On Thu, Aug 5, 2010 at 4:56 AM, Eur van Andel <[email protected]> wrote:
> > On 2 Aug 2010, at 06:36 , vasile surducan wrote: > > hi Eur, > > Why did you stop on all yours/Roman Black bresenham libraries to generate 1 > second? > > > Because that is what I need. > > If you generate 1milisecond (or less) instead, you have a real time library > process usefull for something else than clock, then maybe the question of > how long the ISR can be, may be actual. > > > I might be able to do that. But do tell me what you want. > Nothing at this time, thank you. > > Should I make a millisecond word that counts to 1000? > Should I keep the second, or will you or others check every second and > update the clock? > > I'm not too fond of doing calendar stuff in an isr. IMHO an ISR should not > be < 100 asm instructions, preferably < 20. > My old rtc_isr_tmr0 was 19 instructions, the new one is 69. This is not an > improvement, I think. > > Concerning the length: a millisecond counter, with a 100-instruction ISR > spends 10% of the time in the ISR, if running on 4 MHz. > > > > Vasile > > On Sat, Jul 31, 2010 at 3:13 PM, <[email protected]> wrote: > >> Revision: 2170 >> Author: eur.van.andel >> Date: Sat Jul 31 15:12:29 2010 >> Log: made a new all-jal, 5 line RTC ISR with TMR3, needs 50 lines comment >> >> http://code.google.com/p/jallib/source/detail?r=2170 >> >> Added: >> /trunk/include/jal/rtc_isr_tmr3.jal >> Modified: >> /trunk/include/jal/rtc_isr_tmr0.jal >> >> -- >> You received this message because you are subscribed to the Google Groups >> "jallib" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<jallib%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/jallib?hl=en. >> >> > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/jallib?hl=en. > > > --- > > 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 > > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<jallib%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/jallib?hl=en. > -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
