//#############################################################################
//
// File: f2802x_examples_ccsv4/adc_soc/Example_F2802xAdcSoc.c
//
// title: F2802x ADC Start-Of-Conversion (SOC) Example Program.
//
// Group: C2000
// Target Device: TMS320F2802x
//
//! addtogroup example_list
//!

ADC Start-Of-Conversion (SOC)

//!
//! Interrupts are enabled and the ePWM1 is setup to generate a periodic
//! ADC SOC - ADCINT1. Two channels are converted, ADCINA4 and ADCINA2.
//!
//! Watch Variables:
//!
//! - Voltage1[10] - Last 10 ADCRESULT0 values
//! - Voltage2[10] - Last 10 ADCRESULT1 values
//! - ConversionCount - Current result number 0-9
//! - LoopCount - Idle loop counter
//
// (C) Copyright 2012, Texas Instruments, Inc.
//#############################################################################
// $TI Release: f2802x Support Library v200 $
// $Release Date: Tue Jul 24 10:01:39 CDT 2012 $
//#############################################################################
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
#include "f2802x_common/include/adc.h"
#include "f2802x_common/include/clk.h"
#include "f2802x_common/include/flash.h"
#include "f2802x_common/include/gpio.h"
#include "f2802x_common/include/pie.h"
#include "f2802x_common/include/pll.h"
#include "f2802x_common/include/wdog.h"
// Prototype statements for functions found within this file.
interrupt void adc_isr(void);
void Adc_Config(void);
// Global variables used in this example:
uint16_t LoopCount;
uint16_t ConversionCount;
uint16_t Voltage1[10];
uint16_t Voltage2[10];
ADC_Handle myAdc;
CLK_Handle myClk;
FLASH_Handle myFlash;
GPIO_Handle myGpio;
PIE_Handle myPie;
PWM_Handle myPwm;
void main(void)
[

CPU_Handle myCpu;
PLL_Handle myPll;
WDOG_Handle myWDog;

// Initialize all the handles needed for this application
myAdc = ADC_init((void *)ADC_BASE_ADDR, sizeof(ADC_Obj));
myClk = CLK_init((void *)CLK_BASE_ADDR, sizeof(CLK_Obj));
myCpu = CPU_init((void *)NULL, sizeof(CPU_Obj));
myFlash = FLASH_init((void *)FLASH_BASE_ADDR, sizeof(FLASH_Obj));
myGpio = GPIO_init((void *)GPIO_BASE_ADDR, sizeof(GPIO_Obj));
myPie = PIE_init((void *)PIE_BASE_ADDR, sizeof(PIE_Obj));
myPll = PLL_init((void *)PLL_BASE_ADDR, sizeof(PLL_Obj));
myPwm = PWM_init((void *)PWM_ePWM1_BASE_ADDR, sizeof(PWM_Obj));
myWDog = WDOG_init((void *)WDOG_BASE_ADDR, sizeof(WDOG_Obj));
// Perform basic system initialization
WDOG_disable(myWDog);
CLK_enableAdcClock(myClk);
(*Device_cal)();

//Select the internal oscillator 1 as the clock source
CLK_setOscSrc(myClk, CLK_OscSrc_Internal);

// Setup the PLL for x10 /2 which will yield 50Mhz = 10Mhz * 10 / 2
PLL_setup(myPll, PLL_Multiplier_10, PLL_DivideSelect_ClkIn_by_2);

// Disable the PIE and all interrupts
PIE_disable(myPie);
PIE_disableAllInts(myPie);
CPU_disableGlobalInts(myCpu);
CPU_clearIntFlags(myCpu);

// If running from flash copy RAM only functions to RAM
#ifdef _FLASH
memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
#endif
// Setup a debug vector table and enable the PIE
PIE_setDebugIntVectorTable(myPie);
PIE_enable(myPie);
// Register interrupt handlers in the PIE vector table
PIE_registerPieIntHandler(myPie, PIE_GroupNumber_10, PIE_SubGroupNumber_1, (intVec_t)&adc_isr);
// Initialize the ADC
ADC_enableBandGap(myAdc);
ADC_enableRefBuffers(myAdc);
ADC_powerUp(myAdc);
ADC_enable(myAdc);
ADC_setVoltRefSrc(myAdc, ADC_VoltageRefSrc_Int);
// Enable ADCINT1 in PIE
PIE_enableAdcInt(myPie, ADC_IntNumber_1);
// Enable CPU Interrupt 1
CPU_enableInt(myCpu, CPU_IntNumber_10);
// Enable Global interrupt INTM
CPU_enableGlobalInts(myCpu);
// Enable Global realtime interrupt DBGM
CPU_enableDebugInt(myCpu);
LoopCount = 0;
ConversionCount = 0;
// Configure ADC
//Note: Channel ADCINA4 will be double sampled to workaround the ADC 1st sample issue for rev0 silicon errata
ADC_setIntPulseGenMode(myAdc, ADC_IntPulseGenMode_Prior); //ADCINT1 trips after AdcResults latch
ADC_enableInt(myAdc, ADC_IntNumber_1); //Enabled ADCINT1
ADC_setIntMode(myAdc, ADC_IntNumber_1, ADC_IntMode_ClearFlag); //Disable ADCINT1 Continuous mode
ADC_setIntSrc(myAdc, ADC_IntNumber_1, ADC_IntSrc_EOC2); //setup EOC2 to trigger ADCINT1 to fire
ADC_setSocChanNumber (myAdc, ADC_SocNumber_0, ADC_SocChanNumber_A4); //set SOC0 channel select to ADCINA4
ADC_setSocChanNumber (myAdc, ADC_SocNumber_1, ADC_SocChanNumber_A4); //set SOC1 channel select to ADCINA4
ADC_setSocChanNumber (myAdc, ADC_SocNumber_2, ADC_SocChanNumber_A2); //set SOC2 channel select to ADCINA2
ADC_setSocTrigSrc(myAdc, ADC_SocNumber_0, ADC_SocTrigSrc_EPWM1_ADCSOCA); //set SOC0 start trigger on EPWM1A, due to round-robin SOC0 converts first then SOC1
ADC_setSocTrigSrc(myAdc, ADC_SocNumber_1, ADC_SocTrigSrc_EPWM1_ADCSOCA); //set SOC1 start trigger on EPWM1A, due to round-robin SOC0 converts first then SOC1
ADC_setSocTrigSrc(myAdc, ADC_SocNumber_2, ADC_SocTrigSrc_EPWM1_ADCSOCA); //set SOC2 start trigger on EPWM1A, due to round-robin SOC0 converts first then SOC1, then SOC2
ADC_setSocSampleWindow(myAdc, ADC_SocNumber_0, ADC_SocSampleWindow_7_cycles); //set SOC0 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
ADC_setSocSampleWindow(myAdc, ADC_SocNumber_1, ADC_SocSampleWindow_7_cycles); //set SOC1 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
ADC_setSocSampleWindow(myAdc, ADC_SocNumber_2, ADC_SocSampleWindow_7_cycles); //set SOC2 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
// Enable PWM clock
CLK_enablePwmClock(myClk, PWM_Number_1);

// Setup PWM
PWM_enableSocAPulse(myPwm); // Enable SOC on A group
PWM_setSocAPulseSrc(myPwm, PWM_SocPulseSrc_CounterEqualCmpAIncr); // Select SOC from from CPMA on upcount
PWM_setSocAPeriod(myPwm, PWM_SocPeriod_FirstEvent); // Generate pulse on 1st event
PWM_setCmpA(myPwm, 0x0080);// Set compare A value
PWM_setPeriod(myPwm, 0xFFFF); // Set period for ePWM1
PWM_setCounterMode(myPwm, PWM_CounterMode_Up); // count up and start
// Wait for ADC interrupt
for(;;)
[
LoopCount++;
]
]

interrupt void adc_isr(void)
[

//discard ADCRESULT0 as part of the workaround to the 1st sample errata for rev0
Voltage1[ConversionCount] = ADC_readResult(myAdc, ADC_ResultNumber_1);
Voltage2[ConversionCount] = ADC_readResult(myAdc, ADC_ResultNumber_2);
// If 10 conversions have been logged, start over
if(ConversionCount == 9)
[
ConversionCount = 0;
]
else ConversionCount++;
// Clear ADCINT1 flag reinitialize for next SOC
ADC_clearIntFlag(myAdc, ADC_IntNumber_1);
// Acknowledge interrupt to PIE
PIE_clearInt(myPie, PIE_GroupNumber_10);
return;
]