MON390: SERIAL0 CANT BE USED FOR MON390 ON DALLAS TINI M400

Information in this article applies to:

• C51 Version 7.xx

PROBLEM

When I change the MON390 configuration for the Dallas TINI-m400 board (..\C51\MON390\Tinim400\) to use the Serial 0 interface, µVision will not connect. The Serial 0 works fine with JavaKit or Dallas MTK. I have proven the baudrate with the µVision simulation.

CAUSE

The MON390 driver toggles DTR on the RS232 interface on connect. The DTR line is used to reset the controller on the TINI-m400. Every time you try to connect to the monitor this will stop the MON390 firmware and start the TINI bootloader.

SOLUTION

Attached to this article you will find a new version of MON390.dll. Download this file and configure your project as follows:

1. Download the file and unpack it into ..\C51\BIN\.
2. Start µVision; open Options for Target - Debug - Settings.
3. Enable Ignore Handshake Lines.

The lines DTR and RTS will not be toggled with this option enabled.

SEE ALSO

• MON390: DOWNLOADING MON390 INTO THE TINI BOARD USING MDK
• µVision DEBUGGER: DALLAS 400 SIMULATION
• ISD51: DOES ISD51 WORK WITH THE DALLAS 390, 5240, OR 400?
• MON390: CANNOT CONNECT TO DALLAS TINI 400'S SERIAL PORT 0

ATTACHED FILES

Request the files attached to this knowledgebase article.

Last Reviewed: Tuesday, June 07, 2005