FaSTTUBe/sensor-node
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Turn PWM channels on only when needed

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This commit is contained in:
Oskar Winkels
2025-05-08 15:12:54 +02:00
parent 778e0ae272
commit ffd90a6a36
3 changed files with 19 additions and 15 deletions
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1
Hardware/~sensor-node.kicad_pcb.lck Normal file
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@ -0,0 +1 @@
{"hostname":"nagata","username":"oskar"}

1
Hardware/~sensor-node.kicad_sch.lck Normal file
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@ -0,0 +1 @@
{"hostname":"nagata","username":"oskar"}

32
Software/Core/Src/main.c
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@ -27,6 +27,8 @@
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <string.h>
#include "mappings.h"
/* USER CODE END Includes */
@ -54,6 +56,8 @@ static uint8_t dio_values[NUM_DIO_PINS];
// See mappings.h pwm_tim_t
TIM_HandleTypeDef* PWM_TIM_MAP[3] = {&htim1, &htim4, &htim3};
static uint8_t pwm_ch_active[8];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
@ -157,15 +161,8 @@ int main(void)
if (HAL_FDCAN_Start(hMainCAN) != HAL_OK)
Error_Handler();
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_4);
HAL_TIM_PWM_Start(&htim4, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim4, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_4);
// Init all channels as stopped
memset(pwm_ch_active, 0, 8);
/* USER CODE END 2 */
@ -352,14 +349,19 @@ void HAL_FDCAN_RxFifo0Callback(FDCAN_HandleTypeDef *handle, uint32_t RxFifo0ITs)
for (int i = 0; i < header.DataLength; i++) {
TIM_HandleTypeDef* htim = PWM_TIM_MAP[PWM_CH_MAP[i].tim];
if ((pwm_ch_active[i] == 0) && (dcs[i] == 0)) {
HAL_TIM_PWM_Stop(htim, PWM_CH_MAP[i].ch << 2);
pwm_ch_active[i] = 0;
continue;
}
SetCCR(htim->Instance, PWM_CH_MAP[i].ch, dcs[i]);
// TODO: This does not work, apparently they don't start in RESET
// Maybe have our own init bool array instead
// Manually enabling doesn't seem to work either
if (htim->ChannelState[PWM_CH_MAP[i].ch] == HAL_TIM_CHANNEL_STATE_RESET)
if (pwm_ch_active[i] == 0) {
HAL_TIM_PWM_Start(htim, PWM_CH_MAP[i].ch << 2);
// MAYBE: Stop Timer when DC == 0 on all channels?
// HAL_TIM_PWM_Stop(htim, channel);
pwm_ch_active[i] = 1;
}
}
break;