40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
/* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/** library to read measurements from GM1351 sound level meter
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* @file
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* @author King Kévin <kingkevin@cuvoodoo.info>
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* @date 2020
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* @note peripherals used: GPIO @ref sensor_gm1351_gpio, SPI @ref sensor_gm1351_spi
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*/
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/** measurement displayed on meter LCD, in deci-dBa
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* @warning value is only valid if decoding is successful
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*/
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extern uint16_t sensor_gm1351_decidba;
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/** flag set when LCD data has been received */
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extern volatile bool sensor_gm1351_received_flag;
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/** initialise interface to GM1351 sound level meter */
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void sensor_gm1351_setup(void);
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/** switch power of meter
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* @warning the device will power off after 10 minutes
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*/
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void sensor_gm1351_power_toggle(void);
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/** decode LCD data to displayed number
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* @return if number has been decoded correctly
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* @warning should be done before the next LCD data is being received (e.g. right after the flag is set)
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*/
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bool sensor_gm1351_decode(void);
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