spimatrixledGO_max7219_main1.go

func main() {
    // stop channel is used to synchronize exiting the
    // program so that the board is reset to the state
    // it was in prior to the program starting.
    stop := make(chan interface{})
    // sigs is the channel used by Go's signals capability
    // to notify the program that a signal has been raised.
    sigs := make(chan os.Signal)

    // signal.Notify() registers the program's interest
    // in receiving signals and provides the channel used
    // to send signals to the program.
    signal.Notify(sigs, syscall.SIGINT, syscall.SIGKILL)
    go signalHandler(sigs, stop)

    // Initialize the rpio library
    if err := rpio.Open(); err != nil {
        fmt.Println(err)
        os.Exit(1)
    }