TriCore TC27D VADC(Versatile ADC)

HW: ShieldBuddy TC275

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Related header

• IfxVadc_cfg.h: VADC on-chip implementation data.
• IfxVadc_PinMap.h: VADC I/O map.
• IfxVadc_Adc.h: VADC ADC details.
• IfxVadc.h: VADC basic functionality.

IfxVadc_Adc.h

VADC comprises of independent analog channels with Analog/Digital converters to convert analog input to discrete digital output.

Examples

Background

#include "IfxCpu.h"
#include "IfxScuWdt.h"
#include "IfxVadc_Adc.h"
#include "Ifx_Types.h"

IfxCpu_syncEvent cpuSyncEvent = 0;

// VADC handle
IfxVadc_Adc       vadc;
IfxVadc_Adc_Group adcGroup;

int core0_main(void) {
    IfxCpu_enableInterrupts();
    /*
     * !!WATCHDOG0 AND SAFETY WATCHDOG ARE DISABLED HERE!!
     * Enable the watchdog in the demo if it is required and also service the
     * watchdog periodically
     * */
    IfxScuWdt_disableCpuWatchdog(IfxScuWdt_getCpuWatchdogPassword());
    IfxScuWdt_disableSafetyWatchdog(IfxScuWdt_getSafetyWatchdogPassword());

    /* Cpu sync event wait*/
    IfxCpu_emitEvent(&cpuSyncEvent);
    IfxCpu_waitEvent(&cpuSyncEvent, 1);

    IfxVadc_Adc_Config adcConfig;
    IfxVadc_Adc_initModuleConfig(&adcConfig, &MODULE_VADC);
    IfxVadc_Adc_initModule(&vadc, &adcConfig);
    IfxVadc_Adc_GroupConfig adcGroupConfig;
    IfxVadc_Adc_initGroupConfig(&adcGroupConfig, &vadc);
    // group 0
    adcGroupConfig.groupId = IfxVadc_GroupId_0;
    adcGroupConfig.master  = adcGroupConfig.groupId;
    adcGroupConfig.arbiter.requestSlotBackgroundScanEnabled        = TRUE;
    adcGroupConfig.backgroundScanRequest.autoBackgroundScanEnabled = TRUE;
    adcGroupConfig.backgroundScanRequest.triggerConfig.gatingMode
        = IfxVadc_GatingMode_always;
    IfxVadc_Adc_initGroup(&adcGroup, &adcGroupConfig);

    IfxVadc_Adc_ChannelConfig adcChannelConfig;
    IfxVadc_Adc_Channel       adcChannel;
    IfxVadc_Adc_initChannelConfig(&adcChannelConfig, &adcGroup);

    // channel 0
    adcChannelConfig.channelId         = (IfxVadc_ChannelId)(0);
    adcChannelConfig.resultRegister    = (IfxVadc_ChannelResult)(0);
    adcChannelConfig.backgroundChannel = TRUE;
    IfxVadc_Adc_initChannel(&adcChannel, &adcChannelConfig);

    // add to background scan
    unsigned channels = (1 << adcChannelConfig.channelId);
    unsigned mask     = channels;
    IfxVadc_Adc_setBackgroundScan(&vadc, &adcGroup, channels, mask);

    IfxVadc_Adc_startBackgroundScan(&vadc);

    while(1) {
        // wait for valid result
        Ifx_VADC_RES conversionResult;
        do {
            conversionResult = IfxVadc_Adc_getResult(&adcChannel);
        } while(! conversionResult.B.VF);

        uint32 actual = conversionResult.B.RESULT;
        // print
    }

    return 1;
}