Tryanks/gousb
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Modify EndpointInfo to provide meaningful data rather than raw USB

Browse Source 
descriptor values. E.g. for the user, the distinction between
MaxIsoPkt and MaxPktSize is irrelevant, only the calculated max packet
size matters.
This commit is contained in:
Sebastian Zagrodzki
2017-04-08 23:49:10 +02:00
parent d982ef5a37
commit e0f30623b3
11 changed files with 195 additions and 141 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
usb/transfer.go
View File

@@ -112,23 +112,22 @@ func (t *usbTransfer) free() error {
// newUSBTransfer allocates a new transfer structure for communication with a
// given device/endpoint, with buf as the underlying transfer buffer.
func newUSBTransfer(dev *libusbDevHandle, ei EndpointInfo, buf []byte, timeout time.Duration) (*usbTransfer, error) {
func newUSBTransfer(dev *libusbDevHandle, ei *EndpointInfo, buf []byte, timeout time.Duration) (*usbTransfer, error) {
var isoPackets int
tt := ei.TransferType()
if tt == TransferTypeIsochronous {
isoPackets = len(buf) / int(ei.MaxIsoPacket)
if int(ei.MaxIsoPacket)*isoPackets < len(buf) {
if ei.TransferType == TransferTypeIsochronous {
isoPackets = len(buf) / int(ei.MaxPacketSize)
if int(ei.MaxPacketSize)*isoPackets < len(buf) {
isoPackets++
}
}
xfer, err := libusb.alloc(dev, ei.Address, tt, timeout, isoPackets, buf)
xfer, err := libusb.alloc(dev, ei, timeout, isoPackets, buf)
if err != nil {
return nil, err
}
if tt == TransferTypeIsochronous {
libusb.setIsoPacketLengths(xfer, ei.MaxIsoPacket)
if ei.TransferType == TransferTypeIsochronous {
libusb.setIsoPacketLengths(xfer, ei.MaxPacketSize)
}
t := &usbTransfer{