2011-06-14, 22:55:04
I have not tried another baud rate. However, the same UART setup works perfectly with the RS-232 adapter. The only thing that's different is that I have a couple of I/O pins set to enable the RS-422 xceiver instead of the RS-232. In fact, I set it up to use the RS-422 port first and, while it's looking for a "hello" character, it also looks for a transition on the RS-232 xceiver. If it sees activity on the RS-232, it changes the I/O pins to enable the RS-232 xceiver. So everything from the point of view of the bootloader is the same for both interfaces.
What I think might be happening is that the RS-422 adapter may actually be reporting a framing error when it starts up. The dumb terminal program probably handles the error and continues. The GUI probably sees the error and aborts instead of clearing it and trying to continue.
John
What I think might be happening is that the RS-422 adapter may actually be reporting a framing error when it starts up. The dumb terminal program probably handles the error and continues. The GUI probably sees the error and aborts instead of clearing it and trying to continue.
John