c8051单片机源程序

				////////////FLASH读写操作调试程序/////////////////
				//////////flash.c////////////////////////////////////////
				#include "c8051f040.h"
				#include "absacc.h"
				#define LEN 5
				void FlashWrite(unsigned char xdata *pwrite,unsigned char  *BufFrom,unsigned char len){
					/*
					pwrite为FLASH地址指针，采用xdata强制指明指针类型，以保证采用MOVX操作
					BufFrom为数据指针
					len为数据长度
					*/
						unsigned char i;
						WDTCN = 0xde;
						WDTCN = 0xad;// 禁止看门狗
						EA=0;//禁止中断
						SFRPAGE=0x00;
						FLSCL = 0x81;
						PSCTL = 0x03;
						*pwrite=0;		//擦除操作
						PSCTL=0x01;
						for(i=0;i						{	
							*pwrite++=*BufFrom++;
						}
						PSCTL = 0;			 // disable FLASH writes
						FLSCL = 0x80;		 // disable FLASH writes
						EA=1; 
				}
				void FlashRead1(unsigned char code *pread,unsigned char *BufTo,unsigned char len){//采用指针方法实现
					/*
					对FLASH读操作采用MOVC指令，故采用code指针类型
					BufTo为存放读取值的缓冲指针
					len为数据长度
					*/
					unsigned char i;
					for(i=0;i						BufTo[i]=*pread;
						pread++;
					}
				}
				void FlashRead2(unsigned int adr,unsigned char *BufTo,unsigned char len){//采用CBYTE[]读FLASH
					unsigned  i;
					for(i=0;i						BufTo[i]=CBYTE[adr];
						adr++;
						}
				}
				void config(){
				//看门狗禁止
					WDTCN = 0x07;	
				    WDTCN = 0xDE;   
				   	WDTCN = 0xAD;
					SFRPAGE = 0x0F;
				//交叉开关使能，但没有进行外围设备配置
					XBR0 = 0x00;	
					XBR1 = 0x00;	
					XBR2 = 0x40;
				 	XBR3 = 0x00;   
				//管脚输出配置，P0口为开漏输出，其中P0.6接上拉电阻，P0为数字输入口
				 	SFRPAGE = 0x0F;
				 	P0MDOUT = 0x00; 
				 	P1MDIN = 0xFF;  
				//晶振配置，采用内部晶振8分频
					SFRPAGE = 0x0F;
				 	CLKSEL = 0x00;  
					OSCXCN = 0x00;	
					OSCICN = 0x84;	
				}
				void main(){
					xdata unsigned char teststr1[LEN]={0x30,0x32,0x34,0xa8,0xa7};
					xdata unsigned char readdata1[LEN];
					xdata unsigned char readdata2[LEN];
					float pi=3.14159;
					idata int tt=-345;
					xdata float readpi=0.0;
					xdata int readtt=0;
					config();
					FlashWrite(512*20,teststr1,LEN);
					FlashWrite(512*21,teststr1,LEN);
					FlashWrite(512*21+20,&pi,sizeof(float));
					FlashWrite(512*22,&tt,sizeof(int));
					FlashRead1(512*20,readdata1,LEN);
					FlashRead1(512*21,readdata2,LEN);
					FlashRead1(512*21+20,&readpi,sizeof(float));
					FlashRead2(512*22,&readtt,sizeof(int));
					while(1);//可在此设断点观察写的数据与读的数据是否一致
				}