Cross serial port UART pins

Matan Aloni

Other Parts Discussed in Thread: OMAP-L138

Hello,

I'm using LogicPD OMAP-L138 SOM-M1 with CCS5 to connect my PC to the board via serial port (uart).

I'm able to send and receive info from/to the board, but only when I cross pins number 2 and 3 of the 9-pin RS232 connector.

I verified that both my PC and the board use pin #2 for RX and pin #3 for TX, so connecting a serial cable between the two does not work, as they both send and receive on the same pin. I know there are crossover cables which cross these two pins, but I was wondering if there is any way to configure the board such that RX will be on pin #3 and TX on pin #2?

If not, is there any other way to connect my PC to the board without using a crossover cable?

Thanks in advance,

Matan

over 12 years ago

0 Pubesh over 12 years ago

TI__Mastermind 20790 points

Matan,

Thanks for your post.

Refer the Zoom Kit Quick Start Guide(QSG)
http://www.logicpd.com/products/system-on-modules/zoom-omap-l138-experimenter-kit//

Connect via Null-Modem Serial Cable:
Connect a null-modem serial cable (not supplied in the kit) to the serial port connector on the baseboard
and to an empty COM port on the your PC.

Open a new serial port connection using the COM port where the null-modem serial cable is connected
to the host PC. Set the ‘baud-rate’ to 115200, ‘data’ to 8-bit, ‘parity’ to none, ‘stop’ to 1-bit, and ‘flow control’ to none.

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Cross serial port UART pins