Hi,
I am try to read four ADC Channels of ADC3 using DMA method. But I did not get the data.
Below is my programming
static void MX_ADC3_Init(void)
{
ADC_ChannelConfTypeDef sConfig = {0};
hadc3.Instance = ADC3;
hadc3.Init.Resolution = ADC_RESOLUTION_16B;
hadc3.Init.ScanConvMode = ADC_SCAN_ENABLE;
hadc3.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc3.Init.LowPowerAutoWait = DISABLE;
hadc3.Init.ContinuousConvMode = ENABLE;
hadc3.Init.NbrOfConversion = 4;
hadc3.Init.DiscontinuousConvMode = DISABLE;
hadc3.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc3.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc3.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR;
hadc3.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc3.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;
hadc3.Init.OversamplingMode = DISABLE;
if (HAL_ADC_Init(&hadc3) != HAL_OK)
{
Error_Handler();
}
sConfig.Channel = ADC_CHANNEL_0;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_810CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
sConfig.OffsetSignedSaturation = DISABLE;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = ADC_REGULAR_RANK_2;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
sConfig.Channel = ADC_CHANNEL_14;
sConfig.Rank = ADC_REGULAR_RANK_3;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
sConfig.Channel = ADC_CHANNEL_15;
sConfig.Rank = ADC_REGULAR_RANK_4;
if (HAL_ADC_ConfigChannel(&hadc3, &sConfig) != HAL_OK)
{
Error_Handler();
}
}
#define SIZE 3
uint16_t ADC_INT[SIZE];
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc)
{
if(hadc3.Instance == ADC3)
INTADC=1;
}
SCB_InvalidateDCache_by_Addr((uint32_t*)(((uint32_t)ADC_INT) & ~(uint32_t)0x1F), SIZE+32);
HAL_ADC_Start_DMA(&hadc3,(uint32_t*)ADC_INT, SIZE);
while(1)
if(INTADC==1)
{
float OUTPUT1=0,OUTPUT2=0,OUTPUT3=0,OUTPUT5=0;
printf("IN ADC");
for(int i=0;i<=3;i++)
{
printf("ADC_INP[i]=%d\n\r",ADC_INT[i]);
}
ADC1_val=ADC_INT[0];
ADC2_val=ADC_INT[1];
ADC3_val=ADC_INT[2];
ADC5_val=ADC_INT[3];
ADC1_val=ADC1_val >> 2;
OUTPUT1=(3.3/4095)*ADC1_val;
printf("ADC1=%f\n\r",OUTPUT1);
ADC2_val=ADC2_val >> 2;
OUTPUT2=(3.3/4095)*ADC2_val;
printf("ADC2=%f\n\r",OUTPUT2);
ADC3_val=ADC3_val >> 2;
OUTPUT3=(3.3/4095)*ADC3_val;
printf("ADC3=%f\n\r",OUTPUT3);
ADC5_val=ADC5_val >> 2;
OUTPUT5=(3.3/4095)*ADC5_val;
printf("ADC5=%f\n\r",OUTPUT5);
}
When I call the SCB_Invalidate function before or after start ADC DMA the program gets stuck. I enable the DCACHE and ICACHE why programmed is get stuck. My ADC is 16bit.
