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prach
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| 2 interrupts in same program is not work |
 Posted: Tue Mar 16, 2004 10:52 pm |
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hi all, sorry for my enlish.
i want to use a counting press button in setting up time, but when i use 2 interrupts ( rtcc,rb ) in program, interrupts rtcc is not work, can you help me this problem.
thank you.
code c pcwh 1.80
| Code: |
#include <16f628A.h>
#fuses XT,NOWDT,NOPROTECT,PUT
#use delay(clock=4000000)
#include "lcd.c"
#define INTS_PER_SECOND 61 // (4000000/(4*64*256))
#byte port_b=0x06
#priority rtcc,rb
BYTE int_count; // Number of interrupts left before a second has elapsed
BYTE last_b;
int time_dec,time_sel,start_mode,free,save_time;
long int time_inc,value,seconds;
process_count(){
value=0;
wait_1:
//----- Debounce switch ---------------------
if(!input(pin_b0)){
++value;
chk_button:
if(!input(pin_bo)){
goto chk_button;
}
//-------------------------------------------
if(seconds==0){
goto exit;
}
lcd_gotoxy(3,1);
printf(lcd_putc,"%lu seconds ",seconds);
lcd_gotoxy(3,2);
printf(lcd_putc,"%lu value ",value);
goto wait_1;
exit:
delay_ms(100);
}
//---- RB Interrupts -----------------------------------------------------
#int_rb
rb_isr ( ) {
byte changes;
changes = last_b ^ port_b;
last_b = port_b;
disable_interrupts(int_rb);
if (bit_test(changes,5 )&& !bit_test(last_b,5)){
//b5 went low
}
if (bit_test(changes,6)&& !bit_test (last_b,6)){
//b6 went low
seconds=30; //set time 30 seconds
process_count();
delay_ms(500);
}
if (bit_test(changes,7)&& !bit_test (last_b,7)){
//b7 went low
}
delay_ms(100); //debounce
enable_interrupts(int_rb);
}
//---- Timer 0 interrupts ------------------------------------------------
#int_rtcc // This function is called every time
void clock_isr() { // the RTCC (timer0) overflows (255->0).
if(--int_count==0) { // per second.
--seconds;
int_count=INTS_PER_SECOND;
}
}
//----- Main --------------------------------------------------------------
void main() {
int_count=INTS_PER_SECOND;
set_timer0(0);
setup_counters( RTCC_INTERNAL, RTCC_DIV_64 );
enable_interrupts(INT_RTCC);
enable_interrupts(INT_RB);
enable_interrupts(GLOBAL);
lcd_init();
delay_ms(6);
do {
lcd_gotoxy(1,1);
printf(lcd_putc,"Counter.");
lcd_gotoxy(2,2);
printf(lcd_putc,"%lu second ",seconds);
} while (TRUE);
}
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Neutone
Joined: 08 Sep 2003
Posts: 839
Location: Houston
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| Posted: Tue Mar 16, 2004 11:37 pm |
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I would suggest you not use delays within interupts.
There are better ways to debounce an input. |
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edi
Joined: 22 Dec 2003
Posts: 82
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| Posted: Tue Mar 16, 2004 11:43 pm |
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Netone,
What is your suggest for better debounce an input? |
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Neutone
Joined: 08 Sep 2003
Posts: 839
Location: Houston
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| Posted: Tue Mar 16, 2004 11:53 pm |
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| edi wrote: | Netone,
What is your suggest for better debounce an input? |
This is what I do.
| Code: |
if(PIN_PWR_MON) // Test the inputs status at this time
{ if(bit_test(++debounce_counter_PWR_MON,CounterSize)) // Aproach and test for true status
{ --debounce_counter_PWR_MON; // Remove counter overflow state
PWR_Mon_Alarm=1; // Set true status
} // Make adjustments to the tested bit
} // to change the counter size
else // The input was false
{ if(--debounce_counter_PWR_MON==0) // Aproach and test for false status
{ ++debounce_counter_PWR_MON; // Remove counter from zero state
PWR_Mon_Alarm=0; // Set false status
}
}
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It compiles very small and runs fast. I just include a lot of these in a routine to service all the inputs and call it frequently. It takes several samples before settings the input variable bit and rejects noise very well. |
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prach
Guest
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| Posted: Wed Mar 17, 2004 1:32 am |
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| i think delay in interrupts is not effect to interrupts rtcc, because i use delay wait before exit. |
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edi
Joined: 22 Dec 2003
Posts: 82
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| Posted: Wed Mar 17, 2004 8:16 am |
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Newtone,
Can you please explain your debouncer it's too profesional C code.
What are the variables size? |
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Neutone
Joined: 08 Sep 2003
Posts: 839
Location: Houston
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| Posted: Wed Mar 17, 2004 9:55 am |
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| edi wrote: | Newtone,
Can you please explain your debouncer it's too profesional C code.
What are the variables size? |
In the following
PIN_PWR_MON is an int1 #bit mapped to an input pin
debounce_counter_PWR_MON is an int8
CounterSize is a constant int8 that specifies how many passes are required to make the change from high to low. It is the power of 2 between 2 and 7. For example 4 would make the counter count between 0 and 7. 5 would make the counter count between 0 and 15.
PWR_Mon_Alarm is an int1 that is the debounced global variable used in other functions to act on the input.
I call this function ever mS to debounce many inputs. In another function I also call every mS, when I detect a change in the state of PWR_Mon_Alarm from 0 to 1, I know it's time to save to EEPROM before the charge on an input capacitor is lost. Doing this allows many task to run concurrently instead of consecutively.
| Code: |
if(PIN_PWR_MON) // Test the inputs status at this time
{ if(bit_test(++debounce_counter_PWR_MON,CounterSize)) // Aproach and test for true status
{ --debounce_counter_PWR_MON; // Remove counter overflow state
PWR_Mon_Alarm=1; // Set true status
} // Make adjustments to the tested bit
}
else // The input was false
{ if(--debounce_counter_PWR_MON==0) // Aproach and test for false status
{ ++debounce_counter_PWR_MON; // Remove counter from zero state
PWR_Mon_Alarm=0; // Set false status
}
}
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