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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| setup_ccpX(CCP_USE_TIMER3) |
 Posted: Mon Oct 29, 2007 7:04 am |
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18FXX2
no any information in CCS help file
if asinged to ccp1, still ccp1 get the content of timer 1
if asigned to ccp2, ccp2 is loaded on each interrupt with the previous containt+the new. example: first 1000 second 500, in second interrupt ccp2 is 1500. if third 2000, ccp2 is 3500 after interrupt.
this hapens also if ccp2 is cleared after moving the data !!!!!!!!!!!!!!
I test it in the simulator many times
I will apreciate a guidance
Joseph |
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Ttelmah
Guest
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| Posted: Mon Oct 29, 2007 8:38 am |
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Start (always), by looking at the chip's data sheet.
There are a huge number of different CCP operations. Which do you want?.
The 'CCP_USE_TIMER3' control, specifies the clock source, but not what CCP mode is to be used. You 'or' it with the required mode. So:
CCP_COMPARE_RESET_TIMER | CCP_CAPTURE_FE
Will capture the value in the timer, when triggered. Note that this_does not reset the timer_. None of the capture modes do. This (or the RE equivalent), is what you are seeing on CCP2. On CCP1, I'd suspect the capture mode is actually 'off', so you are just seeing what used to be in the buffer.
Best Wishes |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| setup_ccpX(CCP_USE_TIMER3) |
| Posted: Tue Oct 30, 2007 3:06 am |
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Thanks
I know how the timers are working, clearing etc'
I have other solution for my task, but again, for other people also that they maybe want to use both ccp with different timers.
18F252, 32MHz, timer increment 1us if prescaller 1:8
setup_timer_1(T1_INTERNAL|T1_DIV_BY_8);
setup_ccp1(CCP_USE_TIMER3)
setup_ccp1(CCP_CAPTURE_FE)//can be RE
still ccp1 captures timer1 and not timer3 when ccp1 interrupt occures
setup_timer_3(T3_INTERNAL|T3_DIV_BY_8);
setup_ccp2(CCP_USE_TIMER3)
setup_ccp2(CCP_CAPTURE_FE)//can be RE
ccp2 captures timer3 and then adding (each interrupt) the new timer3 value to the previous. always "set_timer3(0);" after ccp2 interrupt.
I test it in mplab many times.
AGAIN, no mention in CCS help about (CCP_USE_TIMER3)
Joseph |
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Ttelmah
Guest
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| Posted: Tue Oct 30, 2007 3:15 am |
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You don't use the setup the way you show. The last one will override the one in front. You need to use just _one_ setup line, with:
setup_ccp2(CCP_USE_TIMER3|CCP_CAPTURE_FE);
Best Wishes |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| setup_ccpX(CCP_USE_TIMER3) |
| Posted: Tue Oct 30, 2007 9:33 pm |
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Ttelmah
I used your advice
I don't know how to attache a file. If someone have interest, I will email the zipped file CCP_TEST.rar
It will be nice to get sugestion from CCS
bellow the results:
//ccp1+timer1 works properly
//--------------------------------------
//ccp1+timer3, timer1 enabled
//ccp1=0 by instruction
//ccp1, int1, ccp1=1000, triggered after 1000us
//ccp1=0 by instruction
//ccp1, int2, ccp1=3000, triggered after 2000us
//ccp1=0 by instruction
//ccp1, int3, ccp1=6000, triggered after 3000us
//!!! ccp1 gets 1000 just if mplab closed and opened again !!!
//if just compiled, the last value before+1000
//--------------------------------------
//ccp1+timer3, timer1 disabled
//ccp1=0 by instruction
//ccp1, int1, ccp1=6000, triggered after 1000us
//ccp1=0 by instruction
//ccp1, int2, ccp1=6000, triggered after 2000us
//ccp1=0 by instruction
//ccp1, int3, ccp1=6000, triggered after 3000us
//!!! if timer1 disabled, ccp1 gets the old value of 6000 !!!
//--------------------------------------
//ccp2+timer1 works properly
//----------------------------------------
//ccp2+timer3, timer1 enabled
//ccp2=0 by instruction
//ccp2, int1, ccp2=1000, triggered after 1000us
//ccp2=0 by instruction
//ccp2, int1, ccp2=3000, triggered after 2000us
//ccp2=0 by instruction
//ccp2, int1, ccp2=6000, triggered after 3000us
//!!! ccp2 gets 1000 just if mplab closed and opened again !!!
//if just compiled, the last value before+1000
//--------------------------------------
//ccp2+timer3, timer1 disabled
//ccp2=0 by instruction
//ccp2, int1, ccp2=13000, triggered after 1000us
//ccp2=0 by instruction
//ccp2, int2, ccp2=13000, triggered after 2000us
//ccp2=0 by instruction
//ccp2, int3, ccp2=13000, triggered after 3000us
//!!! if timer1 disabled, ccp2 gets the old value of 13000 !!!
//------------------------------------------------------------ |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| ccp |
| Posted: Tue Feb 12, 2008 10:04 pm |
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PCM programmer, sorry for the new topic.
someone know how to use "CCP_USE_TIMER3" ?
I would like to use it in capture mode.
I didn't succeed, also no answer from CCS from Oct. 31, 2007.
compiler version 3.249; pic 18F252
thanks |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Feb 12, 2008 10:33 pm |
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Post a short test program that shows the problem. The program must
be compilable without errors if I paste it into MPLAB and compile it. |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| ccp |
| Posted: Tue Feb 12, 2008 11:38 pm |
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commenting out set_timer3(0); no influence
commenting out set_timer1(0); both ccp increments until overflow
joseph
| Code: | #include <18F252.h>
#device adc=8
#FUSES WDT8 //Watch Dog Timer uses 1:8 Postscale
#FUSES H4 //High speed osc with HW enabled 4X PLL
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOOSCSEN //Oscillator switching is disabled, main oscillator is source
#FUSES BROWNOUT //Reset when brownout detected
#FUSES BORV42 //Brownout reset at 4.2V
#FUSES PUT //Power Up Timer
#FUSES NOSTVREN //Stack full/underflow will not cause reset
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOWRT //Program memory not write protected
#FUSES NOWRTD //Data EEPROM not write protected
#FUSES NOWRTB //Boot block not write protected
#FUSES NOWRTC //configuration not registers write protected
#FUSES NOCPD //No EE protection
#FUSES NOCPB //No Boot Block code protection
#FUSES NOEBTR //Memory not protected from table reads
#FUSES NOEBTRB //Boot block not protected from table reads
#use delay(clock=32000000,RESTART_WDT)
long ccp1time=0;
long ccp2time=0;
#int_TIMER2
void TIMER2_isr()
{
setup_timer_2(T2_DIV_BY_4,125,8);
output_toggle(pin_C1);//triggering ccp2
output_toggle(pin_C2);//triggering ccp1
}
#int_CCP1
void CCP1_isr()
{
ccp1time=CCP_1;
set_timer3(0);
}
#int_CCP2
void CCP2_isr()
{
ccp2time=CCP_2;
set_timer1(0);
}
void main()
{
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_spi(FALSE);
setup_wdt(WDT_ON);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_INTERNAL|T1_DIV_BY_8);
setup_timer_2(T2_DIV_BY_16,255,16);
setup_timer_3(T3_INTERNAL|T3_DIV_BY_8);
setup_ccp1(CCP_CAPTURE_FE|CCP_USE_TIMER3);
setup_ccp2(CCP_CAPTURE_FE);
enable_interrupts(INT_TIMER1);
enable_interrupts(INT_TIMER2);
enable_interrupts(INT_TIMER3);
enable_interrupts(INT_CCP1);
enable_interrupts(INT_CCP2);
setup_oscillator(False);
output_high(pin_C1);//starts together
output_high(pin_C2);//starts together
while(1)
{
restart_wdt();
enable_interrupts(GLOBAL);
}
}
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Feb 13, 2008 12:35 am |
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| Quote: |
setup_ccp1(CCP_CAPTURE_FE | CCP_USE_TIMER3);
setup_ccp2(CCP_CAPTURE_FE);
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You're attempting to assign Timer3 to CCP1, and Timer1 to CCP2.
But that's not allowed. The 18F452 data sheet says only three
combinations are allowed.
1. Timer1 assigned to both CCP1 and CCP2.
2. Timer3 assigned to both CCP1 and CCP2.
3. A split assignment: Timer3 for CCP2, and Timer1 for CCP1.
Here's the section from the data sheet:
| Quote: |
T3CCP2:T3CCP1: Timer3 and Timer1 to CCPx Enable bits
1x = Timer3 is the clock source for compare/capture CCP modules
01 = Timer3 is the clock source for compare/capture of CCP2,
Timer1 is the clock source for compare/capture of CCP1
00 = Timer1 is the clock source for compare/capture CCP modules |
Try doing it this way:
| Code: |
setup_ccp1(CCP_CAPTURE_FE);
setup_ccp2(CCP_CAPTURE_FE | CCP_USE_TIMER3);
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This will assign:
Timer1 --> CCP1
Timer3 --> CCP2 |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| ccp |
| Posted: Wed Feb 13, 2008 12:44 am |
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Thank you PCM programmer and sorry for taking your's and others time for nothing. Is working perfect. I don't know how I miss this point in the data sheet!
Joseph |
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