Yes, depending on the software the xtal rate could affect both serial comms and lcd display operation.
If you can't find a 4 mhz crystal quickly, let me know. 73, Steve W5ZA Shreveport, La. ----- Original Message ----- From: "Stefano Simonetti" <iw1...@yahoo.it> To: <amsat-bb@amsat.org> Sent: Saturday, August 22, 2009 5:36 PM Subject: [amsat-bb] Re: lvb tracker circuit -- xtal? I 've read now the .c file included in the lvb distribution, I noticed that xtal frequency surely affects the baud rate. I will find a 4 Mhz xtal, sorry for BW. ________________________________ Da: Stefano Simonetti <iw1...@yahoo.it> A: amsat-bb@amsat.org Inviato: Sabato 22 agosto 2009, 23:45:29 Oggetto: [amsat-bb] lvb tracker circuit -- xtal? Hi, I have problems in making the LVB tracker circuit run. I have built the LVB tracker ver. PCB v1.2, Firmware v0.7, Programmer v0.2, Documentation v1.9, 7 Dec 2004, by G6LVB. The firmware was flashed successfully with IC-PROG v 1.06B, a homebrewed interface for LPT, and an old PC with LPT1 running win98. The LVB circuit requires a 4 MHz XTAL for the PIC 16F876A. I tried with a 10MHz, and a 3,5795MHz as I haven't a 4MHz. No success. No LCD, no serial communication at all. Does anybody know if the problem could be in having installed a different xtal (i.e.: does the firmware takes care about the frequency of the clock?)? Regards, Stefano Simonetti (IW1RDZ) - Italy. _______________________________________________ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.339 / Virus Database: 270.13.58/2309 - Release Date: 08/17/09 06:08:00 _______________________________________________ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
