ChibiOS Free Embedded RTOS

Hi,
Had a rookie question about having multiple vcom ports using CDC. Can I combine the interrupt endpoints for 2 vcom ports to save an end-point?

thanks,
aQ

Hi,

Not sure, you should try and see how the host takes it.

The demo STM32F4xx-USB_CDC_IAD should allow to test it quickly in usbcfg.h.

Giovanni

Ok,
I was able to get 3 vitural com ports. Just for anyone who may need it
AQ

Hi,
Looks useful.
What host OS did you try this with?
--
Bob

FXCoder wrote:Hi,
Looks useful.
What host OS did you try this with?
--
Bob

Win10. I think also works with Win7. I remember testing with one of the PC that had Win7.

Thanks.
My experience with a config for 2 x VCP was that Win10, Mac and Linux were good. However, Win7 VCP driver only saw one com port.
I may try your single interrupt endpoint approach and see if Win7 behaves differently.
Care to post you usbcfg.c & .h ?

FXCoder wrote:Thanks.
My experience with a config for 2 x VCP was that Win10, Mac and Linux were good. However, Win7 VCP driver only saw one com port.
I may try your single interrupt endpoint approach and see if Win7 behaves differently.
Care to post you usbcfg.c & .h ?

Sure.
BTW, I have used two com ports with Win7 without any issues. My comment was for 3 com ports on Win7.
AQ

I could not attach files here. Webpage complained about invalid file formats. Ill try to send them through private msg.

Hi AQ,
Files retrieved OK.
FYI to post attachments on the forum use a zip.

I'll try out your configs later today on an F413 and see how I go getting additional VCPs, Win versus Win10 etc.

Thanks.
--
Bob