請問i2c和icd2是不是沒有辦法同時使用
我是使用pic18f452來做的
一開始可以傳送和接收
但傳送兩個以上slave時會有錯誤
所以改用icd2抓bug
但換上icd2後卻完全沒辦法使用了
以下是課本的程式
==========================
master
==========================
#include <p18cxxx.h>
#include <delays.h>

#define I2C_Write 0x00
#define I2C_Read 0x01
#define I2C_Device1 0x20

void F_Initial(void);
void F_I2C_START(void);
unsigned char F_I2C_WAIT(void);
unsigned char F_I2C_Send_Address(unsigned char,unsigned char);
void F_I2C_Send_Data(unsigned char);
void F_I2C_STOP(void);
unsigned char F_I2C_Read_Data(void);

void main(void)
{
unsigned char UC_I2C_CMD=I2C_Write,UC_I2C_Data=0;
F_Initial();
while(1)
{
switch (UC_I2C_CMD)
{
case I2C_Write:
F_I2C_START();
if (F_I2C_Send_Address(I2C_Device1,UC_I2C_CMD))
F_I2C_Send_Data(UC_I2C_Data++);
F_I2C_STOP();
Delay10KTCYx(20);
UC_I2C_CMD=I2C_Read;
break;
case I2C_Read:
F_I2C_START();
if (F_I2C_Send_Address(I2C_Device1,UC_I2C_CMD))
LATD = F_I2C_Read_Data();
F_I2C_STOP();
Delay10KTCYx(20);
UC_I2C_CMD=I2C_Write;
break;
default:
break;
}
}
}

void F_Initial(void)
{
TRISD = 0;
LATD = 0;
TRISCbits.TRISC3 = 0;
TRISCbits.TRISC4 = 0;
SSPSTATbits.SMP = 1;
SSPSTATbits.CKE = 0;
SSPCON1 = 0x38;
SSPADD = 0x30;
}

void F_I2C_START(void)
{
SSPCON2bits.SEN = 1;
while(!F_I2C_WAIT());
}

unsigned char F_I2C_WAIT(void)
{
if ( PIR1bits.SSPIF )
{
PIR1bits.SSPIF = 0;
return (1);
}
else
return (0);
}

unsigned char F_I2C_Send_Address(unsigned char UC_Address,unsigned char UC_RW)
{
SSPBUF = ((UC_Address & 0xFE) | UC_RW);
while(!F_I2C_WAIT());
if ( SSPCON2bits.ACKSTAT )
return (0);
else
return (1);
}

void F_I2C_Send_Data(unsigned char UC_Data)
{
SSPBUF = UC_Data;
while(!F_I2C_WAIT());
}

void F_I2C_STOP(void)
{
SSPCON2bits.PEN = 1;
while(!F_I2C_WAIT());
}

unsigned char F_I2C_Read_Data(void)
{
unsigned char UC_Temp=0;
SSPCON2bits.RCEN = 1;
while(!F_I2C_WAIT());
UC_Temp = SSPBUF;
SSPCON2bits.ACKDT = 1;
SSPCON2bits.ACKEN = 1;
while(!F_I2C_WAIT());
return ( UC_Temp );
}
==========================
slave
==========================
#include <p18cxxx.h>
#include <portb.h>
#include <i2c.h>

#define I2C_Address 0x20

unsigned char I2C_Data=0x01;

void F_Initial ( void );
void F_Enable_High_Interrupts ( void );
void F_Check_I2C_CMD(void);

void High_INT_SER ( void );

#pragma code High_Interrupt_Vector=0x08
void High_INT_VEC (void)
{
_asm
goto High_INT_SER
_endasm
}
#pragma code

#pragma interrupt High_INT_SER
void High_INT_SER (void)
{
if ( PIR1bits.SSPIF == 1 )
{
PIR1bits.SSPIF = 0;
F_Check_I2C_CMD();
}
}

void main (void)
{
F_Initial();
while(1);
}

void F_Initial ()
{
TRISD = 0;
LATD = 0;
TRISCbits.TRISC3 = 0;
TRISCbits.TRISC4 = 0;
SSPADD = I2C_Address;
SSPSTATbits.SMP = 1;
SSPSTATbits.CKE = 0;
SSPCON1 = 0x36;
PIE1bits.SSPIE = 1;
IPR1bits.SSPIP = 1;
F_Enable_High_Interrupts();
}

void F_Enable_High_Interrupts (void)
{
RCONbits.IPEN = 1;
INTCONbits.GIEH = 1;
}

void F_Check_I2C_CMD(void)
{
unsigned char UC_I2C_CMD,UC_Temp;
UC_I2C_CMD = (0x2D & SSPSTAT);
switch (UC_I2C_CMD)
{
case 0x09:
UC_Temp = ReadI2C();
break;
case 0x29:
LATD = ReadI2C();
break;
case 0x0C:
SSPCON1bits.CKP = 0;
SSPBUF = I2C_Data;
SSPCON1bits.CKP = 1;
I2C_Data <<= 1;
if ( I2C_Data == 0)
I2C_Data=0x01;
break;
default:
break;
}
}

謝謝大家的回答

恩恩
我了解了
謝謝囉^^

最近買了picdem z的rf卡
但卻一直找不到有關此rf卡的資料
小弟的英文又不太好
不知有沒有人知道有關此rf卡的資料
這此先謝了