AM263P4: STANDBY MODE

Sudhakar Elumalai Dhanasekar

Part Number: AM263P4

Hi,

I was executing a piece of code in below mentioned sequence

1) Blinking the LED for n Times
2) Executing __asm("WFI")

3) Blinking the LED for n Times

Actual Result:
Both step 1) & 3) are happening

Expected Result:
After 2) controller should go idle, and should not execute the step 3 until a interrupt is received.

In my case Controller is not going to STANDBY. Am I missing something here.

over 1 year ago

0 Ashwin Raj over 1 year ago

TI__Intellectual 2425 points

Hi Sudhakar,

Can you please share a snapshot of your code?

Regards,

Ashwin

0 Sudhakar Elumalai Dhanasekar over 1 year ago in reply to Ashwin Raj

Prodigy 195 points

Hello Ashwin,

Here the code snippet

Currently without debugger, I'm checking this.

Whether when debugger is connected also micro will go to sleep ?

0 Ashwin Raj over 1 year ago in reply to Sudhakar Elumalai Dhanasekar

TI__Intellectual 2425 points

Hi Sudhakar,

This seems to be happening because interrupts from RTI timer (for ClockP module) will be triggered every 1us which would cause the "WFI" instruction to exit.

Regards,

Ashwin

0 Sudhakar Elumalai Dhanasekar over 1 year ago in reply to Ashwin Raj

Prodigy 195 points

Should I need to disable all the interrupt before executing WFI instruction, where can I find interrupt related register details ?

+1 Ashwin Raj over 1 year ago in reply to Sudhakar Elumalai Dhanasekar

TI__Intellectual 2425 points

Yes, timer interrupt should be disabled. Below file has the interrupt numbers for each RTI instance.

"source/drivers/hw_include/am263px/cslr_intr_r5fss0_core0.h"

Below API can be used to disable interrupt-

HwiP_disableInt(#interrupt_number);

Regards,

Ashwin

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AM263P4: STANDBY MODE