spimatrixlednolib_initMax7219.go

func initMax7219() {
    writeMax7219(0x09, 0x00) // Decode mode register
    writeMax7219(0x0a, 0x03) //  medium brightness
    //    writeMax7219(0x0a,0x0f);// max brightness
    writeMax7219(0x0b, 0x07) // Scan limit register
    writeMax7219(0x0c, 0x01) // Shutdown register
    writeMax7219(0x0f, 0x00) // Display test register, normal mode
    //    writeMax7219(0x0f,0x01);// Display test register, test mode (light all leds)
}