Analog Watchdog to wake the sleep mode in stm32

[mrsmile]

Hi,

 We use stm32f103c8t6 microcontroller. I need a output for Analog watchdog,adc read continuously background. I access analog value to activate sleep mode and wake up mode. I access the POT to Low threshold(0<100) to activate sleep mode and access a high threshold (>700) to activate MCU wake up mode. But  I need to ADC still read for these two conditions. So I'm already try this method to develop my code.But my output was not clear to me. I attach my code and I made a mistake pls correct me.

#include "main.h"

/* USER CODE BEGIN PV */

volatile uint8_t watchDogTrig=0;

uint16_t adc_data;

int i=0;

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/

/* USER CODE BEGIN 0 */

void adc_watchDog_Init(uint16_t low_threshold, uint16_t high_threshold)

{

/*Enable clock access to GPIOA*/

RCC->APB2ENR|=RCC_APB2ENR_IOPAEN;

  RCC->CFGR |= RCC_CFGR_ADCPRE_DIV6; 

// GPIOA->CRL= 0x00000000;    ///GPIO_MODER_MODE0; /*Set PA0 as analog mode*/

GPIOA->CRL |= GPIO_CRL_CNF0_1;

GPIOA->CRL &= ~(GPIO_CRL_CNF0_0);

ADC1->SMPR2 |= ADC_SMPR2_SMP0 | ADC_SMPR2_SMP1 | ADC_SMPR2_SMP2; 

ADC1->SQR1 &= ~ ADC_SQR1_L; 

ADC1->SQR3 &= ~ADC_SQR3_SQ1_0; 

RCC->APB2ENR|=RCC_APB2ENR_ADC1EN; /*Enable clock access to ADC1*/

ADC1->CR1|= ADC_CR1_EOCIE;    //Interrupt enable for EOC

ADC1->CR2|=ADC_CR2_CONT;      /*Enable continuous conversion*/

ADC1->CR1|=ADC_CR1_AWDSGL;    /*Enable watch dog on single channel*/

ADC1->CR1|=ADC_CR1_AWDIE;     /*Enable watch dog interrupt*/

ADC1->LTR=0;                  /*Set the low threshold*/

ADC1->LTR=low_threshold;

ADC1->HTR=0;                  /*Set the high threshold*/

ADC1->HTR=high_threshold;

ADC1->CR1&=~(0x1F<<ADC_CR1_AWDCH_0); /*Set watch dog channel channel to be channel 0*/

ADC1->CR1|=ADC_CR1_AWDEN;    /*Enable analog watchdog on regular channel*/

ADC1->CR2|=ADC_CR2_ADON;     /*Enable the ADC module*/

NVIC_EnableIRQ(ADC1_2_IRQn); /*Enable ADC1 interrupt in NVIC*/

// ADC1->CR2|=ADC_CR2_SWSTART;  /*Start the conversion*/

ADC1->CR2|=ADC_CR2_ADON;     /*Enable the ADC module*/

}

/* USER CODE END 0 */

 void sleep_mode(void)

 {

GPIOC->ODR |= 1<<13;

HAL_Delay(5000);

HAL_SuspendTick();

GPIOC->BRR = 1<<13;  // Just to indicate sleep mode is activated

HAL_PWR_EnableSleepOnExit();

// Enter the sleep MODE NOW....

HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFE);   // interrupt for wake up

 }

 void sleep_on_wake(void)

 {

HAL_ResumeTick();

   HAL_PWR_DisableSleepOnExit();

GPIOC->BSRR |= 1<<13;

HAL_Delay(150);

 }

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();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */

  MX_GPIO_Init();

  /* USER CODE BEGIN 2 */

   adc_watchDog_Init(100,4000);

RCC->APB2ENR |= RCC_APB2ENR_IOPCEN;

GPIOC->CRH = 0x00300000;

  /* USER CODE END 2 */

  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

    /* USER CODE END WHILE */

    if (watchDogTrig == 1) 

{

watchDogTrig = 0;

if (adc_data <100) 

{ 

  i=1;

}

if (adc_data > 100)

{

        i=0;

}

}

if(i==1)

{

sleep_mode();

}

if(i==0)

{

sleep_on_wake();

}

    /* USER CODE BEGIN 3 */

  }

  /* USER CODE END 3 */

}

void ADC1_2_IRQHandler(void)

{

if((ADC1->SR & ADC_SR_EOC) == ADC_SR_EOC)

{

adc_data = ADC1->DR;

/* Start conversion of regular Channels */

ADC1->CR2|= ADC_CR2_SWSTART;

}

if((ADC1->SR & ADC_SR_AWD) != 0)

{

watchDogTrig=1;

ADC1->SR &=~ADC_SR_AWD;

}

}