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Feat bg341 sync lost fix by askuric · Pull Request #482 · simplefoc/Arduino-FOC · GitHub

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Feat bg341 sync lost fix #482

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Merged
askuric merged 1 commit into from
Aug 23, 2025
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Feat bg341 sync lost fix #482

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27 changes: 20 additions & 7 deletions src/current_sense/hardware_specific/stm32/b_g431/b_g431_mcu.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
#include "../stm32_mcu.h"
#include "../../../../drivers/hardware_specific/stm32/stm32_mcu.h"
#include "communication/SimpleFOCDebug.h"
#include "../stm32_adc_utils.h"

#define _ADC_VOLTAGE 3.3f
#define _ADC_RESOLUTION 4096.0f
Expand All @@ -25,6 +26,16 @@ static DMA_HandleTypeDef hdma_adc2;
volatile uint16_t adcBuffer1[ADC_BUF_LEN_1] = {0}; // Buffer for store the results of the ADC conversion
volatile uint16_t adcBuffer2[ADC_BUF_LEN_2] = {0}; // Buffer for store the results of the ADC conversion


// structure containing the configuration of the adc interrupt
Stm32AdcInterruptConfig adc_interrupt_config[5] = {
{0, 0, 0}, // ADC1
{0, 0, 0}, // ADC2
{0, 0, 0}, // ADC3
{0, 0, 0}, // ADC4
{0, 0, 0} // ADC5
};

// function reading an ADC value and returning the read voltage
// As DMA is being used just return the DMA result
float _readADCVoltageLowSide(const int pin, const void* cs_params){
Expand Down Expand Up @@ -155,14 +166,16 @@ void* _driverSyncLowSide(void* _driver_params, void* _cs_params){
// stop all the timers for the driver
stm32_pause(driver_params);

// if timer has repetition counter - it will downsample using it
// and it does not need the software downsample
if( IS_TIM_REPETITION_COUNTER_INSTANCE(cs_params->timer_handle->Instance) ){
// adjust the initial timer state such that the trigger for DMA transfer aligns with the pwm peaks instead of throughs.
// only necessary for the timers that have repetition counters
cs_params->timer_handle->Instance->CR1 |= TIM_CR1_DIR;
cs_params->timer_handle->Instance->CNT = cs_params->timer_handle->Instance->ARR;
// get the index of the adc
int adc_index = _adcToIndex(cs_params->adc_handle);

bool tim_interrupt = _initTimerInterruptDownsampling(cs_params, driver_params, adc_interrupt_config[adc_index]);
if(tim_interrupt) {
// error in the timer interrupt initialization
SIMPLEFOC_DEBUG("STM32-CS: timer has no repetition counter, ADC interrupt not supported for B-G431");
return SIMPLEFOC_CURRENT_SENSE_INIT_FAILED;
}

// set the trigger output event
LL_TIM_SetTriggerOutput(cs_params->timer_handle->Instance, LL_TIM_TRGO_UPDATE);

Expand Down
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