Missing ''busy'' state handling in custom USB HID code generated by MX

[denis2]

Posted on May 16, 2017 at 12:51

I'm using STMCubeMX 4.21.0 to generate custom USB HID project. My device needs to send frequent HID reports, therefore it calls USBD_CUSTOM_HID_SendReport every 1-10ms.

This function always returns USBD_OK, even if previous report is not transmitted - in this case it just ignores new report.

It becomes a problem because there is no way for user code to check if data was successfully transmitted or another attempt is required.

I've implemented a local workaround in this function: it returns USBD_BUSY when hhid->state == CUSTOM_HID_BUSY

But this change is not in user modifiable area, therefore this change is lost on every project re-generation in CubeMX.

Am I missing something, is there any other good way to work around this issue?

#cubemx-usb-hid

[Imen.D]

Posted on May 17, 2017 at 14:02

Hi

Tyurin.Denis_Mikhail

,

Please attach your .ioc file.I shared thisissue internally with our CubeMx team for further check and investigation.

Thanks

Imen

[denis2]

Posted on May 17, 2017 at 14:14

Sure, here is the link to ioc file:

https://raw.githubusercontent.com/denis-m-tyurin/IRtoUSB/master/Firmware/IR_TO_USB/IR_TO_USB.ioc

[Zheng Liang]

Posted on October 25, 2017 at 13:59

This still exists in v4.1, my thought is smae with

HAMMI.Imen

‌, there need a busy state with return to check whether the data is transmitted

successfully.

[stm32cube-t]

Posted on February 23, 2018 at 18:53

Hello,

Please note this is not an STM32CubeMX issue but a USB device library issue. The fix will be available with the next version of the library, that is delivered as part of the STM32Cube MCU embedded software packages.

Best regards.

[Pavel A.]

Posted on February 24, 2018 at 02:18

I did this too for my device project on STM32F072.

-- pa