Automotive 20x4 chars LCD Display

Hi there,

I'm working on a small automotive display, using the following stuff:

• Olimexino STM32 running the latest Espruino 1.65
  
• a 20x4 HD44780 LCD 5V (white over blue) for which I'm using external power (and not the 3.3V the Olimexino board provides)
  
• a Terratrip speed cable sensor (dedicated racing solution, easy wiring)
  
• Simple Voltage Sensors (up to 25VCC, but my truck is 12VCC so it should be fine) to measure various auto probes - these are from robotbase.cn
  
• and finally a DS18B20 temperature sensor for outside temperature.
  
  

I've picked the Olimexino because it's noise immune, has a more industrial touch and is easily powered by 12V/5V/etc.

So far I've managed to:

• flash Espruino 1.65 to the Olimexino STM32 board
  
• wire up the LCD and display a mock-up of what I want to achieve
  
• run the Date/Time test app
  
• build a small app to read voltages using the analog voltage sensors - which I've used to measure every charger and battery in the house - and it works great. I intend to use this to plug to various auto probes but mostly to check the level of battery charging the alternator delivers - in real time.
  
• write this post
  
  

I'll try to update as often as I can with code if anyone is interested.

The information displayed is (left to right, row by row):

• current speed | current date/time
  
• current rpm | exterior temperature
  
• partial odometer | engine coolant temp
  
• total odometer | battery charging level
  

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