ChibiOS Free Embedded RTOS

Posted: **Thu Feb 22, 2018 1:50 pm**

Hello!

I have a problem when switching pin modes. First, a pin is used as normal output (push/pull) and I can switch it without problems.

Then, the pin is reused as a PWM output, so it has to be changed to an alternate function pin like this:

Code: Select all

palSetLineMode(LINE_FPGA_INOUT0, PAL_MODE_ALTERNATE(2));

I get PWM output as expected. However, if I want to use the pin as normal push/pull output again, after using

Code: Select all

palSetLineMode(LINE_FPGA_INOUT0, PAL_MODE_OUTPUT_PUSHPULL);

I cannot switch the pin manually anymore. Am I missing something? Why can it not be switched back to a normal push/pull pin again?

Thanks in advance,
Adrian

Posted: **Thu Feb 22, 2018 2:15 pm**

Hi,

It should be possible to switch back, could you inspect the content of the related GPIO registers and see if the settings are those you would expect?

Giovanni

ChibiOS Free Embedded RTOS

STM32F7 - Switch from alternate function to normal pushpull

STM32F7 - Switch from alternate function to normal pushpull

Re: STM32F7 - Switch from alternate function to normal pushpull