http://www.microchip.com.tw/modules/mydownloads/viewcat.php?cid=4
dsPIC30F Module TRaining - SPI 講義及練習 下載看一下，李免有何先生寫好的 Code Examples for SPI Master & Slave mode emulater for the 25LCxxx EEPROM.

各路高手：
我想要做一個pic24與eeprom的存取程式，下面是透過spi讓pic24與eeprom上的STATUS register存取測試，但我老是沒有辦法成功，請各位幫我看一下

還有，我用的是Explorer 16 100-pin的開發版
Explorer 16 100 pin board guide- http://ww1.microchip.com/downloads/cn/DeviceDoc/cn025219.pdf
25LC256的eeprom-
http://ww1.microchip.com/downloads/cn/DeviceDoc/cn011841.pdf


#include <p24FXXXX.h>
void SPI_Initial(void) ;
void SPI2Write(unsigned char data);
unsigned char SPI2Read(void);

unsigned char data;
int aa1;
int main(void)
{
SPI_Initial();

TRISDbits.TRISD12=0; //eeprom cs
PORTDbits.RD12=1;

PORTDbits.RD12=0; //Set the write enable latch
SPI2Write(0b00000110);
PORTDbits.RD12=1;

PORTDbits.RD12=0; //Write STATUS register
SPI2Write(0b00000001);
SPI2Write(0b10001100);
PORTDbits.RD12=1;

PORTDbits.RD12=0; //Read STATUS register
SPI2Write(0b00000101);
aa1=SPI2Read(); //receive data
PORTDbits.RD12=1;
Nop();
} //main迴圈

//===========SPI Initial================
void SPI_Initial(void)
{
SPI2STAT=0b0000000000000000;
SPI2CON1=0b0000000000111111;
SPI2CON2=0b0000000000000000;
IPC8bits.SPI2IP2=1;
IPC8bits.SPI2IP1=1;
IPC8bits.SPI2IP0=1;
IEC2bits.SPI2IE=0;
IEC2bits.SPF2IE=0;
SPI2STATbits.SPIEN=1;
}
//==============SPI2write====================
void SPI2Write(unsigned char data)
{
SPI2BUF = data;
while(SPI2STATbits.SPITBF);
}
//==============SPI2read=====================
unsigned char SPI2Read()
{
//unsigned char data;
while(!SPI2STATbits.SPIRBF);
data = SPI2BUF;
return data;
}