Pza Emulator for Tenma-72-2710 power supply

The main goals of this emulator are:

• to provide the exact same USB interface that the Tenma-72-2710 power supply.
• to run on a RaspberryPi Pico H to be cheap and easily integrated on a test bench.

Why not virtual USB interfaces ?

To have a solution independent from OS and their implementation specificities

Requirements

It does not have many requirements, so you might just clone the repo and run it. install the following package first.

sudo apt update
sudo apt install cmake gcc-arm-none-eabi libnewlib-arm-none-eabi  libstdc++-arm-none-eabi-newlib build-essential
pip install pyserial
pip install robotframework

Build the pico firmware

This project has a github actions workflow that build the Pico firmware.

Othewise the project can be build with the following commmand, the cmake may take a couple of minutes.

cd pico-firmware
mkdir build 
cd build
cmake ..
make -j8

flash the RaspberryPi Pico

Drag and drop the src/serial.uf2 on the Pico in bootsel mode, or use the following command:

cp src/serial.uf2 /media/<user>/RPI-RP2/

Run test

1. Using Robot script

Get the tty port of the pico in /dev, and set the variable ${PORT_NAME} of the file tenma-control/tenma.robot with the right port.

To lunch the tests run:

robot -d results/ tenma.robot

2. Using python script

Use the script tenma-control/tenma_72_2710 to test the pico firmware, you can use the same script to control the Tenma-72-2710 power supply.

Get the Tenma command help

tenma-control/tenma_72_2710.py -h

Get the Tenma model info

tenma-control/tenma_72_2710.py -v /dev/serial/by-id/usb-Nuvoton_USB_Virtual_COM_E6614C311B888B35-if00

Get the Tenma ON/OFF state

tenma-control/tenma_72_2710.py -s /dev/serial/by-id/usb-Nuvoton_USB_Virtual_COM_E6614C311B888B35-if00

Set the Tenma output to ON

tenma-control/tenma_72_2710.py --on /dev/serial/by-id/usb-Nuvoton_USB_Virtual_COM_E6614C311B888B35-if00

Set the Tenma output to OFF

tenma-control/tenma_72_2710.py --off /dev/serial/by-id/usb-Nuvoton_USB_Virtual_COM_E6614C311B888B35-if00

Set the Tenma Voltage (mV)

tenma-control/tenma_72_2710.py -sv 5000 /dev/serial/by-id/usb-Nuvoton_USB_Virtual_COM_E6614C311B888B35-if00

Get the Tenma Voltage (V)

tenma-control/tenma_72_2710.py -gv /dev/serial/by-id/usb-Nuvoton_USB_Virtual_COM_E6614C311B888B35-if00

Set the Tenma Current (mA)

tenma-control/tenma_72_2710.py -sc 3500 /dev/serial/by-id/usb-Nuvoton_USB_Virtual_COM_E6614C311B888B35-if00

Get the Tenma Current (A)

tenma-control/tenma_72_2710.py -gc /dev/serial/by-id/usb-Nuvoton_USB_Virtual_COM_E6614C311B888B35-if00