DAC output result input to ADC

[Ken_102633]

I'm new at STM32 MCU.

Is it possible that on STM32MP157D-DK1?

I first set a value to DAC and then use its output as input to ADC then finally get a digital output which must same as the value i set to DAC. (Without DMA)

If I can do that , how can I do this connection in between the DAC output and ADC input ?

Thank you all in advance.

Best Regards,

Ken

static void MX_DAC1_Init(void)
{

 DAC_ChannelConfTypeDef sConfig;

 hdac1.Instance = DAC1;
 if (HAL_DAC_Init(&hdac1) != HAL_OK)
 {
 Error_Handler();
 }
 sConfig.DAC_HighFrequency = DAC_HIGH_FREQUENCY_INTERFACE_MODE_AUTOMATIC;
 sConfig.DAC_SampleAndHold = DAC_SAMPLEANDHOLD_DISABLE;
 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
 sConfig.DAC_ConnectOnChipPeripheral = DAC_CHIPCONNECT_ENABLE;
 sConfig.DAC_UserTrimming = DAC_TRIMMING_FACTORY;
 if (HAL_DAC_ConfigChannel(&hdac1, &sConfig, DAC_CHANNEL_1) != HAL_OK)
 {
 Error_Handler();
 }
}
__STATIC_INLINE void Configure_ADC(void)
{
 ADC_ChannelConfTypeDef sConfig;

 hadc2.Instance = ADC2;

 hadc2.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
 hadc2.Init.Resolution = ADC_RESOLUTION_12B;
 hadc2.Init.ScanConvMode = ADC_SCAN_DISABLE; 
 hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
 hadc2.Init.LowPowerAutoWait = DISABLE;
 hadc2.Init.ContinuousConvMode = DISABLE; 
 hadc2.Init.NbrOfConversion = 1; 
 hadc2.Init.DiscontinuousConvMode = DISABLE; 
 hadc2.Init.NbrOfDiscConversion = 1; 
 hadc2.Init.ExternalTrigConv = ADC_SOFTWARE_START; 
 hadc2.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; 
 hadc2.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR;
 hadc2.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
 hadc2.Init.OversamplingMode = DISABLE;

 if (HAL_ADC_Init(&hadc2) != HAL_OK)
 {
 Error_Handler();
 }
 
 sConfig.Channel = ADC_CHANNEL_DAC1CH1_ADC2; 
 sConfig.Rank = ADC_REGULAR_RANK_1; 
 sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5; 
 sConfig.SingleDiff = ADC_SINGLE_ENDED; 
 sConfig.OffsetNumber = ADC_OFFSET_NONE; 
 sConfig.Offset = 0; 
 
 if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
 {
 Error_Handler();
 }
}

void Dac_to_Adc(void)
{ 
 if (HAL_DAC_SetValue(&hdac1, DAC_CHANNEL_1, DAC_ALIGN_12B_R, DIGITAL_SCALE_12BITS) != HAL_OK)
 {
	 Error_Handler();
 }
 HAL_Delay(1);

 /* Enable DAC Channel: channel corresponding to ADC channel ADC2_CHANNEL_16 */
 if (HAL_DAC_Start(&hdac1, DAC_CHANNEL_1) != HAL_OK)
 {
 /* Start Error */
 Error_Handler();
 }
 DAC_Buffer1 = HAL_DAC_GetValue (&hdac1, DAC_CHANNEL_1); // Get: 4095

 if (HAL_ADC_Start(&hadc2) != HAL_OK)
 {
 Error_Handler();
 }

 if (HAL_ADC_PollForConversion(&hadc2, 2000) != HAL_OK)
 {
 Error_Handler();
 }

 ADC_Buffer = HAL_ADC_GetValue(&hadc2); // Get: 2047

 if (HAL_ADC_Stop(&hadc2) != HAL_OK)
 {
 Error_Handler();
 }
}