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Original question:

TMS320F28335: Problem with the GPIO output

TMS320F28388D: Assistance Required with ISR Nesting and Priority Configuration

Eric Yuan
Prodigy 125 points

Part Number: TMS320F28388D

Tool/software:

Dear TI experts,

I have configured two ISRs: one for CPUtimer 1 and one for EPWM1. Since the EPWM1 ISR is from group 13 and CPUtimer 1 ISR is from group 3, I am wondering if the EPWM1 ISR will always respond first whenever both are triggered. I am looking to implement nesting, where the EPWM1 ISR can respond even while the CPUtimer 1 ISR is active. After the EPWM1 ISR completes, I want the CPUtimer 1 ISR to resume and complete its interrupted service. I believe this issue relates to interrupt priority and nesting. Could you assist me with this problem?

Best regards,

Eric