busvoodoo: add led blinking with timeout
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513bee9298
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a91161981c
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@ -16,6 +16,7 @@
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* @file busvoodoo_global.c
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* @author King Kévin <kingkevin@cuvoodoo.info>
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* @date 2018
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* @note peripherals used: time @ref busvoodoo_led_timer
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*/
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/* standard libraries */
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@ -24,10 +25,12 @@
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#include <math.h> // math utilities
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/* STM32 (including CM3) libraries */
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#include <libopencm3/cm3/nvic.h> // interrupt handler
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#include <libopencm3/stm32/gpio.h> // general purpose input output library
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#include <libopencm3/stm32/rcc.h> // real-time control clock library
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#include <libopencm3/stm32/adc.h> // ADC utilities
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#include <libopencm3/stm32/dac.h> // DAC utilities
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#include <libopencm3/stm32/timer.h> // timer utilities
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/* own libraries */
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#include "global.h" // board definitions
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@ -35,6 +38,17 @@
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#include "print.h" // print utilities
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#include "busvoodoo_global.h" // BusVoodoo definitions
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/** @defgroup busvoodoo_led_timer timer used to blink LED
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* @{
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*/
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#define BUSVOODOO_LED_TIMER 5 /**< timer peripheral */
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/** @} */
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/** blue LED status */
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volatile bool busvoodoo_global_led_blue = false;
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/** red LED status */
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volatile bool busvoodoo_global_led_red = false;
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const char* busvoodoo_io_names[13] = {"I2C_SMBA/SPI_NSS/I2S_WS", "SDIO_CMD", "USART_CTS/SPI_SCK/I2S_CK", "SDIO_D3/UART_RX", "I2C_SDA/USART_RX", "SDIO_D0", "SPI_MOSI/I2S_SD", "SDIO_CK/USART_CK", "I2C_SCL/USART_TX", "SDIO_D1", "I2S_MCK", "USART_RTS/SPI_MISO", "SDIO_D2/UART_TX"};
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const uint32_t busvoodoo_io_ports[13] = {GPIOB, GPIOD, GPIOB, GPIOC, GPIOB, GPIOC, GPIOB, GPIOC, GPIOB, GPIOC, GPIOC, GPIOB, GPIOC};
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const uint32_t busvoodoo_io_pins[13] = {GPIO12, GPIO2, GPIO13, GPIO11, GPIO11, GPIO8, GPIO15, GPIO12, GPIO10, GPIO9, GPIO6, GPIO14, GPIO10};
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@ -97,6 +111,14 @@ void busvoodoo_setup(void)
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}
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dac_set_trigger_source(DAC_CR_TSEL1_SW); // use software to trigger the voltage change
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dac_set_trigger_source(DAC_CR_TSEL2_SW); // use software to trigger the voltage change
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// enable timer for LED blinking
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rcc_periph_clock_enable(RCC_TIM(BUSVOODOO_LED_TIMER)); // enable clock for timer domain
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timer_reset(TIM(BUSVOODOO_LED_TIMER)); // reset timer configuration
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timer_set_mode(TIM(BUSVOODOO_LED_TIMER), TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP); // configure timer to up counting mode
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timer_set_prescaler(TIM(BUSVOODOO_LED_TIMER), (rcc_ahb_frequency/2000)-1); // set prescaler to have 2kHz ticks (the prescaler is not large enough for 1kHz ticks)
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timer_set_period(TIM(BUSVOODOO_LED_TIMER), 0xffff); // set period to maximum
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nvic_enable_irq(NVIC_TIM_IRQ(BUSVOODOO_LED_TIMER)); // enable interrupts for this timer
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}
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void busvoodoo_safe_state(void)
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@ -267,6 +289,60 @@ float busvoodoo_embedded_pullup(bool on)
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return busvoodoo_vreg_get(BUSVOODOO_XV_CHANNEL); // set voltage on adjustable voltage regulator to be used by the embedded pull-ups
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}
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/** update LED status according to LED flags */
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static void busvoodoo_led_update(void)
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{
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if (busvoodoo_global_led_blue && busvoodoo_global_led_red) { // both LEDs should be on
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led_blink(0.01, 0.5); // enable both LEDs (alternating at 100Hz)
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} else if (busvoodoo_global_led_blue) { // only blue LED should be on
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led_blink(0, 1); // enable only blue LED
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} else if (busvoodoo_global_led_red) { // only red LED should be on
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led_blink(0, 0); // enable only red LED
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} else { // no LED should be on
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led_off(); // disable both LEDs
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}
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}
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void busvoodoo_led_blue(uint16_t ms)
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{
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timer_disable_counter(TIM(BUSVOODOO_LED_TIMER)); // disable counter while changing LEDs to avoid coherence errors (at the cost of time precision)
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if (ms>UINT16_MAX/2) { // enforce maximum
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ms = UINT16_MAX/2;
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}
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if (0==ms) { // disable LED
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busvoodoo_global_led_blue = false; // remember we disabled the blue LED
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} else {
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busvoodoo_global_led_blue = true; // remember the blue LED should be on
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timer_set_oc_value(TIM(BUSVOODOO_LED_TIMER), TIM_OC1, timer_get_counter(TIM(BUSVOODOO_LED_TIMER))+ms*2); // use capture 1 to set LED timer
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timer_clear_flag(TIM(BUSVOODOO_LED_TIMER), TIM_SR_CC1IF); // clear flag before enabling
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timer_enable_irq(TIM(BUSVOODOO_LED_TIMER), TIM_DIER_CC1IE); // enable capture 1 for blue LED
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}
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busvoodoo_led_update(); // update LED status
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timer_enable_counter(TIM(BUSVOODOO_LED_TIMER)); // re-enable timer
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}
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void busvoodoo_led_red(uint16_t ms)
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{
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timer_disable_counter(TIM(BUSVOODOO_LED_TIMER)); // disable counter while changing LEDs to avoid coherence errors (at the cost of time precision)
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if (ms>UINT16_MAX/2) { // enforce maximum
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ms = UINT16_MAX/2;
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}
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if (0==ms) { // disable LED
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busvoodoo_global_led_red = false; // remember we disabled the blue LED
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} else {
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busvoodoo_global_led_red = true; // remember the blue LED should be on
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timer_set_oc_value(TIM(BUSVOODOO_LED_TIMER), TIM_OC2, timer_get_counter(TIM(BUSVOODOO_LED_TIMER))+ms*2); // use capture 1 to set LED timer
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timer_clear_flag(TIM(BUSVOODOO_LED_TIMER), TIM_SR_CC2IF); // clear flag before enabling
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timer_enable_irq(TIM(BUSVOODOO_LED_TIMER), TIM_DIER_CC2IE); // enable capture 2 for red LED
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}
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busvoodoo_led_update(); // update LED status
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timer_enable_counter(TIM(BUSVOODOO_LED_TIMER)); // re-enable timer
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}
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/* command handlers */
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/** switch 3V3 and 5V power rails on/off
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* @param[in] argument string: "on" to switch on, "off" to switch off, NULL to get status
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*/
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@ -399,3 +475,18 @@ const struct menu_command_t busvoodoo_global_commands[] = {
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},
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};
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/** interrupt service routine called on LED timeout */
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void TIM_ISR(BUSVOODOO_LED_TIMER)(void)
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{
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if (timer_get_flag(TIM(BUSVOODOO_LED_TIMER), TIM_SR_CC1IF)) { // blue LED timeout
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timer_clear_flag(TIM(BUSVOODOO_LED_TIMER), TIM_SR_CC1IF); // clear flag
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timer_disable_irq(TIM(BUSVOODOO_LED_TIMER), TIM_DIER_CC1IE); // disable capture 1 for blue LED
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busvoodoo_global_led_blue = false; // remember blue LED should be disabled
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busvoodoo_led_update(); // update LED status
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} else if (timer_get_flag(TIM(BUSVOODOO_LED_TIMER), TIM_SR_CC2IF)) { // red LED timeout
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timer_clear_flag(TIM(BUSVOODOO_LED_TIMER), TIM_SR_CC2IF); // clear flag
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timer_disable_irq(TIM(BUSVOODOO_LED_TIMER), TIM_DIER_CC2IE); // disable capture 2 for red LED
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busvoodoo_global_led_red = false; // remember red LED should be disabled
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busvoodoo_led_update(); // update LED status
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}
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}
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@ -16,6 +16,7 @@
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* @file busvoodoo_global.h
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* @author King Kévin <kingkevin@cuvoodoo.info>
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* @date 2018
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* @note peripherals used: time @ref busvoodoo_led_timer
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*/
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/** @defgroup busvoodoo_voltages pin to control voltage regulators and pull-ups definitions
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@ -138,3 +139,11 @@ float busvoodoo_vreg_set(uint8_t channel, float voltage);
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* @return voltage applied on pull-up resistors, or NaN if channel is invalid (or error happened)
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*/
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float busvoodoo_embedded_pullup(bool on);
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/** enable blue LED for short duration
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* @param[in] ms duration in ms (0-32768)
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*/
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void busvoodoo_led_blue(uint16_t ms);
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/** enable red LED for short duration
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* @param[in] ms duration in ms (0-32768)
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*/
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void busvoodoo_led_red(uint16_t ms);
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