Posted on May 10, 2018 at 14:30I'm developing an HID USB Host application. I have already opened a discussion (
https://community.st.com/0D50X00009XkX0ASAV
) about HID USB Host and I applied all the suggested patches in forum, but now I have another problem.
When I try to send data to device (is a HID custom device that work fine if connected to PC) with SBH_HID_SetReport() function, it return 'USBH_BUSY' every time I try to send message.
The problem seems to be inside the USBH_HandleControl() function: the state machine reaches the 'CTRL_DATA_OUT_WAIT' state but, when it call USBH_LL_GetURBState(), return 'USBH_URB_STALL' status and than the USBH_HID_SetReport() function return 'USBH_BUSY'.
This is the code used to send data:
&sharpdefine MAX_USBDATASIZE (64)
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static uint8_t USBBufToSend[MAX_USBDATASIZE];
static uint16_t lenUSBBufToSend;
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USBH_StatusTypeDef res;
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res=USBH_HID_SetReport(&hUsbHostFS,0x02,0x00,USBBufToSend,lenUSBBufToSend);
Why the device state is 'USBH_URB_STALL'? Is it my mistake?
Is possible to resume the correct state?
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