RTOS và ngắt khi giao tiếp rs232?

[it4rb]

Trong phần help của nó có cái này,vừa xài ngắt,vừa xài RTOS, ko biết đúng ý bác ko:

/////////////////////////////////////////////////////////////////

///   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();

}