CBEX34, can't get to NB prompt

[mcoleNeptec]

I've made a mistake programming a CBEX34 by calling

Code: Select all

InitializeNetworkGDB()

before initializing the network stack.

The device would then not provide an IP address.
I've tried to use MTTY to reflash the device using the serial connection however while I get the expected message:
Waiting Xsec to start 'A' to abort about 2 seconds later I always get Initialized GDP tcp.
I can't seem to get to the NB prompt by pressing A. I've looked though other posts and tried holding down the A key before doing a hard reset with no difference. I also tried both a NULL and regular serial cable, which actually both display the same text.

Any help would be appreciated.

[pbreed]

the 'A' must be an 'A' not an 'a'

Also the fact that you get the same message with both null and normal serial cables says to me you have a
serial port problem....

[mcoleNeptec]

Thanks pbreed.

It turns out that my jumpers setting for UART0 RS-232 and UART1 RS-484 were interfering with something. When I changed the jumpers back to original settings (just UART0 RS-232 with JP3 set) I was able to get into the menu.

As for the weird cable effect, my unmarked cable which I though was a straight through cable, was actually also null modem cable.