waveshare-usb-can-a-go

Go binding for waveshare USB-CAN-A.

Waveshare USB-CAN-A Help

Demo:

package main

import (
    "flag"
    "fmt"

    "github.com/lion187chen/socketcan-go/canframe"
    wsucana "github.com/lion187chen/waveshare-usb-can-a-go"
)

var ucan *wsucana.UsbCanA

func main() {
    var port string
    flag.StringVar(&port, "port", "COM7", "WaveShare USB-CAN-A's virtual serial port name.")

    ucan = new(wsucana.UsbCanA)
    // Open() will create two goroutines, one for serial tx, another for serial rx.
    // bufSize is the rx and tx channelSize size.
    ucan.Open(port, 16)
    // Config the Waveshare USB-CAN-A device first.
    ucan.Config(wsucana.FRAME_CFG_BIT_RATE_100K, wsucana.FRAME_CFG_CAN_FRAME_EXT, wsucana.FRAME_CFG_WRK_MOD_NORMAL, wsucana.FRAME_CFG_REPEAT_NO)

    go Read(ucan)

    var aFrame canframe.Frame = canframe.Frame{
        ID:         0x20,
        Data:       []byte{0x01, 0x02, 0x03, 0x4, 0x05, 0x06, 0x07, 0x08},
        IsExtended: true,
        IsRemote:   false,
        IsError:    false,
    }
    // WriteFrame() will packa CAN frame to serial packate and send it to serial tx goroutine.
    ucan.WriteFrame(&aFrame)

    // Wait the serial tx and rx goroutines exited.
    ucan.WaitClose()
}

func Read(ucan *wsucana.UsbCanA) {
    rframe := <-ucan.GetReadChannel()
    fmt.Println(rframe)
    // Close() will stop serial tx and rx goroutines.
    ucan.Close()
}