Skip to main content
V
Vero
Associate II
May 15, 2024
Solved

STM32F373 HAL functions for SDADC

  • May 15, 2024
  • 10 replies
  • 7495 views

Hello guys,

 I tried to use the HAL_SDAC functions to read two Analog signals (0-3.3V) with DMA but I didn't have good results.

That's why I started reading only one Analog signal in Polling mode (ING 5)....unfortunately even in this case I always read zero (AD_result=0)

I am using the STM32F373 and STM32CubeIDE.

Any good ideas?

My configuration:

Vero_0-1715778269997.pngVero_1-1715778306014.png

 

The code in main.c:

/* Initialize all configured peripherals */

MX_SDADC1_Init();

HAL_SDADC_CalibrationStart(&hsdadc1, SDADC_CALIBRATION_SEQ_1)

HAL_SDADC_PollForCalibEvent(&hsdadc1, 10);

 

HAL_SDADC_SelectRegularTrigger(&hsdadc1, SDADC_SOFTWARE_TRIGGER);

 

HAL_SDADC_AssociateChannelConfig(&hsdadc1, SDADC_CHANNEL_5, SDADC_CONF_INDEX_0) ;

HAL_SDADC_ConfigChannel(&hsdadc1, SDADC_CHANNEL_5, SDADC_CONTINUOUS_CONV_OFF);

 

HAL_SDADC_Start(&hsdadc1);

 

while (1){

HAL_SDADC_PollForConversion(&hsdadc1, 100); // Poll ADC1 Peripheral & TimeOut = 1mSec

AD_result = HAL_SDADC_GetValue(&hsdadc1); // Read ADC Conversion Result

}

This topic has been closed for replies.
Best answer by mƎALLEm

Hello,

The example is a part of STM32373C-EVAL demonstration firmware package downloadable from here.

located under: STM32373C-EVAL_FW_V1.0.0\Project\STM32373C-EVAL\src\waverecorder.c

10 replies

mƎALLEm
mƎALLEm
ST Technical Moderator
May 15, 2024

Hello,

Check your Vref voltage and I invite you to look at the examples of SDADC provided in STM32CubeF3 located under https://github.com/STMicroelectronics/STM32CubeF3/tree/master/Projects/STM32373C_EVAL/Examples/SDADC

To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
V
VeroAuthor
Associate II
May 15, 2024

I am using the ST demo board STM32373C-EVAL and the PB1 GPIO pin with the potentiometer.

The Vref is good..:grinning_face:

Vero_0-1715782036923.png

 

mƎALLEm
mƎALLEm
ST Technical Moderator
May 15, 2024

Check R52 0 ohm resistor,  already soldered?

SofLit_0-1715782423445.png

 

To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
V
VeroAuthor
Associate II
May 16, 2024

news...it seems if I do START and STOP of conversion whenever on the while loop the AD_result  is changing

 

while (1){

 

HAL_SDADC_Start(&hsdadc1);

HAL_SDADC_PollForConversion(&hsdadc1, 100); // Poll ADC1 Peripheral & TimeOut = 1mSec

AD_result = HAL_SDADC_GetValue(&hsdadc1); // Read ADC Conversion Result

HAL_SDADC_Stop(&hsdadc1);

}

 

This even though I put continuous mode ENABLE:

Vero_0-1715854661899.png

Now I'll drop this example in polling and try again to read 2 Analog signals (0-3.3V) with trigger timer and DMA.

In this mode (2 channels)  the only via in to use the injected conversion...correct?

V
VeroAuthor
Associate II
May 17, 2024

news... 2 analog signals ( injected conversion mode) with trigger software (no timer) and NO DMA is working....

 

 in MAIN:

MX_SDADC1_Init();

if( HAL_SDADC_CalibrationStart(&hsdadc1, SDADC_CALIBRATION_SEQ_1)!= HAL_OK)

HAL_SDADC_PollForCalibEvent(&hsdadc1, 10);

/* Start injected conversion in interrupt mode */

if (HAL_SDADC_InjectedStart_IT(&hsdadc1) != HAL_OK)

...................

 

void HAL_SDADC_InjectedConvCpltCallback(SDADC_HandleTypeDef *hsdadc)

{

/* Get conversion value */

if(ch==1)

{

measurements_SDADC[0] = HAL_SDADC_InjectedGetValue(&hsdadc1, &ch);}

else{

measurements_SDADC[1] = HAL_SDADC_InjectedGetValue(&hsdadc1, &ch);

}

}

 

Now I will try whit DMA and timer trigger

V
VeroAuthor
Associate II
May 17, 2024

The configuration for the previously example (2 analog signals ( injected conversion mode) with trigger software (no timer) and NO DMA)

 

Vero_0-1715932495912.pngVero_1-1715932510377.png

 

V
VeroAuthor
Associate II
May 17, 2024

Where I find the code examples of the SDADC Wave recorder ( cap 5.3 of AN4207)?

This example uses TIM3 as a trigger and DMA...maybe is the example for me...

 

mƎALLEm
mƎALLEmBest answer
ST Technical Moderator
May 17, 2024

Hello,

The example is a part of STM32373C-EVAL demonstration firmware package downloadable from here.

located under: STM32373C-EVAL_FW_V1.0.0\Project\STM32373C-EVAL\src\waverecorder.c

To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
V
VeroAuthor
Associate II
May 17, 2024

thank you!

if I need it will come back here to you

Terms & ConditionsAccessibility statement