Checkpoint

rawread/main.go

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+
+	"github.com/kylelemons/gousb/usb"
+	"github.com/kylelemons/gousb/usbid"
+)
+
+var (
+	device = flag.String("device", "vend:prod", "Device to which to connect")
+	config = flag.Int("config", 1, "Endpoint to which to connect")
+	iface = flag.Int("interface", 0, "Endpoint to which to connect")
+	setup = flag.Int("setup", 0, "Endpoint to which to connect")
+	endpoint = flag.Int("endpoint", 1, "Endpoint to which to connect")
+	debug = flag.Int("debug", 3, "Debug level for libusb")
+)
+
+func main() {
+	flag.Parse()
+
+	// Only one context should be needed for an application.  It should always be closed.
+	ctx := usb.NewContext()
+	defer ctx.Close()
+
+	ctx.Debug(*debug)
+
+	log.Printf("Scanning for device %q...", *device)
+
+	// ListDevices is used to find the devices to open.
+	devs, err := ctx.ListDevices(func(desc *usb.Descriptor) bool {
+		if fmt.Sprintf("%s:%s", desc.Vendor, desc.Product) != *device {
+			return false
+		}
+
+		// The usbid package can be used to print out human readable information.
+		fmt.Printf("  Protocol: %s\n", usbid.Classify(desc))
+
+		// The configurations can be examined from the Descriptor, though they can only
+		// be set once the device is opened.  All configuration references must be closed,
+		// to free up the memory in libusb.
+		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 _, alt := range cfg.Interfaces {
+				fmt.Printf("    --------------\n")
+				for _, iface := range alt.Setups {
+					fmt.Printf("    %s\n", iface)
+					fmt.Printf("      %s\n", usbid.Classify(iface))
+					for _, end := range iface.Endpoints {
+						fmt.Printf("      %s\n", end)
+					}
+				}
+			}
+			fmt.Printf("    --------------\n")
+		}
+
+		return true
+	})
+
+	// All Devices returned from ListDevices must be closed.
+	defer func() {
+		for _, d := range devs {
+			d.Close()
+		}
+	}()
+
+	// ListDevices can occaionally fail, so be sure to check its return value.
+	if err != nil {
+		log.Fatalf("list: %s", err)
+	}
+
+	if len(devs) == 0 {
+		log.Fatalf("no devices found")
+	}
+
+	dev := devs[0]
+
+	log.Printf("Connecting to endpoint...")
+	log.Printf("- %#v", dev.Descriptor)
+	ep, err := dev.OpenEndpoint(uint8(*config), uint8(*iface), uint8(*setup), uint8(*endpoint) | uint8(usb.ENDPOINT_DIR_IN))
+	if err != nil {
+		log.Fatalf("open: %s", err)
+	}
+	_ = ep
+}