On 31 Jul 2010, at 22:08 , mattschinkel wrote:
Good job on the RTC lib Rob. How accurate is it?
I have to thank Rob as well, for beautifying my code for rtc_isr_tmr0.
I just submitted a much better rtc_isr_tmr3, since I had used TMR0,
TMR1 and TMR2 in my current project. The ISR is only 5 lines and
contains no assembler. It works too. See sample: 18f2620_rtc_tmr3.jal
This has a 0.6% jitter and an accuracy of 2ppm @ 20 Mhz. You can
adjust this value:
const _rtc_cycles_per_second = (target_clock / 4)
If your xtal is not precise.
Now I'm going to ask William to make me some Python code to remotely
adjust the RTC.
---
ir EE van Andel [email protected] http://www.fiwihex.nl
Fiwihex B.V. Wierdensestraat 74, NL7604BK Almelo, Netherlands
tel+31-546-491106 fax+31-546-491107
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