99 lines
No EOL
4.5 KiB
Markdown
99 lines
No EOL
4.5 KiB
Markdown
# PineTime
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> The PineTime is a free and open source smartwatch capable of running custom-built open operating systems. Some of the notable features include a heart rate monitor, a week-long battery as well as a capacitive touch IPS display that is legible in direct sunlight. It is a fully community driven side-project, which means that it will ultimately be up to the developers and end-users to determine when they deem the PineTime ready to ship.
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> We envision the PineTime as a companion for not only your PinePhone but also for your favorite devices — any phone, tablet, or even PC.
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*https://www.pine64.org/pinetime/*
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The goal of this project is to build a firmware designed for the PineTime around FreeRTOS.
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It's coded using a mix of C and C++ : the NRF52-SDK and FreeRTOS are written in C, but I prefer to write my own code in C++.
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Please **NOTE : for now, this project is in heavy development state**. Feel free to use it, contribute to it or fork it !
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This project is based on https://github.com/JF002/nrf52-baseproject.
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It's a CMake project that configure everything needed to build applications for the PineTime (https://wiki.pine64.org/index.php/PineTime).
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I tested this project (compile only) with the following versions:
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* gcc-arm-none-eabi-8-2019-q3-update (from https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads)
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* nRF5_SDK_15.3.0_59ac345 (from https://www.nordicsemi.com/Software-and-Tools/Software/nRF5-SDK)
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I've tested this project on the actual PineTime hardware.
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## Current state
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* Project builds and runs on the Pinetime;
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* Logs available via JLink RTT;
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* Basic (but faster) LCD driver.
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* One big font to display the time (hours : minutes)
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* BLE advertising, connection and bonding
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* BLE CTS client (retrieves the time from the connected device if it implements a CTS server)
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* Push button to go to disable screen (and go to low power mode) / enable screen (and wake-up). **NOTE** : I'm not completely sure the power consumption is optimal, especially in sleep mode. Any help to measure and debug this is welcome.
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* Touch panel : wake up when sleeping and draw square on screen when running
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## Stub using NRF52-DL
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See [this page](./doc/PinetimeStubWithNrf52DK.md)
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## How to build
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* Download and unzip arm-none-eabi and NRF52 SDK
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* Clone this repo
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* Call CMake with the following command line argument
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- -DARM_NONE_EABI_TOOLCHAIN_PATH=[Path to the toolchain]
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- -DNRF5_SDK_PATH=[Path to the SDK]
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- -DNRFJPROG=[Path to NRFJProg]
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```
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$ mkdir build
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$ cd build
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$ cmake -DCMAKE_BUILD_TYPE=Debug -DARM_NONE_EABI_TOOLCHAIN_PATH=... -DNRF5_SDK_PATH=... -DNRFJPROG=... ../
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```
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* Make
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```
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$ make -j
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```
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## RTT
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RTT is a feature from Segger's JLink devices that allows bidirectionnal communication between the debugger and the target.
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This feature can be used to get the logs from the embedded software on the development computer.
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* Program the MCU with the code (see above)
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* Start JLinkExe
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```
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$ JLinkExe -device nrf52 -if swd -speed 4000 -autoconnect 1
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```
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* Start JLinkRTTClient
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```
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$ JLinkRTTClient
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```
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## Tools
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- https://github.com/eliotstock/memory : display the memory usage (FLASH/RAM) using the .map file from GCC.
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## BLE connection, bonding and time synchronization
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At runtime, BLE advertising is started. You can then use a smartphone or computer to connect and bond to your Pinetime.
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As soon as a device is bonded, Pinetime will look for a **CTS** server (**C**urrent **T**ime **S**ervice) on the connected device.
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Here is how to do it with an Android smartphone running NRFConnect:
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* Build and program the firmware on the Pinetime
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* Install NRFConnect (https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Connect-for-desktop)
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* Start NRFConnect and create a CTS server :
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- Tap the hamburger button on the top left and select "Configure GATT server"
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- Tap "Add service" on the bottom
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- Select server configuration "Current Time Service" and tap OK
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* Go back to the main screen and scan for BLE devices. A device called "PineTime" should appear
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* Tap the button "Connect" next to the PineTime device. It should connect to the PineTime and switch to a new tab.
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* On this tab, on the top right, there is a 3 dots button. Tap on it and select Bond. The bonding process begins, and if it is sucessful, the PineTime should update its time and display it on the screen.
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