i have a program in microc in which i'll show a message throw a LCD 16*2 and i use an interruption of timer0 but the simulation in Proteus isis don't work
this is my program if there ara mistakes
unsigned cnt;
void interrupt()
{
cnt++; // Increment value of cnt on every interrupt
TMR0 = 96;
INTCON.INTF=0; // Set T0IE, clear T0IF
}
void main()
{
OPTION_REG = 0x84; // Assign prescaler to TMR0
TRISB = 0;
TMR0 = 96; // Timer0 initial value
INTCON = 0x90; // Enable TMRO interrupt
cnt = 0; // Initialize cnt
lcd_init(&PORTB); //initialisation de l'afficheur
do {
if (cnt == 400)
{
lcd_out(1,1,"A");
//delay_ms(1000);
cnt = 0; // Reset cnt
}
} while(1);
}
interruption
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- Posts: 1
- Joined: 05 Jun 2010 15:07
- slavisa.zlatanovic
- mikroElektronika team
- Posts: 1321
- Joined: 07 Apr 2009 09:39
Re: interruption
#2 Post by slavisa.zlatanovic » 07 Jun 2010 13:39
Hi!
It seems that you've forgotten to turn ON interrupts(GIE bit in INTCON).
Try the code below (written for 18F887 MCU):
Best regards
Slavisa
It seems that you've forgotten to turn ON interrupts(GIE bit in INTCON).
Code: Select all
INTCON = 0xA0; // GIE=1; TMRO=1;
Try the code below (written for 18F887 MCU):
Code: Select all
unsigned cnt;
void interrupt() {
cnt++; // Increment value of cnt on every interrupt
TMR0 = 96;
INTCON = 0x20; // Set T0IE, clear T0IF
}
void main() {
OPTION_REG = 0x84; // Assign prescaler to TMR0
ANSEL = 0; // Configure AN pins as digital I/O
ANSELH = 0;
TRISB = 0; // PORTB is output
PORTB = 0xFF; // Initialize PORTB
TMR0 = 96; // Timer0 initial value
INTCON = 0xA0; // Enable TMRO interrupt
cnt = 0; // Initialize cnt
do {
if (cnt == 400) {
PORTB = ~PORTB; // Toggle PORTB LEDs
cnt = 0; // Reset cnt
}
} while(1);
}
Slavisa
Best regards
Slavisa
Slavisa
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