beagleboard UART connecting problem



Hai,



I am new to beagleboard,i try to connect my serial port in windows to see hyperterminal…but i didnt see any thing in terminal window…i dont know whats the problem…can anyone tell me what to do?what will the problem?







I selected



Bits per second :115200



Data bits :8



Parity :none



stop bits : 1



Flow control :none







After giving all this details i selected “apply” and “ok”…but i didnt get anything on my terminal window…help me

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See http://elinux.org/BeagleBoardFAQ#Serial_connection_.231. Do you get characters with pins 2 and 3 tied together on your cable? Do you see the “40T” or “40V” when you apply power?

i dont understand what you are coming to say is…because i am newbie…

what is meant by getting characters with pins 2 and 3 tied together on your cable?

i just connected my serial port to beagleboard which have 10 pins indicated as RS232 with thw connector…

what is meant by “40T” or “40V”?

i got 4 LED is on when connected to power supply…That is PWR,USR0,USR1,PMU STAT(near RS232 pin)

Still not getting anything when i connect to hyper terminal…

Main thing is i didnt have my MMC card…Just i connected the serial port connection and checking whether the board is working properly…but i didnt get anything in my hyper terminal window…help me

I also faced a similar problem in the begining, and its because there are 2
types of RS-232 headers available in the market, and they differ wrt the
pinout as shown.

Type 1 : 10 9 8 7 6
               1 2 3 4 5

Type 2 : 2 4 6 8 10
               1 3 5 7 9

The Beagle Board requires the Latter one (2). The one I purchased turned out
to be the other one (type 1), so it didn't work.

I just made my own RS-232 Header according to the Pin config described in
the SRM and it works well. Only pins 2 (TX), 3 (RX) & 5 (GND) are required
so its very simple.

You can check the Pin configuration of your available RS-232 Header with a
Multimeter and confirm if its according to the BeagleBoard Pinout. If you
find
the Pinout is OK, try using a reverser as well with your NULL Modem
Cable. Your NULL Modem Cable might be faulty.

-Nitin

Read section 13 of the Systems Reference Manual. http://beagleboard.org/static/BBSRM_latest.pdf
It takes you step by step to make sure you have all of the correct cables for the serial port. Pins 2 and 3 are the transmit and receive pins of a serial cable.

Gerald