查看“使用AT24Cxx扩展C8051F EEPROM”的源代码


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　　 使用AT24Cxx扩展C8051F EEPROM。


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[[File:C8051F_3_5.jpg]]
使用AT24Cxx扩展C8051F EEPROM电路原理图


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下面部分从TXT拷出，拷到网页，代码部分缺省了很多空格，比较凌乱，请谅解！
I2C(SMBus)详细程序请查看<a class="Blue_2_12px_" href="https://{{SERVERNAME}}/article/C8051F-4-3-4.htm" style="color: rgb(7, 66, 184);" target="_blank">C8051F I2C(SMBus)程序
。 

//目标系统: 基于C8051F单片机
//应用软件: Silicon IDE / Keil

/*01010101010101010101010101010101010101010101010101010101010101010101
----------------------------------------------------------------------
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
----------------------------------------------------------------------
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
----------------------------------------------------------------------
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
----------------------------------------------------------------------
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 &amp;= ~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);
}
void Read_AT24Cxx(uint adr,uchar *RdData)
{
SMBus_Write(0xA0,adr,0,1);
SMBus_Read(0xA1,RdData,1);
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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。
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