controller_rpi.py 文件源码

def prepare_spi(self, spi): 
        if spi:            
            new_spi = Controller.Mock()

            def transfer(pin_ss, address, value = 0x00):        
                response = bytearray(1)

                pin_ss.low()
                response.append(spi.xfer2([address, value])[1])                
                pin_ss.high()

                return response

            new_spi.transfer = transfer
            new_spi.close = spi.close         
            return new_spi