谁用过libusb啊。。。啊、、、

hygnyf 2009-12-25 05:05:04

USB 可以打开了，usb_bulk_write也正常，可是usb_bulk_read的时候总是timeout 。

原因未知。谁用过的帮帮忙啊。

i:=usb_bulk_write(USBasp.handle,1,s,8,5000); //正常返回8

i:=usb_bulk_read(USBasp.handle,$81, r,64, 3000) ;//返回-116 tineout

用USBview得到的USB设备信息：

Device Descriptor:
bcdUSB: 0x0100
bDeviceClass: 0x00
bDeviceSubClass: 0x00
bDeviceProtocol: 0x00
bMaxPacketSize0: 0x08 (8)
idVendor: 0x1419
idProduct: 0x0130
bcdDevice: 0x0100
iManufacturer: 0x01
iProduct: 0x02
iSerialNumber: 0x03
bNumConfigurations: 0x01

ConnectionStatus: DeviceConnected
Current Config Value: 0x01
Device Bus Speed: Full
Device Address: 0x01
Open Pipes: 6

Endpoint Descriptor:
bEndpointAddress: 0x81
Transfer Type: Bulk
wMaxPacketSize: 0x0040 (64)
bInterval: 0x00

Endpoint Descriptor:
bEndpointAddress: 0x01
Transfer Type: Bulk
wMaxPacketSize: 0x0040 (64)
bInterval: 0x00

Endpoint Descriptor:
bEndpointAddress: 0x82
Transfer Type: Bulk
wMaxPacketSize: 0x0040 (64)
bInterval: 0x00

Endpoint Descriptor:
bEndpointAddress: 0x02
Transfer Type: Bulk
wMaxPacketSize: 0x0040 (64)
bInterval: 0x00

Endpoint Descriptor:
bEndpointAddress: 0x83
Transfer Type: Bulk
wMaxPacketSize: 0x0040 (64)
bInterval: 0x00

Endpoint Descriptor:
bEndpointAddress: 0x03
Transfer Type: Bulk
wMaxPacketSize: 0x0040 (64)
bInterval: 0x00

...全文