386 lines
20 KiB
Markdown
386 lines
20 KiB
Markdown
# W800_Smart_Watch
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## Why this project :
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I was interested in working on a bigger project with more challenges and which could be useful.
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I am also quite unhappy with the smartwatches that are on the market (expensive, no access to the firmware, data collection and privacy issues), that's why I decided to try doing my own that I can fully customize. This is going to be a long adventure with a lot of discoveries along the way :).
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I also wanted to test this W800 SOC more deeply and see what it could do and I think it is a perfect fit for the project.
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So let's go !
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# Update : the release firmware is stable and usable for everyday use.
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## A Smart Watch project using the Chinese W800 SOC.
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The W800 is a pretty interesting chip with impressive characteristics for its price (around 1$) :
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### Core :
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* 32bit XT804 CPU
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* 240 MHz max clock
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### Memory :
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* 2 MB on chip flash
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* 288 KB RAM, ~130 KB available to the user
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### Wireless connectivity :
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* Bluetooth EDR(Classic) and BLE 4.2
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* WiFi 2.4Ghz 802.11 b/g/n
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### SDK & OS
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* FreeRTOS v10.4.1
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* BLE stack : NimBLE
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* TCP IP stack : lwip v2.1.3
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## W800 Smart Watch V1 specifications :
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#### Sensors :
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* A magnetometer (QMC5883L) used by the compass app for example
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* An accelerometer (BMA456) to get wrist tilt detection (to wake the screen up), step counts, activity detection (standing, walking and running) and more.
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* A pressure and temperature sensor (BMP280) used by the altimeter app for example.
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* A heart rate sensor (MAX30102).
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#### Screen and Actuators :
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* A 1.28 inch touch screen is being used on the watch (GC9A01 screen controller).
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* A vibration motor to notify the user of events.
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* No physical buttons as everything can be done using the graphical interface.
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#### Connectivity :
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* The watch has BLE (4.2) connectivity which is used to connect to a phone using the GadgetBridge app (**use version 0.73.0, commit : 4f3472565**) to :
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* Control music playback
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* Find my phone feature
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* Report its battery level
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* Report step counts - **to implement**
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* Display received text messages, emails and calls - **to implement**
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* Show the weather forecast for the next 6 hours or so - **to implement**
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* WiFi is also available but not used yet because I didn't find any good use case for it. It is also quite power hungry.
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#### Battery and Battery life:
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* The battery currently used in this version of the watch is a 6mm x 25mm x 35mm (602535) single cell 600 mAh lipo battery (had one laying around).
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* Using the current battery, expected battery life is :
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* ~ 5 days in sleep mode.
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* ~ 9 hours when continuously connected to BLE with the phone (I may be able to slightly improve power consumption in BLE mode - working on it).
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#### Casing size, Weight and Docking station :
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* The case of the watch is 3D printed and the STL design files are available [here](design/FreeCad/stl)
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* The size of the watch's case is as follow :
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* The thickness of the watch will be reworked in the next version of the casing, the goal is to shave 3 to 4 mm off to reach 12 to 13 mm.
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* The watch weighs around 50 grams with the 600 mAh battery and the straps attached to it.
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* It also has a docking station designed for it which is used to :
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* Recharge the W800 Smart Watch by simply putting the watch on it. The connection between the docking and the watch is done through a magnetic 4 pin connector.
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* Flash a new firmware to the watch. No extra programming hardware is required, only the docking is needed.
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## Getting started :
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### So, you'd like to try this project yourself ?
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### Here are the steps to follow, in order to build the firmware and flash the board :
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#### **On Windows :**
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1) Start by cloning this repository.
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**Put it in a path that doesn't contain any spaces** ie : "C:\Users\Bob\Desktop\projects" for example.
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2) Once cloning is done, you will need to install the [MSYS2](https://www.msys2.org/) tool/environment. This tool is needed to compile the project using **Make**.
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3) Open a terminal by clicking on the **MSYS2** icon and execute the following commands to prepare the environment :
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1) Update packages :
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```bash
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pacman -Syu
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```
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2) Install make :
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```bash
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pacman -S msys/make
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```
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3) Install automake :
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```bash
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pacman -S msys/automake
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```
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4) Install autoconf :
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```bash
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pacman -S msys/autoconf
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```
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5) Install gcc :
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```bash
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pacman -S msys/gcc
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```
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6) Install git :
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```bash
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pacman -S msys/git
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```
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7) Install utils needed for menuconfig :
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```bash
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pacman -S msys/ncurses-devel
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pacman -S msys/gettext-devel
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```
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4) You now, need to download the toolchain required to compile and link the app [here](http://82.157.145.101/download/toolkits/winnermicro/w806/csky-elfabiv2-tools-mingw-minilibc-20210423.tar.gz) and extract it somewhere you remember on your hardrive.
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5) Now, go back to the MSYS terminal window and move to the **src/W800_SDK_v1.00.10/** directory which is located in the cloned repository, using the **cd** command.
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6) Then, execute the **make menuconfig** command, this should greet you with a crude configuration window.
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Move to the **Toolchain Configuration -->** option using the arrows and hit enter.
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Using the same controls, move to the **toolchain path** and **set the location** to where you extracted the toolchain in step 4.
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7) To be able to flash the board, you will also need to set the used com port in the **Download Configuration --->** option.
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**TIPS : set the download rate to : 2000000**, this should speed up the flashing process.
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8) Now save your configuration and exit.
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9) Finally, type :
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```bash
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#This will remove all builded object to start from a clean environment (Needed only once)
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make distclean
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#This will only compile the library part of the firmware
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make lib
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#This will compile the actual firmware using the libraries and produce the .bin file
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make
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#This will flash the board using the previously generated .bin file
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make down
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#This will do both previous commands in one (build and flash)
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make flash
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```
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## Regenerating LVGL builtin fonts (to add special characters for example) :
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### If you need to modify the font by changing the default one or need to add missing characters or symbols, you'll have to install a few tools :
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#### **On Windows** (every thing is done in Windows 10's Linux console) :
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1) Check that python3 is installed and available :
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```bash
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python3 -V
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#If python3 is not installed, do it with :
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sudo apt install python3
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```
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2) You will need to install or update nodejs (**version v14+ required**) as it is used to generate the fonts :
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```bash
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node -v
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#If nodejs is not installed, first install NVM (Node Version Manager) :
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curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.3/install.sh | bash
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```
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3) Don't forget to reload you .bashrc file, as it was modified by the NVM install script, using :
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```bash
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source ~/.bashrc
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```
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These lines were added at the end of your .bashrc file automatically :
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```bash
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export NVM_DIR="$HOME/.nvm"
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[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
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[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion" # This loads nvm bash_completion
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```
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4) Now that NVM is installed and accessible, install node :
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```bash
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#Then using NVM, install node, let's say version 16 :
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nvm install 16
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#Check the installed version number :
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node -v
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#My output is : v16.20.2
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```
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5) Then having node installed, install the **[lv_font_conv](https://github.com/lvgl/lv_font_conv)** utility :
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```bash
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sudo npm install lv_font_conv -g
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#If the lv_font_conv module is successfully installed, you should be able to check its verrsion :
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lv_font_conv -v
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#My output is : 1.5.2
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```
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6) Finally, using the command line terminal, you need to move to the ***src/W800_SDK_v1.00.10/lvlg/lvgl_v8.3/scripts/built_in_font*** folder and execute, using
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python3, the **built_in_font_gen.py** script :
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```bash
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#Here are some font regeneration examples using the tool :
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python3 built_in_font_gen.py -s 14 --bpp 4 --font Montserrat-Medium.ttf -r 0x20-0x7F,0xB0,0x2022,0xC0,0xC4,0xC7,0xC8,0xC9,0xCA,0xCB,0xCE,0xD4,0xD6,0xD9,0xDB,0xDC,0xDF,0xE0,0xE2,0xE4,0xE7-0xEB,0xEE,0xEF,0xF6,0xFB,0xFC,0x153 -o lv_font_montserrat_14.c
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python3 built_in_font_gen.py -s 16 --bpp 4 --font Montserrat-Medium.ttf -r 0x20-0x7F,0xB0,0x2022,0xC0,0xC4,0xC7,0xC8,0xC9,0xCA,0xCB,0xCE,0xD4,0xD6,0xD9,0xDB,0xDC,0xDF,0xE0,0xE2,0xE4,0xE7-0xEB,0xEE,0xEF,0xF6,0xFB,0xFC,0x153 -o lv_font_montserrat_16.c
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python3 built_in_font_gen.py -s 24 --bpp 4 --font Montserrat-Medium.ttf -r 0x20-0x7F,0xB0,0x2022,0xC0,0xC4,0xC7,0xC8,0xC9,0xCA,0xCB,0xCE,0xD4,0xD6,0xD9,0xDB,0xDC,0xDF,0xE0,0xE2,0xE4,0xE7-0xEB,0xEE,0xEF,0xF6,0xFB,0xFC,0x153 -o lv_font_montserrat_24.c
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python3 built_in_font_gen.py -s 28 --bpp 4 --font Montserrat-Medium.ttf -r 0x20-0x7F,0xB0,0x2022,0xC0,0xC4,0xC7,0xC8,0xC9,0xCA,0xCB,0xCE,0xD4,0xD6,0xD9,0xDB,0xDC,0xDF,0xE0,0xE2,0xE4,0xE7-0xEB,0xEE,0xEF,0xF6,0xFB,0xFC,0x153 -o lv_font_montserrat_28.c
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python3 built_in_font_gen.py -s 30 --bpp 4 --font Montserrat-Medium.ttf -r 0x20-0x7F,0xB0,0x2022,0xC0,0xC4,0xC7,0xC8,0xC9,0xCA,0xCB,0xCE,0xD4,0xD6,0xD9,0xDB,0xDC,0xDF,0xE0,0xE2,0xE4,0xE7-0xEB,0xEE,0xEF,0xF6,0xFB,0xFC,0x153 -o lv_font_montserrat_30.c
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```
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7) Once done, the new generated fonts file will be in the same folder (***src/W800_SDK_v1.00.10/lvlg/lvgl_v8.3/scripts/built_in_font***) named **lv_font_'font name'_'size'.c**
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like lv_font_monserrat_14.c, happy fonting !!!
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## Sensors and I2C addresses :
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* Accelerometer : **BMA456** I2C addr : 0x18 or 0x19 7 bit address.
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* Magnetometer : **QMC5883L** I2C addr : 0x0D 7 bit address.
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* Pressure/Temperature sensor : **BMP280** I2C addr : 0x76 or 0x77 7 bit address.
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* Heart Rate and SpO2 sensor : **Max30102** I2C addr : 0x57 7 bit address.
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## Power source :
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* A single ~ 600 mAh cell lipo battery.
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* A charge/discharge controller stage :
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* TP4056
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* DW01A + 8205A
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## Screen + touch element :
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* [Screen with touch](https://fr.aliexpress.com/item/1005004887834918.html?spm=a2g0o.order_list.order_list_main.22.340a5e5bX8WCb0&gatewayAdapt=glo2fra) : GC9A01 with touch panel. It uses the required 4 line Serial Interface.
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* Touch element i2c addr : 0x15, CST816D I2C touch driver.
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## Programming and charging :
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* The smart watch programming and charging is done through the same USB port
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using a magnetic 4 pin plug.
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## MCU Pin assignement table :
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| Pin Number | Pin Name | Type | Function | Pull UP/DOWN| Connected to | Comment |
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|------------|----------|------|----------|-------------|--------------|---------|
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|1|PB_20|I/O|**UART0_RX**/PWM1/UART1_CTS/I²C_SCL|U/D|**USB/Serial TX flash pin**||
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|2|PB_19|I/O|**UART0_TX**/PWM0/UART1_RTS/**I²C_SDA**|U/D|**USB/Serial RX flash pin** and **BMA456, Touch Panel, HMC5883L and BMP280 SDA pins**||
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|3|WAKEUP|I|**External Wake Up Pin**|D|**BMA456 IRQ 1 line** and **Touch Panel IRQ line** through NAND Gate|The chip is waken up when the pin is HIGH|
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|4|RESET|I|Reset Pin|D|**Micro switch** and **USB/Serial RTS pin**||
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|5|XTAL_OUT|O|External crystal output||||
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|6|XTAL_IN|I|External crystal input||||
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|7|AVDD3V3|P|Chip power supply, 3.3V||||
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|8|ANT|I/O|RF Antenna||||
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|9|AVDD3V3|P|Chip power supply, 3.3V||||
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|10|AVDD3V3|P|Chip power supply, 3.3V|||
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|11|AVDD3V3_AUX|P|Chip power supply, 3.3V||||
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|12|TEST|I|Test function configuration pin||||
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|13|BOOTMODE|**I/O**|BOOTMODE and I²S_MCLK/LSPI_CS/PWM2/I²S_DO|U/D|**Touch Panel Reset line**||
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|14|PA_1|I/O|JTAG_CK/**I²C_SCL**/PWM3/I²S_LRCK/ADC0|U/D|**BMA456, Touch Panel, HMC5883L and BMP280 SCL pins**||
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|15|PA_4|I/O|JTAG_SWO/I²C_SDA/PWM4/I²S_BCK/**ADC1**|U/D|**Battery resistor voltage divider output**||
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|16|PA_7|I/O|**PWM4**/LSPI_MOSI/I²S_MCK/I²S_DI/Touch0|U/D|**LCD backlight N-MOSFET driver**||
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|17|VDD3V3IO|P|IO power supply, 3.3V||||
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|18|PB_0|I/O|**PWM0**/LSPI_MISO/UART3_TX/PSRAM_CK/Touch3|U/D|**Vibration motor control pin**||
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|19|PB_1|**I/O**|PWM1/LSPI_CK/UART3_RX/PSRAM_CS/Touch4|U/D|**Touch Panel IRQ line**||
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|20|PB_2|I/O|PWM2/LSPI_CK/**UART2_TX**/PSRAM_D0/Touch5|U/D|**Debug UART serial output**||
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|21|PB_3|**I/O**|PWM3/LSPI_MISO/UART2_RX/PSRAM_D1/Touch6|U/D|**TP4056A Charging Signal**||
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|22|PB_4|**I/O**|LSPI_CS/UART2_RTS/UART4_TX/PSRAM_D2/Touch7|U/D|**TP4056A Charged Signal**||
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|23|PB_5|**I/O**|LSPI_MOSI/UART2_CTS/UART4_RX/PSRAM_D3/Touch8|U/D|**Battery resistor voltage divider enable**||
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|24|VDD3V3IO|P|IO power supply, 3.3V||||
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|25|CAP|I|External capacitor, 4.7µF||||
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|26|PB_6|I/O|UART1_TX/**MMC_CLK**/HSPI_CK/SDIO_CK/Touch9|U/D|**LCD Serial Clock Pin**||
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|27|PB_7|I/O|UART1_RX/**MMC_CMD**/HSPI_INT/SDIO_CMD/Touch10|U/D|**LCD Serial Data Pin**||
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|28|PB_8|**I/O**|I²S_BCK/MMC_D0/PWM_BREAK/SDIO_D0/Touch11|U/D|**LCD Data or Command Selection Pin**||
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|29|PB_9|**I/O**|I²S_LRCK/MMC_D1/HSPI_CS/SDIO_D1/Touch12|U/D|**LCD Reset Pin**||
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|30|PB_10|**I/O**|I²S_DI/MMC_D2/HSPI_DI/SDIO_D2|U/D|**LCD Chip Select Pin**||
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|31|VDD3V3IO|P|IO power supply, 3.3V||||
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|32|PB_11|**I/O**|I²S_DO/MMC_D3/HSPI_DO/SDIO_D3|U/D|**BMA456 IRQ 2 line**||
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|33|GND|P|Ground (Central Pad)||||
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## What is done/working so far - HARDWARE :
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* Schematic :
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* First version of the schematic is done an available [here](design/Kicad/W800_Smart_Watch/W800_Smart_Watch.pdf).
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* 2 layer PCB version 1.0 design is done based on the schematic. It has a 38 mm diameter size.
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* Wake up interrupts handling :
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* Wrist tilt MCU wake up working
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* LCD touch wake up
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* MCU sleep feature :
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* Sleep and Standby modes working but implemented in a crude way.
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Can and should be improved.
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* PIFA antenna tested, performance isn't the best but it is working well for what it will be used for (BLE).
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## What is done/working so far - SOFTWARE :
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* LVGL 8.3.3 running on the SOC using DMA.
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* Supported LCD drivers :
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* ILI9341 in 4-line serial mode (8 bits) with D/C pin
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* ST7789 in 4-line serial mode (8 bits) with D/C pin
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* GC9A01 in 4-line serial mode (8 bits) with D/C pin <-- **this one is used**.
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* Supported LCD touch screen :
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* CST816D I2C capacitive touch ic.
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* Six screens designed and working with LVGL :
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* An analog watch face based on a existing casio watch.
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* An analog watch face having a carbon fiber vibe.
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* A circular menu screen with icons.
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* A setting screen allowing to tune the smart watch :
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* Time and date settings
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* Display settings
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* Notifications settings
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* Connectivity settings for BLE
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* Language settings (French, German and English available)
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* System information page
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* A compass application using the QMC5883L.
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* An altimeter app.
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* A music player app (working with GadgetBridge).
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* A find my phone screen which makes the device ring and vibrate (must be connected to the watch using BLE through the GadgetBridge app).
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* Debug UART on PB_2 (**output only**)
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* Sensors/Actuators :
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* QMC5883L driver working
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* BMA456 driver working
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* BMP280 driver working (temperature + pressure + altitude)
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* MAX30102 driver working
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* Battery voltage sense using ADC is working
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* Vibration motor controlled by PWM working
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* Update the W800 SDK from version 1.00.08 to version 1.00.10 released in January of 2023.
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* Added **multi-language** support to the UI, still some translations to do though.
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* Step counter using the BMA456 is working and steps are displayed on the watch face.
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## **To Do list :**
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* Write the notification app listing all the received notification to be able to read them again or delete them if wanted.
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* Write a flash light app which sets the screen brightness to its maximum and
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sets a white background, be able to make it also flash with a red background.
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* Add a quick access drawer (like on android) to :
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* turn bluetooth on and off faster
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* enable or disable the watch wrist tilt wakeup
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* open the flash light app
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* access the battery charge/discharge history app (to be written)
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* more if some ideas pop
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* Update the compass algorithm to also use the Z axis and not having to hold the watch flat.
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* Update the settings app to include a sensor category where calibration can be done for the magnetometer as well as for the temperature sensor to get more accurate temperature when the watch is worn.
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* Update the GadgetBridge parser to work with the latest version of GadgetBridge.
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* Write an algorithm to get the heart rate measurements and a way to make them periodically and displays it in a dedicated app and on the watch face.
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* Display the weather forecast on the watch face using icons (Data coming from GadgetBridge).
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* Finish to translate all texts in the 3 supported languages (French, German and English).
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* Design a digital watch face with a light memory footprint to be able to choose a watch face kind (analog or digital) at run time.
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* Improve the step counting mechanism (reset step count every midnight).
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* Write an app to track step counts made every day (on a week for example with a graph).
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* Write an alarm app which set an RTC alarm to vibrate the watch.
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* Write a timer app with countdown and lap functionality.
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* Implement a battery saving mode activated on low batterie (ie <= 10 %).
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* This mode would :
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* turn bluetooth off.
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* set the screen brightness to 50 %.
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* throttle the MCU frequency down to 80 or 40 Mhz.
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## Done List :
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* Two analog watch faces available (which can be selected at compile time using the **app_config.h** header file).
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* A circular menu screen.
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* Total number of steps on the watch face.
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* A music player (works with GadgetBridge).
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* A compass app with temperature reading.
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* An altimeter app.
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* The find my phone app (works with GadgetBridge).
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* A setting app to set :
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* Time and date
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* Display settings
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* Notification settings
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* Connectivity (BLE)
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* Language
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* About section
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* Vibration on the watch works and is configurable.
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* Wrist tilt to wake the watch up.
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* Receive phone notifications on the watch (works with GadgetBridge).
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* Smooth screen changes with transitions.
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* Adaptative dynamic MCU clock speed to save power or have better visual performance.
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* Battery discharging, charging and charged status on the watch face.
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* Improve the received notification design (colour and layout) as well as the AM or PM time when hour format is set to 12H.
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* Call the GadgetBridge parser close notification when notification is closed.
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## Achieved power consumption recap:
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(Need to work on sleep current :-( )
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| Mode | Current draw | Estimated battery life (600 mAh lipo) |
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|--------------------------|--------------------------|---------------------------------------|
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|Active (80MHz clk)<br>(No BLE / No WiFi / Screen on) |~54.51 mA | ~11 hours |
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|Active (160MHz clk)<br>(No BLE / No WiFi / Screen on)|~64.7 mA | ~9 hours |
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|Sleep (Clock is OFF / No BLE) |~3.97 mA | ~6 days |
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|Sleep (40MHz clk / With BLE) |~49.20 mA | ~12 hours |
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|Standby (Not available) |~1.8 mA |~13 days and 15 hours |
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## Some screenshots of the achieved visuals currently running on the watch using lvgl :
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## Here is a preview of what the PCB should look like :
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### The front :
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### The back :
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## Update 21/03/2023 : PCBs were received from JLCPCB and this what they look like :
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## And the watch running :
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### **Everything works :**
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* BMA456 ✓
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* BMP280 ✓
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* QMC5883L ✓
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* MAX30102 ✓
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* Screen + touch panel ✓
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* CH340E for chip programming ✓
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* Vibration motor ✓
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* Charge IC ✓
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### **Known issues :**
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* DW01A chip not driving the double N mosfet as expected (when plugging a battery, the watch doesn't start without beeing plugged into the charger at least once).
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Thought it might be a capacitor value issue, replaced C12 with a 82nf and 68nf caps, but it did not solve the problem :(.
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**TLDR : after installing the battery, the watch might need to be plugged to it's charger at least once to start up**
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## If you are interested in the project or if you just want to say hi, you can contact me at the email address : bugreport[at]laposte.net .
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