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askuricaskuric
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Merge pull request #394 from Copper280z/f7_current_sense
Add lowside current sensing for STM32F7 microcontrollers
2 parents af2c7c0 + 49da7b0 commit 9e3725c

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‎src/current_sense/hardware_specific/stm32/stm32f7/stm32f7_hal.cpp‎

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#include "stm32f7_hal.h"
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#if defined(STM32F7xx)
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//#define SIMPLEFOC_STM32_DEBUG
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#include "../../../../communication/SimpleFOCDebug.h"
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#define _TRGO_NOT_AVAILABLE 12345
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ADC_HandleTypeDef hadc;
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int _adc_init(Stm32CurrentSenseParams* cs_params, const STM32DriverParams* driver_params)
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{
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ADC_InjectionConfTypeDef sConfigInjected;
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// check if all pins belong to the same ADC
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ADC_TypeDef* adc_pin1 = (ADC_TypeDef*)pinmap_peripheral(analogInputToPinName(cs_params->pins[0]), PinMap_ADC);
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ADC_TypeDef* adc_pin2 = (ADC_TypeDef*)pinmap_peripheral(analogInputToPinName(cs_params->pins[1]), PinMap_ADC);
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ADC_TypeDef* adc_pin3 = _isset(cs_params->pins[2]) ? (ADC_TypeDef*)pinmap_peripheral(analogInputToPinName(cs_params->pins[2]), PinMap_ADC) : nullptr;
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if ( (adc_pin1 != adc_pin2) || ( (adc_pin3) && (adc_pin1 != adc_pin3) )){
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#ifdef SIMPLEFOC_STM32_DEBUG
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SIMPLEFOC_DEBUG("STM32-CS: ERR: Analog pins dont belong to the same ADC!");
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#endif
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return -1;
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}
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/**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
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*/
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hadc.Instance = (ADC_TypeDef *)pinmap_peripheral(analogInputToPinName(cs_params->pins[0]), PinMap_ADC);
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if(hadc.Instance == ADC1) __HAL_RCC_ADC1_CLK_ENABLE();
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#ifdef ADC2 // if defined ADC2
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else if(hadc.Instance == ADC2) __HAL_RCC_ADC2_CLK_ENABLE();
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#endif
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#ifdef ADC3 // if defined ADC3
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else if(hadc.Instance == ADC3) __HAL_RCC_ADC3_CLK_ENABLE();
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#endif
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else{
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#ifdef SIMPLEFOC_STM32_DEBUG
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SIMPLEFOC_DEBUG("STM32-CS: ERR: Pin does not belong to any ADC!");
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#endif
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return -1; // error not a valid ADC instance
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}
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#ifdef SIMPLEFOC_STM32_DEBUG
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SIMPLEFOC_DEBUG("STM32-CS: Using ADC: ", _adcToIndex(&hadc)+1);
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#endif
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hadc.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
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hadc.Init.Resolution = ADC_RESOLUTION_12B;
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hadc.Init.ScanConvMode = ENABLE;
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hadc.Init.ContinuousConvMode = DISABLE;
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hadc.Init.DiscontinuousConvMode = DISABLE;
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hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
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hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START; // for now
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hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
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hadc.Init.NbrOfConversion = 1;
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hadc.Init.DMAContinuousRequests = DISABLE;
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hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
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if ( HAL_ADC_Init(&hadc) != HAL_OK){
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#ifdef SIMPLEFOC_STM32_DEBUG
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SIMPLEFOC_DEBUG("STM32-CS: ERR: cannot init ADC!");
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#endif
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return -1;
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}
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/**Configures for the selected ADC injected channel its corresponding rank in the sequencer and its sample time
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*/
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sConfigInjected.InjectedNbrOfConversion = _isset(cs_params->pins[2]) ? 3 : 2;
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sConfigInjected.InjectedSamplingTime = ADC_SAMPLETIME_3CYCLES;
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sConfigInjected.ExternalTrigInjecConvEdge = ADC_EXTERNALTRIGINJECCONVEDGE_RISINGFALLING;
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sConfigInjected.AutoInjectedConv = DISABLE;
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sConfigInjected.InjectedDiscontinuousConvMode = DISABLE;
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sConfigInjected.InjectedOffset = 0;
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// automating TRGO flag finding - hardware specific
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uint8_t tim_num = 0;
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for (size_t i=0; i<6; i++) {
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HardwareTimer *timer_to_check = driver_params->timers[tim_num++];
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TIM_TypeDef *instance_to_check = timer_to_check->getHandle()->Instance;
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// bool TRGO_already_configured = instance_to_check->CR2 & LL_TIM_TRGO_UPDATE;
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// if(TRGO_already_configured) continue;
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uint32_t trigger_flag = _timerToInjectedTRGO(timer_to_check);
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if(trigger_flag == _TRGO_NOT_AVAILABLE) continue; // timer does not have valid trgo for injected channels
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// if the code comes here, it has found the timer available
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// timer does have trgo flag for injected channels
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sConfigInjected.ExternalTrigInjecConv = trigger_flag;
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// this will be the timer with which the ADC will sync
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cs_params->timer_handle = timer_to_check;
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if (!IS_TIM_REPETITION_COUNTER_INSTANCE(instance_to_check)) {
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// workaround for errata 2.2.1 in ES0290 Rev 7
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// https://www.st.com/resource/en/errata_sheet/es0290-stm32f74xxx-and-stm32f75xxx-device-limitations-stmicroelectronics.pdf
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__HAL_RCC_DAC_CLK_ENABLE();
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}
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// done
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break;
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}
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if( cs_params->timer_handle == NP ){
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// not possible to use these timers for low-side current sense
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#ifdef SIMPLEFOC_STM32_DEBUG
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SIMPLEFOC_DEBUG("STM32-CS: ERR: cannot sync any timer to injected channels!");
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#endif
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return -1;
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}
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// display which timer is being used
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#ifdef SIMPLEFOC_STM32_DEBUG
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// it would be better to use the getTimerNumber from driver
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SIMPLEFOC_DEBUG("STM32-CS: injected trigger for timer index: ", get_timer_index(cs_params->timer_handle->getHandle()->Instance) + 1);
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#endif
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// first channel
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sConfigInjected.InjectedRank = ADC_INJECTED_RANK_1;
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sConfigInjected.InjectedChannel = _getADCChannel(analogInputToPinName(cs_params->pins[0]));
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if (HAL_ADCEx_InjectedConfigChannel(&hadc, &sConfigInjected) != HAL_OK){
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#ifdef SIMPLEFOC_STM32_DEBUG
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SIMPLEFOC_DEBUG("STM32-CS: ERR: cannot init injected channel: ", (int)_getADCChannel(analogInputToPinName(cs_params->pins[0])) );
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#endif
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return -1;
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}
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// second channel
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sConfigInjected.InjectedRank = ADC_INJECTED_RANK_2;
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sConfigInjected.InjectedChannel = _getADCChannel(analogInputToPinName(cs_params->pins[1]));
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if (HAL_ADCEx_InjectedConfigChannel(&hadc, &sConfigInjected) != HAL_OK){
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#ifdef SIMPLEFOC_STM32_DEBUG
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SIMPLEFOC_DEBUG("STM32-CS: ERR: cannot init injected channel: ", (int)_getADCChannel(analogInputToPinName(cs_params->pins[1]))) ;
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#endif
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return -1;
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}
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// third channel - if exists
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if(_isset(cs_params->pins[2])){
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sConfigInjected.InjectedRank = ADC_INJECTED_RANK_3;
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sConfigInjected.InjectedChannel = _getADCChannel(analogInputToPinName(cs_params->pins[2]));
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if (HAL_ADCEx_InjectedConfigChannel(&hadc, &sConfigInjected) != HAL_OK){
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#ifdef SIMPLEFOC_STM32_DEBUG
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SIMPLEFOC_DEBUG("STM32-CS: ERR: cannot init injected channel: ", (int)_getADCChannel(analogInputToPinName(cs_params->pins[2]))) ;
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#endif
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return -1;
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}
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}
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#ifdef SIMPLEFOC_STM32_ADC_INTERRUPT
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// enable interrupt
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HAL_NVIC_SetPriority(ADC_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(ADC_IRQn);
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#endif
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cs_params->adc_handle = &hadc;
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return 0;
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}
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void _adc_gpio_init(Stm32CurrentSenseParams* cs_params, const int pinA, const int pinB, const int pinC)
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{
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uint8_t cnt = 0;
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if(_isset(pinA)){
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pinmap_pinout(analogInputToPinName(pinA), PinMap_ADC);
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cs_params->pins[cnt++] = pinA;
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}
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if(_isset(pinB)){
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pinmap_pinout(analogInputToPinName(pinB), PinMap_ADC);
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cs_params->pins[cnt++] = pinB;
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}
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if(_isset(pinC)){
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pinmap_pinout(analogInputToPinName(pinC), PinMap_ADC);
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cs_params->pins[cnt] = pinC;
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}
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}
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#ifdef SIMPLEFOC_STM32_ADC_INTERRUPT
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extern "C" {
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void ADC_IRQHandler(void)
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{
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HAL_ADC_IRQHandler(&hadc);
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}
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}
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#endif
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#endif

‎src/current_sense/hardware_specific/stm32/stm32f7/stm32f7_hal.h‎

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#pragma once
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#include "Arduino.h"
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#if defined(STM32F7xx)
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#include "stm32f7xx_hal.h"
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#include "../../../../common/foc_utils.h"
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#include "../../../../drivers/hardware_specific/stm32/stm32_mcu.h"
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#include "../stm32_mcu.h"
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#include "stm32f7_utils.h"
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int _adc_init(Stm32CurrentSenseParams* cs_params, const STM32DriverParams* driver_params);
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void _adc_gpio_init(Stm32CurrentSenseParams* cs_params, const int pinA, const int pinB, const int pinC);
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#endif

‎src/current_sense/hardware_specific/stm32/stm32f7/stm32f7_mcu.cpp‎

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#include "../../../hardware_api.h"
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#if defined(STM32F7xx)
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#include "../../../../common/foc_utils.h"
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#include "../../../../drivers/hardware_api.h"
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#include "../../../../drivers/hardware_specific/stm32/stm32_mcu.h"
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#include "../../../hardware_api.h"
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#include "../stm32_mcu.h"
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#include "stm32f7_hal.h"
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#include "stm32f7_utils.h"
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#include "Arduino.h"
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#define _ADC_VOLTAGE 3.3f
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#define _ADC_RESOLUTION 4096.0f
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// array of values of 4 injected channels per adc instance (3)
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uint32_t adc_val[3][4]={0};
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// does adc interrupt need a downsample - per adc (3)
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bool needs_downsample[3] = {1};
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// downsampling variable - per adc (3)
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uint8_t tim_downsample[3] = {1};
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void* _configureADCLowSide(const void* driver_params, const int pinA, const int pinB, const int pinC){
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Stm32CurrentSenseParams* cs_params= new Stm32CurrentSenseParams {
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.pins={(int)NOT_SET,(int)NOT_SET,(int)NOT_SET},
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.adc_voltage_conv = (_ADC_VOLTAGE) / (_ADC_RESOLUTION)
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};
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_adc_gpio_init(cs_params, pinA,pinB,pinC);
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if(_adc_init(cs_params, (STM32DriverParams*)driver_params) != 0) return SIMPLEFOC_CURRENT_SENSE_INIT_FAILED;
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return cs_params;
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}
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void _driverSyncLowSide(void* _driver_params, void* _cs_params){
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STM32DriverParams* driver_params = (STM32DriverParams*)_driver_params;
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Stm32CurrentSenseParams* cs_params = (Stm32CurrentSenseParams*)_cs_params;
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// if compatible timer has not been found
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if (cs_params->timer_handle == NULL) return;
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// stop all the timers for the driver
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_stopTimers(driver_params->timers, 6);
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// if timer has repetition counter - it will downsample using it
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// and it does not need the software downsample
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if( IS_TIM_REPETITION_COUNTER_INSTANCE(cs_params->timer_handle->getHandle()->Instance) ){
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// adjust the initial timer state such that the trigger
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// - for DMA transfer aligns with the pwm peaks instead of throughs.
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// - for interrupt based ADC transfer
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// - only necessary for the timers that have repetition counters
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cs_params->timer_handle->getHandle()->Instance->CR1 |= TIM_CR1_DIR;
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cs_params->timer_handle->getHandle()->Instance->CNT = cs_params->timer_handle->getHandle()->Instance->ARR;
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// remember that this timer has repetition counter - no need to downasmple
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needs_downsample[_adcToIndex(cs_params->adc_handle)] = 0;
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}
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// set the trigger output event
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LL_TIM_SetTriggerOutput(cs_params->timer_handle->getHandle()->Instance, LL_TIM_TRGO_UPDATE);
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// start the adc
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#ifdef SIMPLEFOC_STM32_ADC_INTERRUPT
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HAL_ADCEx_InjectedStart_IT(cs_params->adc_handle);
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#else
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HAL_ADCEx_InjectedStart(cs_params->adc_handle);
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#endif
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// restart all the timers of the driver
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_startTimers(driver_params->timers, 6);
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}
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// function reading an ADC value and returning the read voltage
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float _readADCVoltageLowSide(const int pin, const void* cs_params){
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for(int i=0; i < 3; i++){
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if( pin == ((Stm32CurrentSenseParams*)cs_params)->pins[i]){ // found in the buffer
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#ifdef SIMPLEFOC_STM32_ADC_INTERRUPT
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return adc_val[_adcToIndex(((Stm32CurrentSenseParams*)cs_params)->adc_handle)][i] * ((Stm32CurrentSenseParams*)cs_params)->adc_voltage_conv;
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#else
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// an optimized way to go from i to the channel i=0 -> channel 1, i=1 -> channel 2, i=2 -> channel 3
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uint32_t channel = (i == 0) ? ADC_INJECTED_RANK_1 : (i == 1) ? ADC_INJECTED_RANK_2 : ADC_INJECTED_RANK_3;
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return HAL_ADCEx_InjectedGetValue(((Stm32CurrentSenseParams*)cs_params)->adc_handle, channel) * ((Stm32CurrentSenseParams*)cs_params)->adc_voltage_conv;
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#endif
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}
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}
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return 0;
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}
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#ifdef SIMPLEFOC_STM32_ADC_INTERRUPT
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extern "C" {
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void HAL_ADCEx_InjectedConvCpltCallback(ADC_HandleTypeDef *AdcHandle){
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// calculate the instance
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int adc_index = _adcToIndex(AdcHandle);
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// if the timer han't repetition counter - downsample two times
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if( needs_downsample[adc_index] && tim_downsample[adc_index]++ > 0) {
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tim_downsample[adc_index] = 0;
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return;
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}
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adc_val[adc_index][0]=HAL_ADCEx_InjectedGetValue(AdcHandle, ADC_INJECTED_RANK_1);
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adc_val[adc_index][1]=HAL_ADCEx_InjectedGetValue(AdcHandle, ADC_INJECTED_RANK_2);
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adc_val[adc_index][2]=HAL_ADCEx_InjectedGetValue(AdcHandle, ADC_INJECTED_RANK_3);
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}
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}
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#endif
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#endif

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