使用AT24Cxx扩展C8051F EEPROM电路原理图

/*01010101010101010101010101010101010101010101010101010101010101010101
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实验内容：
写入一些测试数据进EEPROM，再读出，使用P2口与LED相连，观测是否与写入一致
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硬件连接：
将P2口与8位LED指示灯相连。
DVK501(AT24CxxPrlPort)    F320 EX
                           VCC    ---------   VCC
                           GND   ---------   GND
                           SDA    ---------   P1.0  
                           SCL    ---------   P1.1
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注意事项：
（1）若有加载库程序，请将光盘根目录下的“library”下的“C8051F”文件夹拷到D盘
（2）请详细阅读：光盘根目录下的“说明书首页.htm”里的相应产品说明
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10101010101010101010101010101010101010101010101010101010101010101010*/

#define _DVK501_F320_EX_

#include <c8051f320.h>
#include <../../../../library/C8051F/ws_clock.h>
#include <../../../../library/C8051F/ws_delay.h>
#include <../../../../library/C8051F/ws_iic_port.h>
#include <../../../../library/C8051F/ws_at24cxx.h>

void main(void)
{
uchar *pRdDat;

PCA0MD &= ~0x40; // Clear watchdog timer enable
clock_external(); // Set oscillator in external,the clock is 12M
delay_ms(100);
Check_SDA();
XBR1 = 0x40; // Enable crossbar and weak pull-ups
SMBus_Init();
Enb_Interrupt();

Write_AT24Cxx(0x00,'P');
Read_AT24Cxx(0x00,pRdDat);
P2 = *pRdDat;

while(1);
}

void Write_AT24Cxx(uchar adr,uchar WrData)
{
SMBus_Write(0xA0,adr,WrData,2);
}

观察读出的EEPROM数据与写入EERPOM的数据是否一致，用LED作为显示。