//-----------------------------------------------------------------------------
// F00x_Ports_SwitchLED.c
//-----------------------------------------------------------------------------
// Copyright 2005 Silicon Laboratories, Inc.
// http://www.silabs.com
//
// Program Description:
//
// This program demonstrates how to configure port pins as digital inputs
// and outputs.  The C8051F005 target board has one push-button switch 
// connected to a port pin and one LED.  The program constantly checks the 
// status of the switch and if it is pushed, it turns on the LED.
//
//
// How To Test:
//
// 1) Download code to a 'F005 target board
// 2) Ensure that the J1 and J3 headers are shorted
// 3) Push the button (P1.7) and see that the LED turns on 
//
//
// FID:            00X000002
// Target:         C8051F00x
// Tool chain:     Keil C51 7.50 / Keil EVAL C51
// Command Line:   None
//
// Release 1.0
//    -Initial Revision (GP)
//    -15 NOV 2005
//

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

#include <c8051f000.h>                 // SFR declarations

#define SYSCLK             11059200  // SYSCLK in Hz (16 MHz internal
                                       // oscillator)
                                       // the internal oscillator has a
                                       // tolerance of +/- 20%
//-----------------------------------------------------------------------------
// Function Prototypes
//-----------------------------------------------------------------------------
sbit rd     = P1^7;
sbit re     = P1^5;
sbit wr     = P1^6;
sbit addr0	= P1^0;
sbit addr1	= P1^1;
sbit addr2	= P1^2;
sbit addr3	= P1^3;
sbit addr4	= P1^4;

sbit data0	= P2^0;
sbit data1	= P2^1;
sbit data2	= P2^2;
sbit data3	= P2^3;
sbit lcd_en = P3^0;

unsigned  int n,m,l;
void write (int addr, int datain);
unsigned int read();
void OSCILLATOR_Init (void);           
void PORT_Init (void);
void delay(int time_ms);


//-----------------------------------------------------------------------------
// Initialization Subroutines
//-----------------------------------------------------------------------------

unsigned int read()
{
   unsigned int data_rd;
   PRT2CF  &= 0xf0; 
   P2=0xff;
   rd=0;
   data_rd=P2;
   data_rd &=0x0f;

   rd=1;
   PRT2CF  |= 0xff; 

   return data_rd;

}

//-----------------------------------------------------------------------------
// OSCILLATOR_Init
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
void OSCILLATOR_Init (void)
{
   OSCICN |= 0x03;                     // Configure internal oscillator for
   OSCXCN=0xff;                                    // its maximum frequency (24.5 Mhz)

}

//-----------------------------------------------------------------------------
// PORT_Init
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
void PORT_Init (void)
{
   PRT1CF  |= 0xff;                     // P1.6 is push-pull
   PRT2CF  |= 0xff;                     // P1.6 is push-pull

//   PRT0CF  |= 0xff;                     // P1.6 is push-pull
//   PRT3CF  |= 0xff;                     // P1.6 is push-pull
                                      // P1.7 is open-drain
   P1     |= 0xa0;                     // Set P1.7 latch to '1'
   XBR0    = 0x00;
   XBR1    = 0x00;
   XBR2    = 0x40;                     // Enable crossbar and enable
                                       // weak pull-ups
}

void write (int addr, int datain)
{
    char pp;
    PRT2CF  |= 0xff; 
    pp=addr;
	pp|= 0xA0;
	P1 =pp;
 
	P2=datain;
	wr=1;	
	wr=0;

}


//-----------------------------------------------------------------------------
// main() Routine
//-----------------------------------------------------------------------------

void main (void)
{
   unsigned int temp1,temp2,xor1,wei1,wei2,temp_wei;
   int i1,i2,i3,i4;
   WDTCN = 0xde;                       // Disable watchdog timer
   WDTCN = 0xad;
   OSCILLATOR_Init ();                 // Initialize Oscillator
   PORT_Init();                        // Initialize Port I/O
   lcd_en=0;
  for(;;)
  {
    write(0,14); 
    delay(100);
    write(0,13); 
    delay(100);
    write(0,11); 
    delay(100); 
    write(0,7); 
    delay(100);          // end of while(1)
   }
}                                      // end of main()


//-----------------------------------------------------------------------------
// Interrupt Service Routines
//-----------------------------------------------------------------------------

void delay(int time_10ms)
{

	for (n=0;n<=time_10ms;n++)
	{
		for(m=0;m<=10;m++)
		{
			for(l=0;l<=80;l++) ; 
		}
	}
}
//-----------------------------------------------------------------------------
// End Of File
//-----------------------------------------------------------------------------