So, I decided to take this one step further and build a library that hides the details of the mutex and variadic macro. To use the library you will need to: Go into your libraries directory and make a new directory called ‘mprintf’ Copy these two files into the new directory; mprintf.h mprintf.cpp Put the [...]
Tag Archives: Arduino
mprintf: a simple thread safe printf for DuinoOS Part A: Getting a thread safe printf to work
Monday, January 11, 2010
There are lots of ways to implement a thread safe printf for DuinOS (or free RTOS). The following is a version that renames printf as mprintf. Like an fprintf function, mprintf has a leading parameter which must be passed with the rest of the printf variables. This implementation exposes the methodology used to make printf [...]
mprintf: a simple thread safe printf for DuinoOS Part A: Getting non threaded printf to work
Sunday, January 10, 2010
I thought it best that I document how I got printf to work and how I made it thread safe for DuinoOS (or freeRTOS for that matter) Getting non threaded printf to work. printf makes use of a file handle called stdout. This file handle is null unless we do something to change its value. [...]
How does an Atmega boot?
Wednesday, December 9, 2009
The bootloader (stk500) used by arduino and other atmega vendors allows for self modifying code. Normaly not a good idea, however, being able to use your atmega to load code onto the very same chip is extremely handy (think, in the field re-programming and programming your chip without a flash burner) So, how does all [...]
The devil is in the details: Atmega startup to freertos
Sunday, November 15, 2009
Figuring out why something breaks usually involves understanding how it is supposed to work. Sure, it was easy getting my first Atmega328 code running using Arduino. Getting the DuinOS version of freeRTOS was a little bit more of a challenge but ran remarkably well given its alpha state. Getting a printf function to work using [...]
RTOS for Arduino
Friday, November 13, 2009
List of RTOS for Arduino and their current activity state
piece parts
Monday, November 2, 2009
avrdude: http://www.bsdhome.com/avrdude/ This is the application that loads a program onto the atmega328. It has two modes, a direct program mode and ‘special’ mode that makes use of an on board (the atmega chip) boot loader. example of a command line avrdude that loads a hex file using the arduino bootloader This works from the [...]
