AM2432: Setting GPIO in Interrupt Routine not possible

Andreas Zeiler

Part Number: AM2432

Hi,

I'm trying to set an GPIO in a normal Code and reset this GPIO in an Interrupt Routine.

But this is not possible. I checked with an colleague the GPIO Registers and they have been set or reset. But I do not see anything on oscilloscope.

I double checked GPIO in normal Code (which runs in a Task) by toggle it. This worked without any problems.

Why it is not possible to set/reset GPIOs in ISR?

Regards

Andreas

over 3 years ago

0 Frank Livingston over 3 years ago

TI__Mastermind 29348 points

Hi Andreas,

I created a simple FreeRTOS example which toggles GPIO0_62 in a Timer ISR. I was able to observe the expected toggle 1 kHz frequency on a logic analyzer:

I've attached the example code for your inspection. I'm using AM243x MCU+SDK 08.02.00.12, which is available here: https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/08_02_00_12/index_FDS.html

Are there any differences between the example and what you're trying to do in your code?

Regards,
Frank

empty_am243x-evm_r5fss0-0_nortos_ti-arm-clang.zip

+1 Andreas Zeiler over 3 years ago in reply to Frank Livingston

Intellectual 600 points

I noticed that I compiled for AM64xx but run the firmware on AM24xx. At this moment I have no possibility to compiler for am24.

Issue closed. Thanks anyway

0 Andreas Zeiler over 3 years ago in reply to Frank Livingston

Intellectual 600 points

Hi,

I checked your Example and it is nearly the same I'm doing too. My ISR just gets called by ADC.

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AM2432: Setting GPIO in Interrupt Routine not possible