#include#include #include #include //------------------------------------------#define IicWpDirOut P6DIR |= BIT5#define IicWpLow P6OUT &=~ BIT5 #define IicWpHig P6OUT |= BIT5#define IicSclDirOut P6DIR |= BIT6#define IicSclLow P6OUT &=~ BIT6 #define IicSclHig P6OUT |= BIT6#define IicSdaDirOut P6OUT &= ~BIT7#define IicSdaLow P6DIR |= BIT7 #define IicSdaHig P6DIR &=~ BIT7#define IicSdaInSt P6IN & BIT7bool AckErr;//------------------------------ *** - 时间延时 - *** ------------------------------//void Delay(unsigned int count){ unsigned int i; _NOP(); _NOP(); for(i=count; i>0; i--);}void IIcDelay(void){ _NOP();}//-----***-IIC初始化-***-----//void IicInit(void){IicWpDirOut;IicSdaDirOut;IicSclDirOut;IicWpHig;IicSdaHig;IicSclHig;}//-----***-IIC启示-***-----//void IicStart(void) { IicSdaHig;//IicSda=1; IIcDelay(); IicSclHig;//IicScl=1; IIcDelay(); IicSdaLow;//IicSda=0; IIcDelay(); IicSclLow;//IicScl=0; IIcDelay();}//-----***-IIC停止-***-----//void IicStop(void) { IicSdaLow;//IicSda=0; IIcDelay(); IicSclHig;//IicScl=1; IIcDelay(); IicSdaHig;//IicSda=1; IIcDelay();}//-----***-IIC应答-***-----//void SendAcknowledge(bool ack) { IicSdaDirOut; if(ack)//IicSda=ack; { IicSdaHig; } else { IicSdaLow; } IIcDelay(); IicSclHig;//IicScl=1; IIcDelay(); IicSclLow;//IicScl=0; IIcDelay();} //-----***-从slave端读取一个数据-***-----//unsigned char IicReceiveByte(void){ unsigned char i; unsigned char bytedata=0; IicSdaDirOut; IicSdaHig;//IicSda=1; for(i=0;i<8;i++) { IicSclHig;//IicScl=1; IIcDelay(); bytedata<<=1; if(IicSdaInSt) { bytedata |=0x01; } else { bytedata &=0xfe; } IicSclLow;//IicScl=0; IIcDelay(); } IicSdaDirOut; return bytedata;}//-----***-传送一个 Byte 数据到 slave-***-----//void IicSentByte(unsigned char DataByte) { unsigned char i; for(i=0;i<8;i++) { if(DataByte & 0x80) { IicSdaHig;//IicSda=1; } else { IicSdaLow;//IicSda=0; } DataByte <<=1; IIcDelay(); IicSclHig;//IicScl=1; IIcDelay(); IicSclLow;//IicScl=0; IIcDelay(); } IicSdaHig;//IicSda=1;-----Y------D---IicSdaDirIn IIcDelay(); IicSclHig;//IicScl=1; IIcDelay(); IicSclLow;//IicScl=0; IIcDelay();}//-----***-无扇区读---多字节-***-----////读取指定器件无扇区指定地址多字节数据到指定地址//Device=器件地址---单字节//DataAdd=字节地址---单字节void IicMuchByteRead(unsigned char DataAdd,unsigned char *DataDptr,unsigned char DataLend){ unsigned char i; _DINT(); WDT(); IicInit(); IicStart(); IicSentByte(0xa0); IicSentByte(DataAdd); IicStart(); IicSentByte(0xa1); for(i=DataLend-1;i>0;i--) { *DataDptr=IicReceiveByte(); DataDptr++; SendAcknowledge(0); } *DataDptr=IicReceiveByte(); SendAcknowledge(1); IicStop(); WDT(); Delay(500); _EINT();}//-----***-无扇区写---多字节-***-----////写入指定器件无扇区指定地址中的多字节数据//Device=器件地址---单字节//DataAdd=字节地址---双字节//DataByte=被存放数据的地址//DataLend=被存放数据的长度void IicMuchByteWrite(unsigned char DataAdd,unsigned char *DataDptr,unsigned char DataLend){ unsigned char i; _DINT(); WDT(); IicInit(); IicWpLow; IicStart(); IicSentByte(0xa0); IicSentByte(DataAdd); for(i=DataLend;i>0;i--) { IicSentByte(*DataDptr); DataDptr++; } IicStop(); WDT(); Delay(3500); IicWpHig; _EINT();}//---特别说明//---利用430芯片来模拟IIC，是不能够把SDA设置为输出模式而是//---设置为输入，然后利用方向控制器来输出高或者低//---如下：#define IicSdaDirOut P6OUT &= ~BIT7#define IicSdaLow P6DIR |= BIT7 #define IicSdaHig P6DIR &=~ BIT7#define IicSdaInSt P6IN & BIT7
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