liz/flipperzero-firmware
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IR transmit example (#180)

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* DWT-based microsecond delay

* simple ir app (work only with NEC protocol and predefined address - command)

* remove space from file name, add delay_us_init_DWT header

* float-based delay us

* init tim2 by CubeMX

* fix simple pwm functions

* simple pwm timer based ir nec protocol

* ir gui test app

Co-authored-by: aanper <mail@s3f.ru>
This commit is contained in:
DrZlo13
2020-10-23 12:39:11 +03:00
committed by GitHub
parent 7205fa7ed7
commit 37fc47a24f
14 changed files with 531 additions and 55 deletions
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firmware/targets/f2/Src/flipper_hal.c
+16 -7
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@@ -34,17 +34,22 @@ void app_gpio_init(GpioPin gpio, GpioMode mode) {
}
}
// TODO delay from timer
void delay_us(uint32_t time) {
time *= 11.8;
void delay_us_init_DWT(void) {
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
DWT->CYCCNT = 0U;
}
while(time--) {
}
void delay_us(float time) {
uint32_t start = DWT->CYCCNT;
uint32_t time_ticks = time * (SystemCoreClock / 1000000);
while((DWT->CYCCNT - start) < time_ticks) {
};
}
void pwm_set(float value, float freq, TIM_HandleTypeDef* tim, uint32_t channel) {
tim->Init.CounterMode = TIM_COUNTERMODE_UP;
tim->Init.Period = (uint32_t)((SystemCoreClock / tim->Init.Prescaler) / freq);
tim->Init.Period = (uint32_t)((SystemCoreClock / (tim->Init.Prescaler + 1)) / freq);
tim->Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
tim->Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
HAL_TIM_PWM_Init(tim);
@@ -52,9 +57,13 @@ void pwm_set(float value, float freq, TIM_HandleTypeDef* tim, uint32_t channel)
TIM_OC_InitTypeDef sConfigOC;
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = (uint16_t)(291 * value);
sConfigOC.Pulse = (uint16_t)(tim->Init.Period * value);
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_PWM_ConfigChannel(tim, &sConfigOC, channel);
HAL_TIM_PWM_Start(tim, channel);
}
void pwm_stop(TIM_HandleTypeDef* tim, uint32_t channel) {
HAL_TIM_PWM_Stop(tim, channel);
}