supercaly/hexiwear-handwash

Repository for the Hexiwear hand wash project.

Hexiwear hand wash

Repository for the Hexiwear hand wash project.

Get Started

This project is based on mbed OS 6, to use it you need the mbed cli 2 compiler toolchain. Follow this instructions to install it.

Mbed CLI needs Git to download the dependencies, so you’ll also need to install it. This project uses by default the GCC_ARM compiler, so you need to install it too.

To compile and flash the program run this command

$ mbed-tools compile -t GCC_ARM -m HEXIWEAR -f

To build C/C++ code for the ARM processor using the GCC_ARM compile you need the gcc-arm-embedded toolchain. Install it on macos with homebrew:

$ brew install --cask gcc-arm-embedded

Program the KW40Z

Tho have access to the Bluetooth Low Energy and the buttons of the Hexiwear you need to flash the KW40Z binary file downloadable here. After you have downloaded the .bin file set the switch in the docking station to 00111111 and copy the file to the mounted device to flash it.

Read Hexiwear output

The program can print some logs to his standard output, to read those you need to establish a serial connection to the device.

The default method is using the mbed cli 2 by appending -s/--stream to the end of the mbed-tools compile command.

Another method is using an external program, the suggested one is picocom

$ picocom --imap lfcrlf /dev/serial/device

hexiwear-handwash's Issues

Move menu pages inside pages folder

Include raw values in recorded/exported data

Move common headers outside of app1

When exporting each line is the same

Add mutex to data recorder

Use a mutex inside data_recorder to ensure that each call to record_data is done ina thread-safe manner

Export data in a new thread

In data_exporter spawn a new thread to do the exporting and make it thread-safe to ensure multiple calls don't go through at the same time

Make wrist selection a global variable

Use sub CMakeLists for each src subfolder

Export data to uSD as plain text

When we export the recorded data to the uSD card don't simply flush binary data, but convert it to plain text before.

Speed-up menu transitions

Extend the logger

Extend the logger creating a logger class in a way similar to this and this

Draw menu triangle dynamically depending on the menu

The menu items have two triangles pointing to the buttons for moving up/down to other siblings' elements. Draw those triangles separately from the element and depending on the element position, so if it's the first the top triangle will not be drawn and if it's the last the bottom will be left out.

Test exporting large recordings

Test what happens if we try to export a large recording that cannot fit all in memory

Move model folder outside of app1