config.c

UCOS在C8051上的最简单移植

#include "..\ucos-ii\includes.h"

#define SYSCLK 22118400

extern void SYSCLK_Init(void);
extern void Port_Init(void);

void config(void)
{	
	 WDTCN = 0xde;                          
	 WDTCN = 0xad;	

 	 SYSCLK_Init ();
 	 Port_Init ();  	


}


void SYSCLK_Init (void)
{
   char old_SFRPAGE = SFRPAGE; 
	 
   unsigned int i;                                 

   SFRPAGE = CONFIG_PAGE;              // Switch to Configuration Page

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

   for (i=0; i <5000; i++) ;           // XTLVLD blanking interval (>1ms)

   while (!(OSCXCN & 0x80)) ;          // Wait for crystal osc. to settle

   //RSTSRC = 0x04;                      // enable missing clock detector reset
	 	
   CLKSEL = 0x01;                      // change to external crystal

   OSCICN = 0x83;                      // Enable internal oscillator	

   SFRPAGE = old_SFRPAGE;              // restore SFRPAGE
}


void PORT_Init (void)
{
	  char SFRPAGE_SAVE = SFRPAGE;  // Save Current SFR page     

    SFRPAGE   = CONFIG_PAGE;
    P2MDOUT   = 0x03;
    XBR2      = 0x40;
    SFRPAGE = SFRPAGE_SAVE;    // Restore SFR page

}