unknown stack error

internal/temper/temper.go

@@ -0,0 +1,71 @@
+package temper
+
+import (
+	"fmt"
+
+	"github.com/google/gousb"
+)
+
+type TEMPer struct {
+	Device *gousb.Device
+}
+
+// GetDevice will return the first temper device found.
+func GetDevice() (*TEMPer, error) {
+	ctx := gousb.NewContext()
+	defer ctx.Close()
+
+	vid, pid := gousb.ID(0x0c45), gousb.ID(0x7401)
+	devs, err := ctx.OpenDevices(func(desc *gousb.DeviceDesc) bool {
+		return desc.Vendor == vid && desc.Product == pid
+	})
+
+	if err != nil {
+		return &TEMPer{}, err
+	}
+
+	if len(devs) == 0 {
+		return &TEMPer{}, fmt.Errorf("no devices found matching VID %s and PID %s", vid, pid)
+	}
+
+	devs[0].SetAutoDetach(true)
+
+	for i := 1; i <= len(devs)-1; i++ {
+		defer devs[i].Close()
+	}
+
+	return &TEMPer{Device: devs[0]}, nil
+}
+
+func (d *TEMPer) GetTemperature() (float64, error) {
+	cfg, err := d.Device.Config(1)
+	if err != nil {
+		return 0, err
+	}
+	defer cfg.Close()
+
+	intf, err := cfg.Interface(1, 0)
+	if err != nil {
+		return 0, err
+	}
+	defer intf.Close()
+
+	epIn, err := intf.InEndpoint(0x82)
+	if err != nil {
+		return 0, err
+	}
+
+	_, err = d.Device.Control(
+		0x21, 0x09, 0x0200, 0x01, []byte{0x01, 0x80, 0x33, 0x01, 0x00, 0x00, 0x00, 0x00},
+	)
+	if err != nil {
+		return 0, err
+	}
+
+	buf := make([]byte, 8)
+	if _, err = epIn.Read(buf); err != nil {
+		return 0, err
+	}
+
+	return float64(buf[2]) + float64(buf[3])/256, nil
+}