最新的x25045驱动

				/*------————————————————————
				〖说明〗这是一款老的芯片驱动程序，它可兼容x25020的驱动
				C51编写的
				—————————————————————*/
				/* x25045的读写程序 用c51写的 */
				#define CS P2.7 /*单片机p2.7为片选 可以改为你的实际引脚 */
				#define SO P2.6 /*数据输出 */
				#define SK P2.5 /* 时钟 */
				#define SI P2.4 /* 数据输入*/ 
				
				#define WREN 0x06
				#define WRDI 0x04
				#define RDSR 0x05
				#define WRSR 0x01
				#define READ0 0x03
				#define READ1 0x0b
				#define WRITE0 0x02
				#define WRITE1 0x0a
				
				unsigned char Read8()
				{
				bit bData;
				unsigned char cLoop;
				unsigned char cData;
				for(cLoop=0;cLoop				{
				SK=1;
				SK=0;
				bData=SO;
				cData				if(bData)
				{
				cData|=0x01;
				}
				}
				return cData;
				}
				
				void Write8(unsigned char cData)
				{
				unsigned char cLoop;
				for(cLoop=0;cLoop				{
				if((cData&0x80)==0)
				{
				SI=0;
				}
				else
				{
				SI=1;
				}
				SK=0;
				SK=1;
				cData				}
				}
				
				unsigned char ReadSR()
				{
				unsigned char cData;
				CS=0;
				Write8(RDSR);
				cData=Read8();
				CS=1;
				return cData;
				}
				
				unsigned char WriteSR(unsigned char cData)
				{
				unsigned char cTemp;
				cTemp=ReadSR();
				if((cTemp&0x01)==1)
				return 0;
				CS=0;
				Write8(WREN);
				CS=1;
				CS=0;
				Write8(WRSR);
				Write8(cData);
				CS=1;
				return 1;
				}
				
				void Write1B(unsigned char cData,unsigned char cAddress,bit bRegion)
				/* 写入一个字节，cData为写入的数，cAddress为写入地址，bRegion为页 */
				{
				while((ReadSR()&0x01)==1)
				{
				}
				CS=0;
				Write8(WREN);
				CS=1;
				CS=0;
				if(bRegion==0)
				{
				Write8(WRITE0);
				}
				else
				{
				Write8(WRITE1);
				}
				Write8(cAddress);
				Write8(cData);
				SK=0;
				CS=1;
				}
				
				unsigned char Read1B(unsigned char cAddress,bit bRegion)
				/* 读入一个字节，cAddress为读入地址，bRegion为页 */
				{
				unsigned char cData;
				while((ReadSR()&0x01)==1)
				{
				}
				CS=0;
				if(bRegion==0)
				{
				Write8(READ0);
				}
				else
				{
				Write8(READ1);
				}
				Write8(cAddress);
				cData=Read8();
				CS=1;
				return cData;
				}