The trick to running the atmega328 at 3.3v and not 5v is to load a new ‘bootloader’ on it. The chip I purchased came on top of an Arduino Duemilanove. As such, it was pre-programmed (which is what the ‘bootloader’ code does) to run at 5v. (For more on ‘bootloaders’ and arduinos see here.) So I basically needed to load a new ‘bootloader’ on to the chip.
LCD: SparkFun’s serLCD and NewSoftSerial
http://www.youtube.com/watch?v=skqVepTQMRU The video above shows SparkFun’s serLCD in action using a library (serLCD.h) which inherits all of the NewSoftSerial library functions and then adds a few of its own. The library is set out in full below (with download) but first up, my first sketch using the serLCD (which might help others get a feel […]
capeMirror v. 2
The capeMirror Wiring On the right can be seen the pin mapping. The capeMirror Library Now it’s just a question of combining the following libraries into one: Stepper_Aclr8_2, Stepper_Aclr8_i, Matrix_Steppers, and SerialParse. /* * capeMirror v2a * * created by Ben @ Cape Ealing * 24 January 2010 * */ //******************************************************************** // Initial Definitions //******************************************************************** […]
arduino: one library within another
It’s now a question of drawing together all the arduino sketches (2 accelerating stepper motors, bluetooth, and keypad) together into 1 sketch. In fact, I decided to create a new library (or class / object) called ‘capeMirror’ which would contain within it the following:
1. Control of two stepper motors
2. Control of a keypad
3. A method to parse messages received from the laptop
keypad: controlling two stepper motors
The next part of the puzzle is to get the keypad to control the two stepper motors. The keypad needs to respond (as the layout suggests) as follows: 1 = up and left; 2 = up; 3 = up and right etc. I also want all this wrapped up in a library so that […]
