STM32G030K6T6 ADC_DMA

[Sudhakar.R]

Hi,

I'm trying to configure the ADC DMA with STM32G030K6T6. But Analog value is not came.

below I given my code and i don't know where i made a mistake if any one know help me.

void ADC_Config(void)
{
	RCC->APBENR2 |= RCC_APBENR2_ADCEN; // ADC clock enable
	RCC->AHBENR |= RCC_AHBENR_DMA1EN; // DMA1 clock enable
	
	ADC1->CR |= ADC_CR_ADEN; // ADC enable
	ADC1->CFGR2 |= (1<<30); // 01: PCLK/2 (Synchronous clock mode)
	ADC1->CFGR1 |= (ADC_CFGR1_CONT | ADC_CFGR1_DMAEN | ADC_CFGR1_CHSELRMOD | ADC_CFGR1_DMACFG); // 1: Continuous conversion mode & Direct memory access enable & Direct memory access configuration
	
	ADC1->SMPR |= ADC_SMPR_SMP1_1; // Sampling time selection 1 (010: 7.5 ADC clock cycles)
	ADC1->CHSELR |= (ADC_CHSELR_CHSEL0 | ADC_CHSELR_CHSEL1 | ADC_CHSELR_CHSEL2); // Channel-x selection (Channel-x selection)
	
	ADC1->CR |= ADC_CR_ADEN; // ADC enable
	
	DMA1_Channel1->CPAR = (uint32_t)&(ADC1->DR); // peripheral Address
	DMA1_Channel1->CMAR = (uint32_t)Aout; // Memory Address
	DMA1_Channel1->CNDTR = 3; // No Of Data
	DMA1_Channel1->CCR |= (DMA_CCR_MINC | DMA_CCR_MSIZE_0 | DMA_CCR_PSIZE_0| DMA_CCR_CIRC | DMA_CCR_TEIE | DMA_CCR_TCIE); // Msize,Psize,CIRC,MINC
	DMA1_Channel1->CCR |= DMA_CCR_EN; // DMA enable
	
	NVIC_EnableIRQ(DMA1_Channel1_IRQn);
	NVIC_SetPriority(DMA1_Channel1_IRQn,0);
	
	ADC1->CR |= ADC_CR_ADEN; // ADC enable
}

[Sudhakar.R]

hi @Kamil Duljas​,

below i given my code,

#include<stm32g030xx.h>
 
volatile uint32_t Aout[3];
 
int main()
{
	RCC->IOPENR |= (RCC_IOPENR_GPIOAEN); // I/O port A clock enable
	
	GPIOA->MODER &= ~(GPIO_MODER_MODE0 | GPIO_MODER_MODE1 | GPIO_MODER_MODE2); // clear 0, 1, 2 pin
	GPIOA->MODER |= (GPIO_MODER_MODE0_0 | GPIO_MODER_MODE0_1 | GPIO_MODER_MODE1_0 | GPIO_MODER_MODE1_1 | GPIO_MODER_MODE2_0 | GPIO_MODER_MODE2_1); // 11: Analog mode
	
	RCC->APBENR2 |= RCC_APBENR2_ADCEN; // ADC clock enable
	RCC->AHBENR |= RCC_AHBENR_DMA1EN; // DMA1 clock enable
	
	DMA1_Channel1->CPAR = (uint32_t)&(ADC1->DR); // peripheral Address
	DMA1_Channel1->CMAR =(uint32_t)&Aout; // Memory Address
	DMA1_Channel1->CNDTR = 3; // No Of Data
	DMA1_Channel1->CCR |= (DMA_CCR_MINC | DMA_CCR_MSIZE_1 | DMA_CCR_PSIZE_1| DMA_CCR_CIRC | DMA_CCR_TEIE); // Msize,Psize,CIRC,MINC
	DMA1_Channel1->CCR |= DMA_CCR_EN; // DMA enable
 
	ADC1->CFGR2 |= (1<<30); // 01: PCLK/2 (Synchronous clock mode)
	ADC1->CFGR1 |= (ADC_CFGR1_CONT | ADC_CFGR1_DMAEN | ADC_CFGR1_CHSELRMOD | ADC_CFGR1_DMACFG); // 1: Continuous conversion mode & Direct memory access enable & Direct memory access configuration
	ADC1->SMPR |= ADC_SMPR_SMP1_1; // Sampling time selection 1 (010: 7.5 ADC clock cycles)
	ADC1->CHSELR |= (ADC_CHSELR_CHSEL1); // Channel-x selection (Channel-x selection)
	ADC1->ISR &= ~(ADC_ISR_EOC | ADC_ISR_EOS | ADC_ISR_OVR);
 
	NVIC_EnableIRQ(DMA1_Channel1_IRQn);
	NVIC_SetPriority(DMA1_Channel1_IRQn,0);
 
	ADC1->CR |= ADC_CR_ADEN; // ADC enable
	ADC1->CR |=ADC_CR_ADSTART;
	
	while(1)
	{
		
	}
}
 
void DMA1_Channel1_IRQHandler(void)
{
	while(!(DMA1->ISR & DMA_ISR_TCIF1)); // Check Transfer Complete Flag
	DMA1->IFCR |= DMA_IFCR_CTCIF1; // Clear Transfer Complete Flag
}

[Sudhakar.R]

hi @Community member​ 

How to configure DMAMUX for ADC ?

[waclawek.jan]

I don't use the 'G0, but generally, you look at the input requests mapping table:

 

and write the number of request (here: 5) into the chosen DMAMUX channel's DMAMUX_CxCR.DMAREQ_ID register.

Note, that DMAMUX channels are onfusingly numbered starting with 0, whereas DMA channels are numbered starting with 1, so for DMA1 Channel1 you should use DMAMUX channel 0.

JW