TMS320F28069M: ePWM Generation

Hi,

Our expert will get back ASAP.

Thanks,

Saravanan

Hi Ayush,

Ayush Dixit said:

I am unable to generate the PWM Signals,

Are you using one of the software examples provided within our software development kit (C2000Ware SDK)?

C:\ti\c2000\C2000Ware_version\device_support\f2806x\examples\c28

If not, can you please try one of the epwm examples and see if with that you are able to generate a PWM output?

Best Regards,

Marlyn

Hello sir,

I am using the code from there only,

Please see my code..

Please correct me if i am wrong somewhere..

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

//
// Function Prototypes
//
void InitEPwm5Example(void);
__interrupt void epwm5_isr(void);
Uint32 EPwm5TimerIntCount;
Uint16 EPwm5_DB_Direction;
//
// 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. Initalize GPIO:
// This example function is found in the F2806x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
IER = 0x0000;
IFR = 0x0000;

// InitGpio(); // Skipped for this example

//
// For this case just init GPIO pins for ePWM1, ePWM2, ePWM3
// These functions are in the F2806x_EPwm.c file
//
InitEPwm5Gpio();

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

InitPieVectTable();

EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;
EDIS;

InitEPwm5Example();

EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;
GpioCtrlRegs.GPBMUX1.bit.GPIO39 = 0;
GpioCtrlRegs.GPBMUX1.bit.GPIO34 = 0;
GpioCtrlRegs.GPBDIR.bit.GPIO39 = 1;
GpioCtrlRegs.GPBDIR.bit.GPIO34 = 1;
GpioCtrlRegs.GPAMUX2.bit.GPIO16 = 0;
GpioCtrlRegs.GPADIR.bit.GPIO16 = 1;
EDIS;

GpioDataRegs.GPBDAT.bit.GPIO34 = 0;
GpioDataRegs.GPBDAT.bit.GPIO39 = 0;
GpioDataRegs.GPADAT.bit.GPIO16 = 1;
//
// Step 6. IDLE loop. Just sit and loop forever (optional)
//
for(;;)
{
__asm(" NOP");
}
}

//
// InitEPwm5Example -
//
void
InitEPwm5Example()
{
EPwm5Regs.TBPRD = 22500; // Set timer period
EPwm5Regs.TBPHS.half.TBPHS = 0x0000; // Phase is 0
EPwm5Regs.TBCTR = 0x0000; // Clear counter

//
// Setup TBCLK
//
EPwm5Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
EPwm5Regs.TBCTL.bit.PHSEN = TB_DISABLE; // Disable phase loading
EPwm5Regs.TBCTL.bit.HSPCLKDIV = TB_DIV4; // Clock ratio to SYSCLKOUT
EPwm5Regs.TBCTL.bit.CLKDIV = TB_DIV2;

EPwm5Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW; // Load registers every ZERO
EPwm5Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
EPwm5Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
EPwm5Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;

//
// Setup compare
//
EPwm5Regs.CMPA.half.CMPA = 11250;

//
// Set actions
//
EPwm5Regs.AQCTLA.bit.CAU = AQ_SET; // Set PWM1A on CAU
EPwm5Regs.AQCTLA.bit.CAD = AQ_CLEAR; // Clear PWM1A on CAD

EPwm5Regs.AQCTLB.bit.CAU = AQ_CLEAR; // Clear PWM1B on CAU
EPwm5Regs.AQCTLB.bit.CAD = AQ_SET; // Set PWM1B on CAD

//
// Active Low PWMs - Setup Deadband
//
EPwm5Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;
EPwm5Regs.DBCTL.bit.POLSEL = DB_ACTV_LO;
EPwm5Regs.DBCTL.bit.IN_MODE = DBA_ALL;
EPwm5Regs.DBRED = 200;
EPwm5Regs.DBFED = 200;

}

Thank you

//
// End of File
//

Hi Ayush,

What example is this? and what pins are you probing on the launchpad?

Best Regards,

Marlyn

Hello Sir,

It is f2806x_EPWM_deadband example from C2000ware,

I am directly probing on the pin no. 54 of microcontroller of the TAPAS Board.

Thank You

Ayush,

I am unaware of the TAPAS board, and cannot help support this board.

Do you have access to the signals from the F2806x device? 

Best Regards,

Marlyn