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/////////////////////////////////////////////////////////////////
///
This file demonstrates how to use the real time
///
///
///
operating systems messaging functions
///
///
///
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)
int8 count;
// each task will now be given a two byte queue
#task(rate=1000ms,max=100ms,queue=2)
void The_first_rtos_task ( );
#task(rate=500ms,max=100ms,queue=2)
void The_second_rtos_task ( );
void The_first_rtos_task ( ) {
// the function rtos_msg_poll will return the number of messages in the
// current tasks queue
// always make sure to check that their is a message or else the read
// function will hang
if(rtos_msg_poll ( )>0){
// the function rtos_msg_read, reads the first value in the queue
printf("messages recieved by task1 : %i\n\r",rtos_msg_read ( ));
// the funciton rtos_msg_send, sends the value given as the
// second parameter to the function given as the first
rtos_msg_send(The_second_rtos_task,count);
count++;
}
}
void The_second_rtos_task ( ) {
rtos_msg_send(The_first_rtos_task,count);
if(rtos_msg_poll ( )>0){
printf("messages recieved by task2 : %i\n\r",rtos_msg_read ( ));
count++;
}
}
void main ( ) {
count=0;
rtos_run();
}
/////////////////////////////////////////////////////////////////
///
This file demonstrates how to use the real time
///
///
///
operating systems yield function
///
///
///
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)
#task(rate=1000ms,max=100ms,queue=2)
void The_first_rtos_task ( );
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