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Hello,
I'm a newbie in ARM and in Keil Microvision IDE. I downloaded an example from st site, which allows to communicate via serial port with an hyperterminal. I compile then download the program in the ARM7. When I am in debugging mode, I can see the program works properly thanks to serial window inside Microvision. But When I want to use hyperterminal on my PC to communicate with STR7, nothing happens...I take care of using correct settings for serial comm, same settings than in STR7.
Could you help me please?
Hi
If I understand it right the PC talks with the board very well by using Keil's µV.
Only Hyperterm won't work. I have had the same with LPC21xx-Board and found out the DTR line, which cause a RESET on the board, was wrong driven from hyperterm. A switch to disconnect the DTR at the sub works fine.
Check it out.
greets - Günter
I don't know how the LPCxxxx boards are set up, but a quick look at the STR7 schematic shows that the only lines connected from the DB9 connectors back to the RS-232 transceiver (for both ports) are TX and RX. The flow control pins are tied together.
All that said, I can't imagine how the DTR line could cause a reset unless there is a short on the board and the DTR line causes the processor to brownout and reset (a bit farfetched but little else makes sense).
uVision communicates with the ARM boards made by Keil thru the JTAG port. So the fact that uVision communicates with the board wouldn't/shouldn't have anything to do with the serial ports working with hyperterminal.
-=Rich=-
Hello
Now it's working!
My straight-thru cable, hand made, seems to have some shortcircuits...I did another one, and it's ok
Thanks to all for your help,
Bye