Count Per Second

[HenrikOlsson]

Hi,

ok, so i will use one word variable every 5 seconds, everything into an array, and every 500 seconds i will put the array in an external eeprom, this should work!

I may be missing some key information here but why store it in array? Why not count for 5 seconds, write the value to the EEPROM, increase adress pointer by one (or two), reset count and start over?

/Henrik Olsson.

[oslinux]

PIC16F877A

If i store it in an array, i can write it directly via a page write in the external I2C EEPROM, i can't store in the EEPROM every 5 seconds, because it takes more than 10mS.

Luca

[mister_e]

PBP count is bul**** anyways, use a PIC timer for that. It will do the job in background.

From your sampling time you substract the needed time to write to your eeprom.

NOW you have something acurate. Unless, it's pure crap.

[oslinux]

please explain what do you mean for a "Pic timer",

P.S.: i'm going to bed, here it's 1:00 A.M....

[skimask]

please explain what do you mean for a "Pic timer",

P.S.: i'm going to bed, here it's 1:00 A.M....

Check the datasheet, tmr0, tmr1, tmr2, whichever...

[oslinux]

AAAH but it doesn't have the limit of 1 byte??

so you mean, when it's counting, i'm storing the data in the eeprom, right?

and with another timer i can count the seconds i have to sample, and stop the sampling at the right moment?

aniway it sound a bit complex to me... what happens if i geto to 255 counts while i'm writing the eeprom?

i'm going to see if there's a WORD timer,

Luca

[mister_e]

Timer1, T1CKI pin on PORTC if my memory serves me well.