164display_test.c

silicon lab 单片机C8051F020 控制74LS164的程序

// Target:         C8051F32x
// Tool chain:     Keil C51 8.16 
// Command Line:   None
//
// Release 1.0
//    -Initial Revision (TP)
//    -2008-11-17
//
//-----------------------------------------------------------------------------
// Includes and Device-Specific Parameters
//-----------------------------------------------------------------------------

#include <C8051F320.h>
#include "164display.h"

unsigned char  key_data,key_state=0xff  ;
bit KEY_FLAG=1;
#define  KEY P2

//-----------------------------------------------------------------------------
// Function PROTOTYPES
//-----------------------------------------------------------------------------
void PORT_Init (void);
void delay_ms(unsigned int ms);
void Key_Scan();
void Key1()	;
void Key2()	;
//-----------------------------------------------------------------------------
// MAIN Routine
//-----------------------------------------------------------------------------

void main ()
{  
   PCA0MD &= ~0x40;                    // WDTE = 0 (disable watchdog timer)

   OSCICN |= 0x03;                     // Set internal oscillator to highest
   PORT_Init ();
   while(1)
   {
	    
		Key_Scan();
	 	delay_ms(1);	
		
	}
}

//-----------------------------------------------------------------------------
// Initialization Routines
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// PORT_Init
//-----------------------------------------------------------------------------
void PORT_Init ()
{
   P0MDOUT = 0x00;                     // All P0 pins open-drain output

   P1MDOUT |= 0xff;                    // Make the p1 a push-pull
                                       // output
   P2MDIN |= 0x03;					   // for key

   XBR0 = 0x00;                        // Enable SMBus pins
   XBR1 = 0x40;                        // Enable crossbar and weak pull-ups

   P1 = 0xFF;
}

//-----------------------------------------------------------------------------

void delay_ms(unsigned int ms)
{
	unsigned int delay_cx;
	for(;ms>0;ms--)
	{
		for(delay_cx=0;delay_cx<123*12;delay_cx++);
	}
}
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
void Key_Scan()
{
	KEY=0XFF;
	key_data=KEY;				
	if(key_data!=0xff)
	{
		//有按键
		key_state<<=1;
		if(!key_state)
		{
			if(KEY_FLAG)
			{
				//按键刚按下
				KEY_FLAG=0;
				key_data=KEY;
				if(key_data==0XFE)		Key1();
				if(key_data==0XFD)		Key2();				
			}
			/*
			else
			{
				//连续按建
			}
			*/
		}				
	}
	else
	{
		//没有按键
		key_state=(key_state<<1)|0x01;
		if(key_state==0xff)
		{
			KEY_FLAG=1;			
		}
	}			
}
//-----------------------------------------------------------------------------
void Key1()
{
	Led_Display (1);	
}

void Key2()
{
	Led_Display (2);	
}

//-----------------------------------------------------------------------------
// End Of File