Trong phần help của nó có cái này,vừa xài ngắt,vừa xài RTOS, ko biết đúng ý bác ko:
Code:
/////////////////////////////////////////////////////////////////
/// This file demonstrates how to create a basic command ///
/// line using the serial port withought having to stop ///
/// RTOS operation, this can also be considered a ///
/// semi kernal for the RTOS. ///
/// ///
/// this demo makes use of the PIC18F452 prototyping board ///
/////////////////////////////////////////////////////////////////
#include <18F452.h>
#use delay(clock=20000000)
#use rs232(baud=9600,xmit=PIN_C6,rcv=PIN_C7)
#use rtos(timer=0,minor_cycle=100ms)
#define RED PIN_B5
#define GREEN PIN_A5
#include <string.h>
// this character array will be used to take input from the prompt
char input [ 30 ];
// this will hold the current position in the array
int index;
// this will signal to the kernal that input is ready to be processed
int1 input_ready;
// different commands
char en1 [ ] = "enable1";
char en2 [ ] = "enable2";
char dis1 [ ] = "disable1";
char dis2 [ ] = "disable2";
#task(rate=1000ms,max=100ms)
void The_first_rtos_task ( );
#task(rate=1000ms,max=100ms)
void The_second_rtos_task ( );
#task(rate=500ms,max=100ms)
void The_kernal ( );
// serial interupt
#int_rda
void serial_interrupt ( )
{
if(index<29) {
input [ index ] = getc ( ); // get the value in the serial recieve reg
putc ( input [ index ] ); // display it on the screen
if(input[index]==0x0d){ // if the input was enter
putc('\n');
input [ index ] = '\0'; // add the null character
input_ready=TRUE; // set the input read variable to true
index=0; // and reset the index
}
else if (input[index]==0x08){
if ( index > 1 ) {
putc(' ');
putc(0x08);
index-=2;
}
}
index++;
}
else {
putc ( '\n' );
putc ( '\r' );
input [ index ] = '\0';
index = 0;
input_ready = TRUE;
}
}
void The_first_rtos_task ( ) {
output_low(RED); delay_ms(50); output_high(RED);
}
void The_second_rtos_task ( ) {
output_low(GREEN); delay_ms(20); output_high(GREEN);
}
void The_kernal ( ) {
while ( TRUE ) {
printf ( "INPUT:> " );
while(!input_ready)
rtos_yield ( );
printf ( "%S\n\r%S\n\r", input , en1 );
if ( !strcmp( input , en1 ) )
rtos_enable ( The_first_rtos_task );
else if ( !strcmp( input , en2 ) )
rtos_enable ( The_second_rtos_task );
else if ( !strcmp( input , dis1 ) )
rtos_disable ( The_first_rtos_task );
else if ( !strcmp ( input , dis2 ) )
rtos_disable ( The_second_rtos_task );
else
printf ( "Error: unknown command\n\r" );
input_ready=FALSE;
index=0;
}
}
void main ( ) {
// initialize input variables
index=0;
input_ready=FALSE;
// initialize interrupts
enable_interrupts(int_rda);
enable_interrupts(global);
rtos_run();
}