Writting to the device with libusb_interrupt_transfer(...), ends with LIBUSB_ERROR_IO all the time. Libusb version: libusb-1.0.4 STM32F103 code - st example for hid devices
Checked:
- Endpoint in code is set to as in lsusb : 0x81
- in usbmon I can see requests for descriptor etc. but when I trigger libusb_interrupt_transfer(...) there is no communication ( no log in usbmon )
- STM32 board never gets into specified interrupt endpoint
- Device handle used is proper
What would be next steps to track down the problem?
Here is lsusb output:
Bus 001 Device 005: ID 0483:5750 STMicroelectronics
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0483 STMicroelectronics
idProduct 0x5750
bcdDevice 2.00
iManufacturer 1 STMicroelectronics
iProduct 2 STM32 Custm HID
iSerial 3 8D8316685052
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 41
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 163
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 32
Device Status: 0x0001
Self Powered
