//------------------------------------------------------------------------------------
// hw6b595.c
//------------------------------------------------------------------------------------
// Copyright 2003 NCD.Ltd.
//
// AUTH: Jhonsun
// DATE: 8 Apr 03
//
// This program flashes the green LED and the red LED on the C8051F020 test board .
// Target: C8051F02x
//
// Tool chain: KEIL Eval 'c'
//

//------------------------------------------------------------------------------------
// Includes
//------------------------------------------------------------------------------------

#include <c8051f020.h>
#include <intrins.h>
//sbit MOSI = P0^4;      //define the data pin                
//sbit SCK = P0^2;       //define the clock pin
//bit LED1input;
//bit LED2input;
//#define SETSPICS1       P5 |= 0x10		//P5.7 connect to the RCK
//#define CLRSPICS1   	P5 &= ~(0x10)
//#define SETSPICS2       P5 |= 0x20
//#define CLRSPICS2       P5 &= ~(0x20)
sbit CLK = P0^3;
sbit SH = P0^0;
sbit CLKINH = P0^2;
sbit QH = P0^1;
void SYSCLK_Init (void)
{
   int i;                              // delay counter
   OSCXCN = 0x67;                      // start external oscillator with
                                       // 11.0592MHz 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
}

void delay(unsigned int t)
{
  unsigned int i,j;   //delay counter
  for(i=0;i<t;i++)
    for(j=0;j<10;j++)
	  {
	    _nop_();
       }
}


main()
{
  /* unsigned int  LED[]={0x0001,0x0002,0x0004,0x0008,0x0010,0x0020,0x0040,0x0080,0x0100,0x0200,0x0400,0x0800,0x1000,0x2000,0x4000,0x8000};
 	unsigned int i;  */
	unsigned char xdata j,i;
//	unsigned char LED1,LED2;
	WDTCN = 0xde;
	WDTCN = 0xad;           //關看門狗
//	SYSCLK_Init ();         //初始化時鐘
  //  OSCICN=0x07;
	//for(i=0;i<256;i++);
	//while(!(OSCICN&0x10));
	//OSCICN|=0x80;
	//XBR0    = 0x06;                     // Enable SMBus, SPI0, and UART0
   SYSCLK_Init();
    XBR1    = 0x00;
    XBR2    =0x40;
	P0MDOUT = 0x0d;
	QH = 1;
	SH = 1;
//	P74OUT  = 0x08;
   	  while(1)
	    {
		  i = 0;
		 // CLKINH = 1;
		  
		  CLK = 0;
		  SH = 0;
		 
		  _nop_();
		   _nop_();
		    _nop_();
			 _nop_();
		 
		  //delay(10);
		  SH = 1;
		  _nop_();
		 _nop_();
		 _nop_();
		 _nop_();
		 _nop_();
		 _nop_();
//CLK = 0;
		  //delay(20);
		 CLKINH = 0;
		  for(j=0;j<8;j++)
		  {
		   i = i<<1;
		   CLK = 1;
		   _nop_();
		   _nop_();
		    _nop_();
			 _nop_();
			  _nop_();
			   _nop_();
		   i |=QH;
		 
		   		 

		
//delay(10);
		   CLK = 0;
		   		  _nop_();
 _nop_();
  _nop_();
   _nop_();
    _nop_();
	 _nop_();
	


		  // delay(10);
		   }
		   _nop_();
		   _nop_();


		  		 }

}