scan-adc

address.c

/* Set peripheral address as ADC data register */
DMA1_Channel1->CPAR  = (uint32_t)&ADC1->DR;

/* Set memory address as adc_value buffer */
DMA1_Channel1->CMAR  = (uint32_t)adc_value;

/* Set number of transfers */
DMA1_Channel1->CNDTR = 2U;

direction.c

/* Set transfer direction : Peripheral -> Memory */
DMA1_Channel1->CCR &= ~DMA_CCR_DIR;

increment.c

/* Enable memory increment */
DMA1_Channel1->CCR |= DMA_CCR_MINC;

/* Disable perpheral increment */
DMA1_Channel1->CCR &= ~DMA_CCR_PINC;

length.c

/* Set total conversions = 2 */
ADC1->SQR1 &= ~ADC_SQR1_L;
ADC1->SQR1 |= 1 << ADC_SQR1_L_Pos;

pinconfig.c

/* Configure PA1 & PA2 in analog input mode */
GPIOA->CRL &= ~(GPIO_CRL_CNF1 | GPIO_CRL_MODE1);
GPIOA->CRL &= ~(GPIO_CRL_CNF2 | GPIO_CRL_MODE2);

sampling.c

ADC1->SMPR2 |= (ADC_SMPR2_SMP1_1 | ADC_SMPR2_SMP1_0);
ADC1->SMPR2 |= (ADC_SMPR2_SMP2_1 | ADC_SMPR2_SMP2_0);

scan.c

/* Enable SCAN mode */
ADC1->CR1 |= ADC_CR1_SCAN;

/* Enable DMA request generation */
ADC1->CR2 |= ADC_CR2_DMA;

sequence.c

ADC1->SQR3 &= ~(ADC_SQR3_SQ1 | ADC_SQR3_SQ2);
ADC1->SQR3 |= 1 << ADC_SQR3_SQ1_Pos;
ADC1->SQR3 |= 2 << ADC_SQR3_SQ2_Po

size.c

/* Set memory size = 16 bits */
DMA1_Channel1->CCR &= ~DMA_CCR_MSIZE;
DMA1_Channel1->CCR |= DMA_CCR_MSIZE_0;

/* Set peripheral size=16bits */
DMA1_Channel1->CCR &= ~DMA_CCR_PSIZE;
DMA1_Channel1->CCR |= DMA_CCR_PSIZE_0;