Using the alternate SPI on stm32/blue pill

[chechu2k5]

I am presently looking to use a W5500 board with a stm32f103 based "Bluepill" development board.

While I am successfully able to use this library on the default SPI pins, I'd like to be able to use the second SPI bus available on this microcontroller.

• From what I can tell the SPIClass instance "SPI" is effectively hard coded as the first SPI (exposed on pins PA4/PA5/PA6/PA7).
• The second SPI I am interested in using is available on pins PB12/PB13/PB14/PB15 as can been seen in the second image above.
• Cursory reading of W5500.h/cpp indicates the use of the default SPI instance everywhere. Is there existing way or any plan to support the selection of a particular SPI instance within this library ?

Thanks

P.S. I couldn't find a way attach a "question label" to this issue ..

[sstaub]

You have to do some changes in W5500.h When you look to https://github.com/stm32duino/Arduino_Core_STM32/tree/master/libraries/SPI there is a possibility to use a constructor for using different SPIs. I think you have to call SPIClass::SPIClass(uint8_t mosi, uint8_t miso, uint8_t sclk, uint8_t ssel) ssel must be a hardware CS pin It is not planned to support different SPIs ports.

[chechu2k5]

Thank you for your quick response. I will investigate further based on your suggestion.