newest fork: https://github.com/swegener/b3603

https://hackaday.io/project/4362-power-supply-b3603-alternative-firmware

• http://www.eevblog.com/forum/reviews/b3603-dcdc-buck-converter-mini-review-and-how-the-set-key-could-be-fatal/
• https://github.com/baruch/b3603
• http://www.banggood.com/DC-LED-Digital-Controlled-Step-Down-Driver-Power-Module-p-910096.html

Specification

Input voltage: 6V ~ 40V
Output voltage: 0V ~ 36V
Output current: 0A ~ 3A
Conversion efficiency: up to 92%
The output ripple: ≤50mV
Working temperature: -40°C ~ +85°C
Working frequency: 150KHz
Short circuit protection: constant current
Voltage regulation/display resolution: 0.01V
Current regulation/display resolution: 0.001A
The minimum display resolution of power: 0.001W
The minimum display resolution of capacity: 0.001AH
Input reverse connect protection: no, if necessary please install diode
Connection mode: terminals
Size: 66 x 50 x 21mm
Weight: 44g

unprotect stm8 using stm8flash

https://github.com/vdudouyt/stm8flash/issues/38#issuecomment-195123081

$ echo "00" | xxd -r -p >ROP_CLEAR.bin
$ stm8flash -c stlinkv2 -p stm8s103f3 -s opt -w ROP_CLEAR.bin 

compile

pi@rpi2 ~ $ git clone https://github.com/swegener/b3603
Cloning into 'b3603'...
remote: Counting objects: 1109, done.
remote: Total 1109 (delta 0), reused 0 (delta 0), pack-reus
Receiving objects: 100% (1109/1109), 11.04 MiB | 2.90 MiB/s
Resolving deltas: 100% (770/770), done.
Checking connectivity... done.


pi@rpi2 ~/b3603/stm8 $ sudo apt-get install sdcc


pi@rpi2 ~/b3603/stm8 $ make

Code fits the flash, it is 7930

dpavlin@nuc:/nuc/b3603/stm8$ uname -a
Linux nuc 4.4.0-1-amd64 #1 SMP Debian 4.4.6-1 (2016-03-17) x86_64 GNU/Linux
dpavlin@nuc:/nuc/b3603/stm8$ sdcc -v
SDCC : mcs51/z80/z180/r2k/r3ka/gbz80/tlcs90/ds390/TININative/ds400/hc08/s08/stm8 3.5.0 #9253 (Mar 21 2016) (Linux)
published under GNU General Public License (GPL)

dpavlin@nuc:/nuc/b3603/stm8$ scp b3603.ihx rpi2:stm8flash/