5.0 usb_cdc_pstn.c issue

johnstrohm — Wed, 21 Jan 2015 16:54:57 GMT

In the 5.0 USB stack, in file usb_cdc_pstn.c, in routine PSTN_Set_Ctrl_Line_State(), the code makes reference in various places to cdc_pstn_ptr->pstn_callback.callback.

This callback struct in fact contains the application callback (passed down from USB_Class_CDC_Init() through USB_Pstn_Init()).

Carrier state changes are passed to the application callback.

I think this may be incorrect. The application callback traditionally handles bus reset, enumeration complete, and USB error events, not fine-grained class-peculiar events. Fine-grained class-peculiar events are normally handled by the class-specific callback.

None of the example code shows a CDC application callback processing carrier state change events, so I cannot determine with any certainty whether this is actually an error or not.

Re: 5.0 usb_cdc_pstn.c issue

Kan_Li — Thu, 22 Jan 2015 07:43:33 GMT

Hi John,

Thanks for your reporting! I have just contacted the software team and they will fix it later.

Have a great day,
Kan

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topic 5.0 usb_cdc_pstn.c issue in Kinetis Microcontrollers

5.0 usb_cdc_pstn.c issue

Re: 5.0 usb_cdc_pstn.c issue