GPADC

Table of Contents

• Features Supported
• SysConfig Features
• Features NOT Supported
• Example Usage
• API

The GPADC driver provides API for safety monitoring of the inputs, such as the temperature sensor, voltage regulators to the device.

Features Supported

• 10-bit ADC
• Supports Inter Frame Monitoring Mode(IFM)
• Software command mechanism to trigger the conversion – Storage of min, max, and sum of the samples captured per channel

SysConfig Features

Note

It is strongly recommend to use SysConfig where it is available instead of using direct SW API calls. This will help simplify the SW application and also catch common mistakes early in the development cycle.

• Selection of Channel read mode
• Set Channel index number to read from
• Set Channel Bitmap
• Option to set the conversion mode
• Set Channel Configuration values

Features NOT Supported

Continous Time Monitoring Mode(CTM)

Example Usage

Include the below file to access the APIs

#include <drivers/gpadc.h>

GPADC Single Buffer Read

    int32_t status = SystemP_SUCCESS;
    uint16_t gpadc_result = 0;
    uint16_t channelCount;
    GPADC_ConvResultType convRes = GPADC_CONV_ERROR;
    
    for(channelCount=0; channelCount<CONFIG_GPADC_CHANNEL_NUM_INSTANCES; channelCount++)
    {
        convRes = GPADC_startSingleChannelConversion(gCfgPtr.channelConfig[channelCount].channelID, &gpadc_result);
    }
 

GPADC Group Buffer Read

    int32_t status = SystemP_SUCCESS;
    uint16_t gpadc_result[9];
    GPADC_channelsGroupSelectType channels;
    GPADC_ConvResultType convRes = GPADC_CONV_ERROR;
    uint8_t index =0;
    uint32_t adcInMv;
 
    channels.bits.b9_ChannelSelectionBitMap = (CONFIG_GPADC0_CHANNEL_BITMAP & 0x1FF);
 
    GPADC_setupResultBuffer(&gpadc_result[0]);
    convRes = GPADC_startGroupConversion(channels);
 
    for(index=0; index < MAX_GPADC_MEAS_SOURCES; index++)
    {
 
        adcInMv = (gpadc_result[index] * (UPPER_REFERENCE -LOWER_REFERENCE))/
                (1<<ADC_DEF_CHANNEL_RESOLUTION);
    }
 

GPADC Temperature Sensor Read

    int32_t convRes;
    GPADC_TempSensValueType tempValues;
    uint8_t numAverageSamples;
 
    GPADC_initTempMeasurement();
    numAverageSamples = 5U;
    convRes = GPADC_readTemperature(numAverageSamples, &tempValues);
 

API

APIs for GPADC