单片机开发仿真环境keil.c51.v706.Full

				// eeprom.c
				// Christian Kulig, 10/29/02
				
				// This sample demonstrates the usage of the data EEPROM.
				// It counts the number of powerups of the device and
				// saves this value in the EEPROM. From there it is read
				// again, incremented and written back on every power up.
				
				#include  				//Keil header file name
				#include 
				
				#define ADDR 5
				 
				void msec(int x);
				void init(void);
				void brkrst_init(void);
				void EEPROMwrite(unsigned int adr, unsigned char dat);
				unsigned char EEPROMread(unsigned int adr);
				
				unsigned char pus=0;
				
				void main(void)
				{
					init();						// configure ports
					brkrst_init();				// enable break-detect 
					pus=EEPROMread(ADDR);		// read last powerup counter value
					pus++;						// increase it
					EEPROMwrite(ADDR, pus);		// write new value back to EEPROM
				 
					while(1)
					{	
						P2=pus;					// blink current powerup counter
						msec(200);
						P2=0x00;
						msec(200);
					}		
				}
				
				void init(void)
				{
					P1M1 = 0x00;				// push pull except RX
					P1M2 = 0x00;
					P2M1 = 0x00;
					P2M2 = 0xFF;
				
					P0M1 = 0xFF;
					P0M1 = 0x00;
				
					ES = 1;
					EA = 1;
				} 		
				 
				void brkrst_init(void)			// This function allows ISP entry 
												// through the UART break detect
				{
					AUXR1 |= 0x40;				// enable reset on break detect
					SCON = 0x50;				// select the BRG as UART baud rate source
					SSTAT = 0x00;
					BRGR0 = 0x70;				// 9600 BAUD at 11.0592 MHz
					BRGR1 = 0x04;
					BRGCON = 0x03;				// enable BRG
				}
				
				void UART(void) interrupt 4
				{
					RI = 0;						// clear receive interrupt flag
				}
				
				void msec(int x)	//LPC932  11.0592 MHz
				{
					int j=0;
					while(x>=0)
					{
						for (j=0; j						x--;
					}	
				}
				
				void EEPROMwrite(unsigned int adr, unsigned char dat)
				{
					EA=0;										// disable Interrupts during write
					DEECON=(unsigned char)((adr>>8)&0x01);		// mode: write byte, set address
					DEEDAT=dat;									// set write data
					DEEADR=(unsigned char) adr;					// start write
					EA=1;					
					while((DEECON&0x80)==0);					// wait until write is complete
				}
				
				unsigned char EEPROMread(unsigned int adr)
				{
					DEECON=(unsigned char)((adr>>8)&0x01);		// mode: read byte, set adress
					DEEADR=(unsigned char) adr;					// start read
					while((DEECON&0x80)==0);					// wait until read is complete
					return DEEDAT;								// return data
				}