setup Timer1 as a counter

[SKROTNISSE]

Stupid problem here.

I'm using a 32.768 crystal.
And need to clear and read the time.
How can i Set timer 1 as a counter and reset it to measure time between two variables.
I need to meassure the time in ms.

Thanks for any help!
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This message was ported from CCS's old forum
Original Post ID: 144514938

[Haplo]

This should do it:
setup_timer_1(T1_EXTERNAL|T1_DIV_BY_1|T1_CLK_OUT);

Don't forget you have to connect the crystal pins to the ground with two 33pf capacitors.

Consult the CCS help for more setup_timer_1() options.

Ali
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This message was ported from CCS's old forum
Original Post ID: 144514940

[SKROTNISSE]

I have used get_timer and set_timer. But only get 0. Do I have to make a counter that ticks everytime the timer overflows? In that case hoe do I do that?
The crystal is connected to RC0 and RC1 and I use two 33pF capacitors.

Cheers
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This message was ported from CCS's old forum
Original Post ID: 144514941

[Haplo]

Ok, it seems your counter is not incrementing. Post your code so I can take a look at it.

__Ali
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This message was ported from CCS's old forum
Original Post ID: 144514943

[SKROTNISSE]

Here is the code I tried.
But I probably need some more, Im a newbee on timers u see. Or of corse you have seen that.
If you got anything I can use I would be very grateful!

setup_timer_1(T1_EXTERNAL|T1_DIV_BY_1|T1_CLK_OUT);
while(TRUE){
SET_TIMER1(0);
delay_ms(200);
Time=GET_TIMER1();
Time2=(Time/32.768);

}


Cheers
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This message was ported from CCS's old forum
Original Post ID: 144514984

[Haplo]

Ok. Now please answer the following questions:
1-How have you set up PORTC?
2-What is the type of variable Time? It should be a 16bit integer
3-What is Time2? it should be float
4-Which one of those variables iz zero? When you read Time it should return a value around 6553
5-What version of compiler are you using?

You can also take the '|T1_CLK_OUT' part out and try it again.

Ali
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This message was ported from CCS's old forum
Original Post ID: 144514986

[SKROTNISSE]

1. I havent done anything special about PORTC
2. Time is a Long, old compiler version int16 and so on doesn't work
3. Time 2 is float
4. Time 2 is zero
5. Compiler version: 2.717

But do I need a function that the counter is put in?
Or can I just use these sentenses: Get and Set timer to get time and reset timer?

cheers
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This message was ported from CCS's old forum
Original Post ID: 144514987

[Haplo]

Your code should work. Is Time zero as well? Or only Time2 is zero? What is the value of Time?

I think you should strongly consider upgrading to a newer compiler version.

__Ali
___________________________
This message was ported from CCS's old forum
Original Post ID: 144514988