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Shishido
Joined: 09 Mar 2014 Posts: 10
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#use capture can be 2 channels? |
Posted: Fri Apr 10, 2015 5:10 pm |
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I want to measure capture time by 2 channels such as CCP1 and CCP2.
However, it seems to [#use capture......] can be set only 1 channel as below.
Code: |
#include <16f1938.h>
#DEVICE ADC=10
#fuses INTRC_IO,NOWDT,NOPROTECT,PUT,NOCPD,NOLVP,BROWNOUT,PLL_SW
#use delay(clock = 8M)
#use RS232(BAUD =19200, XMIT=PIN_C6 ,RCV=PIN_C7)
#use capture(CCP1, FASTEST, CAPTURE_RISING, timer=1, define=capture_ticks_per_second, fastest)
#include <stdlib.h>
float32 GetFrequency(void);
//
main(){
float32 time;
time=GetFrequency();
printf("Freq=%5.2lf ",time);
}
//
float32 GetFrequency(void)
{
float32 t;
get_capture_time();
while (!get_capture_event());
t=get_capture_time();
while (!get_capture_event());
t=get_capture_time() - t;
Return(capture_ticks_per_second / t);
}
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How can I measure capture time both CCP1 and CCP2 used by [#use capture........] ? |
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jeremiah
Joined: 20 Jul 2010 Posts: 1329
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Posted: Fri Apr 10, 2015 6:11 pm |
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As with just about any #use, there is a "stream" option. Make two different #use capture() directives and assign them different streams. Then supply the stream arguments for capture methods. |
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Shishido
Joined: 09 Mar 2014 Posts: 10
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Thanks |
Posted: Fri Apr 10, 2015 10:31 pm |
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> jeremiah wrote: | As with just about any #use, there is a "stream" option. >Make two different #use capture() directives and assign them different >streams. Then supply the stream arguments for capture methods. |
Thank you for your quick reply. I am not familiar with 'stream' option of #use capture.
Sorry for your trouble, could you please let me know for make 2 different sample #use capture (........ stream=id) ?
Regards! |
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jeremiah
Joined: 20 Jul 2010 Posts: 1329
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Posted: Sat Apr 11, 2015 12:12 am |
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without having any background using your chip:
Code: |
#use capture(CCP1, FASTEST, CAPTURE_RISING, timer=1, define=capture_ticks_per_second, fastest, stream=CCP1_STREAM)
#use capture(CCP2, FASTEST, CAPTURE_RISING, timer=1, define=capture_ticks_per_second, fastest, stream=CCP2_STREAM)
void main(){
int16 v1,v2;
while(TRUE){
if(get_capture_event(CCP1_STREAM)){
v1 = get_capture_time(CCP1_STREAM);
}
if(get_capture_event(CCP2_STREAM)){
v2 = get_capture_time(CCP2_STREAM);
}
}
}
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Didn't test this for compilation or correctness...just an example of using stream identifiers. |
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Shishido
Joined: 09 Mar 2014 Posts: 10
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Posted: Sat Apr 11, 2015 2:43 am |
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jeremiah wrote: | without having any background using your chip:
Code: |
#use capture(CCP1, FASTEST, CAPTURE_RISING, timer=1, define=capture_ticks_per_second, fastest, stream=CCP1_STREAM)
#use capture(CCP2, FASTEST, CAPTURE_RISING, timer=1, define=capture_ticks_per_second, fastest, stream=CCP2_STREAM)
void main(){
int16 v1,v2;
while(TRUE){
if(get_capture_event(CCP1_STREAM)){
v1 = get_capture_time(CCP1_STREAM);
}
if(get_capture_event(CCP2_STREAM)){
v2 = get_capture_time(CCP2_STREAM);
}
}
}
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Didn't test this for compilation or correctness...just an example of using stream identifiers. |
//////////////////////////////////////
Thanks! However I face compile error when double [#use capture] defined.
--- Info 300 "PWM_1.c" Line 13(1,1): More info: Timer 1 tick is 500 ns
*** Error 99 "PWM_1.c" Line 14(5,116): Option invalid Bad Option: DEFINE |
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temtronic
Joined: 01 Jul 2010 Posts: 9178 Location: Greensville,Ontario
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Posted: Sat Apr 11, 2015 7:00 am |
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hmm...
define=capture_ticks_per_second
compiler doesn't 'like' this. Check the PIC header to see what options for DEFINE are valid.
Jay |
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Shishido
Joined: 09 Mar 2014 Posts: 10
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Resolves |
Posted: Sat Apr 11, 2015 7:17 am |
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temtronic wrote: | hmm...
define=capture_ticks_per_second
compiler doesn't 'like' this. Check the PIC header to see what options for DEFINE are valid.
Jay |
///////////////////////////////////
Thank you very much again, finally resolved problem
#use capture(CCP3, FASTEST, CAPTURE_RISING, timer=1, stream=CCP1_IN,define=capture_ticks_per_second1,fastest)
#use capture(CCP4, FASTEST, CAPTURE_RISING, timer=1, stream=CCP2_IN,define=capture_ticks_per_second2,fastest) |
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