Anyone know what is changing in usb2serial program for stm32 in ecos

Anyone know what is changing in usb2serial program for stm32 in ecos

[GaurangT]

Dear,

        I am using usb stm32 drivers,When I am disable serial init
function,I got error like this,

Entering cyg_user_start() function
Usb2Ser: Thread starting
Error opening USB rx port
Ser2Usb: Thread starting
Error opening USB tx port

STM32 USB : Setting USB device address = 1
STM32 USB : Setting USB configuration = 1
ACM Class Handler
Get Line Coding
ACM Class Handler
*** Unhandled ACM Request: 0x22 ***
STM32 USB : Stall EP0 on UNKNOWN control message : 21 22 00 00 00 00 00 00




        What is change in usbs-serial and usb2serial code and cdl file.What
is meaning of this error.

Thanks,


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Re: Anyone know what is changing in usb2serial program for stm32 in ecos

[Chris Holgate]

GaurangT wrote:

>         I am using usb stm32 drivers,When I am disable serial init
> function,I got error like this,

Umm - I don't think you want to disable the entire function - there are
some semaphore initialisations in there.

> STM32 USB : Setting USB device address = 1
> STM32 USB : Setting USB configuration = 1
> ACM Class Handler
> Get Line Coding
> ACM Class Handler
> *** Unhandled ACM Request: 0x22 ***
> STM32 USB : Stall EP0 on UNKNOWN control message : 21 22 00 00 00 00 00 00
> 
>         What is change in usbs-serial and usb2serial code and cdl file.What
> is meaning of this error.

It looks like a class specific EP0 control message is not being handled
by the class driver.  The handler function is attached using the
following code:

#ifdef CYGDAT_IO_USB_SLAVE_CLASS_TYPE_ACM
  if (!usbs_serial_ep0->class_control_fn)
    usbs_serial_ep0->class_control_fn = usbs_serial_acm_class_handler;
#endif

So CYGDAT_IO_USB_SLAVE_CLASS_TYPE_ACM needs to be set to attach the
handler correctly - is this the case for your build?

Chris.