STM32F334R8 ADC problem

Hello everyone!

I am trying to use the ADC of my NUCLEO-F334R8 board. I want to read the PC1 pin (ADC12, channel 7). I try to initialize the ADC with the following code:

void BSP_ADC_Init()
{
 // Enable GPIOC clock
 RCC->AHBENR |= RCC_AHBENR_GPIOCEN;

 // Configure pin PC1 as analog
 GPIOC->MODER &= ~GPIO_MODER_MODER1_Msk;
 GPIOC->MODER |= (0x03 << GPIO_MODER_MODER1_Pos);

 // Enable ADC clock
 RCC->AHBENR |= RCC_AHBENR_ADC12EN;

 // Reset ADC configuration
 ADC1->CR = 0x00000000;
 ADC1->CFGR = 0x00000000;
 ADC1->SQR1 = 0x00000000;

 // Enable continuous conversion mode
 ADC1->CFGR |= ADC_CFGR_CONT;

 // Select channel 7
 ADC1->SQR1 |= (0x07 << ADC_SQR1_SQ1_Pos);

 // Set sampling time to 19.5 ADC clock cycles
 ADC1->SMPR1 = (0x04 << ADC_SMPR1_SMP7_Pos);

 // 12-bit resolution
 ADC1->CFGR |= (0x00 << ADC_CFGR_RES_Pos);

 // Select PCLK/2 as ADC clock
 RCC->CFGR2 |= (0x11 << RCC_CFGR2_ADCPRE12_Pos);

 // Enable ADC
 ADC1->CR |= ADC_CR_ADEN;

 // Start conversion
 ADC1->CR |= ADC_CR_ADSTART;
}

But it seems not to work. In the main, I get stuck in the loop:

// Wait here until ADC EOC
while ((ADC1->ISR & ADC_ISR_EOC) != ADC_ISR_EOC);

EOC never sets and DR is always 0.

Could anyone help me?