View Full Version : is there a simple way make a condition true on a rising edge on an input
EDWARD
- 3rd June 2005, 10:06
is there a way to make a if then statement like this:
IF rising edge is detected on portb.0 THEN
do some code
endif
im trying to increment a varible by 1 every time it receves a low high transistion on input pin portb.0. the timing between of the signals could be from 10 to 500 ms. i cant have any long pauses.
Ingvar
- 3rd June 2005, 11:46
Since you want to use PortB.0 you can check the interruptflag.
OPTION_REG.6 = 1 ' rising edge
INTCON.1 = 0 ' reset the interruptflag
IF INTCON.1 = 1 THEN
INTCON.1 = 0 ' reset the interruptflag
' your code
ENDIF
EDWARD
- 5th June 2005, 19:55
well thats exctly what i needed. thank you very much.
i was trying to run a chunk of code only when portb.0, on my 16f73 configured and set as an input, read a rising edge signal. as ingvar has shown i can use interrupts.
'this part is only run once at the top of my program'
OPTION_REG.6 = 1 ' rising edge
INTCON.1 = 0 ' reset the interruptflag
'this part is contained in a loop'
IF INTCON.1 = 1 THEN
INTCON.1 = 0 ' reset the interruptflag
' your code
ENDIF
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