UNIV 3.1.3.1 firmware on 3.1.1.x hardware ?

[pheex]

Hi,

I have a 3.1.1.x black box button and i wish to set hysteresis more accurately (0.25C on 3.1.1.1 firmware, 0.0625 on 3.1.3.1)

Is it possible to flash 3.1.1.x box with 3.1.3.1 firmware ?

Or a simple code change in 3.1.1.0 to setup more precisely hysteresis ?

Thanks
pheex

[Jacek]

If you change code of the UNIV 3.1.1.1 firmware, you will not be able to set required hysteresis in HAPCAN Programmer. It might be better to change UNIV 3.1.3.1 firmware to match your hardware.
If you use UNIV 3.1.3.1 firmware on UNIV 3.1.1.x you need to change the code a bit, because the temperature sensor is connected to the other pin of the processor.
First of all this line - change 5 to 1 (temperature sensor is on pin1 of port B)
https://github.com/hapcan/UNIV_3.1.3.x/ ... 1.inc#L212

Then find code where button 14 (on pin RB1) is handled and remove it
https://github.com/hapcan/UNIV_3.1.3.x/ ... 1.asm#L399
https://github.com/hapcan/UNIV_3.1.3.x/ ... 1.asm#L685
https://github.com/hapcan/UNIV_3.1.3.x/ ... #L756-L757
https://github.com/hapcan/UNIV_3.1.3.x/ ... #L806-L808
Hopefully there are no more code lines to remove.

After that you need to build the project and convert hex file into haf file using HAPCAN Converter http://hapcan.com/devices/universal/uni ... er_3.1.exe

[pheex]

Thank you Jacek, i'll try this way.