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tienchuan
Joined: 25 Aug 2009
Posts: 175
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| Problem when using Timer0 Interrupt in RDA interrupt !!! |
 Posted: Fri Mar 30, 2012 6:08 am |
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Hi every one.
My problems is using timer0 interrupt inside RDA interrupt, my code is recieve character from rs-232 (in RDA interrupt programe) to check condition, if condition is true, jump to timer 0 interrupt to perform.
Here is my code :
| Code: |
#int_rda
void ngat_gprs(void)
{
char c1;
c1=fgetc(ID1);
switch (c1)
{
case 10: {
indexx=0;
}
break;
case 13: {
chk_gprs=0;
check_connect();
}
break;
default: {
connect_buffer[indexx]=c1;
indexx++;
}
break;
}
}
//------------------------------------------------------------------------------
void check_connect(void)
{
if ( (connect_buffer[0]=='C')&&(connect_buffer[1]=='O')&&(connect_buffer[2]=='N')
&& (connect_buffer[3]=='N')&&(connect_buffer[4]=='E')&&(connect_buffer[5]=='C')
&& (connect_buffer[6]=='T')&&(connect_buffer[8]=='O')&&(connect_buffer[9]=='K'))
{
chk_gprs=1;
indexx=0;
}
else {};
}
#int_timer1
void update_check(void)
{
if (chk_gprs==1)
{
fprintf(ID1,"AT+CIPSEND=%d\r\n",length_gps);
delay_ms(500);
fprintf(ID1,"%s \n",gps_str);
delay_ms(500);
}
}
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
void init_gprs(void)
{
fputs("AT+CIPSHUT\n",ID1);
delay_ms(1000);
fputs("AT+CIPSTART=\"TCP\",\"113.165.52.122\",\"2020\"\n",ID1);
delay_ms(1000);
}
void main(void)
{
TRISA=0;
TRISB=0;
TRISJ=0;
TRISE=0;
TRISD=0;
TRISH=0;
TRISG=0X04; //rs232
TRISC=0X80; //rs232
PORTJ=0;
PORTE=0;
PORTD=0;
setup_timer_1(RTCC_INTERNAL|RTCC_DIV_1|RTCC_8_BIT);
set_timer1(0);
enable_interrupts(int_rda2);
enable_interrupts(int_rda);
enable_interrupts(int_timer1);
enable_interrupts(global);
lcd_init();
lcd_gotoxy(3,1);
printf(lcd_putc,"GPS Tracking");
lcd_gotoxy(3,2);
printf(lcd_putc,"HAC Solutions ");
delay_ms(3000);
LCD_MoveLeft(20);
lcd_putc("\f");
while (1)
{
init_gprs();
}
}
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when i send character from Hyper Terminal to Pic, ("CONNECT OK"), but program not jump to update_check programe(int_timer0) to do.
Please show errors in my code.
thnks+regards.
_________________
Begin Begin Begin !!! |
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jeremiah
Joined: 20 Jul 2010
Posts: 1345
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| Posted: Fri Mar 30, 2012 6:47 am |
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You use both delays and print statements in your ISR. Aside from being pretty bad form, I wonder if the compiler is disabling interrupts in your main when you call those same functions. If it is, it is possibly your INT_RDA isr is missing data.
Have you verified that the PIC got the entire CONNECT string?
Also, you enable interrupts for RDA2, but don't have an ISR...not a good idea usually. |
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Bill Havins
Joined: 20 Nov 2006
Posts: 14
Location: Texas
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| Posted: Fri Mar 30, 2012 6:49 am |
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| Which PIC are you using? |
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tienchuan
Joined: 25 Aug 2009
Posts: 175
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| Posted: Fri Mar 30, 2012 11:53 am |
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| jeremiah wrote: | You use both delays and print statements in your ISR. Aside from being pretty bad form, I wonder if the compiler is disabling interrupts in your main when you call those same functions. If it is, it is possibly your INT_RDA isr is missing data.
Have you verified that the PIC got the entire CONNECT string?
Also, you enable interrupts for RDA2, but don't have an ISR...not a good idea usually. |
Hi Jeremiah !
Thanks for your reply.
Main purpose of my code is using timer 0 interrupt to always check conditon (in check_connect program ) and have must send data through rs232 (I used printf () command).
Oh, You tested with "CONNECT OK" and will be test with "CONNECT" soon 
Thank you
_________________
Begin Begin Begin !!! |
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tienchuan
Joined: 25 Aug 2009
Posts: 175
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| Posted: Fri Mar 30, 2012 11:54 am |
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| Bill Havins wrote: | Which PIC are you using?
|
Hi Bill Havins.
Thanks for your reply.
I used Pic 18F97J60 (2 uart port).
Thanks.
_________________
Begin Begin Begin !!! |
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asmboy
Joined: 20 Nov 2007
Posts: 2128
Location: albany ny
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| Posted: Fri Mar 30, 2012 9:13 pm |
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never use a printf in an interrupt
that is a code wrecker |
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iporboon
Joined: 29 Mar 2012
Posts: 2
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| Posted: Fri Mar 30, 2012 10:57 pm |
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Did you check that RDA interrupt worked correctly and chk_gprs=1 when you sent the desired string? Maybe use LED toggle.
Did you check that TIMER1 periodic interrupt worked correctly?
And you should clear the chk_gprs flag in the update_check function , not in the ngat_gprs function.
printf should not be the problem if you did not use TBE interrupt enable. |
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yamenn
Joined: 14 Jun 2014
Posts: 10
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| Posted: Sat Jun 14, 2014 7:52 am |
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I have the same problem.
I am trying to get GPS DATA using RDA interrupt and using Timer0 interrupt for alarm.
I can't use the both interrupts in the same time.
Any ideas ?  |
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yamenn
Joined: 14 Jun 2014
Posts: 10
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| Posted: Sat Jun 14, 2014 7:57 am |
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| Code: |
#include <18f452.h>
#FUSES NOWDT //No Watch Dog Timer
#FUSES HS
#FUSES NOPUT //No Power Up Timer
#FUSES NOPROTECT //Code protected from reading
#FUSES NOBROWNOUT //No brownout reset
//#FUSES NOMCLR //Master Clear pin used for I/O
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD //No EE protection
#use delay(clock=20M)
#use rs232(baud=4800, xmit=PIN_C6,rcv=PIN_C7)
#include <lcd11.c>
#include <stdlib.h>
#int_RDA
void RDA_isr(void)
{
int i;
let=getch();
if (let=='$')
{
letter[0]=getch();
letter[1]=getch();
letter[2]=getch();
letter[3]=getch();
letter[4]=getch();
if (letter[0]=='G'&&letter[1]=='P'&&letter[2]=='V'&&letter[3]=='T'&&letter[4]=='G')
{
gets(speed);
}
if (letter[0]=='G'&&letter[1]=='P'&&letter[2]=='Z'&&letter[3]=='D'&&letter[4]=='A')
{
gets(time);
//for (i=1;i<=6;i++)
//ck [i-1]=time[i];
day [0]=time[12];
day [1]=time[13];
mun [0]=time[15];
mun [1]=time[16];
year[0]=time[18];
year[1]=time[19];
year[2]=time[20];
year[3]=time[21];
}
if (letter[0]=='G'&&letter[1]=='P'&&letter[2]=='G'&&letter[3]=='G'&&letter[4]=='A')
{
gets(letter1);
//for (i=0;i<=6;i++)
//ck[i]=letter1[i];
for (i=12;i<=22;i++)
L1[i-12]=letter1[i];
L3=letter1[24];
for (i=26;i<=37;i++)
L4[i-26]=letter1[i];
L5=letter1[39];
}
}
}
#int_timer0
timer0_isr()
{
set_timer0(255);
lcd_putc('\f');
lcd_putc("Hello");
delay_ms(2000);
}
void main()
{
int i;
enable_interrupts(GLOBAL);
enable_interrupts(int_rda);
enable_interrupts(INT_TIMER0);
setup_timer_0(RTCC_EXT_L_TO_H|RTCC_DIV_1);
lcd_init();
delay_ms(150);
set_timer0(255);
while(1)
{
for (i=0;i<=15;i++)
lcd_putc(L1[i]);
puts(L1);
delay_ms(1000);
lcd_putc('\f');
delay_ms(500);
}
}
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This is my test code |
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