Btukfyl

I work on a project and I wanted to use ADC conversion (I work on an stm32L476), but I'm struggling with my code. My goal was to put a potentiometer between the ground and my 3.3 pin and see the result on PA1 with Putty. Here is the code of my ADC initialisation :

void BSP_Threshold_Init(){

    //Enable GPIOA clock

    RCC->AHB2ENR |= RCC_AHB2ENR_GPIOAEN;



    //Configure PA1 as input

    GPIOA->MODER &= ~GPIO_MODER_MODE1_Msk;

    GPIOA->MODER |= (0x00 <<GPIO_MODER_MODE1_Pos);



     // Enable ADC clock

    RCC->APB2ENR |= RCC_AHB2ENR_ADCEN;



    // Reset ADC configuration

    ADC1->CR    = 0x00000000;

    ADC1->CFGR  = 0x00000000;

    ADC1->CFGR2  = 0x00000000;

    ADC1->SQR1 = 0x00000000;

    ADC123_COMMON->CCR = 0x00000000;



    // Enable continuous conversion mode

    ADC1->CFGR |= ADC_CFGR_CONT;



    // 12-bit resolution

    ADC1->CFGR |= (0x00 <<ADC_CFGR_RES_Pos);



    // Set sampling time to 24.5 ADC clock cycles

    ADC1->SMPR1 |= (0x03 << 0U);



    // Choose the number of conversion (here 1)

    ADC1->SQR1 |= (0x00 << 0U);



    //Choose the channel of the first conversion

    ADC1->SQR1 |= (0x01 << 6U);



    //// Select HCLK/1 as ADC clock

    ADC123_COMMON->CCR |= (0x01 <<ADC_CCR_CKMODE_Pos);



    // Enable ADC

    ADC1->CR |= ADC_CR_ADEN;



    // Start conversion

    ADC1->CR |= ADC_CR_ADSTART;



}

Then in my main, I want to print the value of my ADC on Putty (I worked with Putty several times, so I don't think there is a problem here).

Here is the portion of code in my main :

while(1)

    {



        // Wait here until ADC EOC

        while ((ADC1->ISR & ADC_ISR_EOC) != ADC_ISR_EOC);



        // Report result to console

        my_printf("ADC value = %xrn", ADC1->DR);



        // Wait about 200ms

        for (i=0; i<500000; i++);



    }

I printed other things in the init phase with my_printf, but when comes the time to do the loop, nothing appears. Do you have any clues of what I could do wrong ? I don't know if my problem comes from my ADC configuration, or if it comes from my clock configuration or the way I wait for the ADC conversion in my main.

Thanks in advance.