I am facing the issue that ADC DMA cannot work even I try re-init in many ways. Information:
STM32L476
Stop mode and wake up via RTC
Can re-init USB so the terminal still works
Clock configuration
Only STOP mode has this issue. SLEEP mode ADC DMA triggers and works properly
STM32 goes to stop mode and wake up properly.
Print result register after wake up ADC ISR=0x00000003, CR=0x10000005, CFGR=0x80001903 TIM3 CR1=0x0001, CNT=6606, SR=0x001f
ADC conversion call by TIM3 event interrupt, enable DMA request continous.
I read ADCbuffer again and again but it does not update, no ADC & DMA interrupt
Can you help me to fix this problem? Here is my code:
uint32_t ADCbuffer[14]; // DMA/ADC result buffer
static uint32_t tick = 0;
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* Configure the peripherals common clocks */
PeriphCommonClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_ADC1_Init();
MX_USART1_UART_Init();
MX_TIM3_Init();
MX_USB_DEVICE_Init();
MX_RTC_Init();
MX_TIM2_Init();
MX_ADC2_Init();
/* USER CODE BEGIN 2 */
//BEEEEPPP
HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2);
htim2.Instance->CCR2 = htim2.Instance->ARR/2;
HAL_Delay(200);
htim2.Instance->CCR2 = 0;
//Start the ADC and triggers
//ADC1 regular conversions are triggered by timer3 which also gates the dividers
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_4);
htim3.Instance->CCR1 = htim3.Instance->ARR;
htim3.Instance->CCR4 = 2000;
GPIOB->ASCR |=0x01;
HAL_ADCEx_Calibration_Start(&hadc1, ADC_SINGLE_ENDED);
HAL_Delay(200);
HAL_ADC_Start_DMA(&hadc1, ADCbuffer,14);
__HAL_ADC_ENABLE_IT(&hadc1, ADC_IT_EOS);
HAL_ADCEx_InjectedStart(&hadc2);
uint8_t HiMsg[] = "hello\r\n";
CDC_Transmit_FS(HiMsg, strlen(HiMsg));
//Now we have a short delay to allow some initial readings to come in from the ADC
HAL_Delay(500);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
if (HAL_GetTick() - tick > 30000)
{
tick = HAL_GetTick();
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_13, 0); //LED OFF
HAL_SuspendTick();
HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 20480, RTC_WAKEUPCLOCK_RTCCLK_DIV16); //32768/16 = 2048
__disable_irq();
HAL_PWR_EnterSTOPMode(PWR_MAINREGULATOR_ON, PWR_STOPENTRY_WFI);
__enable_irq();
HAL_RTCEx_DeactivateWakeUpTimer(&hrtc);
SystemClock_Config();
HAL_ResumeTick();
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_13, 1); //LED ON
// init ADC hereeee
// ...
MX_USB_DEVICE_Init();
//Bip
HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2);
htim2.Instance->CCR2 = htim2.Instance->ARR/2;
HAL_Delay(2);
htim2.Instance->CCR2 = 0;
HAL_Delay(2000);
uint8_t HiMsg[] = "hello\r\n";
CDC_Transmit_FS(HiMsg, strlen(HiMsg));
HAL_Delay(50);
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_2);
}
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}