Posted on February 26, 2018 at 10:02Hi,
I am working on a nucleo STM32H7 and I am trying to communicate with a Hokuyo through USB.
When I connect the device the init fails at some point in the usbh_cdc.c (USBH_CDC_InterfaceInit)
In this function there is first:
interface = USBH_FindInterface(phost,
COMMUNICATION_INTERFACE_CLASS_CODE, //0x02
ABSTRACT_CONTROL_MODEL, //0x02
COMMON_AT_COMMAND); //0x01
then another one that fails:
interface = USBH_FindInterface(phost,
DATA_INTERFACE_CLASS_CODE,
RESERVED,
NO_CLASS_SPECIFIC_PROTOCOL_CODE);
Could someone explain to me why the second function is called with different parameters?
Can I change those parameters to match the device's Class?
Here is the log:
USB| USB Device Attached
USB| PID: 0h
USB| VID: 15d1h
USB| Address (&sharp1) assigned.
USB| Manufacturer : Hokuyo Data Flex for USB
USB| Product : URG-Series USB Driver
USB| Serial Number : N/A
USB| Enumeration done.
USB| This device has only 1 configuration.
USB| Default configuration set.
USB| Switching to Interface (&sharp0)
USB| Class : 2h
USB| SubClass : 2h
USB| Protocol : 1h
DEBUG: Cannot Find the interface for Data Interface Class.
USB| Device not supporting CDC class.
#usbh #stm32h7
