Hi,
I'm designing a power supply using a stm32F334R8 Nucleo board. For the application is interesting to trigger the ADC SOC at half the Ton (In order to measure average current).
I am using STM32CubeIde. I have read the reference manual and the HRTIM Cookbook, among others. So far I think I have succeeded on triggering the ADC from the HRTIM. For validating that, I'm toggling a digital output inside the ADC EOC interrupt: Top signal is the duty cycle and bottom signal is digital output. Then the toggle should be happening at the half of the positive period.
As you can see, the SOC looks to happen at the beginning of the switching period.
See ADC init:
static void MX_ADC1_Init(void)
{
/* USER CODE BEGIN ADC1_Init 0 */
/* USER CODE END ADC1_Init 0 */
ADC_MultiModeTypeDef multimode = {0};
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC1_Init 1 */
/* USER CODE END ADC1_Init 1 */
/** Common config
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONVHRTIM_TRG1;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 1;
hadc1.Init.DMAContinuousRequests = DISABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure the ADC multi-mode
*/
multimode.Mode = ADC_MODE_INDEPENDENT;
if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC1_Init 2 */
/* USER CODE END ADC1_Init 2 */
}And HRTIM init:
static void MX_HRTIM1_Init(void)
{
/* USER CODE BEGIN HRTIM1_Init 0 */
/* USER CODE END HRTIM1_Init 0 */
HRTIM_EventCfgTypeDef pEventCfg = {0};
HRTIM_ADCTriggerCfgTypeDef pADCTriggerCfg = {0};
HRTIM_TimeBaseCfgTypeDef pTimeBaseCfg = {0};
HRTIM_TimerCfgTypeDef pTimerCfg = {0};
HRTIM_CompareCfgTypeDef pCompareCfg = {0};
HRTIM_DeadTimeCfgTypeDef pDeadTimeCfg = {0};
HRTIM_OutputCfgTypeDef pOutputCfg = {0};
/* USER CODE BEGIN HRTIM1_Init 1 */
/* USER CODE END HRTIM1_Init 1 */
hhrtim1.Instance = HRTIM1;
hhrtim1.Init.HRTIMInterruptResquests = HRTIM_IT_NONE;
hhrtim1.Init.SyncOptions = HRTIM_SYNCOPTION_NONE;
if (HAL_HRTIM_Init(&hhrtim1) != HAL_OK)
{
Error_Handler();
}
if (HAL_HRTIM_EventPrescalerConfig(&hhrtim1, HRTIM_EVENTPRESCALER_DIV1) != HAL_OK)
{
Error_Handler();
}
pEventCfg.Source = HRTIM_EVENTSRC_2;
pEventCfg.Polarity = HRTIM_EVENTPOLARITY_HIGH;
pEventCfg.Sensitivity = HRTIM_EVENTSENSITIVITY_LEVEL;
pEventCfg.FastMode = HRTIM_EVENTFASTMODE_ENABLE;
if (HAL_HRTIM_EventConfig(&hhrtim1, HRTIM_EVENT_1, &pEventCfg) != HAL_OK)
{
Error_Handler();
}
pADCTriggerCfg.UpdateSource = HRTIM_ADCTRIGGERUPDATE_TIMER_A;
pADCTriggerCfg.Trigger = HRTIM_ADCTRIGGEREVENT13_TIMERA_CMP2;
if (HAL_HRTIM_ADCTriggerConfig(&hhrtim1, HRTIM_ADCTRIGGER_1, &pADCTriggerCfg) != HAL_OK)
{
Error_Handler();
}
pTimeBaseCfg.Period = 0x0280;
pTimeBaseCfg.RepetitionCounter = 0x00;
pTimeBaseCfg.PrescalerRatio = HRTIM_PRESCALERRATIO_DIV1;
pTimeBaseCfg.Mode = HRTIM_MODE_CONTINUOUS;
if (HAL_HRTIM_TimeBaseConfig(&hhrtim1, HRTIM_TIMERINDEX_TIMER_A, &pTimeBaseCfg) != HAL_OK)
{
Error_Handler();
}
pTimerCfg.InterruptRequests = HRTIM_TIM_IT_NONE;
pTimerCfg.DMARequests = HRTIM_TIM_DMA_NONE;
pTimerCfg.DMASrcAddress = 0x0000;
pTimerCfg.DMADstAddress = 0x0000;
pTimerCfg.DMASize = 0x1;
pTimerCfg.HalfModeEnable = HRTIM_HALFMODE_DISABLED;
pTimerCfg.StartOnSync = HRTIM_SYNCSTART_DISABLED;
pTimerCfg.ResetOnSync = HRTIM_SYNCRESET_DISABLED;
pTimerCfg.DACSynchro = HRTIM_DACSYNC_NONE;
pTimerCfg.PreloadEnable = HRTIM_PRELOAD_DISABLED;
pTimerCfg.UpdateGating = HRTIM_UPDATEGATING_INDEPENDENT;
pTimerCfg.BurstMode = HRTIM_TIMERBURSTMODE_MAINTAINCLOCK;
pTimerCfg.RepetitionUpdate = HRTIM_UPDATEONREPETITION_DISABLED;
pTimerCfg.PushPull = HRTIM_TIMPUSHPULLMODE_DISABLED;
pTimerCfg.FaultEnable = HRTIM_TIMFAULTENABLE_NONE;
pTimerCfg.FaultLock = HRTIM_TIMFAULTLOCK_READWRITE;
pTimerCfg.DeadTimeInsertion = HRTIM_TIMDEADTIMEINSERTION_ENABLED;
pTimerCfg.DelayedProtectionMode = HRTIM_TIMER_A_B_C_DELAYEDPROTECTION_DISABLED;
pTimerCfg.UpdateTrigger = HRTIM_TIMUPDATETRIGGER_NONE;
pTimerCfg.ResetTrigger = HRTIM_TIMRESETTRIGGER_NONE;
pTimerCfg.ResetUpdate = HRTIM_TIMUPDATEONRESET_DISABLED;
if (HAL_HRTIM_WaveformTimerConfig(&hhrtim1, HRTIM_TIMERINDEX_TIMER_A, &pTimerCfg) != HAL_OK)
{
Error_Handler();
}
pCompareCfg.CompareValue = 320;
if (HAL_HRTIM_WaveformCompareConfig(&hhrtim1, HRTIM_TIMERINDEX_TIMER_A, HRTIM_COMPAREUNIT_1, &pCompareCfg) != HAL_OK)
{
Error_Handler();
}
pCompareCfg.CompareValue = 160;
pCompareCfg.AutoDelayedMode = HRTIM_AUTODELAYEDMODE_REGULAR;
pCompareCfg.AutoDelayedTimeout = 0x0000;
if (HAL_HRTIM_WaveformCompareConfig(&hhrtim1, HRTIM_TIMERINDEX_TIMER_A, HRTIM_COMPAREUNIT_2, &pCompareCfg) != HAL_OK)
{
Error_Handler();
}
pDeadTimeCfg.Prescaler = HRTIM_TIMDEADTIME_PRESCALERRATIO_MUL8;
pDeadTimeCfg.RisingValue = 103;
pDeadTimeCfg.RisingSign = HRTIM_TIMDEADTIME_RISINGSIGN_POSITIVE;
pDeadTimeCfg.RisingLock = HRTIM_TIMDEADTIME_RISINGLOCK_WRITE;
pDeadTimeCfg.RisingSignLock = HRTIM_TIMDEADTIME_RISINGSIGNLOCK_READONLY;
pDeadTimeCfg.FallingValue = 103;
pDeadTimeCfg.FallingSign = HRTIM_TIMDEADTIME_FALLINGSIGN_POSITIVE;
pDeadTimeCfg.FallingLock = HRTIM_TIMDEADTIME_FALLINGLOCK_WRITE;
pDeadTimeCfg.FallingSignLock = HRTIM_TIMDEADTIME_FALLINGSIGNLOCK_READONLY;
if (HAL_HRTIM_DeadTimeConfig(&hhrtim1, HRTIM_TIMERINDEX_TIMER_A, &pDeadTimeCfg) != HAL_OK)
{
Error_Handler();
}
pOutputCfg.Polarity = HRTIM_OUTPUTPOLARITY_HIGH;
pOutputCfg.SetSource = HRTIM_OUTPUTSET_TIMPER;
pOutputCfg.ResetSource = HRTIM_OUTPUTRESET_TIMCMP1;
pOutputCfg.IdleMode = HRTIM_OUTPUTIDLEMODE_NONE;
pOutputCfg.IdleLevel = HRTIM_OUTPUTIDLELEVEL_ACTIVE;
pOutputCfg.FaultLevel = HRTIM_OUTPUTFAULTLEVEL_NONE;
pOutputCfg.ChopperModeEnable = HRTIM_OUTPUTCHOPPERMODE_DISABLED;
pOutputCfg.BurstModeEntryDelayed = HRTIM_OUTPUTBURSTMODEENTRY_REGULAR;
if (HAL_HRTIM_WaveformOutputConfig(&hhrtim1, HRTIM_TIMERINDEX_TIMER_A, HRTIM_OUTPUT_TA1, &pOutputCfg) != HAL_OK)
{
Error_Handler();
}
pOutputCfg.SetSource = HRTIM_OUTPUTSET_NONE;
pOutputCfg.ResetSource = HRTIM_OUTPUTRESET_NONE;
pOutputCfg.IdleLevel = HRTIM_OUTPUTIDLELEVEL_INACTIVE;
if (HAL_HRTIM_WaveformOutputConfig(&hhrtim1, HRTIM_TIMERINDEX_TIMER_A, HRTIM_OUTPUT_TA2, &pOutputCfg) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN HRTIM1_Init 2 */
/* USER CODE END HRTIM1_Init 2 */
HAL_HRTIM_MspPostInit(&hhrtim1);
}I also attached main.c just in case.
So if the ADC init is analysed, it can be seen how the trigger is supposed to be HRTIM_externalTRG1, which in the HRTIM init is HRTIM_ADCTRIGGEREVENT13_TIMERA_CMP2, what am I missing?
In the debugging I also tried creating an interrupt at CMP2 event with the function below, but the interruption never triggered.
void HAL_HRTIM_Compare2EventCallback(HRTIM_HandleTypeDef * hhrtim,
uint32_t TimerIdx)
{
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_10);
}In HRTIM_DualBuck there's a clear eexplanation of how the setting should be, but the graphical configurator of STM32CubeIDE wont let me select some of the options, like scanning mode or discontinuous injection mode for the ADC. This document which should be working can be seen in https://github.com/eleciawhite/STM32Cube/blob/master/STM32Cube_FW_F3_V1.3.0/Projects/STM32F3348-Discovery/Examples/HRTIM/HRTIM_DualBuck/Src/main.c
Best regards,
murgui.
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