Arduino for STM32

Posted: **Sun Jan 31, 2021 1:58 pm**

fpiSTM wrote: ↑Sun Jan 31, 2021 1:51 pm Ahah! I've just remember why it does not work with USART1.
This is linked to the pin used: PA9/PA10.
On G0 those pins could be remapped on PA11/PA12.

https://github.com/stm32duino/Arduino_C ... ssues/1180

This will be fixed in the next core release. As a workaround, simply comments the code described here:
https://github.com/stm32duino/Arduino_C ... -696617262

I have connected the uart1 pins to PA9 and PA10:

: Capture.PNG (40.99 KiB) Viewed 3749 times

Posted: **Sun Jan 31, 2021 2:08 pm**

yes, that's why it doesn't work with the current version of the core you used. in fact the core remap to the pin 22/23.
So simply comment the code as mentioned in the GH issue and no remap will be done.

Posted: **Sun Jan 31, 2021 2:20 pm**

done,
thank you!

Posted: **Mon Feb 01, 2021 6:46 am**

fpiSTM wrote: ↑Sun Jan 31, 2021 2:08 pm yes, that's why it doesn't work with the current version of the core you used. in fact the core remap to the pin 22/23.
So simply comment the code as mentioned in the GH issue and no remap will be done.

thank you,
now I want to use spi,
I give 0xFF when want to read a register, I have checked by oscilloscope which the spi slave chip sends 0x11 but in the arduino give 0xff.
I have checked pinout and variant configs. but can't find the reason.

Posted: **Mon Feb 01, 2021 7:14 am**

By default SPI instance uses pin 11/12/13 respectively MISO/MOSI/SCLK.
So you have to check that they are properly define to use the same SPIx peripheral.
Pin 10 is used as SS by default.

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