The cycle tool
2004-08-30 22:42 by Ian
This was another HC11-based tool that I built for my own embedded work. But this one's job is to generate and count pulses, optionally triggering a relay for button-press simulation.
HC11 32-bit by 32-bit multiplication routine
2004-05-16 00:43 by Ian
A couple quick subroutines that give an HC11 the means to get a 64-bit product from two 32-bit factors. I wrote it down on paper while I was sitting in my calculus class and copied it into my assembler verbatim when I got home.
Comment [1]
DTMF Logger
2003-12-11 00:35 by Ian
The DTMF logger uses an MT8870 DTMF decoder chip to listen to a POTS line and store any digits it hears in a 24C256 I2C EEPROM.
Comment [2]
The hammer tester
2002-09-23 23:56 by Ian
My first experience working as an independent contract engineer was for my dad at age 19.
AT Keyboard Interface
1999-06-17 02:36 by Ian
My first HC11 project when I was 16. This device plugs into an AT keyboard and converts the scancodes to ASCII, sending them over an RS-232 port at 9600bps.