. But for timer one you must enable the secondary oscillator. This is described in section 19. Sometimes datasheets can be a pain in the as* to read. But you must push your self to read it and understand it. In your case you MUST emphasize on section 5 and 19.
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//timer1 settings
TMR1H=0x80;
TMR1L=0;
T1CON=0b10001111;
TMR1IE=1;// PIE1 register
PEIE=1; //INTCON register
PIR1=0; // Clear all bits PERIPHERAL INTERRUPT REQUEST REGISTER 1
TMR1GE=1;
GIE=1;
TMR1ON=1;
INTCON=0b11100000;static void interrupt
isr(void) // Here is interrupt function - the name is unimportant.
{
if(TMR1IF)
{// Was this a timer overflow?
TMR1IF=0;//Clear interrupt flag, ready for next
TMR1H=0x80;
//If we set TMR1 to start at 0x8000 (32768), the TMR1 will overflow every 1 second
regn_tick=1;
sec++;
sec_tick=1;
if (sec==60)
{
minut_tick=1;
sec=0;
}
}
}You still have not answered the question or at least I do not understand what you are saying.
Do you remember your basic debugging skills? Set a breakpoint inside the ISR on the first line. If it stops there and the timer's interrupt flag is set then it is being called.
ok, just run it with breakpoints it will just loop in the endlees loop, cause it do not get any input from extern xtal.
I don't know what this means. Does this mean it is working in simulation mode?
ok was to the info to set up in stimul.
Shouldn't this external crystal correspont with the configuration bits?
#include <htc.h>
//#include <stdio.h>
#include <stdlib.h>
#include "lcd.h"
__CONFIG (FCMEN_ON & IESO_OFF & BOREN_OFF & CP_OFF & MCLRE_OFF & PWRTE_ON & WDTE_OFF & FOSC_INTOSC);
__CONFIG (LVP_ON & LPBOR_OFF & BOREN_ON & STVREN_ON & WRT_OFF);
#define LED RC0
#define _XTAL_FREQ 4000000
//global defs
volatile unsigned char week_day;
volatile bit timer_tick;
volatile bit blink;
const char * const day_of_week_names[] = {"Monday feels so bad",
"Tuesday feel better",
"Wednesday don't go ",
"Thursday goes slow ",
"Friday on my mind ",
"Saturday Night Live",
"Sunday be sporty "
};
static void interrupt
isr(void) // Here is interrupt function - the name is
// unimportant.
{
if(TMR1IF)
{// Was this a timer overflow?
TMR1IF=0;//Clear interrupt flag, ready for next
TMR1H=0x80;
//If we set TMR1 to start at 0x8000 (32768), the TMR1 will overflow every 1 second
timer_tick=1;
}//we are done here
}
void setup(void)
{
IRCF0=1;
IRCF1=0;
IRCF2=1;
IRCF3=1;//4MHz clock speed
//REGISTER 5-1: OSCCON: OSCILLATOR CONTROL REGISTER
// bit 6-3 IRCF<3:0>: Internal Oscillator Frequency Select bits
//1111 = 16MHz
//1110 = 8MHz
//1101 = 4MHz
//1100 = 2MHz
//1011 = 1MHz
//1010 = 500 kHz(1)
//1001 = 250 kHz(1)
//1000 = 125 kHz(1)
//0111 = 500 kHz (default upon Reset)
//0110 = 250 kHz
//0101 = 125 kHz
//0100 = 62.5 kHz
//001x = 31.25 kHz
//000x = 31kHz LF
TRISA0=0;
TRISC=0b01111000;//RC0-RC2 out,RC3-RC6 in,RC7 out
TRISB=0; //All port B output
GIE = 0; // Global interrupt disable just in case
ANSELA=0;
ANSELB=0;
ANSELC=0;//turn off all analog functions
//timer1 settings
TMR1H=0x80;
TMR1L=0;
//T1CON=0b00000110;//used during debug
T1CON=0b10001100;
// See datasheet REGISTER 19-1: T1CON: TIMER 1 CONTROL REGISTER
// TMR1CS<1:0> T1CKPS<1:0> T1OSCEN !T1SYNC — TMR1ON
//bit 7-6 TMR1CS<1:0>: Timer1 Clock Source Select bits
//11 =Timer1 clock source is Capacitive Sensing Oscillator (CAPOSC)
//10 =Timer1 clock source is pin or oscillator:
//If T1OSCEN = 0:
//External clock from T1CKI pin (on the rising edge)
//If T1OSCEN = 1:
//Crystal oscillator on SOSCI/SOSCO pins
//01 =Timer1 clock source is system clock (FOSC)
//00 =Timer1 clock source is instruction clock (FOSC/4)
//bit 5-4 T1CKPS<1:0>: Timer1 Input Clock Prescale Select bits
//11 = 1:8 Prescale value
//10 = 1:4 Prescale value
//01 = 1:2 Prescale value
//00 = 1:1 Prescale value
//bit 3 T1OSCEN: LP Oscillator Enable Control bit
//1 = Dedicated Timer1 oscillator circuit enabled
//0 = Dedicated Timer1 oscillator circuit disabled
//bit 2 T1SYNC: Timer1 Synchronization Control bit
//1 = Do not synchronize asynchronous clock input
//0 = Synchronize asynchronous clock input with system clock (FOSC)
//bit 1 Unimplemented: Read as ‘0’
//bit 0 TMR1ON: Timer1 On bit
//1 = Enables Timer1
//0 = Stops Timer1 and clears Timer1 gate flip-flop
TMR1GE=0;
//T1GCON: TIMER1 GATE CONTROL REGISTER
//bit 7 TMR1GE: Timer1 Gate Enable bit
//If TMR1ON = 0:
//This bit is ignored
//If TMR1ON = 1:
//1 = Timer1 counting is controlled by the Timer1 gate function
//0 = Timer1 counts regardless of Timer1 gate function
//Timer1 Interrupt prepare
TMR1IE=1;// PIE1 register
PEIE=1; //INTCON register
PIR1=0; // Clear all bits PERIPHERAL INTERRUPT REQUEST REGISTER 1
//todo now in order to generate interrupt GEI=1 and TMR1ON=1
//setup LCD
lcd_init();
lcd_goto(0); // select first line
//set the globals
week_day=4;
timer_tick=0;
blink=0;
//other misc settings
timer_tick=0;//clear the tick
}
void lcd_format_and_send(void)
{ blink=!blink;
LED=blink;
if (blink) lcd_puts("Next LED will be off");
else lcd_puts("Next LED will be on ");
lcd_goto(0x40); // Select second line
//lcd_puts("day of week ");
//lcd_putch(week_day+48);
lcd_puts(day_of_week_names[week_day]);
lcd_goto(0x00);
}
void main (void)
{ setup();
GIE=1;
TMR1ON=1;
while (1)
{
if (timer_tick)
{
week_day++;
if (week_day==7) week_day=0;
lcd_format_and_send();//send time to LCD
timer_tick=0;
//timer_tick=1;//just for debug
}// end if (timer_tick) Memo to my self put all this in sub function
}//end while endless loop
}//End main
Again. You are not providing enough information. We cannot see you project. You need to tell us what you can see.
