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GiG
Joined: 03 Sep 2021
Posts: 39
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| Irregular counting in the timer0,Timer1 PIC |
 Posted: Fri Sep 03, 2021 11:50 pm |
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Hi, I do not know whether to open the topic correctly or not.
I had a question about PIC and CCS, I'm a little familiar with it
I wanted to make a 1 second pause with the timer.
I wanted help with the code I wrote.
The problem is Timers that sometimes the timer works but it counts irregularly or it counts and stops somewhere.
Notes:
-The connections to the timer sockets are constantly going up and down.
-The frequency is 8 MHz.
-PIC16F1939
The rest of the functions that are related to the display on a specific segment worked well. I tried counting with simple functions and it had no problems in counting.
| Code: | #include <16f1939.h>
#FUSES PUT
#FUSES NOBROWNOUT
#fuses HS,NOWDT,NOPROTECT,NOLVP ,PLL_SW,NOMCLR
#device ADC=10
#use delay(internal=8000000)
#INT_TIMER0
//#INT_TIMER2
#use FIXED_IO( A_outputs=PIN_A7,PIN_A6,PIN_A5,PIN_A4,PIN_A3,PIN_A2,PIN_A1,PIN_A0 )
#use FIXED_IO( B_outputs=PIN_B1,PIN_B0 )
#use FIXED_IO( C_outputs=PIN_C7,PIN_C6,PIN_C5,PIN_C4,PIN_C3,PIN_C2,PIN_C1,PIN_C0 )
#use FIXED_IO( D_outputs=PIN_D7,PIN_D6,PIN_D5,PIN_D4,PIN_D3,PIN_D2,PIN_D1,PIN_D0 )
#use FIXED_IO( E_outputs=PIN_E1,PIN_E0 )
int16 speedb,timex,time_hour ,time_mint,time_sec,dg_hour,yk_hour,dg_mint,yk_mint,h_timer,m_timer,on_timer,second,hour,minute,counter;
int16 hg_dama,sg_dama,dg_dama,yk_dama,seg_buf,chbuf1,chbuf2,chbuf3,h,t;
#define up_led PIN_A0
#define onoff_led PIN_A1
#define dwn_led PIN_A2
#define light_led PIN_A3
//-----------------------------7 segment
#define cm10 PIN_A4
#define cm9 PIN_A5
#define cm8 PIN_E0
#define cm7 PIN_E1
#define cm5 PIN_A6
#define cm6 PIN_A7
#define cm4 PIN_C0
#define cm3 PIN_C1
#define cm2 PIN_C2
#define cm1 PIN_C3
#define d_seg PIN_C4
#define c_seg PIN_C5
#define b_seg PIN_C6
#define a_seg PIN_C7
#define dot_seg PIN_D0
#define g_seg PIN_D1
#define f_seg PIN_D2
#define e_seg PIN_D3
//----------------------------------------- c phase
#define sens1 PIN_B1
#define sens2 PIN_B2
//-----------------------------------------
#define buzzer PIN_B1
#define ir_sensor PIN_B4
//------------------------------------------toch key
#define up_key PIN_B5
#define onoff_key PIN_B6
#define dwn_key PIN_B7
#define light_key PIN_E3
//-------------------------------------------output
#define speed4 PIN_B0
#define speed3 PIN_D7
#define speed2 PIN_D6
#define speed1 PIN_D5
#define light PIN_D4
void show_seg(void){
switch (seg_buf){
Case 0 :
output_high(a_seg);
output_high(b_seg);
output_high(c_seg);
output_high(d_seg);
output_high(e_seg);
output_high(f_seg);
output_low(g_seg);
break;
Case 1:
output_low(a_seg);
output_high(b_seg);
output_high(c_seg);
output_low(d_seg);
output_low(e_seg);
output_low(f_seg);
output_low(g_seg);
break;
Case 2:
output_high(a_seg);
output_high(b_seg);
output_low(c_seg);
output_high( d_seg);
output_high( e_seg);
output_low(f_seg);
output_high( g_seg);
break;
Case 3:
output_high( a_seg);
output_high( b_seg);
output_high(c_seg);
output_high( d_seg);
output_low(e_seg);
output_low(f_seg);
output_high( g_seg);
break;
Case 4:
output_low( a_seg);
output_high( b_seg);
output_high( c_seg);
output_low(d_seg);
output_low(e_seg);
output_high( f_seg);
output_high( g_seg);
break;
Case 5:
output_high( a_seg);
output_low(b_seg);
output_high( c_seg);
output_high( d_seg);
output_low(e_seg);
output_high( f_seg);
output_high( g_seg);
break;
Case 6:
output_high(a_seg);
output_low(b_seg);
output_high(c_seg);
output_high( d_seg);
output_high(e_seg);
output_high(f_seg);
output_high(g_seg);
break;
Case 7:
output_high(a_seg);
output_high(b_seg);
output_high(c_seg);
output_low(d_seg);
output_low(e_seg);
output_low(f_seg);
output_low(g_seg);
break;
Case 8:
output_high(a_seg);
output_high( b_seg );
output_high(c_seg );
output_high(d_seg);
output_high(e_seg);
output_high( f_seg );
output_high(g_seg );
break;
Case 9:
output_high( a_seg);
output_high( b_seg);
output_high(c_seg);
output_high(d_seg);
output_low( e_seg);
output_high( f_seg);
output_high( g_seg);
break;
}
}
void split_display(void)
{
chbuf1=chbuf3/10;
chbuf2=chbuf1*10;
chbuf2=chbuf3-chbuf2;
}
void main(){
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_16);
set_timer0(131);
while (1)
{
if (get_timer0()==0)
{
set_timer0(250);
counter++;
}
if (counter>=20){
minute++;
counter=0;
}
if (minute>=59){
hour++;
minute=0;
}
if (hour>=59){
second=minute=hour=0;
}
output_high(cm1);
output_high(cm2);
output_high(cm3);
output_high(cm4);
output_high(cm5);
output_high(cm6);
output_high(cm7);
output_high(cm8);
output_high(cm9);
output_high(cm10);
chbuf3=hour;
split_display();
dg_hour=chbuf1;
yk_hour=chbuf2;
seg_buf=dg_hour;
show_seg();
output_low( cm5);
Delay_us (10);
output_high( cm5 );
output_low(a_seg);
output_low(b_seg);
output_low(c_seg);
output_low(d_seg);
output_low(e_seg);
output_low(f_seg);
output_low(g_seg);
seg_buf=yk_hour;
show_seg();
output_low( cm6);
Delay_us (10);
output_high( cm6 );
chbuf3=minute;
split_display();
dg_mint=chbuf1;
yk_mint=chbuf2;
seg_buf=dg_mint;
show_seg();
output_low( cm7);
Delay_us (10);//50
output_high( cm7 );
output_low(a_seg);
output_low(b_seg);
output_low(c_seg);
output_low(d_seg);
output_low(e_seg);
output_low(f_seg);
output_low(g_seg);
seg_buf= yk_mint;
show_seg();
output_low( cm8);
Delay_us (10);//50
output_high( cm8 );
output_low(a_seg);
output_low(b_seg);
output_low(c_seg);
output_low(d_seg);
output_low(e_seg);
output_low(f_seg);
output_low(g_seg);
clear_interrupt(INT_TIMER0);
}
}
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Only the part related to the timer has a problem. Is there another way to write it? |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sat Sep 04, 2021 12:50 am |
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| Quote: | while (1)
{
if (get_timer0()==0)
{ |
Why do you think you will see this specific count of 0 ?
Your timer is counting at a rate of 125 KHz, which means it's clocked
every 8 usec. Your while() loop takes much longer than 8 usec to execute.
During that time, Timer0 will pass through many, many counts. The odds
of it being at a count of 0 when you poll it are very low.
| Quote: | #INT_TIMER0
//#INT_TIMER2 |
These two lines don't do anything. You have no interrupt routines.
You don't enable interrupts. Delete those two lines.
| Quote: |
#fuses HS,NOWDT,NOPROTECT,NOLVP ,PLL_SW,NOMCLR
#device ADC=10
#use delay(internal=8000000) |
If you're specifying the internal oscillator in the #use delay() statement,
then you don't need the HS or PLL_SW fuses. |
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temtronic
Joined: 01 Jul 2010
Posts: 9107
Location: Greensville,Ontario
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| Posted: Sat Sep 04, 2021 5:14 am |
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Had a quick look at your code....
Have a look/read of this thread...
http://www.ccsinfo.com/forum/viewtopic.php?t=26177
it's a SW based Real Time Clock in the Code Library.
You can probably modify and use it.
I did several times, before using the DS3231 RTC came out.
Jay |
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GiG
Joined: 03 Sep 2021
Posts: 39
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| Posted: Sat Sep 04, 2021 11:29 pm |
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| PCM programmer wrote: | | Quote: | while (1)
{
if (get_timer0()==0)
{ |
Why do you think you will see this specific count of 0 ?
Your timer is counting at a rate of 125 KHz, which means it's clocked
every 8 usec. Your while() loop takes much longer than 8 usec to execute.
During that time, Timer0 will pass through many, many counts. The odds
of it being at a count of 0 when you poll it are very low.
| Quote: | #INT_TIMER0
//#INT_TIMER2 |
These two lines don't do anything. You have no interrupt routines.
You don't enable interrupts. Delete those two lines.
| Quote: |
#fuses HS,NOWDT,NOPROTECT,NOLVP ,PLL_SW,NOMCLR
#device ADC=10
#use delay(internal=8000000) |
If you're specifying the internal oscillator in the #use delay() statement,
then you don't need the HS or PLL_SW fuses. |
Thanks for the tips.
So I used that interrupt instead and the problem is solved. |
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