不合格!

要完整的 SCL & SDA 的波形才可以切要涵蓋 Start 到 Stop Condition，請重送。

感謝版主的回覆~

我是利用萬用燒錄器,將EEPROM中的資料讀出~
合對EEPROM中的位置,是否與寫入之值相同~
所以才得知,資料有寫進EEPROM之中~

版主,我以分析儀的圖擷取出也以上傳了~
謝謝~

如果各位大大 有相關的意見,也拜託給我一點建議~謝謝~

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有個問題先請教一下，你怎樣確定你的資料有寫到 EEPROM 中?

可以的話貼一下你所抓到的波形這樣比較容易，程式那麼長單用看的很難除錯。

各位大大~
我用了AN997還有之前版上一位前輩的範例~整合一個程式~
已經成功的將EEPROM寫入資料了~
可是目前卻是遇到讀不出資料的問題~

貼上讀取EEPROM的程式~還請各位大大幫忙~
程式中是否出錯~

==============================

/*=============================================
腳位定義: RA0 ===> SCL
RA1 ===> SDA
PORTD ===> All LED
==============================================*/
#define SW3 RA4
#define SW2 RB2
#define SCL RA0 //PORTA.RA0==>SCL
#define SDA RC0 //PORTA.RA1==>SDA
#define SDA_TRIS TRISC0 //SDA tris bit, PORTA pin 1
#include <pic18.h> //#include <pic18f4550.h>


void init(void);
void delay(void);

void I2C_start(void);
void I2C_write(void);
void I2C_read(void);
void I2C_stop(void);
void I2C_RecData(void);

unsigned char I2cRecData( void );

unsigned int ee_data;
unsigned int ee_temp;
unsigned int address;
unsigned char address_High;
unsigned char address_Low;

unsigned char temp;

/*==============================================
Main Program
==============================================*/
void main(void)
{

unsigned char temp1;
unsigned char i;
init();
while(1)
{
if(!SW3)
{

Delay_x_mS(100);
I2C_read();

}

}

}


/*==============================================
init
==============================================*/
void init(void)
{
TRISA = 0b00010000; //設定PortA
TRISD = 0b00000000; //設定PortD
TRISB = 0b00000100; //設定PortB
PORTD = 0x00; //清除PORTD

}

/*==============================================
I2C_start
==============================================*/
void I2C_start(void)
{

SDA_TRIS = 1; // Ensure SDA is high
SCL = 1; // Ensure SCL is high
SDA = 1;
SDA_TRIS = 0; // Configure SDA as an output
SDA = 0; // Pull SDA low
SCL = 0; // Pull SCL low



}

/*==============================================
I2C_data
==============================================*/

void I2C_data( unsigned char Data )
{
signed char i;
SDA_TRIS = 0;


for( i =7;i>=0;i-- )
{
SCL = 0;

temp = ( Data >> i) & 0x01;
SDA = temp;
SCL = 1;

}
SDA_TRIS = 1;

NOP();
SCL = 0;
NOP();
SCL = 1;
NOP();
SCL = 0;

SDA_TRIS = 0;
}



/*==============================================
I2C_address
==============================================*/
void I2C_address(unsigned char SlaveAddr, unsigned char Mode) // Write : Mode = 0, Read : Mode = 1
{
unsigned char Addr;
signed char i;
SDA_TRIS = 0;
SCL = 0;
Addr = SlaveAddr | Mode;
SDA = 0;
for( i=7;i>=0;i-- )
{

SCL = 0;

temp = ( Addr >> i ) & 0x01;
SDA = temp;

SCL = 1;

}

SDA_TRIS = 1;

SCL = 0;
NOP();
NOP();
SCL = 1;
NOP();
SCL = 0;
SDA_TRIS = 0;
SDA = 0;

}

/*==============================================
I2C_stop
==============================================*/
void I2C_stop(void)
{

SCL = 0; // Ensure SCL is low
SDA_TRIS = 0; // Configure SDA as an output
SDA = 0; // Ensure SDA low
SCL = 1; // Pull SCL high
SDA = 1;
SDA_TRIS = 1; // Allow SDA to be pulled high

}



/*==============================================
I2C_write
==============================================*/
void I2C_write(void)
{

signed char i;
signed char u;
i=0x20;
I2C_start();
NOP();
I2C_address(0xA0,0);
NOP();
I2C_data(0x01);
NOP();
I2C_data(0x00);
NOP();
for(u=63;u>=0;u--)
{
NOP();
I2C_data(i);
i++;

}

NOP();
NOP();

I2C_stop();



}

/*==============================================
I2C_read
==============================================*/
void I2C_read(void)
{
unsigned char temp1;

I2C_start();
NOP();
I2C_address(0xA0,0);
NOP();
I2C_data(0x00);
NOP();
I2C_data(0x02);
NOP();
I2C_start();
NOP();
I2C_address(0xA0,1);
NOP();
temp1 = I2cRecData();

NOP();
I2C_stop();

PORTD = temp1;
Delay_x_mS(2000);
}

/*==============================================
I2C_recdata
==============================================*/
unsigned char I2cRecData( void )
{

signed char i;
unsigned char temp2;
temp2 = 0x00;
SDA_TRIS = 1;
NOP();
for( i=7;i>=0;i-- )
{
SCL = 0;
NOP();NOP();
SCL = 1;
NOP();NOP();
temp2 << 1;
NOP();NOP();
if(SDA==1) temp2 |= 0x01;
NOP();NOP();
}
SDA_TRIS = 0;

SCL = 0;
SCL = 1;
SDA = 1;



SDA = 0;
SCL = 0;
return temp2;

}


==================================

目前的問題,讀不到EEPROM中資料~

用邏輯分析儀看波形,所有的波形都有出來~~

但是在最後的讀取部分,SDA大部份都是低準位,完全沒有丟出EEPROM之中的0x55~

還請各位大大幫忙~謝謝~