<html><body><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:12pt"><div>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.</div><div>I was able to reverse engineer enough of the serial protocol to come up with these details:</div><div><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; border-spacing: 0px; font-size: 16px; ">http://pastebin.com/3jD6NESu</span><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: tahoma, 'new york', times, serif; background-color: transparent; font-style: normal; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; border-spacing: 0px; font-size: 16px; "><br></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: Helvetica; background-color: transparent;
font-style: normal; ">I'm reading over the example radio driver (template.py), but I have a question on how to do multi-baudrate handshaking:</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: Helvetica; background-color: transparent; font-style: normal; ">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.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: Helvetica; background-color: transparent; font-style: normal; "><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: Helvetica; background-color: transparent; font-style: normal; ">So question - is it possible to switch baudrates, and how could I approach this?</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: Helvetica; background-color: transparent; font-style: normal; "><br></div><div
style="color: rgb(0, 0, 0); font-size: 16px; font-family: Helvetica; background-color: transparent; font-style: normal; ">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.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: Helvetica; background-color: transparent; font-style: normal; ">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.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: Helvetica; background-color: transparent; font-style: normal; "><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: Helvetica;
background-color: transparent; font-style: normal; "><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: Helvetica; background-color: transparent; font-style: normal; ">-Jens</div></div></body></html>