I'm considering writing a new radio driver from scratch for older GE/Ericsson PCS radios. As usual, they have a proprietary, ancient dos-only program.
I was able to reverse engineer enough of the serial protocol to come up with these details:
http://pastebin.com/3jD6NESu
I'm reading over the example radio driver (
template.py), but I have a question on how to do multi-baudrate handshaking:
That is, this radio seems to require me to send a null-byte at 300 baud, then switch to 1200 baud for regular programming. The radio is unresponsive to anything unless I handshake/reset with this.
So question - is it possible to switch baudrates, and how could I approach this?
On a few side notes - a developer wiki page for basic getting started would be welcome, e.g., for programming a new driver, look at template.py and chirp_common.py.. This wasn't obvious and even then, some things arent fully explained. A wiki page outlining a high-level approach to writing a new driver would be awsome.
Also, was thinking it would be helpful to have a wiki page on techniques for reverse engineering radio programming protocols, such as using "serial port monitor" etc.
-Jens