multi peripheral functionality on same pin

[ajie_dirgantara]

Is it possible to enabled multiple functionality on single pin by assigning definition on mpconfigboard.h, e.g like this (note that B10 and B11 can be used as uart OR i2c) :

mpconfigboard.h

#define MICROPY_HW_UART3_TX (pin_B10)
#define MICROPY_HW_UART3_RX (pin_B11)

#define MICROPY_HW_I2C2_SCL (pin_B10)
#define MICROPY_HW_I2C2_SDA (pin_B11)


and later on, in .py application, we called :

uart3 = pyb.UART(3, 9600)

an in some OTHERS application on different board with B10 and B11 assigned as i2c, we do :

i2c2 = pyb.I2C(2, pyb.I2C.MASTER)


The point is, I want to use single, unchanged micropython image, to support multiple hardware application.

[dhylands]

That should work fine.

You can use the pins_af.py from the build directory for your board, and the examples/pins.py file to print out the current settings of the alternate functions and verify that things are setup the way you think they are.

[TravisT]

Maybe I am not seeing it, but it seems like the CAN interface is one of the few that do not let me pass different pin assignments to, like SPI.

I looked up the pin alternative function from the REPL and both B13 and B5 do not show CAN as options, even though I know from the STM32CUBEMX and the DFU documentation say it is.

How would you go about doing this?

[TravisT]

Ignore that last post. I posted on the wrong topic, and have not yet found how I can delete a post.