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Posted: Mon Mar 11, 2002 7:55 am
by skmcgee
I'm trying to figure out the messaging protocol used at the Bus(+) pin at the accessory connector located at the back of a CDM1250 radio. I have a little figured out, but have a long way to go. Any help or information would be appreciated. Thanks.
Posted: Mon Mar 11, 2002 7:10 pm
by Nand
Posted: Tue Mar 12, 2002 6:22 am
by skmcgee
Thanks for the reply. And I do have some figured out. For example, ramping up a channel (same as pressing the ^ arrow button) sends a message 0xF4 0x24 0x04 0x01 0x00 0xE2. I know the first byte lower nibble is message length (add 2). The 0x04 equates to that paricular button. The 0x01 is equivalent to a button press, and on the button release that changes to 0x00. Things like that. But there are still lots of things I'm guessing at.
Posted: Tue Mar 12, 2002 2:51 pm
by Nand
Posted: Wed Mar 13, 2002 3:55 am
by phantom
Welcome to the world of SB9600. I know of a company (can't remember the name) that actually uses the SB9600 protocol to perform all the functions of a radio (channel up, channel down, picking a channel, RSSI...) for something like MDT's or AVL's or the such. Sounds similar to what you're looking at...
Good luck!!!
PH