ADC Configuration

[SasiKumar_Vengam]

Hi,

We are trying to configure PTE16(ADC0) pin in the S32K312 MCU using S32 DS 3.5. We need to read the voltage level on that pin and need to control the pin accordingly. For your reference, find the details in the below image.

We configured this using an example, they have used interrupt. But we prefer to configure without using the ISR function.

Any simple implementation of ADC without ISR would help.

Thanks.

[_Leo_]

Hi,

Thank you so much for your interest in our products and for using our community.

You could refer to the following S32K Knowledge Base post:

[RTD400 LLD]K344 ADC SW+HW trigger

Hope it helps you.

Have a nice day!

[SasiKumar_Vengam]

For your reference, The main code used is:
/**************************************************** ADC sample code **************************************************************/


/* Get ADC max value from the resolution */
if (AdcHwUnit_0.AdcResolution == ADC_SAR_IP_RESOLUTION_8)
adcMax = (uint16_t) (1 << 8);
else if (AdcHwUnit_0.AdcResolution == ADC_SAR_IP_RESOLUTION_10)
adcMax = (uint16_t) (1 << 10);
else if (AdcHwUnit_0.AdcResolution == ADC_SAR_IP_RESOLUTION_12)
adcMax = (uint16_t) (1 << 12);
else if (AdcHwUnit_0.AdcResolution == ADC_SAR_IP_RESOLUTION_14)
adcMax = (uint16_t) (1 << 14);
else
adcMax = (uint16_t) (1 << 14);

status = (StatusType) Adc_Sar_Ip_Init(ADCHWUNIT_0_INSTANCE, &AdcHwUnit_0);
while (status != E_OK);

/* Call Calibration function multiple times, to mitigate instability of board source */
for(Index = 0; Index <= 5; Index++)
{
status = (StatusType) Adc_Sar_Ip_DoCalibration(ADCHWUNIT_0_INSTANCE);
if(status == E_OK)
{
break;
}
}
Adc_Sar_Ip_EnableNotifications(ADCHWUNIT_0_INSTANCE, ADC_SAR_IP_NOTIF_FLAG_NORMAL_ENDCHAIN | ADC_SAR_IP_NOTIF_FLAG_INJECTED_ENDCHAIN);

/* Start a SW triggered normal conversion on ADC_SAR */
Adc_Sar_Ip_StartConversion(ADCHWUNIT_0_INSTANCE, ADC_SAR_IP_CONV_CHAIN_NORMAL);
/* Wait for the notification to be triggered and read the data */
while (notif_triggered != TRUE)
{
__asm volatile ("nop");
}
notif_triggered = FALSE;


while(1)
{
//notif_triggered = TRUE;
data_bandgap = Adc_Sar_Ip_GetConvData(ADCHWUNIT_0_INSTANCE, ADC_SAR_USED_CH_BANDGAP);
data_POT_0 = Adc_Sar_Ip_GetConvData(ADCHWUNIT_0_INSTANCE, ADC_SAR_USED_CH_POT_0);

/* Process the result to get the value in volts */
data_bandgap_volt = ((float) data_bandgap / adcMax) * (ADC_VREFH - ADC_VREFL);
data_POT_0_volt = ((float) data_POT_0 / adcMax) * (ADC_VREFH - ADC_VREFL);
//
}