Open source firmware

• https://github.com/stawel/cheali-charger
• https://groups.google.com/forum/#!forum/cheali-charger
• http://www.rcgroups.com/forums/showthread.php?t=1951734

Flashing

https://groups.google.com/forum/#!msg/cheali-charger/2Rz-dtwZ5Is/zUGr3PzX9bcJ

CHARGER -------------DONGLE
ICE_DATA <--------->    SWDIO
ICE_CLK  <--------->    SWCLK
ICE_RST  <--------->    RST (GND on my dongle)   
GND      <--------->    GND
VCC      <--------->     5V

dpavlin@x200:/rest/cvs/cheali-charger/src/hardware/nuvoton-M0517/targets/imaxB6-clone$ openocd -f /usr/share/openocd/scripts/interface/stlink-v2.cfg -f /usr/share/openocd/scripts/target/m051.cfg 
Open On-Chip Debugger 0.9.0 (2015-05-28-17:08)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 1000 kHz
adapter_nsrst_delay: 100
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : clock speed 950 kHz
Info : STLINK v2 JTAG v17 API v2 SWIM v4 VID 0x0483 PID 0x3748
Info : using stlink api v2
Info : Target voltage: 3.432000
Error: init mode failed (unable to connect to the target)
in procedure 'init' 
in procedure 'ocd_bouncer'

Serial port

• http://www.rcgroups.com/forums/showthread.php?t=1046318