RM0367 Rev 7 989/1043
RM0367 Code examples
1020
A.8.8 Continuous conversion sequence code example - Hardware trigger
/* (1) Select HSI16 by writing 00 in CKMODE (reset value) */
/* (2) Select the external trigger on TIM22_TRGO (TRG4 i.e. EXTSEL = 100
and rising edge, the continuous mode and scanning direction */
/* (3) Select CHSEL4, CHSEL9 and CHSEL17 */
/* (4) Select a sampling mode of 111 i.e. 239.5 ADC clk to be greater
than 5us */
/* (5) Enable interrupts on EOC, EOSEQ and overrrun */
/* (6) Wake-up the VREFINT (only for Temp sensor and VRefInt) */
//ADC1->CFGR2 &= ~ADC_CFGR2_CKMODE; /* (1) */
ADC1->CFGR1 |= ADC_CFGR1_EXTEN_0 | ADC_CFGR1_EXTSEL_2 | ADC_CFGR1_CONT \
| ADC_CFGR1_SCANDIR; /* (2) */
ADC1->CHSELR = ADC_CHSELR_CHSEL4 | ADC_CHSELR_CHSEL9 \
| ADC_CHSELR_CHSEL17; /* (3 */
ADC1->SMPR |= ADC_SMPR_SMP_0 | ADC_SMPR_SMP_1 | ADC_SMPR_SMP_2; /* (4) */
ADC1->IER = ADC_IER_EOCIE | ADC_IER_EOSEQIE | ADC_IER_OVRIE; /* (5) */
ADC->CCR |= ADC_CCR_VREFEN; /* (6) */
/* Configure NVIC for ADC */
/* (1) Enable Interrupt on ADC */
/* (2) Set priority for ADC */
NVIC_EnableIRQ(ADC1_COMP_IRQn); /* (1) */
NVIC_SetPriority(ADC1_COMP_IRQn,0); /* (2) */
A.8.9 DMA one shot mode sequence code example
/* (1) Enable the peripheral clock on DMA */
/* (2) Enable DMA transfer on ADC - DMACFG is kept at 0 for one shot mode */
/* (3) Configure the peripheral data register address */
/* (4) Configure the memory address */
/* (5) Configure the number of DMA transfer to be performs
on DMA channel 1 */
/* (6) Configure increment, size and interrupts */
/* (7) Enable DMA Channel 1 */
RCC->AHBENR |= RCC_AHBENR_DMA1EN; /* (1) */
ADC1->CFGR1 |= ADC_CFGR1_DMAEN; /* (2) */
DMA1_Channel1->CPAR = (uint32_t) (&(ADC1->DR)); /* (3) */
DMA1_Channel1->CMAR = (uint32_t)(ADC_array); /* (4) */
DMA1_Channel1->CNDTR = NUMBER_OF_ADC_CHANNEL; /* (5) */
DMA1_Channel1->CCR |= DMA_CCR_MINC | DMA_CCR_MSIZE_0 | DMA_CCR_PSIZE_0 \
| DMA_CCR_TEIE | DMA_CCR_TCIE ; /* (6) */
DMA1_Channel1->CCR |= DMA_CCR_EN; /* (7) */
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