Programming an arduino bike computer. How to write os?

Question

Arduino

there is an arduino with a screen and a bike with a speed sensor. I wanted to make a simple bike computer. to show and save all the parameters, as well as to make the backlight of the wheels. I do not want to buy it, because the finished cycle computer has a very modest functionality, it does not save anything. and the backlight is not cheap. but the question immediately arose of how to write an OS for a bike computer? I don’t know where to start, how to write a bootloader and this OS itself in general? it is necessary to write the sensor driver and backlight ... can I somehow use the microcontroller as a processor, and the flash drive as RAM?

Answer 1

arduino and OS - warm and soft. start with google. According to arduino bicycle computer, there are a bunch of examples of bicycle computers. deal with the collection and visualization of data - then easily add saving to flash.

Answer 2

The speed measurement sensor is an encoder (in one form or another). It is absolutely not a problem to hook it to one of the pins of the arduino. For logging, buy a ready-made board for an sd card, there are enough examples on the net.
Backlighting on the arduino is done without problems.
But I would advise, in addition to logging to the card, to make a BT module and bind to smart.