F28069M读取内部温度传感器的温度数据：

1. ePWM1 is set up to generate a periodic ADC SOC interrupt - ADCINT1
2. ADCINA5, which is internally connected to the temperature sensor

//###########################################################################
//
// FILE:   Example_2806xAdcTempSensor.c
//
// TITLE:  ADC Temperature Sensor Example
//
//! \addtogroup f2806x_example_list
//! 
 ADC Temperature Sensor (adc_temp_sensor)
//! 
//! In this example the ePWM1 is set up to generate a periodic ADC SOC
//! interrupt - ADCINT1. One channel is converted -  ADCINA5, which 
//! is internally connected to the temperature sensor.
//! 
//! \b Watch \b Variables \n 
//! - TempSensorVoltage[10] - Last 10 ADCRESULT0 values
//! - ConversionCount       - Current result number 0-9
//! - LoopCount             - Idle loop counter
//
//###########################################################################
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// $Release Date: $
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//###########################################################################

//
// Included Files
//
#include "DSP28x_Project.h"     // Device Headerfile and Examples Include File

//
// Function Prototypes
//
__interrupt void adc_isr(void);

//
// Globals
//
Uint16 LoopCount;
Uint16 ConversionCount;
Uint16 TempSensorVoltage[10];

//
// Main
//
void main(void)
{
    //
    // Step 1. Initialize System Control:
    // PLL, WatchDog, enable Peripheral Clocks
    // This example function is found in the F2806x_SysCtrl.c file.
    //
    InitSysCtrl();

    //
    // Step 2. Initialize GPIO:
    // This example function is found in the F2806x_Gpio.c file and
    // illustrates how to set the GPIO to it's default state.
    //
    // InitGpio();  // Skipped for this example

    //
    // Step 3. Clear all interrupts and initialize PIE vector table:
    // Disable CPU interrupts
    //
    DINT;

    //
    // Initialize the PIE control registers to their default state.
    // The default state is all PIE interrupts disabled and flags
    // are cleared.
    // This function is found in the F2806x_PieCtrl.c file.
    //
    InitPieCtrl();

    //
    // Disable CPU interrupts and clear all CPU interrupt flags:
    //
    IER = 0x0000;
    IFR = 0x0000;

    //
    // Initialize the PIE vector table with pointers to the shell Interrupt
    // Service Routines (ISR).
    // This will populate the entire table, even if the interrupt
    // is not used in this example.  This is useful for debug purposes.
    // The shell ISR routines are found in F2806x_DefaultIsr.c.
    // This function is found in F2806x_PieVect.c.
    //
    InitPieVectTable();

    //
    // Interrupts that are used in this example are re-mapped to
    // ISR functions found within this file.
    //
    EALLOW;  // This is needed to write to EALLOW protected register
    PieVectTable.ADCINT1 = &adc_isr;
    EDIS;    // This is needed to disable write to EALLOW protected registers

    //
    // Step 4. Initialize the ADC:
    // This function is found in F2806x_Adc.c
    //
    InitAdc();  // For this example, init the ADC
    AdcOffsetSelfCal();

    //
    // Step 5. Configure ADC to sample the temperature sensor on ADCIN5:
    // The output of Piccolo temperature sensor can be internally connected to 
    // the ADC through ADCINA5 via the TEMPCONV bit in the ADCCTL1 register. 
    // When this bit is set, any voltage applied to the external ADCIN5 pin 
    // is ignored.
    //
    EALLOW;
    
    //
    // Connect internal temp sensor to channel ADCINA5.
    //
    AdcRegs.ADCCTL1.bit.TEMPCONV 	= 1;
    
    EDIS;

    //
    // Step 6. Continue configuring ADC to sample the temperature sensor on 
    // ADCIN5: Since the temperature sensor is connected to ADCIN5, configure 
    // the ADC to sample channel ADCIN5 as well as the ADC SOC trigger and 
    // ADCINTs preferred. This example uses EPWM1A to trigger the ADC
    // to start a conversion and trips ADCINT1 at the end of the conversion.
    //

    //
    // ADC Configuration for Temp Sensor
    //
    EALLOW;
    AdcRegs.ADCCTL2.bit.ADCNONOVERLAP = 1;	// Enable non-overlap mode

    //
    // ADCINT1 trips after AdcResults latch
    //
    AdcRegs.ADCCTL1.bit.INTPULSEPOS	= 1;
    
    AdcRegs.INTSEL1N2.bit.INT1E     = 1;	// Enabled ADCINT1
    AdcRegs.INTSEL1N2.bit.INT1CONT  = 0;	// Disable ADCINT1 Continuous mode
    
    //
    // setup EOC0 to trigger ADCINT1 to fire
    //
    AdcRegs.INTSEL1N2.bit.INT1SEL	= 0;
    
    //
    // set SOC0 channel select to ADCINA5 
    // (which is internally connected to the temperature sensor)
    //
    AdcRegs.ADCSOC0CTL.bit.CHSEL 	= 5;
    
    AdcRegs.ADCSOC0CTL.bit.TRIGSEL 	= 5;	// set SOC0 start trigger on EPWM1A
    
    //
    // set SOC0 S/H Window to 26 ADC Clock Cycles, (25 ACQPS plus 1)
    //
    AdcRegs.ADCSOC0CTL.bit.ACQPS 	= 25;
    EDIS;

    //
    // Step 7. User specific code, enable interrupts:
    //

    //
    // Enable ADCINT1 in PIE
    //
    PieCtrlRegs.PIEIER1.bit.INTx1 = 1; // Enable INT 1.1 in the PIE
    IER |= M_INT1; 					   // Enable CPU Interrupt 1
    EINT;          					   // Enable Global interrupt INTM
    ERTM;          					   // Enable Global realtime interrupt DBGM

    LoopCount = 0;
    ConversionCount = 0;

    //
    // Assumes ePWM1 clock is already enabled in InitSysCtrl();
    //
    EPwm1Regs.ETSEL.bit.SOCAEN	= 1;		// Enable SOC on A group
    
    //
    // Select SOC from from CPMA on upcount
    //
    EPwm1Regs.ETSEL.bit.SOCASEL	= 4;
    
    EPwm1Regs.ETPS.bit.SOCAPRD 	= 1;		// Generate pulse on 1st event
    EPwm1Regs.CMPA.half.CMPA 	= 0x0080;	// Set compare A value
    EPwm1Regs.TBPRD				= 0xFFFF;	// Set period for ePWM1
    EPwm1Regs.TBCTL.bit.CTRMODE	= 0;		// count up and start

    //
    // Wait for ADC interrupt
    //
    for(;;)
    {
        LoopCount++;
    }
}

//
// adc_isr - 
//
__interrupt void
adc_isr(void)
{
    TempSensorVoltage[ConversionCount] = AdcResult.ADCRESULT0;

    //
    // If 10 conversions have been logged, start over
    //
    if(ConversionCount == 9)
    {
        ConversionCount = 0;
    }
    else
    {
        ConversionCount++;
    }

    //
    // Clear ADCINT1 flag reinitialize for next SOC
    //
    AdcRegs.ADCINTFLGCLR.bit.ADCINT1 = 1;
    
    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;   // Acknowledge interrupt to PIE

    return;
}

//
// End of File
//


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