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using timer for 16f877 or 18f4550

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anuphr

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how to use the timer in a 16f877 with c

i know how to set a timer
but now i need to start the timer from some middle value like 100h
how can i store 100h in the timer register
and i am using ultrasonic so i am planning to use a timer
how can i read the time count present in the timer after i receive the signals
i am using pic 16f877 or pic 18f4550

if anyone has the code do mail it too me plzzzzzzzz

plzz do help me i want to join engineering so preparing by building projects
 

18f4550 timers

Hi,

You can preload a timer with 0x0100 simply by writing to it -
clfr TMR1L
clrf TMR1H
bsf TMR1H, 0

Try looking at the CCP module for timing your pulses
 

timers in c 18f4550

i am writing program in c using mplab
how to write in c these codes plzz
guide me
 

timer 0 in 18f4550

you can load value you wish (0x100) to timer registers TMRxH and TMRxL, don't forget to set interrupt related registers and create ISR for the timer.
just the syntax will be, suppose you are using timer 0:
TMR0H = 0x01; //you will load to the timer register 0x0100
TMR0L = 0x00;

good luck
 

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