Problem with SdFat and TwoWire instance. about sdfat HOT 3 CLOSED

It appears there is some collision between I2C2 pins PB11 SDA, PB10 SCL, and SdFat. When I use I2C1 PB8 SCL and PB9 SDA, it writes to SD correctly. One more interesting fact is that it fails to write only when the MCU successfully gets data from BMP280 on I2C2. But I really have to use I2C2 for the BMP.

from sdfat.

I have never mapped pins on a Bluepill and don't have one so I can't try anything or help.

If you map SPI pins with SdFat, you may need to call SPI.begin(<args>) before sd.begin() if any arguments are required in the SPI.begin() call.

Add USER_SPI_BEGIN to this definition like this:

#define SD1_CONFIG SdSpiConfig(SD_CS_PIN, USER_SPI_BEGIN | DEDICATED_SPI, SD_SCK_MHZ(18), &sdSPI)

If this fails, try the stm32duino forum for help.

Edit: SdFat never calls any SPI function with pin number arguments. SdFat only calls SPI.begin() with no arguments, SPI.beginTransaction(), SPI.transfer(), SPI.endTransaction() and possibly SPI.end() if sd.end() is called

from sdfat.

I see... It appears to be a STM32 core problem. I managed to remap default I2C pins. It writes now.

Thanks

from sdfat.