CCS/TMS320F28335: CAN communication and EPwm function for generating duty cycle

Tejal gole

Tool/software: Code Composer Studio

I am facing problem in ccs code. I have two codes one is generating PWM wave for the duty cycle of the converrter and second program is for CAN communication which sending current and voltage value to other DSP.

Both the programs independently run with proper output. but when I merged both programs then it is not generating duty cycle and not sending values to other DSP (i.e can is also not working).

is this problem is because I have used cputimer0 for both programs..plz help me for this

over 7 years ago

0 Joseph Casuga over 7 years ago

TI__Mastermind 43920 points

Hi Tejal,

It would seem like merging the codes caused the issue then. If you suspect that cputimer0 is causing the issue as this is common for both routines, can you use the other timers for the other application? Note that there are 3 available cputimers on the device.

Regards,
Joseph

0 Tejal gole over 7 years ago in reply to Joseph Casuga

Prodigy 230 points

can we use different ISR for EPWm and ECan with the same cputimer0?
PieVectTable.TINT0 = &cpu_timer0_isr //this is line i have used to generate Epwm as well as for ADC.so can i use the same line for CAN as well??
because In both the programs i have used above line.after combining those program in a single program, it is neither giving me duty pulse nor transmitting data.

0 Joseph Casuga over 7 years ago in reply to Tejal gole

TI__Mastermind 43920 points

Hi Tejal,

Using one ISR for both EPWM and ECAN will definitely cause you issues. Let EPWM use TINT0 and ECAN use either TINT1 or TINT2 for ECAN.

Regards,
Joseph

0 Joseph Casuga over 7 years ago in reply to Joseph Casuga

TI__Mastermind 43920 points

Hi Tejal,

Did not get a response from you regarding this issue so I am assuming you have found a solution. I'm marking this as thread as resolved but if you still have issues, please post it in the forum.

Best regards,
Joseph

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CCS/TMS320F28335: CAN communication and EPwm function for generating duty cycle