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more comments. Rename USBError to just Error.

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This commit is contained in:
Sebastian Zagrodzki
2017-04-09 19:41:44 +02:00
parent 87c7a873e9
commit a5c4de3a29
3 changed files with 59 additions and 43 deletions
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25
usb/device.go
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@@ -21,10 +21,16 @@ import (
"time"
)
var DefaultReadTimeout = 1 * time.Second
var DefaultWriteTimeout = 1 * time.Second
var DefaultControlTimeout = 250 * time.Millisecond //5 * time.Second
var (
// DefaultReadTimeout controls the default timeout for IN endpoint transfers.
DefaultReadTimeout = 1 * time.Second
// DefaultWriteTimeout controls the default timeout for OUT endpoint transfers.
DefaultWriteTimeout = 1 * time.Second
// DefaultControlTimeout controls the default timeout for control transfers.
DefaultControlTimeout = 250 * time.Millisecond
)
// Device represents an opened USB device.
type Device struct {
handle *libusbDevHandle
@@ -56,10 +62,12 @@ func newDevice(handle *libusbDevHandle, desc *Descriptor) *Device {
return d
}
// Reset performs a USB port reset to reinitialize a device.
func (d *Device) Reset() error {
return libusb.reset(d.handle)
}
// Control sends a control request to the device.
func (d *Device) Control(rType, request uint8, val, idx uint16, data []byte) (int, error) {
return libusb.control(d.handle, d.ControlTimeout, rType, request, val, idx, data)
}
@@ -77,7 +85,7 @@ func (d *Device) SetConfig(cfg uint8) error {
return libusb.setConfig(d.handle, cfg)
}
// Close the device.
// Close closes the device.
func (d *Device) Close() error {
if d.handle == nil {
return fmt.Errorf("usb: double close on device")
@@ -92,6 +100,7 @@ func (d *Device) Close() error {
return nil
}
// OpenEndpoint prepares a device endpoint for data transfer.
func (d *Device) OpenEndpoint(epAddr, cfgNum, ifNum, setNum uint8) (*Endpoint, error) {
var cfg *ConfigInfo
for _, c := range d.Configs {
@@ -174,8 +183,12 @@ func (d *Device) OpenEndpoint(epAddr, cfgNum, ifNum, setNum uint8) (*Endpoint, e
return end, nil
}
func (d *Device) GetStringDescriptor(desc_index int) (string, error) {
return libusb.getStringDesc(d.handle, desc_index)
// GetStringDescriptor returns a device string descriptor with the given index
// number. The first supported language is always used and the returned
// descriptor string is converted to ASCII (non-ASCII characters are replaced
// with "?").
func (d *Device) GetStringDescriptor(descIndex int) (string, error) {
return libusb.getStringDesc(d.handle, descIndex)
}
// SetAutoDetach enables/disables libusb's automatic kernel driver detachment.