用了自己写的起动总线和停止总线，终于可以成功
// PROGRAM : 4-17.c 2011.0521
// FUNCTION : I2C Master/Slave Mode Demo Program By Steven
// Note : Configuration Option Setting--
// SIM Function = Enable
//void I2C_START(void);
//void I2C_STOP(void);
//void WriteByte(unsigned short);
//unsigned short ReadByte(void);
//void CheckACK(void);
//void PAUSEIIC(unsigned short);
//void I2C_INIT(void);
//void INIT_TVP5150(void);
//void IICWRITE_ADDRSSDATA(unsigned char addrss,unsigned char data);
//#pragma rambank0 //BIT Data Type Must in Bank 0
//bit RxFlag,DeviceFlag;
//unsigned short RxData,TxData;
#include "HT68F30.h"
#include "ht68f30iic.h"const unsigned char IICADDRSS=0XB8;//I2CSEL接做VD1_OUT7的话地址是0XB8,I2CSEL=0，地址是0XBAvoid I2C_INIT(void)
{_cp0c=0x08; _cp1c=0x08; //_acerl=0; //Disable CP0/CP1/ADCWIDEO_PWDN_C=0;//把PWN设置成为输出状态WIDEO_PWDN=0;//设置时钟频率WIDEO_RESET_C=0;//把复位端口设置成输出状态WIDEO_RESET=1; //低电平进行复位 置成1保证处在正常工作状态
// PWR_EN5150C=0;
// PWR_EN5150=1;//电源供电给5150//SEG_Port=0; SEG_PortC=0; //Clear & Config SEG_Port as O/P//ID_PortC=0xFF; ID_Pull=0xFF; //ID_Port as I/P & Enable Pull-up//FG_LED=0; FG_LEDC=0; //Clear FG_LED & Config as O/P//_sima=GetID()<<1; //Get ID from DIP SW//_simc0=0b11000000; //Select I2C Slave Mode//_mf2e=1; _sime=1; _simen=1; _emi=1; //Enable Interrupt and SIM Function
}
void INIT_TVP5150(void)
{ unsigned char data;
/* unsigned int k;k=10;while(k--){ SCL=0; SDA=0; //Set SCL=0, SDA=0//PAUSEIIC(10);_delay(10);SCL=1; SDA=1; //Set SCL=0, SDA=0 //PAUSEIIC(10);_delay(10);}//I2C_INIT();//开始IIC前开始的初始化工作IICWRITE_ADDRSSDATA(0x03,0x8F);//2. 杂项控制寄存器k=10;SCLC=0;SDAC=0;while(k--){ SCL=0; SDA=0; //Set SCL=0, SDA=0//PAUSEIIC(10);_delay(10);SCL=1; SDA=1; //Set SCL=0, SDA=0 //PAUSEIIC(10);_delay(10);}data =IICREAD_ADDRSSDATA(0x03);//0x0D默认值是0x47 k=10;while(k--){ SCL=0; SDA=0; //Set SCL=0, SDA=0//PAUSEIIC(10);_delay(10);SCL=1; SDA=1; //Set SCL=0, SDA=0 //PAUSEIIC(10);_delay(10);}//if(data!=0)if(data==0x8F){Test_Pc6C=0;Test_Pc6=1; _tmpc0=0;//取消PC5引脚的复用功能Test_Pc5C=0; //如果从机应答的话把这个引脚电平拉高Test_Pc5=1; }*/IICWRITE_ADDRSSDATA(0x03,0x8F);//2. 杂项控制寄存器IICWRITE_ADDRSSDATA(0x0D,0x40);//3. 输出和数据比率选择寄存器 }
void IICWRITE_ADDRSSDATA(unsigned char addrss,unsigned char data)
{I2C_START();WriteByte(IICADDRSS);CheckACK();I2C_START();WriteByte(addrss); CheckACK();WriteByte(data);CheckACK();_delay(64);//5150要求有64us的延时I2C_STOP();
}
unsigned char IICREAD_ADDRSSDATA(unsigned char addrss)
{unsigned char data;I2C_START();WriteByte(0XB8);//写器件地址CheckACK();WriteByte(addrss);//写寄存器地址CheckACK();//_delay(64);I2C_STOP();I2C_START();WriteByte(0XB9);//写器件地址//_delay(64);CheckACK();data=ReadByte();//读 I2C_STOP();return data;
}
void I2C_START(void)
{
/* SCL=0; SDA=0; //Set SCL=0, SDA=0SCLC=0;SDAC=0; //SCL/SDA as Output Mode_delay(10);SCL=1; SDA=1; _delay(10); //SCL=1, SDA=1, Delay 10usSDA=0; _delay(10); //SDA=0, Delay 10us SCL=0; _delay(10); //SCL=0, Delay 10us
*/ SCLC=0;SDAC=0;SCL=0;SDA=0;_delay(10);SCL=1;SDA=1;_delay(10);SDA=0;_delay(10);SCL=0;_delay(10);
}
void I2C_STOP(void)
{
/* SCL=0; SDA=0; //Set SCL=0, SDA=0SDAC=0; //SDA as Output Mode_delay(10);SCL=1; _delay(10); //SCL=1, Delay 10usSDA=0; _delay(10); //SDA=0, Delay 10usSDA=1; _delay(10); //SDA=1, Delay 10us SCL=0; _delay(10); //SCL=0, Delay 10us
*/ SCLC=0;SDAC=0;SCL=0;SDA=0;_delay(10);SCL=1;_delay(10);SDA=1;_delay(10);SCL=0;_delay(10);
}
void WriteByte(unsigned short I2CData)
{ unsigned short temp=0b10000000;SCLC=0;SCL=0; SDAC=0; //SCL=0, SDAC as Outputdo{ SDA=I2CData & temp; _delay(10); //Set SDA State and delay 10usSCL=1; _delay(10);//_delay(10); SCL=0; _delay(10); //Generate SCL Clocktemp>>=1; //Next Bit} while (temp!=0);
}
unsigned char ReadByte(void)
{ unsigned char I2CData=0, temp=0b10000000;SDAC=1; //Config SDAC as InputSCLC=0;SCL=0;do{ SCL=1; _delay(10); //Set SCL=1, Delay 10usif(SDA) I2CData|=temp; //Received DataSCL=0; _delay(10); //Set SCL=0, Delay 10ustemp>>=1; //Next Bit} while (temp!=0);SDA=1; SDAC=0; _delay(10); //Send NoACK SignalSCL=1; _delay(10); SCL=0;return I2CData;
}
void CheckACK(void)
{ unsigned short i=200;SDAC=0;SDA=1;// 先由主机把数据线拉高释放总线 再去检测数据线的电平高低SDAC=1; //Config SDAC as InputSCL=1; //_delay(10); //Set SCL=1, Delay 10uswhile(i--){//Test_Pc4C=0; //如果从机应答的话把这个引脚电平拉高//Test_Pc4=1; if(!SDA) {//DeviceFlag=1; Test_Pc4C=0; //如果从机应答的话把这个引脚电平拉高Test_Pc4=1; //_tmpc0=0;//取消PC5引脚的复用功能//Test_Pc5C=0; //如果从机应答的话把这个引脚电平拉高//Test_Pc5=1;break;}//Break if Device Respounding_delay(100);//200*100uS=2ms Waiting Time} SCL=0; _delay(10); //Set SCL=0, Delay 10us
}
void PAUSEIIC(unsigned short i)
{ unsigned short j;for (j=0;j<i;j++) _delay(10000); //Delay i*10mS
})
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