flash1.c

Cygnal公司的著名产品C8051f系列单片机

////////////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<len;i++)	//copy BufFrom to FLASH with *pwriter
		{	
			*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<len;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<len;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
}