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ruijing2
Joined: 30 Apr 2008
Posts: 4
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| how to use PWM and CCP_CAPTURE_FE ? |
 Posted: Wed Apr 30, 2008 4:04 am |
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hi can u help me?
i use ccs c and PIC18F452.
i want to use PWM and CCP_CAPTURE_FE.
Try it but when i on PWM and CCP_CARTURE_FE TOGETHER as ccp1 and ccp2. The PWM(ccp2) did something to the CCP_CARTURE_FE(ccp1) interrupt.
| Code: |
#elif defined(__PCH__)
#include <18F452.h>
#device ICD=true
#fuses HS,NOWDT,NOLVP,WDT128,NOPUT,NOBROWNOUT,NOPROTECT,NOWRTD,CPD
#use delay(clock=20000000)
#use rs232(parity=N,BITS=8,xmit=PIN_C6,rcv=PIN_C7) // Jumpers: 8 to 11, 7 to 12
#endif
int32 en=0;
int32 countstore=0,countstore2=0;
unsigned int32 count=0,duty=128;
int32 ans=0,ans3=0,ans2=0;
int32 in=0,count2=0;
#INT_TIMER1
void time1()
{
// for(;;)
count++;
}
#INT_CCP1
void hahah()
{
// if(count2>=1 && count2 <17 )
// {
countstore2=CCP_1;
countstore=count;
count=0;
// }
//else if(count2==0)
// {
// en=CCP_1;
// count2++;
// count=0;
// }
ans3=((countstore*65536)+countstore2)-en;
// printf("en=%lu \r\n ",en);
// printf("countstore2=%lu \r\n ",countstore2);
// printf("countstore=%lu \r\n ",countstore);
// printf("count2=%lu \r\n ",count2);
// printf("ans=%lu \r\n ",ans);
countstore=0;
in=0;
if(en!=countstore2)
{
en=countstore2;
// count2++;
// count=0;
}
if(count2!=0)
{
ans2+=ans3;
}
count2++;
if(count2==17)
{
ans=ans2/(count2-1);
// printf("countstore2=%lu \r\n ",countstore2);
// printf("countstore=%lu \r\n ",countstore);
// printf("count2=%lu \r\n ",count2-1);
printf("ans=%lu \r\n ",ans);
// countstore=0;
count2=0;
// countstore2=0;
in=0;
ans2=0;
}
// countstore2=CCP_1;
// countstore=count;
}
void main() {
set_uart_speed(9600);
setup_ccp1(CCP_CAPTURE_FE);
setup_ccp2(CCP_PWM);
setup_timer_1(T1_EXTERNAL|T1_DIV_BY_1);
setup_timer_2 ( T2_DIV_BY_1, 255, 1);
enable_interrupts(INT_TIMER1);
enable_interrupts(INT_CCP1);
enable_interrupts(GLOBAL);
for(;;)
{
if(in==0)
{
if(ans>10000001 && duty >0)
{
duty--;
}else if(ans<9999999 && duty <128)
{
duty++;
}
in=1;
}
set_pwm2_duty(10L);
}
}
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Matro
Guest
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| Posted: Wed Apr 30, 2008 4:16 am |
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Please post a small clean compilable code that demonstrates the problem and try to provide a deeper explanation of the issue you are encountering.
Matro |
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ruijing2
Joined: 30 Apr 2008
Posts: 4
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| Posted: Wed Apr 30, 2008 4:22 am |
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#INT_TIMER1
void time1()
{
}
#INT_CCP1
void hahah()
{
}
void main() {
set_uart_speed(9600);
setup_ccp1(CCP_CAPTURE_FE);
setup_ccp2(CCP_PWM);
setup_timer_1(T1_EXTERNAL|T1_DIV_BY_1);
setup_timer_2 ( T2_DIV_BY_1, 255, 1);
enable_interrupts(INT_TIMER1);
enable_interrupts(INT_CCP1);
enable_interrupts(GLOBAL);
for(;;)
{
set_pwm2_duty(10L);
}
} |
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ruijing2
Joined: 30 Apr 2008
Posts: 4
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| re: |
| Posted: Wed Apr 30, 2008 4:34 am |
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| it keep interrupt the ccp1 as it will interrupt at 1s only |
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Matro
Guest
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| Posted: Wed Apr 30, 2008 5:16 am |
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I definitely don't understand what is the "problem".
What is your hardware?
What are you trying to do?
What did you expect?
What do you really obtain?
Matro |
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ruijing2
Joined: 30 Apr 2008
Posts: 4
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| Posted: Wed Apr 30, 2008 5:47 am |
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| i want to use EXTERNAL 1pps to read 10M count from EXTERNAL 10MHz clock. And to control the PWM. |
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