ex1.c

UCOSII在C8051F单片机上的移植

#include <includes.h>
#include <serial.h>

void TaskA(void*) reentrant;
void TaskB(void*) reentrant;
void TaskC(void*) reentrant;
void SYSCLK_Init (void) reentrant;


OS_STK TaskStartStkA[MaxStkSize];//注意：在ASM文件中设置?STACK空间为40H即64。
OS_STK TaskStartStkB[MaxStkSize];
OS_STK TaskStartStkC[MaxStkSize];

void main(void)
{
    // Disable watchdog timer
	EA=0;
   WDTCN = 0xde;
   WDTCN = 0xad;
	EA=1;

//	SYSCLK_Init();
	
	OSInit();
  
    InitTimer0();
    InitSerial();
    InitSerialBuffer();
    
    OSTaskCreate(TaskA, (void *)0, TaskStartStkA,2);
    OSTaskCreate(TaskB, (void *)0, TaskStartStkB,3);
    OSTaskCreate(TaskC, (void *)0, TaskStartStkC,4);
 
    OSStart();
}


void TaskA(void *pdat) reentrant
{
    pdat=pdat;
    PrintStr("\nuC/OS-II is running.\n");
    
    for(;;){
        PrintStr("Task A is active.\n");
        OSTimeDly(2);    
    }    
}

void TaskB(void *pdat) reentrant
{
    pdat=pdat; 
    
    for(;;){
        PrintStr("Task B is active.\n");
        OSTimeDly(4);    
    }    
}

void TaskC(void *pdat) reentrant
{
    pdat=pdat; 
    
    for(;;){
        PrintStr("Task C is active.\n\n");
        OSTimeDly(6);    
    }    
}

void SYSCLK_Init (void) reentrant
{
   int i;                           // delay counter

   OSCXCN = 0x67;                   // start external oscillator with
                                    // 22.1184MHz crystal

   for (i=0; i < 256; i++) ;        // Wait for osc. to start up
   
   while (!(OSCXCN & 0x80)) ;       // Wait for crystal osc. to settle

   OSCICN = 0x88;                   // select external oscillator as SYSCLK
                                    // source and enable missing clock
                                    // detector

}