//----------------------------------------------------------------------------
// C main line
//----------------------------------------------------------------------------
#include <m8c.h> // part specific constants and macros
#include "PSoCAPI.h" // PSoC API definitions for all User Modules
#define uchar unsigned char
#define clearbit( MSKN_REG, MASK ) (MSKN_REG &= ~MASK) // Clear Bit Mask(s)
#define setbit( MSKN_REG, MASK ) (MSKN_REG |= MASK) // Set Bit Mask(s)
#define AddRd 0x81 //Read Address
#define sda 0x20
#define scl 0x80
unsigned char Reg_dat[2]={0,0};
unsigned char E2P_dat[2]={0,0};
unsigned char txbuf[2]={0,0};
BYTE F_ACK=0;
/**/
void uDelay()
{;;;}
void mDelay(unsigned int j)//A normal delay
{
unsigned int i;
for(;j>0;j--)
{
for(i=0;i<63;i++)
{;}
}
}
void Start(void)
{
setbit(PRT1DR,sda); //置Sda为高
setbit(PRT1DR,scl); //置scl为高
uDelay();uDelay();
clearbit(PRT1DR,sda); //sda为低
uDelay();
clearbit(PRT1DR,scl);
}
//stop IIC
void Stop(void)
{
clearbit(PRT1DR,sda); //sda为低
uDelay();
setbit(PRT1DR,scl); //置scl为高
uDelay();uDelay();
setbit(PRT1DR,sda); //sda为高
uDelay();uDelay();
clearbit(PRT1DR,scl);
uDelay();
setbit(PRT1DR,scl);
}
/* void reposion()
{
unsigned int i;
clearbit(PRT1DR,scl);
uDelay();
setbit(PRT1DR,sda); //准备接收应答
uDelay();
setbit(PRT1DR,scl);
uDelay();uDelay();
if(((PRT1DR&sda))&&i<2500){i++; F_ACK=0;} //判断I2C设备有应答则置ACK为1;
else F_ACK=1;
clearbit(PRT1DR,scl);
uDelay();
}*/
//ack IIC
void Ack(void)
{
clearbit(PRT1DR,sda); //sda为低
uDelay();
setbit(PRT1DR,scl); //置scl为高
uDelay();uDelay();
clearbit(PRT1DR,scl); //scl为低
uDelay();
}
//unack IIC
void NoAck(void)
{
setbit(PRT1DR,sda); //sda为高
uDelay();
setbit(PRT1DR,scl); //置scl为高
uDelay();uDelay();
clearbit(PRT1DR,scl); //scl为低
uDelay();
}
void i2c_init()
{
setbit(PRT1DR,sda);
uDelay();uDelay();
setbit(PRT1DR,scl);
uDelay();uDelay();
}
/**/
void Send(unsigned char Data,unsigned char n)
{
unsigned int i;
unsigned char BitCounter;
unsigned char temp;
BitCounter=n;
do
{
temp=Data;
clearbit(PRT1DR,scl);
uDelay();uDelay();
if((temp&0x80)==0x80) setbit(PRT1DR,sda);
else clearbit(PRT1DR,sda);
setbit(PRT1DR,scl); //保持数据
temp=Data<<1;
Data=temp;
BitCounter--;
}
while(BitCounter);
uDelay();
clearbit(PRT1DR,scl);
uDelay();
setbit(PRT1DR,sda); //准备接收应答
uDelay();
setbit(PRT1DR,scl);
uDelay();uDelay();
if((PRT1DR&sda)&&(i<250)){i++; F_ACK=0;} //判断I2C设备有应答则置ACK为1;
else F_ACK=1;
clearbit(PRT1DR,scl);
uDelay();
setbit(PRT1DR,sda);
uDelay();
}
unsigned char Read(void)
{
unsigned char temp=0;
unsigned char temp1=0;
unsigned char BitCounter=8;
setbit(PRT1DR,sda);
do
{
clearbit(PRT1DR,scl);
uDelay();uDelay();
setbit(PRT1DR,scl); //准备接收数据
uDelay();uDelay();
if(PRT1DR&sda) temp=temp|0x01; //接收1
else temp=temp&0xfe; //接收0
if(BitCounter-1)
{
temp1=temp<<1;
temp=temp1;
}
BitCounter--;
}
while(BitCounter);
return(temp);
}
/**/
void Sensor_reset() //器件重置
{
Start();
Send(0x40,8);
Send(0xfe,8);
uDelay();
clearbit(PRT1DR,scl);
}
/**/
BYTE WrToSensor(unsigned char AddWr,unsigned char com)
{
unsigned char i;
// unsigned char *PData;
Start();
Send(AddWr,8); //Write Address
Send(com,8); //Write Data
Stop();
mDelay(20);
if(F_ACK) return 1;
else return 0;
}
/**/
int RdFromSensor()
{
int temp;
int temp1,temp2;//,*PData;
Start();
Send(0x40,8); //写器件地址
uDelay();
Send(0xf1,8); //写入命令
uDelay();
Start();
Send(0x41,8); //发送命读写命令
mDelay(80);
temp1=Read(); // Read two Data
Ack();
// uDelay();
temp2=Read();
mDelay(5);
clearbit(PRT1DR,scl); //钳住总线
NoAck();
Stop();
temp=(temp1<<8)|(temp2&0x00ff);
//temp=temp1+temp2;
return temp;
// }
}
/**/
/*BYTE ReadRegistor(unsigned char Reg_dat[])
{
unsigned char i;
unsigned char *PData;
PData=Reg_dat;
for(i=0;i<2;i++)
{
Start();
Send(0x80,8);//Ack();
Send(0xE3,8);//Ack();
mDelay(5);
Start();
Send(0x81,8);
*(PData+i)=Read();
clearbit(PRT1DR,scl);
NoAck();
Stop();
if(F_ACK) return 1;
else return 0;
}
}*/
/**/
/* int ReadE2prom(unsigned char addr,unsigned char add)
{
int temp;
int temp1,temp2;
unsigned char i;
//unsigned char *PData;
//PData=E2P_dat;
// for(i=0;i<2;i++)
// {
Start();
Send(0x40,8);
uDelay();
Send(0xfa,8);
uDelay();
Send(addr,8);
Send(add,8);
mDelay(10);
Start();
Send(0x41,8);
temp1=Read(); Ack();
temp1=Read();
mDelay(5);
clearbit(PRT1DR,scl);
NoAck();
Stop();
temp=temp1+temp1;
return temp;
// }
}*/
void main()
{
BYTE f_ack,r_ack,E_ack;
uchar temp,E_dat,E_temp,rx_dat;//,tx_temp;
unsigned int Result=0,tx_temp;
DAC8_1_Start(DAC8_1_FULLPOWER);
DAC8_1_WriteStall(254);
i2c_init();
Sensor_reset();
mDelay(500);
DAC8_1_WriteStall(0);
mDelay(100);
while(1)
{
F_ACK=0;
DAC8_1_WriteStall(0);
//WrToSensor(0x40,0xf1);
//Stop();
mDelay(50);
Result=RdFromSensor();
//if(F_ACK) ;DAC8_1_WriteStall(254);
if((Result-tx_temp)!=0)
DAC8_1_WriteStall(Result);
//else DAC8_1_WriteStall(254);
tx_temp=Result;
mDelay(5);
}
}
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