Bike navigator/computer project
This this an ongoing project to develop a bespoke bicycle computer & navigator based around the Teensy 3.6 MCU.
In this thread I hope to log current progress and any milestones achieved, with today being such a milestone. This is MkII. Mk1 is complete, in-use and developed around the power hungry and bulky Arduino Due.
You may have seen this thread: This was the first milestone; building a vector backend for the font render. Given the nature of this project, bitmap fonts would not have been suitable.
Second milestone was developing applications which would parse, strip and convert raw OSM (OpenStreetMap) vector map files in to something usable and exactly required for the task at hand. This initially resulted in generating over 100k 'polyline' files and around 1k POI (PointsOfInterst) data files. The 2GB SD card didn't like this. Those 100k were then further reduced to ~6k files by packing each file in to one 16x16 file with a small lookup header. POI files were then reduced to around 450 by further eliminating what wont be displayed and what is of no use (I don't need to know that green patch is a Golf course).
Third: Produce an initial proof-of-concept desktop application with the intent of amalgamating the vfont library, developing the various algorithms required to select, load and render various polyline, polygons' and POI data files with the memory constraints of a Teenys 3.6.
This can be seen here:
Today: Finally we have everything running on the Teensy: What this is showing is a Garmin bicycle activity, as recorded during a stage of the Giro'd'Italia race, converted to a floating point latitude/longitude array and then run through the engine. This shows a per frame render time to be around 10~20ms, based upon zoom level and objects rendered. Anything greater than 1 second wouldn't have left much time for for the important stuff, such as 10hz GPS data acquisition & processing.
Next:
(1) Implement the AntPlus library code as posted previously.
(2) Write a new library for UBlox GPS modules concentrating solely on the UBX (binary) protocol.
(3) Develop an interface (initially on a desktop), and with that, a skeleton application core to form the basis of the computer.
(4) Whatever I've forgotten.
This this an ongoing project to develop a bespoke bicycle computer & navigator based around the Teensy 3.6 MCU.
In this thread I hope to log current progress and any milestones achieved, with today being such a milestone. This is MkII. Mk1 is complete, in-use and developed around the power hungry and bulky Arduino Due.
You may have seen this thread: This was the first milestone; building a vector backend for the font render. Given the nature of this project, bitmap fonts would not have been suitable.
Second milestone was developing applications which would parse, strip and convert raw OSM (OpenStreetMap) vector map files in to something usable and exactly required for the task at hand. This initially resulted in generating over 100k 'polyline' files and around 1k POI (PointsOfInterst) data files. The 2GB SD card didn't like this. Those 100k were then further reduced to ~6k files by packing each file in to one 16x16 file with a small lookup header. POI files were then reduced to around 450 by further eliminating what wont be displayed and what is of no use (I don't need to know that green patch is a Golf course).
Third: Produce an initial proof-of-concept desktop application with the intent of amalgamating the vfont library, developing the various algorithms required to select, load and render various polyline, polygons' and POI data files with the memory constraints of a Teenys 3.6.
This can be seen here:
Today: Finally we have everything running on the Teensy: What this is showing is a Garmin bicycle activity, as recorded during a stage of the Giro'd'Italia race, converted to a floating point latitude/longitude array and then run through the engine. This shows a per frame render time to be around 10~20ms, based upon zoom level and objects rendered. Anything greater than 1 second wouldn't have left much time for for the important stuff, such as 10hz GPS data acquisition & processing.
Next:
(1) Implement the AntPlus library code as posted previously.
(2) Write a new library for UBlox GPS modules concentrating solely on the UBX (binary) protocol.
(3) Develop an interface (initially on a desktop), and with that, a skeleton application core to form the basis of the computer.
(4) Whatever I've forgotten.
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