TMS320F28379S: GPIO20 and GPIO21 cannot be set, clear and doggle, data register has no response

What board are you using?

Hi Nima,

This is on a customer board.

Thanks,
Siby

Okay, here are somethings we need to check.
1. Since this is the single core version we don't need to check CPU ownership.
2. Check to see what the GPIO is connected to on the board. Possibly share that small section of the schem and board with me.
3. Make sure the pin is configured as GPIO and the direction is output (STD OUT).

Nima

Hi Nima,

Here is how the GPIO is connected from the output. The output is just sent to a buffer.

They have configured the GPIO as output. In fact, only those two GPIOs are having an issue right now, the other IOs work just fine. They are checking the code as well.

There was one error in the previous post, the device they are using is F28377S instead of F28379S.

Another issue they are running into right nw is that they have to directly jump GPIO72 and 84 to high and also using INK_FLASH.cmd when building the system. It seems like the software cannot boot to FLASH, it cannot restart after powering up. Any clues?

Okay I have an idea of what to test. Lets try EPWM output on GPIO20. Can you ask them to configure EPWM11 and see if the signal can come out of the  GPIO20 pin?

The mux configuration is below for EPWM11 on GPIO20.

Hi Nima,

EPWM worked.

Okay can they put these lines and single step and check to voltage?


GPIO_setPinConfig(GPIO_20_GPIO20);
GPIO_setPadConfig(20, GPIO_PIN_TYPE_STD);
GPIO_setDirectionMode(20, GPIO_DIR_MODE_OUT);
GPIO_writePin(20, 1);
ESTOP0;
GPIO_writePin(20, 0);
ESTOP0;
GPIO_writePin(20, 1);
ESTOP0;
GPIO_writePin(20, 0);

Did you try this?

Hi Nima,

EPWM works.

-Siby

Siby, did you try the code block above in your set tup to see if single stepping will toggle GPIO?

Siby any update on the GPIO issue?

Siby do you have any update on running the bit of code I sent you?