[chirp_users] Options not in CHIRP (UV-5R series)
Does anybody know if it is likely to be possible to program options not available through the interface?
I have a pair of Baofeng GT-3TP (basically the UV-5R). I want to run 9600 baud packet over them and have found that in the RDA1846 chip: http://www.uv3r.com/images/Schematic-Baofeng-UV5R.pdf there is an option to turn off filtering and pre/de-emphasis. Set register 58 to 023B
My current option for doing this is to physically hack into the serial bus, insert a switching chip and use a raspberry pi to switch control away from the radio's onboard microcontroller chip to the raspberry pi serial GPIOs, program this option into the RDA1846 and then switch back control to the radio. Pretty heavy work for something that might be possible in software by programming the onboard controller (using CHIRP).
Any guidance very much appreciated.
Julian M1CWA
On Wed, Aug 5, 2015 at 10:13 AM, Julian Gough Julian.Gough@bristol.ac.uk wrote:
Does anybody know if it is likely to be possible to program options not available through the interface?
I have a pair of Baofeng GT-3TP (basically the UV-5R). I want to run 9600 baud packet over them and have found that in the RDA1846 chip: http://www.uv3r.com/images/Schematic-Baofeng-UV5R.pdf there is an option to turn off filtering and pre/de-emphasis. Set register 58 to 023B
My current option for doing this is to physically hack into the serial bus, insert a switching chip and use a raspberry pi to switch control away from the radio's onboard microcontroller chip to the raspberry pi serial GPIOs, program this option into the RDA1846 and then switch back control to the radio. Pretty heavy work for something that might be possible in software by programming the onboard controller (using CHIRP).
Any guidance very much appreciated.
Julian M1CWA
I don't know how CHIRP would do this unless the radio reads and writes this register to memory. If it does, and I doubt that is does, you would need to know which memory location this was.
You might not that the schematic that you referenced was made available in early 2012. It is know to have many mistakes. There is nothing on it that shows that it was made by Baofeng. And these radios have gone through a few generations since then.
You might contact Lior Elazary, KK6BWA. He is familiar with hacking the UV-5R and UV-B5.
elazary.com/index.php?option=com_content&view=article&id=49:hacking-the-baofeng-uv5r&catid=14:baofeng-uv5r&Itemid=17
Jim KC9HI
Thanks Jim,
What I don't know at all, and what I am hoping somebody here will have an idea about, is whether the MCU -which is what CHIRP reprograms- can possibly be persuaded to set the register in the RDA1846 using software so that I don't need to physically hack into the circuitry.
What I do know from the data sheet (and Lior's hacking for GMSK) is that there is a register in the RDA1846 (register 58) and that it can be set to 013B to toggle off filtering and pre/de-emphasis. This can be achieved in hardware by hacking into the serial communication with the RDA1846.
I'm already talking to Lior, and I've had the GT-3TP open and it's close enough to that schematic to follow what's going on by looking at the PCB in combination with data sheets for the chips (same RDA1846 anyway).
Julian M1CWA
On 5 August 2015 at 23:09, Jim Unroe rock.unroe@gmail.com wrote:
On Wed, Aug 5, 2015 at 10:13 AM, Julian Gough Julian.Gough@bristol.ac.uk wrote:
Does anybody know if it is likely to be possible to program options not available through the interface?
I have a pair of Baofeng GT-3TP (basically the UV-5R). I want to run 9600 baud packet over them and have found that in the RDA1846 chip: http://www.uv3r.com/images/Schematic-Baofeng-UV5R.pdf there is an option to turn off filtering and pre/de-emphasis. Set
register
58 to 023B
My current option for doing this is to physically hack into the serial
bus,
insert a switching chip and use a raspberry pi to switch control away
from
the radio's onboard microcontroller chip to the raspberry pi serial
GPIOs,
program this option into the RDA1846 and then switch back control to the radio. Pretty heavy work for something that might be possible in
software by
programming the onboard controller (using CHIRP).
Any guidance very much appreciated.
Julian M1CWA
I don't know how CHIRP would do this unless the radio reads and writes this register to memory. If it does, and I doubt that is does, you would need to know which memory location this was.
You might not that the schematic that you referenced was made available in early 2012. It is know to have many mistakes. There is nothing on it that shows that it was made by Baofeng. And these radios have gone through a few generations since then.
You might contact Lior Elazary, KK6BWA. He is familiar with hacking the UV-5R and UV-B5.
elazary.com/index.php?option=com_content&view=article&id=49:hacking-the-baofeng-uv5r&catid=14:baofeng-uv5r&Itemid=17
Jim KC9HI
participants (2)
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Jim Unroe -
Julian Gough