusVoodoo runtime interrupt table
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018
  */
 #include "interrupt.h" // own definitions

lib/interrupt.h

@@ -1,19 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
 /** BusVoodoo runtime interrupt table
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018
  */
 #pragma once

lib/ir_nec.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to decode InfraRed NEC code
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018-2020
  *  @note peripherals used: timer channel @ref ir_nec_timer
  */

lib/ir_nec.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to decode InfraRed NEC code
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018-2020
  *  @note peripherals used: timer channel @ref ir_nec_timer
  */

lib/lcd_hd44780.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communication with Hitacho HD44780 LCD controller
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2019-2020
  *  @note peripherals used: GPIO @ref lcd_hd44780_gpio
  */

lib/lcd_hd44780.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communication with Hitacho HD44780 LCD controller
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2019-2020
  *  @note peripherals used: GPIO @ref lcd_hd44780_gpio, I²C @ref lcd_hd44780_i2c
  */

lib/led_max7219.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communicate with a Titan Micro MAX7219 IC attached to a 4-digit 7-segment (code)
- *  @file led_max7219.c
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017
  *  @note peripherals used: GPIO @ref led_max7219_gpio, timer @ref led_tm1637_timer
  *  @warning all calls are blocking

lib/led_max7219.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** library to communicate with a Maxim MAX7219 IC attached to a 8-digit 7-segment (API)
- *  @file led_max7219.h
+/** library to communicate with a Maxim MAX7219 IC attached to a 8-digit 7-segment
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017
  *  @note peripherals used: GPIO @ref led_max7219_gpio, SPI @ref led_max7219_spi
  *  @warning all calls are blocking

lib/led_tm1637.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communicate with a Titan Micro TM1637 IC attached to a 4-digit 7-segment
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: GPIO @ref led_tm1637_gpio, timer @ref led_tm1637_timer
  *  @note the protocol is very similar to I2C but incompatible for the following reasons: the capacitance is too large for open-drain type output with weak pull-up resistors (push-pull needs to be used, preventing to get ACKs since no indication of the ACK timing is provided); the devices doesn't use addresses; the STM32 I2C will switch to receiver mode when the first sent byte (the I2C address) has last bit set to 1 (such as for address commands with B7=1 where B7 is transmitted last), preventing to send further bytes (the data byte after the address)

lib/led_tm1637.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communicate with a Titan Micro TM1637 IC attached to a 4-digit 7-segment
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: GPIO @ref led_tm1637_gpio, timer @ref led_tm1637_timer
  *  @warning all calls are blocking

lib/led_ws2812b.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to drive a WS2812B LED chain
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: SPI @ref led_ws2812b_spi, DMA
  */

lib/led_ws2812b.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to drive a WS2812B LED chain
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: SPI @ref led_ws2812b_spi, DMA
  */

lib/menu.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** definitions to build menus (code)
- *  @file menu.c
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018
  */
 /* standard libraries */

lib/menu.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** definitions to build menus (API)
- *  @file menu.h
+/** definitions to build menus
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018
  */
 #pragma once

lib/microwire_master.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communicate using microwore as master
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: GPIO @ref microwire_master_gpio, timer @ref microwire_master_timer
  *  microwire is a 3-Wire half-duplex synchronous bus. It is very similar to SPI without fixed length messages (bit-wised).

lib/microwire_master.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communicate using microwore as master
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: GPIO @ref microwire_master_gpio, timer @ref microwire_master_timer
  *  microwire is a 3-Wire half-duplex synchronous bus. It is very similar to SPI without fixed length messages (bit-wised).

lib/oled_ssd1306.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** SSD1306 OLED library (code)
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018-2019
  *  @note peripherals used: I2C @ref oled_ssd1306_i2c
  */

lib/oled_ssd1306.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** SSD1306 OLED library (API)
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018-2019
  *  @note peripherals used: I2C @ref oled_ssd1306_i2c
  */

lib/onewire_master.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for 1-wire protocol as master
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: timer @ref onewire_master_timer, GPIO @ref onewire_master_gpio
  *  @note overdrive mode is not provided

lib/onewire_master.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for 1-wire protocol as master
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: timer @ref onewire_master_timer, GPIO @ref onewire_master_gpio
  *  @note overdrive mode is not provided

lib/onewire_slave.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for 1-wire protocol as master
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: GPIO and timer @ref onewire_slave_timer, GPIO @ref onewire_slave_gpio
  *  @note overdrive mode is not supported

lib/onewire_slave.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for 1-wire protocol as slave
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: timer @ref onewire_slave_timer, GPIO @ref onewire_slave_gpio
  *  @note overdrive mode is not supported

lib/print.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** printing utilities to replace the large printf from the standard library (code)
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2019
  */
 /* standard libraries */

lib/print.h

@@ -1,17 +1,3 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** printing utilities to replace the large printf from the standard library (API)
  *  @note use % as format specifier prefix, followed by + to enforce sign or 0x prefix, 0 followed by n for padding or forcing integer part of floating point number, . followed by n for number for fractional precision of floating point numbers, and format specifier
  *  format specifier supported are:
@@ -30,6 +16,7 @@
  *  - B for uint64_t bits
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2019
  */
 #pragma once

lib/radio_esp8266.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to send data using ESP8266 WiFi SoC (code)
- *  @file radio_esp8266.c
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016
  *  @note peripherals used: USART @ref radio_esp8266_usart
  */

lib/radio_esp8266.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to send data using ESP8266 WiFi SoC (API)
- *  @file radio_esp8266.h
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016
  *  @note peripherals used: USART @ref radio_esp8266_usart
  */

lib/rtc_dcf77.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to get time from a DCF77 module
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: GPIO @ref rtc_dcf77_gpio, timer @ref rtc_dcf77_timer
  */

lib/rtc_dcf77.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to get time from a DCF77 module
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: GPIO @ref rtc_dcf77_gpio, timer @ref rtc_dcf77_timer
  */

lib/rtc_ds1307.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communicate with the Maxim DS1307 I2C RTC IC (code)
- *  @file rtc_ds1307.c
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2017
  *  @note peripherals used: I²C
  */

lib/rtc_ds1307.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communicate with the Maxim DS1307 I2C RTC IC (API)
- *  @file rtc_ds1307.h
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2017
  *  @note peripherals used: I²C
  */

lib/sensor_as3935.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communication with ams AS3935 Franklin lightning sensor IC using SPI
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2019
  *  @note peripherals used: SPI @ref sensor_as3935_spi, GPIO @ref sensor_as3935_gpio
  */

lib/sensor_as3935.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to communication with ams AS3935 Franklin lightning sensor IC using SPI
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2019
  *  @note peripherals used: SPI @ref sensor_as3935_spi, GPIO @ref sensor_as3935_gpio
  */

lib/sensor_dht11.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to query measurements from Aosong DHT11 temperature and relative humidity sensor
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: timer channel @ref sensor_dht11_timer
  */

lib/sensor_dht11.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to query measurements from Aosong DHT11 temperature and relative humidity sensor
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: timer channel @ref sensor_dht11_timer (add external pull-up resistor)
  */

lib/sensor_dht22.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to query measurements from Aosong DHT22 temperature and relative humidity sensor
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: GPIO and timer @ref sensor_dht22_timer
  *  @note the DHT22 protocol is very similar but nit completely compatible with the DHT22 protocol: only 1 ms initial host pull low is required (vs. 18 ms), the data is encoded as int16_t (vs. uint8_t), and the signal has more jitter

lib/sensor_dht22.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to query measurements from Aosong DHT22 (aka. AM2302) temperature and relative humidity sensor
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  *  @note peripherals used: timer channel @ref sensor_dht22_timer (add external pull-up resistor)
  */

lib/sensor_ds18b20.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for Maxim DS18B20 digital temperature sensor (using 1-Wire protocol) (code)
- *  @file sensor_ds18b20.c
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017
  *  @note peripherals used: 1-Wire (timer @ref onewire_master_timer, GPIO @ref onewire_master_gpio)
  *  @warning this library does not support parasite power mode and alarms

lib/sensor_ds18b20.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for Maxim DS18B20 digital temperature sensor (using 1-Wire protocol) (API)
- *  @file sensor_ds18b20.h
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017
  *  @note peripherals used: 1-Wire (timer @ref onewire_master_timer, GPIO @ref onewire_master_gpio)
  *  @warning this library does not support parasite power mode and alarms

lib/sensor_pzem.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to query measurements from peacefair PZEM-004 and PZEM-004T electricity meter
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: USART @ref sensor_pzem_usart, timer @ref sensor_pzem_timer
  */

lib/sensor_pzem.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to query measurements from peacefair PZEM-004 and PZEM-004T electricity meter
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: USART @ref sensor_pzem_usart, timer @ref sensor_pzem_timer
  */

lib/sensor_sdm120.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to query measurements from eastron SDM120-ModBus electricity meter
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: USART @ref sensor_sdm120_usart , GPIO @ref sensor_sdm120_gpio , timer @ref sensor_sdm120_timer
  */

lib/sensor_sdm120.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to query measurements from eastron SDM120-ModBus electricity meter
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: USART @ref sensor_sdm120_usart , GPIO @ref sensor_sdm120_gpio , timer @ref sensor_sdm120_timer
  */

lib/terminal.c

@@ -1,21 +1,8 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** terminal prompt interface (code)
  *  @note allows line editing and supports some ANSI escape codes
- *  @file terminal.c
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018-2019
  */
 /* standard libraries */

lib/terminal.h

@@ -1,21 +1,8 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** terminal prompt interface (API)
  *  @note allows line editing and supports some ANSI escape codes
- *  @file terminal.h
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018
  */
 

lib/uart.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for UART communication
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: USART @ref uart
  */

lib/uart.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for UART communication
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: USART @ref uart
  */

lib/uart_soft.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to control up to 4 independent receive and transmit software UART ports
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: GPIO @ref uart_soft_gpio, timer @ref uart_soft_timer
  */

lib/uart_soft.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to control up to 4 independent receive and transmit software UART ports
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: GPIO @ref uart_soft_gpio, timer @ref uart_soft_timer
  */

lib/usart_enhanced.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for enhanced USART communication (code)
  *  @file usart_enhanced.c
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018
  *  @details the USART peripherals only support 8 or 9-bit word and even or odd parity (included in the data bits). The library adds support for 5 to 8-bit words, none/even/odd/mark/space parity (on top of the data bits)
  *  @note since parity is handled in software, the parity error (PE) flag is unused and should be replaced by the value return by usart_enhanced_parity_error

lib/usart_enhanced.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for enhanced USART communication (API)
- *  @file usart_enhanced.h
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2018
  *  @details the USART peripherals only support 8 or 9-bit word and even or odd parity (included in the data bits). The library adds support for 5 to 8-bit words, none/even/odd/mark/space parity (on top of the data bits)
  *  @note since parity is handled in software, the parity error (PE) flag is unused and should be replaced by the value return by usart_enhanced_parity_error

lib/usb_cdcacm.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for USB CDC ACM communication (code)
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2019
  */
 

lib/usb_cdcacm.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for USB CDC ACM communication (API)
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2019
  */
 #pragma once

lib/usb_dfu.c

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for USB DFU to write on internal flash (code)
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2020
  */
 

lib/usb_dfu.h

@@ -1,20 +1,7 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library for USB DFU to write on internal flash (API)
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2017-2019
  */
 #pragma once

lib/vfd_hv518.c

@@ -1,21 +1,8 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to drive vacuum fluorescent display using supertex HV518 shift register VFD drivers
  *  @details the current configuration is for a VFD extracted from a Samsung SER-6500 cash register
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: SPI @ref vfd_hv518_spi , GPIO @ref vfd_hv518_gpio , timer @ref vfd_hv518_timer
  */

lib/vfd_hv518.h

@@ -1,21 +1,8 @@
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
 /** library to drive vacuum fluorescent display using supertex HV518 shift register VFD drivers
  *  @details the current configuration is for a VFD extracted from a Samsung SER-6500 cash register
  *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
+ *  @copyright SPDX-License-Identifier: GPL-3.0-or-later
  *  @date 2016-2020
  *  @note peripherals used: SPI @ref vfd_hv518_spi , GPIO @ref vfd_hv518_gpio , timer @ref vfd_hv518_timer
  */