OpenDPS

pinout

upgrade to opensource firmware

https://github.com/kanflo/opendps.git

dpavlin@nuc:/nuc$ git clone --recursive https://github.com/kanflo/opendps.git
dpavlin@nuc:/nuc$ cd opendps/
dpavlin@nuc:/nuc/opendps$ make -C libopencm3
dpavlin@nuc:/nuc/opendps$ make -C opendps

st-link

connecting rst pin to unpowered st-link stops dps5005 from booting

https://johan.kanflo.com/upgrading-your-dps5005/

pi@pihdmi:~ $ sudo openocd -f interface/stlink-v2.cfg -f target/stm32f1x.cfg
Open On-Chip Debugger 0.10.0+dev-01489-g06c7a53f1-dirty (2020-11-14-15:21)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
WARNING: interface/stlink-v2.cfg is deprecated, please switch to interface/stlink.cfg
Info : auto-selecting first available session transport "hla_swd". To override use 'transport select <transport>'.
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : clock speed 1000 kHz
Info : STLINK V2J28S7 (API v2) VID:PID 0483:3748
Info : Target voltage: 3.273018
Info : stm32f1x.cpu: hardware has 6 breakpoints, 4 watchpoints
Info : starting gdb server for stm32f1x.cpu on 3333
Info : Listening on port 3333 for gdb connections

from another terminal

pi@pihdmi:/nuc/opendps $ ./ocd-client.py all | tee 5V-off.txt

# exit openocd, turn output on

pi@pihdmi:/nuc/opendps $ ./ocd-client.py all | tee 5V-on.txt

client software

pi@pihdmi:/nuc/opendps $ pip3 install -r requirements.txt
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting crc16==0.1.1 (from -r requirements.txt (line 1))
  Downloading https://www.piwheels.org/simple/crc16/crc16-0.1.1-cp37-cp37m-linux_armv7l.whl
Requirement already satisfied: pyserial==3.4 in /usr/lib/python3/dist-packages (from -r requirements.txt (line 2)) (3.4)
Installing collected packages: crc16
Successfully installed crc16-0.1.1
pi@pihdmi:/nuc/opendps $ cd dpsctl/

pi@pihdmi:/nuc/opendps/dpsctl $ python3 ./dpsctl.py --device /dev/ttyUSB2 --ping
Error: timeout talking to device /dev/ttyUSB2.

# swap rx/tx pins

pi@pihdmi:/nuc/opendps/dpsctl $ python3 ./dpsctl.py --device /dev/ttyUSB2 --ping
Got pong from device

pi@pihdmi:/nuc/opendps/dpsctl $ python3 ./dpsctl.py --device /dev/ttyUSB2 --query
Func       : cv (on)
  voltage  : 5000
  current  : 1000
V_in       : 10.77 V
V_out      : 5.03 V
I_out      : 0.001 A
pi@pihdmi:/nuc/opendps/dpsctl $ python3 ./dpsctl.py --device /dev/ttyUSB2 -o off

pi@pihdmi:/nuc/opendps/dpsctl $ python3 ./dpsctl.py --device /dev/ttyUSB2 --query
Func       : cv (off)
  voltage  : 5000
  current  : 1000
V_in       : 10.78 V
V_out      : 1.73 V
I_out      : 0.001 A

pi@pihdmi:/nuc/opendps/dpsctl $ python3 ./dpsctl.py --device /dev/ttyUSB2 --query
Func       : cv (off)
  voltage  : 5000
  current  : 1000
V_in       : 10.78 V
V_out      : 0.01 V
I_out      : 0.000 A