Changing SS Pin for SPI Bluetooth Communication

[Suzaken]

The bluetooth code that Wez made has the SPI protocol communicate using the Slave select as the B0 pin on the atmega32u4. Is there a way to change the Slave Select pin to a different I/O pin? This is the code. https://github.com/qmk/qmk_firmware/blob/master/tmk_core/protocol/lufa/adafruit_ble.cpp

[drashna]

Not sure if this would work (probably),
Add something like this to the top:

#ifndef AdafruitBleSSPin
#define AdafruitBleSSPin B0
#endif

And replace the call with:

    digitalWrite(AdafruitBleSSPin, PinLevelHigh);
    pinMode(AdafruitBleSSPin, PinDirectionOutput);

That should all it to work "normally" for the boards that use it, and should allow you to redefine the pin, if/when needed.

[Suzaken]

Thanks for the help. Tried that and it doesn't work. It's strange because that code already defines a chip select pin b4 so I don't really understand what it's using b0 for.

[drashna]

Unfortunately, that's about the extent of my expertise here. Sorry.

[fauxpark]

@Suzaken so the thing with the SS pin is it's required to initially be logic high for the AVRs to stay in SPI master mode, regardless of whether you're actually using it - B0 is left floating in the Feather schematic. The real slave select pin is in fact AdafruitBleCSPin.