[SOLVED] NEED HELP to move further in 8051

[basavaraj.mr]

Hai,

Am struck in activating the interrupt in 8051.
Am trying for total of 4 inputs,out of which one is more priority.
Basically am using "while loop" for these three inputs .

and i don't no how to give prioritize input ..

For info: MCU is Philips 89v51RD2



Pls post some reference code for the above.


Pls plz plz .......

 

[shamikrudra]

your question is not very clear
pls give us more details like circuit diagram and code for solving your problem.
or read 8051 book by mazidi.

 

[microlab]

hi

there are two external interrupts and two timer/counter interrupts can be accomplished with the standard 8051 devises.
if you can explain the actual requirement we may be able to help you better

ml

 

[dmahale007]

interrupt priority can be set using ip register. rest of the question is pretty foggy, plz evaluate if u want help

 

[basavaraj.mr]

This is ISR function:
void ISR_ex0(void)interrupt 0
{

lcdcmd(0x01);
lcd_line1(0);
lcd_puts("Pls cal to -->");
lcd_line2(0);
lcd_puts("9844098440");


}
In the main:

void main()
{

<do some thing>

IE=0x81;
while(1)
{
}
}


when ever i powered up the unit this above code is executing automatically irrespective of the INT0 pin in the IC

Pls help me to find out the problem.

Am struck to initialize the external hardware interrupt.

In my project am using P89v51rd2 IC.

 

[basavaraj.mr]

Hai here am posting clear details pls help me .


This is ISR function:
void ISR_ex0(void)interrupt 0
{

lcdcmd(0x01);
lcd_line1(0);
lcd_puts("Pls cal to -->");
lcd_line2(0);
lcd_puts("9844098440");


}
In the main:

void main()
{

<do some thing>

IE=0x81;
while(1)
{
}
}


when ever i powered up the unit this above code is executing automatically irrespective of the INT0 pin in the IC

Pls help me to find out the problem.

Am struck to initialize the external hardware interrupt.

In my project am using P89v51rd2 IC.