Counter bigger than a var word/65K - overflow

[jorge]

hello "smart people" :-)
i need a var that counts over the 65k limit of the var word and save it to the internal EEPROM of the uC, is there an "elegant way"/smart way of coding it than using and additional var word that increments everytime the main counter var word gets overflow ?

thanks in advance for any info/trick :-)

[p5taylor]

Hi jorge did you solve the problem at the thread listed below as i have the same problem any help greatly recieved thanks

http://www.picbasic.co.uk/forum/show...hlight=COUNTER

[TonyCNC]

hi
maybe you could have two word sized varables say Cnt_a and Cnt_b
when Cnt_a hits 65536 increment Cnt_b ,clear Cnt_a and start counting again
Cnt_b is the number of times you reached 65K add Cnt_a gives you the Total
count.

[boboco]

Hi,

as Tony says, word Cnt-A wrap-around to count up Cnt-B once.

A simple method as example;



IF newcount then Flag = 0 'Flag to prevent first count setting B

WHILE countup 'As long as counting is required

WHILE Cnt-A > 0 AND Flag = 1 'Counting in progress

Cnt-A = Cnt-A + 1 ' Count operation for A

Flag = 1

WEND

Cnt-B = Cnt-B + 1


WEND




in eeprom simply:

WRITE 0, Cnt-A.byte1
WRITE 1, Cnt-A.byte0
WRITE 2, Cnt-B.byte1
WRITE 3, Cnt-B.byte0


Hope it helps,

Rob