X-TRACK IS AN OPEN-SOURCE GPS BIKE COMPUTER DESIGNED AND MANUFACTURED BY FASTSHIFT. It supports offline real-time map display, supports recording and displaying real-time tracks, and exports track files in standard GPX format.

GPS bike speedometer with support for offline maps and track recording插图1

function
Support speed, distance, time, acceleration, heading display
Offline maps, support real-time display, support zoom
Support for step counting
Support latitude and longitude, altitude
Support RTC auto-recovery based on GPS
Tracks can be recorded, and files in GPX format can be exported
Support automatic data saving (JSON format file)
Four hours long (continuous work, always on)
Support for on-PC emulation, off-hardware debugging (configured for Release x86)
Support real-time display
Hardware configuration
Main control: AT32F403ACGU7 (Frequency: 240MHz RAM: 224KB ROM: 1MB)
Screen: ST7788 IPS 1.5inch SPI interface 240×24049 resolution 60Hz refresh rate
Memory: Micro SD CARD 32GB
Input device: Rotary encoder
RTC: The MCU has a built-in RTC clock
Computer step counting: LSM6DSM (support hardware step counting output)
Geomagnetometer: LIS3MDL
GPS：ATGM336H（BDS + GPS + GLONASS + GALILEO + QZSS + SBAS）
Battery: Li-ion 3.7V 683030 700mAh
Power Management: LP5907-3.3 + MCP73831
Shell: 3D printing light-curing GPS bike speedometer with support for offline maps and track recording插图2

Software Section

The software development environment is divided into two parts, Visual Studio and Keil MDK:

The underlying driver part is developed and debugged using Keil
The application layer code runs on the LVGL simulator and is programmed to the MCU after the function verification is completed
The two projects reuse the same set of code, with driver isolation through the HAL layer
Functional architecture

The overall software architecture of X-TRACK is shown in the following figure, and the system consists of three layers: HAL, Framework, and APP.

The HAL layer is responsible for the underlying chip driver and sensor raw data acquisition
The framework layer is the core part of the software, which consists of three modules: LVGL, page scheduling, and message framework, which are responsible for graphics rendering, page lifecycle management, and message distribution processing, respectively
The APP layer displays the user interface, which consists of three parts: map, watch face, and system information

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Functional demo
Real-time trajectory display

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Export historical tracks

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Speed measurement can also be carried out on high-speed rail

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View system data such as battery level, riding records, GPS positioning, sensors, etc

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The project uses the GPL3.0 open source license, and you can read more content by yourself.

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systemhere Free source code GPS bike speedometer with support for offline maps and track recording https://www.systemhere.com/kyym/gps-bike-speedometer-with-support-for-offline-maps-and-track-recording.html

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What is the delivery method?

1, automatic: after taking the photo, click the (download) link to download; 2. Manual: After taking the photo, contact the seller to issue it or contact the official to find the developer to ship.

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How long is the trading cycle?

1, the default transaction cycle of the source code: manual delivery of goods for 1-3 days, and the user payment amount will enter the platform guarantee until the completion of the transaction or 3-7 days can be issued, in case of disputes indefinitely extend the collection amount until the dispute is resolved or refunded!

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Matters needing attention

1. Heptalon will permanently archive the process of trading between the two parties and the snapshots of the traded goods to ensure that the transaction is true, effective and safe! 2, Seven PAWS can not guarantee such as "permanent package update", "permanent technical support" and other similar transactions after the merchant commitment, please identify the buyer; 3, in the source code at the same time there is a website demonstration and picture demonstration, and the site is inconsistent with the diagram, the default according to the diagram as the dispute evaluation basis (except for special statements or agreement); 4, in the absence of "no legitimate basis for refund", the commodity written "once sold, no support for refund" and other similar statements, shall be deemed invalid; 5, before the shooting, the transaction content agreed by the two parties on QQ can also be the basis for dispute judgment (agreement and description of the conflict, the agreement shall prevail); 6, because the chat record can be used as the basis for dispute judgment, so when the two sides contact, only communicate with the other party on the QQ and mobile phone number left on the systemhere, in case the other party does not recognize self-commitment. 7, although the probability of disputes is very small, but be sure to retain such important information as chat records, mobile phone messages, etc., in case of disputes, it is convenient for seven PAWS to intervene in rapid processing.

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Systemhere declaration

1. As a third-party intermediary platform, Qichou protects the security of the transaction and the rights and interests of both buyers and sellers according to the transaction contract (commodity description, content agreed before the transaction); 2, non-platform online trading projects, any consequences have nothing to do with mutual site; No matter the seller for any reason to require offline transactions, please contact the management report.

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