Please Help!! Why am I not able to setup ADC on STM32F030?

[KHe.1]

I am trying to setup the ADC channel on PA0. I have first set the pin mode to additional function. Then I have followed the examples provided in the reference manual. However, it doesn't turn on anything, either the calibration or the enable. It is not even selecting channel 0. Am I missing something or did something wrong? This is my ADC related code below:

int main()
 
{
 
	//Set PA0 to Additional function mode
 
        GPIOA->MODER |= (3 << 0) ;
 
 
	//Ensure ADC is Disabled
 
	if ((ADC1->CR & ADC_CR_ADEN) != 0)
 
        ADC1->CR &= (uint32_t)(~ADC_CR_ADEN);
 
 
	//Start ADC Calibration
 
	ADC1->CR |= ADC_CR_ADCAL;
 
	//Wait for ADC Calibration to Complete
 
	while ((ADC1->CR & ADC_CR_ADCAL) != 0) 
	{
	}
 
 
	//Wait for TIM14 is Enabled
       //TIM14 is used as a forever interrupt loop in my while function as a clock
	while ((TIM14->CR1 & TIM_CR1_CEN) == 0)
	{
	}
 
	
        //Select TIM14 by writing 00 in CKMODE
	ADC1->CFGR2 &= (~ADC_CFGR2_CKMODE);
 
	//Enable ADC
	ADC1->CR |= ADC_CR_ADEN;
	while ((ADC1->ISR & ADC_ISR_ADRDY) == 0)
	{
        }
 
	//Enable Continuous Mode
	ADC1->CFGR1 |= ADC_CFGR1_CONT;
 
	//Select Channel 0
	ADC1->CHSELR |= ADC_CHSELR_CHSEL0;
 
	//Select Sampling Mode, TODO: MAY NEED TO ADJUST LATER
	ADC1->SMPR |= ADC_SMPR_SMP_0 | ADC_SMPR_SMP_1 | ADC_SMPR_SMP_2;
 
	//Disable External Trigger
	ADC1->CFGR1 &= (~ADC_CFGR1_EXTEN);
 
	//Wait for ADC is Ready
	while ((ADC1->ISR & ADC_ISR_ADRDY) == 0)
	{
	}
 
 
 
	while (1)	
	{
 
         //Start Conversion
	ADC1->CR |= ADC_CR_ADSTART;
 
	//Fetch Converted Data
	ADC_Data = ADC1 ->DR;
 
         }
 
}
 
 
 

Thank you!

[waclawek.jan · Accepted solution]

You need to enable clock for each peripheral in RCC.

See examples at the end of RM.

Also the timer's CR1.CEN need to be set explicitly.

JW

[KHe.1]

Thank you @Community member​ ! It is all set now.

I thought I only need to setup ADC Clock Mode at CKMODE in ADC_CFGR2.

I added the following code and it works now.

	//Enable ADC Interface Clock
	RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;
 
	//Enable HSI14 Clock
	RCC->CR2 |= RCC_CR2_HSI14ON;
	//Wait for HSI14 Clock to be Ready
	while ((RCC->CR2 & RCC_CR2_HSI14RDY) == 0);