/////SPI調(diào)試程序//////////
/////SPI_slave.c//////////////
#include <C8051F040.h>	
typedef unsigned char uchar;
typedef unsigned int uint;
xdata uchar aa[6]={0x31,0x32,0x33,0x34,0x35,0x36};
xdata uchar rr[6];
xdata uchar k;
xdata uchar t;
enum {aalen=6};
void delay1ms(uint time){//延遲1ms
	uint i;
	uint j;
	for (i=0;i<time;i++){
		for(j=0;j<300;j++);
	}
}
void spi_cfg(uchar spicfg,uchar spickr,uchar spicn){//SPI配置函數(shù)
	 SFRPAGE = 0x00;	
	 SPI0CFG = spicfg;	
	 SPI0CKR = spickr;	
     SPI0CN = spicn;	   
     SFRPAGE = 0x0F;
	 EIE1|= 0x01;
}
void config (void) {
    WDTCN = 0x07;	//看門狗禁止
    WDTCN = 0xDE;   
    WDTCN = 0xAD;
    SFRPAGE = 0x0F;
    XBR0 = 0x02;	
	XBR1 = 0x00;	
	XBR2 = 0x40;	
    XBR3 = 0x00;   
    P0MDOUT = 0x0c; 
	/*交叉開關(guān)配置,SPI總線SCK配置到P0.0口，為開漏輸出；MISO為P0.1口，開漏輸出；MOSI為P0.2口，推挽輸出，NSS為P0.3口*/
    SFRPAGE = 0x0F;
    CLKSEL = 0x00;  
    OSCXCN = 0x00;	
    OSCICN = 0x84;	
    //采用內(nèi)部晶振，為24.5MHZ8分頻
}   //End of config
void main(){
	config();
	spi_cfg(0x10,0x2d,0x05);
	/*
	SPI0CFG = 0x10;	// SCK高電平空閑，從機(jī)模式，其他設(shè)置與主機(jī)相同
	SPI0CKR = 0x2D;	// 從機(jī)的SCK時(shí)鐘對(duì)SPI總線無影響
    SPI0CN = 0x05;		// 4線制從機(jī)模式，SPIEN為1
	*/
	EA=1;
	k=0;
	while(1){
		SFRPAGE=0x00;
		if(SPIEN==0)
			k=0;//可在此設(shè)斷點(diǎn)觀察接收數(shù)組與主機(jī)發(fā)送數(shù)組是否一致
	}	
}
void spi_ISR() interrupt 6{
	SFRPAGE=0x00;//此代碼可省略，SFRPAGE能自動(dòng)跳轉(zhuǎn)到中斷標(biāo)志位所在頁
	rr[k]=SPI0DAT;
//程序中尚未考慮接收溢出等情況，對(duì)于雙機(jī)通訊暫無影響
	SPI0DAT=aa[k];
//全雙工通訊，所以接收的同時(shí)，可將發(fā)送的數(shù)據(jù)寫入發(fā)送緩沖區(qū)
//在下一次接收過程中將發(fā)送緩沖區(qū)的數(shù)據(jù)發(fā)送出去。
	k++;
	if(k>=6)
		SPIEN=0;//接收7個(gè)數(shù)據(jù)
	SPIF=0;
}