// +build feather_m4 feather_m4_can package main import ( "machine" ) func init() { spi = machine.SPI0 spi.Configure(machine.SPIConfig{ SCK: machine.SPI0_SCK_PIN, SDO: machine.SPI0_SDO_PIN, SDI: machine.SPI0_SDI_PIN, Frequency: 24000000, LSBFirst: false, Mode: 0, // phase=0, polarity=0 }) csPin = machine.D10 ledPin = machine.LED }