The DAC voltage routine is the worst hack I have ever come up with (that was a close call....)
The processor is an 8051 and the SDCC compiler I used does not have the floating point math library, so I had to decode the DAC voltage "by hand" and it is quite possible that the routine breaks down for some DAC values which I did not encounter here (I have 3 TBolts). I would be surprised if any bug could have survived the stringent 5 minutes of testing I subjected this project to but who knows... :) I will look at it. I also have a version of the code compiled with a different compiler (Keil) to try if someone wants to, but I doubt the problem is with the compiler. For those who have seen the wiki page for the GPSMon project, there is a new firmware version which can display local time (compensates for GPS offset, time zone and DST). However, the DAC routine is unchanged. Didier KO4BB ------Original Message------ From: Mark Sims Sender: [email protected] To: Time-Nuts ReplyTo: Time-Nuts Subject: [time-nuts] Tbolt LCD Monitor - No DAC reading Sent: May 12, 2011 2:56 AM I have a sneaking suspicion that I know what is going on... Ages ago I sent the code for my first TSIP parser to someone (can't remember who... was it Dieder?) who was going to use it in a microcontroller based tbolt monitor. Fluke's monitor is just a lift of that design. Well, my code had a bug in the DAC message processor. If I remember correctly it was something like reading the DAC value as a single precision number, but the tbolt was sending a double precision number (or the other way around). _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. Sent from my BlackBerry Wireless thingy while I do other things... _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
