Can you have a constant so the user may choose to count in seconds or milliseconds? This way the ISR won't run as often if the user chooses.
Matt. On Aug 5, 7:56 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. > > 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 jallib > > [email protected]. > > For more options, visit this group athttp://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 jallib > > [email protected]. > > For more options, visit this group athttp://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]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
