Mini2440 Hyperterminal readonly

Hi,

I have a Mini2440 board, I have hooked up the USB cable and the RS232 cable
to my computer.

For the serial connection I have used a  straight-through cable with on
both ends male connectors with converters to female to female.

I start hyper terminal and connect it with the following settings:

bits per second: 115200 
Data bits: 8
Parity: None
Stop bits: 1
Flow control: no

I start the board and I get the menu. But when I pres a key nothing
happens. No character appears in Hyperterminal no sign of response from the
board.

Can anyone tell me what I am doing wrong?

- Jaap

Hi Jaap (sounds dutch..)

Disconnect the serial cable at the side of mini2440. Make a short circuit
between pin 2 and 3. Start Hyperterminal and press any key. If it appears
on your screen, cable and comport from PC are OK.

Kind regards
Luc

Hi Luc,

Yes I am Dutch.

Thank you, but just to be sure, I should short the pins on the board or the
computer side?

- Jaap

Oops, did not read to good...

Hello Luc,

I got it it was the cable, I witched it with a regular male-female serial
cable and a converter at the male side.

Thanks!

Hi

I have bought micro2440 recently. i had faced the same problem with serial
port but it was responded with different characters for each key hitting. I
assumed that it was problem with rs232 transceiver chip, I have bypassed
the rs232 (ttl pins given on board) through another max232 chip (not on
board). Now i am getting exact response from serial port on the board. 

May be your board also having same problem with level transitions (rs232
levels).

thanks,
raj

Just had the same issue here. The solution, for me, was to turn off
hardware flow control in minicom. Had to hunt a bit: it's not in the comms
parameters but under "Configure minicom" then "Serial port setup".