cancel
Showing results for 
Search instead for 
Did you mean: 

USB Superspeed Peripherals

Taguchi
New Contributor

Hi,

I am testing UART communication operation with the sample USB-UART bridge (cyfxusbuart) that comes with the EZ-USB FX3 SDK 1.3.4.

Using Tera Term on a Windows PC, I was able to send and receive ASCII code without any problems.

However, the BREAK signal cannot be transmitted.

Similarly, using Tera Term, the BREAK signal can be transmitted with the FTDI FT4232H.

Therefore, I think that the setting of TeraTerm is not a problem.

Could you please teach me how to send a BREAK signal over the FX3's USB-UART bridge?

 

Best Regards,

Taguchi

 

 

0 Likes
1 Solution
AliAsgar
Moderator
Moderator

Hi Taguchi,

BREAK command comes with a bmRequestType 21h and bRequest 23h. Kindly handle the parsing of break character to the UART lines in the usbuart firmware in the FX3 SDK.

Best Regards,
AliAsgar

View solution in original post

0 Likes
4 Replies
AliAsgar
Moderator
Moderator

Hi Taguchi,

Could you please confirm what characters were seen on the FX3 UART Rx lines while issuing the BREAK signal?

Best Regards,
AliAsgar

0 Likes
Taguchi
New Contributor

Hi, AliAsgar

Thank you for your comment.

When I try to send a BREAK signal, the FX3's TX line stays at HIGH level and does not drop to LOW level.

RX also remains at HIGH level.

 

Best Regards,

Taguchi

0 Likes
AliAsgar
Moderator
Moderator

Hi Taguchi,

BREAK command comes with a bmRequestType 21h and bRequest 23h. Kindly handle the parsing of break character to the UART lines in the usbuart firmware in the FX3 SDK.

Best Regards,
AliAsgar

View solution in original post

0 Likes
Taguchi
New Contributor

Hi, AliAsgar

Thank you for your comment.
I checked the USBUART firmware code.
As the BREAK code processing was not written, I will try to add it.

Best Regards,
Taguchi

0 Likes