BULk out data and UART in control center at the same time

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BULk out data and UART in control center at the same time

E_521156
Level 4
Level 4
100 sign-ins 50 replies posted 50 sign-ins
‎Mar 08, 2021 07:40 AM
‎Mar 08, 2021 07:40 AM
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Hi,
I am sending stream data from the bulk endpoint to GPIF(BULK OUT). At the same time, I am sending/receiving data through UART (register mode) by Teraterm to FX3. Now I need to use Control Center(CC) to see whatever I got from Teraterm(stream data) or use CC to send TX data to Teraterm. I mean I want to change the firmware and maybe Visual C project somehow that Bulk OUT and UART traffic be able to send concurrently at the same time and can be accessible by Control Center. 

I am doing some research to find a good way to transfer UART data to CC without any corruption on Bulk out data and vise versa. Based on KBA92475(of course, it is for BULH IN), Bulk transfers are found to corrupt control endpoint data, causing errors in the control pipe.

So my question is that is there any suggestion for this goal? which kind of endpoints would be more reliable and helpful to transfer from/to UART to CC to avoid any corruption when I am using BULK out endpoint at the same time? Is there any example to help me on that?

Thanks

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Re: BULk out data and UART in control center at the same time

Rashi_Vatsa
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5 likes given 500 solutions authored 1000 replies posted
‎Mar 08, 2021 08:16 PM
‎Mar 08, 2021 08:16 PM
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Hello Elham,

From the description I understand that you need to send data from  USB to UART (BULK OUT) and also from UART to USB (BULK IN).

You can refer to UsbUart example of the SDK. Please note that the example  implementation adheres to the
CDC-ACM class and allows data communication from USB through to the UART port on the FX3 device. You would need to change the USB descriptors to Vendor Class descriptors so that the device can be accessed from Control Center.

 Based on KBA92475(of course, it is for BULH IN), Bulk transfers are found to corrupt control endpoint data, causing errors in the control pipe.

>> The issue mentioned in this KBA is only for USB 2.0 and is resolved in SDK 1.3.4

So my question is that is there any suggestion for this goal? which kind of endpoints would be more reliable and helpful to transfer from/to UART to CC to avoid any corruption when I am using BULK out endpoint at the same time?

>> You can use BULK endpoints as used in the USB UART example of the SDK

Regards,
Rashi

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