dac12_a_ex4_grouped.c

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//******************************************************************************
//MSP430F66x Demo - DAC12_A_0 & DAC12_A_1 grouped, positive ramp on DAC12_A_0 and
//negative ramp on DAC12_A_1, high settling speed/current.
//******************************************************************************
 
#include "driverlib.h"
 
void main (void)
{
    uint16_t dataToConvert = 0;
 
    //Stop Watchdog Timer
    WDT_A_hold(WDT_A_BASE);
 
    /*
     * Initialize DAC12_A_0
     * Multiply Vout by 1
     * Use high settling speed/current,
     * Auto trigger when data is set as,
     * long as conversions are enabled
     */
    DAC12_A_initParam param0 = {0};
    param0.submoduleSelect = DAC12_A_SUBMODULE_0;
    param0.outputSelect = DAC12_A_OUTPUT_1;
    param0.positiveReferenceVoltage = DAC12_A_VREF_AVCC;
    param0.outputVoltageMultiplier = DAC12_A_VREFx1;
    param0.amplifierSetting = DAC12_A_AMP_HIGHIN_HIGHOUT;
    param0.conversionTriggerSelect = DAC12_A_TRIGGER_ENC;
    DAC12_A_init(DAC12_A_BASE, &param0);
 
    /*Initialize DAC12_A_1
     * Choose P6.7 as output
     * Use AVcc as Vref+
     * Multiply Vout by 1
     * Use high settling speed/current
     * Auto trigger when data is set as long as conversions are enabled
     */
    DAC12_A_initParam param1 = {0};
    param1.submoduleSelect = DAC12_A_SUBMODULE_1;
    param1.outputSelect = DAC12_A_OUTPUT_1;
    param1.positiveReferenceVoltage = DAC12_A_VREF_AVCC;
    param1.outputVoltageMultiplier = DAC12_A_VREFx1;
    param1.amplifierSetting = DAC12_A_AMP_HIGHIN_HIGHOUT;
    param1.conversionTriggerSelect = DAC12_A_TRIGGER_ENC;
    DAC12_A_init(DAC12_A_BASE, &param1);
 
 
    //Group both DAC12_A's to sync output
    DAC12_A_enableGrouping(DAC12_A_BASE);
 
    //Calibrate output buffer for DAC12_A_0
    DAC12_A_calibrateOutput(DAC12_A_BASE,
        DAC12_A_SUBMODULE_0);
 
    //Calibrate output buffer for DAC12_A_0
    DAC12_A_calibrateOutput(DAC12_A_BASE,
        DAC12_A_SUBMODULE_1);
 
    //Enable Conversions for both DAC12_A_0 and DAC12_A_1
    DAC12_A_enableConversions(DAC12_A_BASE,
        DAC12_A_SUBMODULE_0);
    DAC12_A_enableConversions(DAC12_A_BASE,
        DAC12_A_SUBMODULE_1);
 
    for (;;)
    {
        dataToConvert++;
 
        //Set data for DAC12_A_0, which will not latch because it is grouped
        DAC12_A_setData(DAC12_A_BASE,
            DAC12_A_SUBMODULE_0,
            dataToConvert);
 
        //Set data for DAC12_A_1, which will latch both DAC's data buffers
        DAC12_A_setData(DAC12_A_BASE,
            DAC12_A_SUBMODULE_1,
            ~(dataToConvert));
        __no_operation();
    }
}