TMS320F28379D: USB example code question

Howard Zou

Part Number: TMS320F28379D
Other Parts Discussed in Thread: CONTROLSUITE

Hi,

my customer is testing USB module of 28379d control card, when he tests the bulk codes shown below, the board can communicate well with the computer. So the hardware should be fine.

D:\controlSUITE\controlSUITE\device_support\F2837xD\v210\F2837xD_common\tools\usb_bulk_example\Release\usb_bulk_example

but when he tests the example code below, the MCU can get message sent by the computer, but the computer cannot receive any message from the MCU.

D:\controlSUITE\controlSUITE\device_support\F2837xD\v210\F2837xD_examples_Cpu1\usb_dev_serial

It's impossible to rely on the scope to measure the signal on D+,D- because their will always be high frequency signals when they are not communicating.

Can anyone help on this case?

Another question is that do we have any example code for bootload from USB? The customer wants to download codes to MCU from USB.

Thank you.

over 8 years ago

0 Baskaran Chidambaram over 8 years ago

TI__Genius 17370 points

Hello,
I am writing to let you know that a C2000 team member has been assigned to this post and should be answering shortly.

Regards
Baskaran

0 Sal Pezzino over 8 years ago

TI__Mastermind 32995 points

Can you please test that your serial communication is working properly by running sci echoback example. The issue may be with your board.

sal

0 Howard Zou over 8 years ago in reply to Sal Pezzino

TI__Genius 12365 points

Hi, I don't think so because the bulk example is running correctly.

0 Sal Pezzino over 8 years ago in reply to Howard Zou

TI__Mastermind 32995 points

The bulk does not use the FTDI chip to mux SCI communication through the usb-mini connector.

Please check the SCI communication to your PC via sci echoback example.

sal

0 Howard Zou over 8 years ago in reply to Sal Pezzino

TI__Genius 12365 points

Thanks for you answer. We misunderstood about the code.
We thought that the code uses only the USB port, and when the computer send a word "10" to device, it will echo back "10" to the computer through the same USB port.
But actually it's using USB port and FTDI chip, I have to use two UARTASSIST on my computer to observe the communication.

0 Sal Pezzino over 8 years ago in reply to Howard Zou

TI__Mastermind 32995 points

Let us know if you have any other questions. If it is unrelated, please open a new thread.

sal

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TMS320F28379D: USB example code question