STM32F107 ISOCHRONOUS IN

stefanofante9 · ‎2010-02-23

Posted on February 23, 2010 at 19:44

stefanofante9 · ‎2011-05-17

Posted on May 17, 2011 at 13:41

Any idea how to manage an isochornous EP in STM32F107 ?

niko2 · ‎2011-05-17

Posted on May 17, 2011 at 13:41

Isochronous IN EPs do not work in current OTG USB library. ST has promised that this will be fixed in future releases. I don't know the schedule for this.

I need isochr. IN EPs in my project too, but I also have so many other things to do that I haven't debugged ST usb otg code very much. Actually it has some other problems as, these have been discussed in another thread.

If ST fix comes before I start to work on usb code I'll use it, if not I'll just port some other free usb device stack for stm32f107.

stefanofante9 · ‎2011-05-17

Posted on May 17, 2011 at 13:41

I found in the last release of USB-FS firmware library a reference to an ISR handle to OTGD_FS_PTXFEmpty_ISR().

I didn't find any function in the otg libs with a similar name.

In the isr handle the for the gintr_status.b.ptxfempty is not called.

I saw that the OTGD_FS_PCD_EP_Write() function

don't raise the EP irq.

I tryed to modify the function but the doble buffering doen't works!

I'm in hurry with my project, if I find a solution I'll keep you informed

stream77 · ‎2011-05-17

Posted on May 17, 2011 at 13:41

Hi stefano,

I am working on the same chip (stm32F107VC) but I cannot do anything in this chip!!! I woud like to ask you if you have an example of GPIO configuration. I want to do a simple application to flash LEDs in my eval. board which is stm3210c.

Thank you in advance.

Regards,

Hal.

sangjin97 · ‎2011-05-17

Posted on May 17, 2011 at 13:41

Hi.guys~!

I'm developing USB applicaton using STM32F102C6.

I want to send data from STM chip to PC by isochronous mode.

I downloaded firmware program from wep site, named ''STM32_USB_FS_Device_Lib''.

I modify this code to send data. But it does not go into interrupt service rutine.

Is this a same problem?

If this is a same problem, I have more question.

The question is that, The Packet that i send, was correctly transmited to PC?

Please answer me. thank you :)

Tomas DRESLER · ‎2011-05-17

Posted on May 17, 2011 at 13:41

Do you have correct descriptors? If not, the PC will never ask for your data because it doesn't know you want to... USB is host-centric, and if the host doesn't ask, bad luck...

stefanofante9 · ‎2011-05-17

Posted on May 17, 2011 at 13:41

Yes I have the correct descriptors, (I made a similar stack for the STR912)

The problem is in the impementation of ST-USB libs.

At the moment I solved the problem sending data in bulk mode and a windows driver but I'd like to use a standard Windows Audio drivers for the final product.

I'm waiting to see the next release of USB libs :)

sangjin97 · ‎2011-05-17

Posted on May 17, 2011 at 13:41

Hi! stefano.

Did you make Windows driver?

You use WDM?

I have a same problem with you.(but i'm developing STM32F102C)

I can not use Isochronous now.

Please give me some hint. Thank you.

stefanofante9 · ‎2011-05-17

Posted on May 17, 2011 at 13:41

Dear Hyun,

Yes I use a WDM driver model.

For the windows drivers you need to download the Windows Drives Kit (WDK) is free.

There are a lot of sample, I'm using a customized version of the basic USB BULK sample driver. In the sample you can find also an application demo that use the driver.