Ccpr1 Register

[Bruce]

Run this in the MPLAB sim. Have the stimulus window open, click animate, and when it stops on "IF (capture = 0) Then loop" ' Wait here until captured click the stimulus "fire button" to toggle RC2.

DEFINE LOADER_USED 1 ' Optional, allows use of melabs Loader
DEFINE osc 20

capture VAR PIR1.2 ' CCP1 capture flag
overflow VAR PIR1.0 ' Timer1 overflow flag

A VAR WORD ' Word variable that stores the value
I VAR BYTE
period var WORD

T1CON=%00000000 ' Timer1 reset
TMR1L=0 ' Reset Timer 
TMR1H=0 ' Remember Timer is OFF 
TRISC.2 = 1
CCP1CON=%00000000 
CCPR1L=0 
CCPR1H=0

pir1.2=0 ' Reset Capture Flag 
pir1.0=0 ' TMR1 register did not overflow

CCP1CON = %00000101 ' Enable the CCP1 capture, RISING edge
PIE1=%00101111 ' Enables:USART-SSP-CCP1-TMR2 to PR2 match -
' TMR1overflow interrupt

'********************* MAIN *************************
loop:
IF (capture = 0) Then loop ' Wait here until captured 

T1CON = %00000001 ' TMR1 prescale=1, and turn it on (1uS per count)
CCP1CON = %00000100 ' Enable the CCP1 capture, FALLING edge
pir1.2=0

PERIOD.lowBYTE = CCPR1L ' Store the captured value in
PERIOD.highBYTE = CCPR1H ' period variable

capture = 0 ' Clear the capture flag

write 0,PERIOD.lowbyte
goto Loop

If you're running this with animate, then go have yourself a cup of coffee because it's going to take a while before the EEPROM write happens.

If you use the run button, then click the stimulus fire button a few times while it's running, then click stop after a few seconds. In the EEPROM window, you'll see location 00 holding the captured value.

[battlechess]

Bruce,
Tks a lot!!!!
It finally working!!!!

tks a lot again