Time diference in microseconds

[mister_e]

try this one

' Program to measure time on two pins in a 1uSec increment
' Using PIC16F874 with TIMER1

TRISA=255  ' Set PORTA as INPUT
ADCON1 = 7 ' disable analog to digital converter

T1CON = 0  ' set timer clock source to internal (fosc/4)

Signal1TIME var word   
Signal2TIME var word
Signal1     var PORTA.1
Signal2     var PORTA.2

Start:

' measure period on RA.1
'
TMR1L=0
TMR1H=0
while signal1=0 ' waiting for rising edge
wend
T1CON.0 = 1 ' start Timer1
While signal1 ' wait for falling edge
wend
while signal1 = 0 ' wait for the next rising edge
wend
T1CON = 0 ' stopTimer
signal1time.lowbyte = TMR1L
Signal1time.highbyte = TMR1H


' measure period on RA.2
'
TMR1L=0
TMR1H=0
while signal2=0 ' waiting for rising edge
wend
T1CON.0 = 1 ' start Timer1
While signal2 ' wait for falling edge
wend
while signal2 = 0 ' wait for the next rising edge
wend
T1CON = 0 ' stopTimer
signal2time.lowbyte = TMR1L
Signal2time.highbyte = TMR1H

lcdout $fe,1  ,"RA1 : ",#signal1," uSec",_
       $fe,$c0,"RA2 : ",#signal2," uSec"

pause 2000
goto start

This is suppose to work.