Posted on February 15, 2018 at 11:25Hi everyone,
I'm tryng to use DMA with ADC on STM32L051x6 MCU.
When i see the Memory dump at the memory address of variable i takes the correct value from ADC DR but DMAIrq doesn't work never
Can somebody help me?
Thanks in advance
bool LED_CURRENT_ADC_Init(void)
{
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA1); //Enable DMA Clock
DMA1_CSELR -> CSELR &= 0xFFFFFFF0; //Remap of DMA channels to ADC
LL_ADC_REG_SetDMATransfer(ADC1, LL_ADC_REG_DMA_TRANSFER_UNLIMITED); //Enable DMA transfer on ADC
DMA1_Channel1 -> CPAR = (uint32_t) (&(ADC1->DR)); //Configure the ADC data register address
DMA1_Channel1->CMAR = (uint32_t)(ADC_val); //Configure the memory address
DMA1_Channel1->CNDTR = 1; //Configure the number of DMA tranfer to be performs on channel 1
LL_DMA_SetChannelPriorityLevel (DMA1, LL_DMA_CHANNEL_1, LL_DMA_PRIORITY_VERYHIGH);
LL_DMA_SetMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MODE_CIRCULAR); //Set mode LL_DMA_MODE_NORMAL LL_DMA_MODE_CIRCULAR
LL_DMA_SetDataTransferDirection(DMA1, LL_DMA_CHANNEL_1, LL_DMA_DIRECTION_PERIPH_TO_MEMORY); //Set direction
LL_DMA_SetMemorySize(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MDATAALIGN_WORD); //Set dimension
LL_DMA_SetMemoryIncMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MEMORY_INCREMENT);
LL_DMA_SetPeriphIncMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PERIPH_NOINCREMENT);
LL_DMA_SetPeriphSize(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PDATAALIGN_HALFWORD);
LL_DMA_EnableIT_TC(DMA1, LL_DMA_CHANNEL_1);
LL_DMA_EnableIT_TE(DMA1, LL_DMA_CHANNEL_1);
LL_DMA_EnableChannel(DMA1, LL_DMA_CHANNEL_1);
NVIC_EnableIRQ(DMA1_Channel1_IRQn);
NVIC_SetPriority(DMA1_Channel1_IRQn, 1);
LL_ADC_SetClock(ADC1, LL_ADC_CLOCK_SYNC_PCLK_DIV1);
LL_ADC_SetSamplingTimeCommonChannels(ADC1, LL_ADC_SAMPLINGTIME_7CYCLES_5);
LL_ADC_SetResolution(ADC1, LL_ADC_RESOLUTION_12B);
LL_ADC_SetDataAlignment(ADC1, LL_ADC_DATA_ALIGN_RIGHT);
LL_ADC_REG_SetSequencerChannels(ADC1, LL_ADC_CHANNEL_3);
LL_ADC_REG_SetContinuousMode(ADC1, LL_ADC_REG_CONV_SINGLE); //LL_ADC_REG_CONV_SINGLE LL_ADC_REG_CONV_CONTINUOUS
LL_ADC_ClearFlag_ADRDY(ADC1);
LL_ADC_EnableIT_EOS(ADC1);
LL_ADC_Enable(ADC1);
while(!LL_ADC_IsActiveFlag_ADRDY(ADC1))
{
}
return true;
}
#dma-adc
