-
Recent Posts
Recent Comments
Archives
- May 2022
- December 2021
- September 2021
- July 2021
- May 2021
- April 2021
- October 2019
- August 2019
- April 2019
- February 2019
- January 2019
- May 2018
- January 2018
- November 2017
- May 2017
- January 2017
- December 2016
- November 2016
- May 2016
- April 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- August 2015
- July 2015
- June 2015
- April 2015
- March 2015
- February 2015
- January 2015
- December 2014
- July 2014
- June 2014
- May 2014
- April 2014
- November 2013
- October 2013
- September 2013
- July 2013
- June 2013
- May 2013
- April 2013
- March 2013
- February 2013
- December 2012
- November 2012
- October 2012
- August 2012
- June 2012
- May 2012
- April 2012
- March 2012
- February 2012
Categories
Meta
Monthly Archives: October 2012
Arduino Timing Failure
Why does this attempt to time a fixed-point math multiplication yield 0 microseconds? After examining the resultant assembly code produced, it appears the optimizing compiler performed the math, eliminated the fixed-point code and treated the answer as a constant. Look … Continue reading
Continued Look at Fixed Point Math on the Arduino Platform
Continuing my overly simplified comparison of 24.8 fixed point vs. floating math on the AVR168/328 chip, I compared the elapsed time of the following two division operations running at 16Mhz: That’s nearly 1.8 times faster for the fixed-point math. If … Continue reading
Fixed Point Math on the Arduino Platform
Here is an overly simplified comparison of 24.8 fixed point vs. floating math on the AVR168/328 chip. I compared the elapsed time of the following two multiplications running at 16Mhz: That’s nearly 9.5 times faster. However, my comparison is not … Continue reading
FREQUENCY and TIME
Posted in Uncategorized
Tagged arduino, frequency, hz, khz, mhz, micros(), millis, time
Leave a comment
Teensy 3.0
I’ve been using Teensy-Arduino compatible boards for several years, and this new version looks very promising. It is programmable from inside the arduino IDE. The Teensy 3.0 is a 32bit ARM Cortex-M4 running at 48mhz with some of the following … Continue reading
Posted in Uncategorized
Leave a comment