ADC

I am using Kiel IDE

Here is my attempt to initialize it 

//set clock to 14MHz prscaler
ADC->CCR |= ADC_CCR_ADCPRE_0;
ADC->CCR |= ADC_CCR_ADCPRE_1;
ADC->CCR |= ADC_CCR_TSVREFE;

//RCC clock for ADC and for alternate function
RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;

//Enable GPIO port
CLOCK_INIT_PORTA();

//configure input push pull
//setting up the input
//setting up the mode
GPIOA->MODER |= (GPIO_MODER_MODE2_1);
GPIOA->MODER |= (GPIO_MODER_MODE2_0);//11 input output

//setting up the PUPDR
//since we have pulled down push pull alternate function
GPIOA->PUPDR &=~(GPIO_PUPDR_PUPD2_0);
GPIOA->PUPDR &=~(GPIO_PUPDR_PUPD2_1);//analog value

//Enable end of conversion interrupt
ADC1->CR1 |= ADC_CR1_EOCIE;



//ADC Resolution 8 bit
ADC1->CR1 &=~ ADC_CR1_RES_0;
ADC1->CR1 |= ADC_CR1_RES_1;

//Set sampling rate choose maximum for the highst precision
ADC1->SMPR2 |= ADC_SMPR2_SMP2_0;
ADC1->SMPR2 |= ADC_SMPR2_SMP2_1;
ADC1->SMPR2 |= ADC_SMPR2_SMP2_2;

//set channels in sequence reg
ADC1->SQR3 |= ADC_SQR3_SQ1_1;

//Enable ADC that is ADON
//Enable continuous mode
ADC1->CR2 |= (ADC_CR2_ADON)|(ADC_CR2_CONT);

//delai for 2ms
wait_For_t(20);

//turn on ADC adon for the second time
//delay 2 ms
ADC1->CR2 |= ADC_CR2_ADON;
wait_For_t(20);

//Run clibration
//delay to allow the finish
wait_For_t(2);

Hello, I have moved your question to the Keil forum, however you are more likely to get a response from a device specific query like this from the STM32 specific forum below (ST website):

https://community.st.com/s/topic/0TO0X000000BSqSWAW/stm32-mcus