[Repost#2][F28M35x] "adc_soc_c28" example code problem

//###########################################################################
// FILE:   adc_soc_c28.c
// TITLE:  ADC1 Start-Of-Conversion (SOC) Example Program.
//
//! \addtogroup control_example_list
//! <h1> ADC1 Start of Conversion (adc_soc)</h1>
//!
//! This ADC example uses ePWM1 to generate a periodic
//! ADC SOC - ADCINT1. Two channels are converted,
//! ADC1A0 and ADC1A2.
//!
//! \b Watch \b Variables \n
//! - Voltage1[10]    - Last 10 ADCRESULT0 values
//! - Voltage2[10]    - Last 10 ADCRESULT1 values
//! - ConversionCount - Current result number 0-9
//! - LoopCount       - Idle loop counter
//
//###########################################################################
// $TI Release: F28M35x Support Library v201 $
// $Release Date: Fri Jun  7 10:51:13 CDT 2013 $
//###########################################################################

#include "DSP28x_Project.h"       // Device Headerfile and Examples Include File
#include <string.h>

#define  DUTY_CYCLE_A   500
#define  DUTY_CYCLE_B   500
#define  PERIOD         1000

// Prototype statements for functions found within this file.
__interrupt void adc1_isr(void);
void Adc_Config(void);

// Global variables used in this example:
Uint16 LoopCount;
Uint16 ConversionCount;
Uint16 Voltage1[10];
Uint16 Voltage2[10];

main()
{
    unsigned short analoginit;

// Step 1. Initialize System Control for Control and Analog Subsytems
// Enable Peripheral Clocks
// This example function is found in the F28M35x_SysCtrl.c file.
    InitSysCtrl();
    
// If project is linked into flash, copy critical code sections to RAM.    
#ifdef _FLASH
   memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
#endif    

// Step 2. Initialize GPIO:
// This example function is found in the F28M35x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio();  // Skipped for this example
    EALLOW;
    GpioG1CtrlRegs.GPADIR.bit.GPIO0      = 1;       //Set as output
    GpioG1CtrlRegs.GPADIR.bit.GPIO8      = 1;       //Set as output
    GpioG1CtrlRegs.GPAMUX1.bit.GPIO0       = 1;     //Set mux to EPWM1A
    GpioG1CtrlRegs.GPAMUX1.bit.GPIO8       = 3;     //Set mux to ADCSOCAn

    //##############################################################
	GpioG1CtrlRegs.GPCDIR.bit.GPIO70 = 1; //set PC6_GPIO70 as output
	//##############################################################

    EDIS;

// 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 F28M35x_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 F28M35x_DefaultIsr.c.
// This function is found in F28M35x_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 = &adc1_isr;
    EDIS;   // This is needed to disable write to EALLOW protected registers

// Step 4. Initialize all the Device Peripherals:
// This function is found in F28M35x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
    InitAdc1(); // For this example, init the ADC

// Step 5. 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;

// Configure ADC
    EALLOW;
    Adc1Regs.ADCCTL2.bit.ADCNONOVERLAP = 1;     // Enable non-overlap mode i.e.
                                                // conversion and future
                                                // sampling
                                                // events dont overlap
    Adc1Regs.ADCCTL1.bit.INTPULSEPOS   = 1;     // ADCINT1 trips after
                                                // AdcResults latch
    Adc1Regs.INTSEL1N2.bit.INT1E       = 1;     // Enabled ADCINT1
    Adc1Regs.INTSEL1N2.bit.INT1CONT    = 0;     // Disable ADCINT1 Continuous
                                                // mode
    Adc1Regs.INTSEL1N2.bit.INT1SEL     = 0;     // setup EOC0 to trigger ADCINT1
                                                // to fire
    Adc1Regs.ADCSOC0CTL.bit.CHSEL      = 0;     // set SOC0 channel select to
                                                // ADC1A0
    Adc1Regs.ADCSOC1CTL.bit.CHSEL      = 2;     // set SOC1 channel select to
                                                // ADC1A2
    AnalogSysctrlRegs.TRIG1SEL.all     = 5;     // Assigning EPWM1SOCA to
                                                // ADC TRIGGER 1 of the ADC module
    Adc1Regs.ADCSOC0CTL.bit.TRIGSEL    = 5;     // Set SOC0 start trigger to
                                                // ADC Trigger 1(EPWM1 SOCA) of the
                                                // adc
    Adc1Regs.ADCSOC1CTL.bit.TRIGSEL    = 5;     // set SOC1 start trigger to
                                                // ADC Trigger 1(EPWM1 SOCA) of the
                                                // adc
    Adc1Regs.ADCSOC0CTL.bit.ACQPS      = 6;     // set SOC0 S/H Window to 7 ADC
                                                // Clock Cycles, (6 ACQPS plus
                                                // 1)
    Adc1Regs.ADCSOC1CTL.bit.ACQPS      = 6;     // set SOC1 S/H Window to 7 ADC
                                                // Clock Cycles, (6 ACQPS plus
                                                // 1)
    EDIS;

//// Assumes ePWM1 clock is already enabled in InitSysCtrl();

    //Set event triggers (SOCA) for ADC SOC1
    EPwm1Regs.ETSEL.bit.SOCAEN         = 1;      // Enable SOC on A group
    EPwm1Regs.ETSEL.bit.SOCASEL = ET_CTRU_CMPA;  // Select SOC from CMPA on
                                                 // upcount
    EPwm1Regs.ETPS.bit.SOCAPRD         = 3;      // Generate pulse on every 3rd
                                                 // event

    // Time-base registers
    EPwm1Regs.TBPRD = PERIOD;                   // Set timer period, PWM
                                                // frequency = 1 / period
    EPwm1Regs.TBPHS.all = 0;                    // Time-Base Phase Register
    EPwm1Regs.TBCTR = 0;                        // Time-Base Counter Register
    EPwm1Regs.TBCTL.bit.PRDLD = TB_IMMEDIATE;   // Set Immediate load
    EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP;  // Count-up mode: used for
                                                // asymmetric PWM
    EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE;     // Disable phase loading
    EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_DISABLE;
    EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
    EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1;

    // Setup shadow register load on ZERO

    EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
    EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
    EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; // load on CTR=Zero
    EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; // load on CTR=Zero

    // Set Compare values

    EPwm1Regs.CMPA.half.CMPA = DUTY_CYCLE_A;     // Set duty 50% initially
    EPwm1Regs.CMPB = DUTY_CYCLE_B;               // Set duty 50% initially

    // Set actions

    EPwm1Regs.AQCTLA.bit.ZRO = AQ_SET;           // Set PWM2A on Zero
    EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR;         // Clear PWM2A on event A, up
                                                 // count

    EPwm1Regs.AQCTLB.bit.ZRO = AQ_CLEAR;         // Set PWM2B on Zero
    EPwm1Regs.AQCTLB.bit.CBU = AQ_SET;           // Clear PWM2B on event B, up
                                                 // count

// Wait for ADC interrupt
    for(;;)
    {
        LoopCount++;
        if(LoopCount>0x7FFF)
		{
			GpioG1DataRegs.GPCSET.bit.GPIO70=1;
		}
		else
		{
			GpioG1DataRegs.GPCCLEAR.bit.GPIO70=1;
		}
    }

}

__interrupt void  adc1_isr(void)
{
    Voltage1[ConversionCount] = Adc1Result.ADCRESULT0;
    Voltage2[ConversionCount] = Adc1Result.ADCRESULT1;

    // If 20 conversions have been logged, start over
    if(ConversionCount == 9)
    {
        ConversionCount = 0;
    }
    else ConversionCount++;

    Adc1Regs.ADCINTFLGCLR.bit.ADCINT1 = 1;  //Clear ADCINT1 flag reinitialize
                                            // for next SOC
    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; // Acknowledge interrupt to PIE

    return;
}