ADC DMA does not work after wake up STM32

Question

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 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 */
}

• Nguyễn Phùng Thái Cường: I found the problem, I forgot init peripheral clock, my bad