CCS/TMDSCNCD28335: expected an identifier error

Tool/software: Code Composer Studio

Hi All !

I am implementing low pass filter (LPF) in CCS4 Code and getting following error:

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Description Resource Path Location Type
#41 expected an identifier DSP2833x_Device.h /EV1 line 36 C/C++ Problem

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BELOW IS MY CODE

/*
* LPF1.c
*
* Created on: Jan 23, 2019
* Author: Ananda
*/

//
// Lab17: TMS320F28335
// (c) Frank Bormann
//
//###########################################################################
//
// FILE: Lab17.c
//
// TITLE: DSP28335ControlCARD; ePWM1A 2KHz output
// 25% pulse width active high
// low - pass filtered by function "IQssfir" (IQ-Math function)
// solution file for Lab17
//###########################################################################
// Ver | dd mmm yyyy | Who | Description of changes
// =====|=============|======|===============================================
// 3.0 | 12 Oct 2009 | F.B. | Lab17 for F28335;
// 3.1 | 29 Nov 2009 | F.B | Lab16 for F28335 @30MHz and PE revision 5
//###########################################################################
#include "DSP2833x_Device.h"
#include "IQmathLib.h"

#define AdcBufLen 50
#define AdcFsVoltage _IQ(3.0) // ADC full scale voltage

// external function prototypes
extern void InitSysCtrl(void);
extern void InitPieCtrl(void);
extern void InitPieVectTable(void);
extern void InitCpuTimers(void);
extern void InitAdc(void);
extern void ConfigCpuTimer(struct CPUTIMER_VARS *, float, float);
extern _iq IQssfir(_iq*, _iq*, Uint16);

// Prototype statements for functions found within this file.
void Gpio_select(void);
void Setup_ePWM1A(void);
interrupt void cpu_timer0_isr(void);
interrupt void adc_isr(void);
void Setup_ADC(void);

// global variables
_iq AdcBuf[AdcBufLen]; // ADC results buffer
_iq AdcBufFiltered[AdcBufLen]; // filtered ADC results buffer
_iq xBuffer[5] = {0,0,0,0,0}; // filter sample buffer
// filter coefficients
_iq coeffs[5] = {_IQ(0.0357), _IQ(0.2411), _IQ(0.4465), _IQ(0.2411), _IQ(0.0357)};

//###########################################################################
// main code
//###########################################################################
void main(void)
{
int counter=0; // binary counter for digital output

InitSysCtrl(); // Basic Core Init from DSP2833x_SysCtrl.c

EALLOW;
SysCtrlRegs.WDCR= 0x00AF; // Re-enable the watchdog
EDIS; // 0x00AF to NOT disable the Watchdog, Prescaler = 64

DINT; // Disable all interrupts

Gpio_select(); // GPIO9, GPIO11, GPIO34 and GPIO49 as output
// to 4 LEDs at Peripheral Explorer

Setup_ePWM1A(); // init of ePWM1A

Setup_ADC(); // initialize ADC channel A2

InitPieCtrl(); // basic setup of PIE table; from DSP2833x_PieCtrl.c

InitPieVectTable(); // default ISR's in PIE

EALLOW;
PieVectTable.TINT0 = &cpu_timer0_isr;
PieVectTable.ADCINT = &adc_isr;
EDIS;

InitCpuTimers(); // basic setup CPU Timer0, 1 and 2

ConfigCpuTimer(&CpuTimer0,150,20); // 50 kHz sample period

PieCtrlRegs.PIEIER1.bit.INTx7 = 1; // CPU -Timer 0
PieCtrlRegs.PIEIER1.bit.INTx6 = 1; // ADC

IER |=1;

EINT;
ERTM;

CpuTimer0Regs.TCR.bit.TSS = 0; // start timer0

while(1)
{
while(CpuTimer0.InterruptCount < 5000);
CpuTimer0.InterruptCount = 0;

EALLOW;
SysCtrlRegs.WDKEY = 0x55; // service WD #1
EDIS;

counter++;
if(counter&1) GpioDataRegs.GPASET.bit.GPIO9 = 1;
else GpioDataRegs.GPACLEAR.bit.GPIO9 = 1;
if(counter&2) GpioDataRegs.GPASET.bit.GPIO11 = 1;
else GpioDataRegs.GPACLEAR.bit.GPIO11 = 1;
if(counter&4) GpioDataRegs.GPBSET.bit.GPIO34 = 1;
else GpioDataRegs.GPBCLEAR.bit.GPIO34 = 1;
if(counter&8) GpioDataRegs.GPBSET.bit.GPIO49 = 1;
else GpioDataRegs.GPBCLEAR.bit.GPIO49 = 1;
}
}

void Gpio_select(void)
{
EALLOW;
GpioCtrlRegs.GPAMUX1.all = 0; // GPIO15 ... GPIO0 = General Puropse I/O
GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1; // ePWM1A active

GpioCtrlRegs.GPAMUX2.all = 0; // GPIO31 ... GPIO16 = General Purpose I/O
GpioCtrlRegs.GPBMUX1.all = 0; // GPIO47 ... GPIO32 = General Purpose I/O
GpioCtrlRegs.GPBMUX2.all = 0; // GPIO63 ... GPIO48 = General Purpose I/O
GpioCtrlRegs.GPCMUX1.all = 0; // GPIO79 ... GPIO64 = General Purpose I/O
GpioCtrlRegs.GPCMUX2.all = 0; // GPIO87 ... GPIO80 = General Purpose I/O

GpioCtrlRegs.GPADIR.all = 0;
GpioCtrlRegs.GPADIR.bit.GPIO9 = 1; // peripheral explorer: LED LD1 at GPIO9
GpioCtrlRegs.GPADIR.bit.GPIO11 = 1; // peripheral explorer: LED LD2 at GPIO11

GpioCtrlRegs.GPBDIR.all = 0; // GPIO63-32 as inputs
GpioCtrlRegs.GPBDIR.bit.GPIO34 = 1; // peripheral explorer: LED LD3 at GPIO34
GpioCtrlRegs.GPBDIR.bit.GPIO49 = 1; // peripheral explorer: LED LD4 at GPIO49

GpioCtrlRegs.GPCDIR.all = 0; // GPIO87-64 as inputs
EDIS;
}

void Setup_ePWM1A(void)
{
EPwm1Regs.TBCTL.bit.CLKDIV = 0; // CLKDIV = 1
EPwm1Regs.TBCTL.bit.HSPCLKDIV = 0; // HSPCLKDIV = 1
EPwm1Regs.TBCTL.bit.CTRMODE = 2; // up - down mode

EPwm1Regs.AQCTLA.all = 0x0060; // set ePWM1A on CMPA up
// clear ePWM1A on CMPA down

EPwm1Regs.TBPRD = 37500; // 2KHz - PWM signal
// TBPRD = fCPU / ( 2 * fPWM *CLKDIV * HSPCLKDIV)
// TBPRD = 150MHz / (2 * 2kHz * 1 *1)
// TBPRD = 37500
EPwm1Regs.CMPA.half.CMPA = 28125; // 25% duty cycle
// CMPA = (100% - duty cycle)*TBPRD
// CMPA = 0.75 * 37500 = 28125
}

interrupt void cpu_timer0_isr(void)
{
CpuTimer0.InterruptCount++;
AdcRegs.ADCTRL2.bit.SOC_SEQ1 = 1; // start ADC by software
EALLOW;
SysCtrlRegs.WDKEY = 0xAA; // service WD #2
EDIS;

PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

void Setup_ADC(void)
{
InitAdc();
// Configure ADC
AdcRegs.ADCTRL1.bit.SEQ_CASC = 1; // Cascaded Sequencer Mode
AdcRegs.ADCTRL1.bit.CONT_RUN = 0; // No Continuous run
AdcRegs.ADCTRL1.bit.CPS = 0; // prescaler = 1
AdcRegs.ADCTRL2.bit.EPWM_SOCA_SEQ1 = 0; // Disable EPWM_SOCA to start SEQ1
AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1; // Enable SEQ1 interrupt
AdcRegs.ADCTRL2.bit.INT_MOD_SEQ1 = 0; // with every EOS
AdcRegs.ADCTRL3.bit.ADCCLKPS = 3; // Divide HSPCLK by 6
AdcRegs.ADCMAXCONV.all = 0; // 1 Conversion per start
AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 2; // Setup ADCINA2 as input channel.
}

interrupt void adc_isr(void)
{
static Uint16 index=0; // index into ADC buffers
AdcBuf[index] = _IQmpy(AdcFsVoltage, _IQ16toIQ((_iq)AdcRegs.ADCRESULT0));

/*** Call the filter function ***/
xBuffer[0] = AdcBuf[index]; // Add the new entry to the delay chain
AdcBufFiltered[index] = IQssfir(xBuffer, coeffs, 5);

index++; // Increment the index
if(index == AdcBufLen) index = 0; // Rewind the pointer to beginning
// Reinitialize for next ADC sequence
AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1; // Reset SEQ1
AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1; // Clear INT SEQ1 bit
PieCtrlRegs.PIEACK.all = 1; // Acknowledge interrupt to PIE
}
//===========================================================================
// End of SourceCode.
//===========================================================================