CCS/LAUNCHXL-F28379D: how to define a variable on flash memory ?

Sms,

For questions 1 and 2 please see the F28379D workshop at:

https://training.ti.com/c2000-f2837xd-microcontroller-workshop

For question 3, in the Edit view under Target Configurations, select Launch Selected Configuration.  Then in the Debug view connect to the target.  Select Tools -> On-Chip Flash and proceed to Erase Flash.

I hope this helps. If this answers your question, please click the green "Verified Answer" button. Thanks.

- Ken

Thank you for helping,

But I don't know how to define a variable on flash memory.

I read workshop for launchxl-f28379d , but I don't know how to define a variable on flash memory.

Please explain more.

Thanks & regards.

Sms,

You cannot modify or change a variable in flash.  During run-time the code needs to be copied to RAM.  This is done with a memcpy() function.  In the workshop you will notice that this function is being used in the Lab 10 exercise in Main_10.c and Cla_10.c.  For an additional resource, see the following application report:

http://www.ti.com/lit/spra958

I hope this helps. If this answers your question, please click the green "Verified Answer" button. Thanks.

- Ken

Thank you for rsponse,

In fact I write the below code and receive a voltage from ADC (Analog to Digital Converter) and then save the result on adc0 (and adc1,adc2,adc3). when disconnect the board from laptop the result of ADC that save on adc0 (and adc1,adc2,adc3) removed. But I want to this variable not removed.

How to define this variable that not removed after disconnect the board from laptop ?

#include "F28x_Project.h"




uint16_t adc0[100],adc1[100],adc2[100],adc3[100];  // result of adc conversion
uint16_t i=0;

void configuretimer1 (void);
void configureADC (void);
interrupt void adca1_isr (void);
void main(void)
{
    InitSysCtrl();
    DINT;  // disable global interrupt
    InitPieCtrl();
//    IER = 0x0000;
//    IFR = 0x0000;
    InitPieVectTable();

    configureADC();
    configuretimer1();

    EALLOW;
    PieVectTable.ADCA1_INT = &adca1_isr;
    EDIS;
    PieCtrlRegs.PIECTRL.bit.ENPIE = 1;   // Enable the PIE block
    IER |= M_INT1; //Enable group 1 interrupts
    EINT;

    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
    PieCtrlRegs.PIEIER1.bit.INTx1 = 1;

    while(1);

}



void configuretimer1 (void)
{
    CpuTimer1Regs.TCR.bit.TIE = 1; // enable timer1 interrupt
    CpuTimer1Regs.TCR.bit.FREE = 1; // FREE:SOFT = 3 for free runs
    CpuTimer1Regs.TCR.bit.SOFT = 1;
    CpuTimer1Regs.TPRH.bit.TDDRH = 0; // TDDRH:TDDR = 9 ----> prescaler = 10
    CpuTimer1Regs.TPR.bit.TDDR = 9;
    CpuTimer1Regs.PRD.all = 100; // 5000 nsec = 5usec
    CpuTimer1Regs.TCR.bit.TSS = 0; // start counting
}

void configureADC (void)
{
    EALLOW;
    AdcaRegs.ADCCTL2.bit.PRESCALE = 6;    // ADCCLK = input clock/4
    AdcbRegs.ADCCTL2.bit.PRESCALE = 6;    // ADCCLK = input clock/4
    AdccRegs.ADCCTL2.bit.PRESCALE = 6;    // ADCCLK = input clock/4
    AdcdRegs.ADCCTL2.bit.PRESCALE = 6;    // ADCCLK = input clock/4

    AdcSetMode(ADC_ADCA, ADC_RESOLUTION_16BIT, ADC_SIGNALMODE_DIFFERENTIAL);
    AdcSetMode(ADC_ADCB, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
    AdcSetMode(ADC_ADCC, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);
    AdcSetMode(ADC_ADCD, ADC_RESOLUTION_12BIT, ADC_SIGNALMODE_SINGLE);

    AdcaRegs.ADCCTL1.bit.INTPULSEPOS = 1; //Interrupt pulse generation occurs at the end of the conversion
    AdcbRegs.ADCCTL1.bit.INTPULSEPOS = 1; //Interrupt pulse generation occurs at the end of the conversion
    AdccRegs.ADCCTL1.bit.INTPULSEPOS = 1; //Interrupt pulse generation occurs at the end of the conversion
    AdcdRegs.ADCCTL1.bit.INTPULSEPOS = 1; //Interrupt pulse generation occurs at the end of the conversion

    AdcaRegs.ADCCTL1.bit.ADCPWDNZ = 1;  // power on ADCA
    AdcbRegs.ADCCTL1.bit.ADCPWDNZ = 1;  // power on ADCB
    AdccRegs.ADCCTL1.bit.ADCPWDNZ = 1;  // power on ADCC
    AdcdRegs.ADCCTL1.bit.ADCPWDNZ = 1;  // power on ADCD

    DELAY_US(1000); //////////////////////delay for 1ms to allow ADC time to power up

    AdcaRegs.ADCSOC0CTL.bit.CHSEL = 2;  // SOC0 will convert ADCINA2 - ADCINA3
    AdcbRegs.ADCSOC0CTL.bit.CHSEL = 2;  // SOC0 will convert ADCINB2
    AdccRegs.ADCSOC0CTL.bit.CHSEL = 2;  // SOC0 will convert ADCINC2
    AdcdRegs.ADCSOC0CTL.bit.CHSEL = 2;  // SOC0 will convert ADCIND2

    AdcaRegs.ADCSOC0CTL.bit.ACQPS = 19; // acquisition window = 100 nsec
    AdcbRegs.ADCSOC0CTL.bit.ACQPS = 19; // acquisition window = 100 nsec
    AdccRegs.ADCSOC0CTL.bit.ACQPS = 19; // acquisition window = 100 nsec
    AdcdRegs.ADCSOC0CTL.bit.ACQPS = 19; // acquisition window = 100 nsec

    AdcaRegs.ADCSOC0CTL.bit.TRIGSEL = 2;
    AdcbRegs.ADCSOC0CTL.bit.TRIGSEL = 2;
    AdccRegs.ADCSOC0CTL.bit.TRIGSEL = 2;
    AdcdRegs.ADCSOC0CTL.bit.TRIGSEL = 2;

    AdcaRegs.ADCINTSEL1N2.bit.INT1SEL = 0;//end of SOC0 will set ADCINT1 flag

    AdcaRegs.ADCINTSEL1N2.bit.INT1E = 1;  //enable INT1 flag

    AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1;//make sure INT1 flag is cleared

    EDIS;
}


interrupt void adca1_isr (void)
{

    adc0[i] = AdcaResultRegs.ADCRESULT0;
    adc1[i] = AdcbResultRegs.ADCRESULT0;
    adc2[i] = AdccResultRegs.ADCRESULT0;
    adc3[i++] = AdcdResultRegs.ADCRESULT0;

    if (i == 100)
    {
        asm("  ESTOP0");
    }
    AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1;

    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;

}

I'm very sorry for elementary Questions. I'm a novice on DSP.

Thank you very much for helping.

All the best for you.