get_usb.go

package main

import (
    "fmt"
    "log"

    "github.com/google/gousb"
    "github.com/google/gousb/usbid"
)

func main() {
    ctx := gousb.NewContext()
    defer ctx.Close()


    ctx.Debug(3)

  // var thePrinter *usb.Device

    devs, err := ctx.OpenDevices(func(desc *gousb.DeviceDesc) bool {
        // The usbid package can be used to print out human readable information.
        // fmt.Printf("Port: %d\n", desc.Port)
        // fmt.Printf("Bus: %d\n", desc.Bus)
        // fmt.Printf("Address: %d\n", desc.Address)
        // fmt.Printf("Vendor: %s\n", desc.Vendor)
        // fmt.Printf("Product: %s\n", desc.Product)
        // fmt.Printf("Class: %s\n", desc.Class)
        // fmt.Printf("Describe: %s\n", usbid.Describe(desc))
        fmt.Printf("Classify: %s\n", usbid.Classify(desc))

        for _, cfg := range desc.Configs {
            // This loop just uses more of the built-in and usbid pretty printing to list
            // the USB devices.
            fmt.Printf("  %s:\n", cfg)
            for _, intf := range cfg.Interfaces {
                fmt.Printf("    --------------\n")
                for _, ifSetting := range intf.AltSettings {
                    fmt.Printf("    %s\n", ifSetting)
                    fmt.Printf("      %s\n", usbid.Classify(ifSetting))
                    for _, end := range ifSetting.Endpoints {
                        fmt.Printf("      %s\n", end)
                    }
                }
            }
            fmt.Printf("    --------------\n")
        }
        
        return false
    })

    defer func() {
        for _, d := range devs {
            d.Close()
        }
    }()

    // OpenDevices can occaionally fail, so be sure to check its return value.
    if err != nil {
        log.Fatalf("list: %s", err)
    }

    for _, dev := range devs {
        // Once the device has been selected from OpenDevices, it is opened
        // and can be interacted with.
        _ = dev
    }
}