Problems with hardware handshake to TUSB3410

SteveH

Other Parts Discussed in Thread: TUSB3410

I'm using a TUSB3410 to interface between an MSP430 device and a PC running Win 7 x64. The PC application is coded in c# using the SerialPort class, 115200 baud, 8/N/1 and hardware handshake, raising the SerialPort.DataReceived event to get data. I am using the latest VCP drivers (3.3). What I am seeing is when transferring large quantities of data is that the RTS line from the TUSB3410 goes high to indicate that the input buffer is nearly full - but then the RTS line never goes low again to restart data transfer. So the data transfer process stalls and never gets going again. Can anyone explain why this is happening and how to fix it?

over 13 years ago

0 Roberto Diaz over 13 years ago

TI__Genius 11255 points

Hello Steve,

If your question is related to the use of these drivers with a MSP430 enabled Tool (such as the LaunchPad) Please contact the MSP430 team).

Regards,

Roberto.

0 SteveH over 13 years ago in reply to Roberto Diaz

Intellectual 490 points

Hello Roberto:

No, this is on a board of my own design, using the 3410 as a virtual com port, interfacing to the uart on an MSP430 (not on a tool like the launchpad). The RTS output from the 3410 is not behaving the way I would expect from the datasheet, and I don't understand why.

0 Roberto Diaz over 13 years ago in reply to SteveH

TI__Genius 11255 points

Steve,

Could you please provide us your schematic in order to perform a sanity check? So we are going to provide you te debug driver that you request in a few moments.

Regards,

Roberto.

0 SteveH over 13 years ago in reply to Roberto Diaz

Intellectual 490 points

I have attached the schematic - RTS is connected to P2.5 on an MSP430, configured as input, pullup not enabled. CTS is connected to P2.7 on the same MSP430, configured as output. The 3410 is working fine, except that I was getting overrun errors on the SerialPort. So I implemented the hardware handshake, but I only see RTS go high (which stops my output on the MSP430), but it never seems to go low again.

Bedside Schematic.pdf

0 SteveH over 13 years ago in reply to Roberto Diaz

Intellectual 490 points

I can't get the debug driver to install - I get a message "Driver is not intended for this platform" - have no idea where to go from here - I need to find out why the RTS line is not behaving as would be expected...

0 DHarmon over 13 years ago in reply to SteveH

TI__Genius 16430 points

This is being handled off-line via direct e-mail.

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Problems with hardware handshake to TUSB3410