求助SPI例程

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本人初学飞思卡尔，特求助有关SPI例程，望得到帮助！谢了

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https://www.nxpic.org.cn/bbs/article_265_113570.html

matt_hfut

#pragma LINK_INFO DERIVATIVE "mc9s12dg128b"
/************ @ INI_SCI ********************/
void ini_sci(void) {
SCI0BD=52;
SCI0CR1=0x00;
SCI0CR2=0x0c;
}
/************ @@ TX_SCI ******************/
void tx_sci(char i){
while(SCI0SR1_TC!=1);
SCI0DRL=i;
}
/************* @@@ INI_SPI *********************/
void ini_spi(void){
SPI0BR=0b01110111; //clock divisor is 2
SPI0CR2=0b00000010;// SS is not used(in master mode ,MODFEN=0)
SPI0CR1=0b01010000;// as master
}
/*************** @@@@ SPI_WRITE *****************/
void putchar_spi0 (char cx)
{ unsigned char temp;
while(!(SPI0SR_SPTEF)); /* wait until write is permissible */
SPI0DR = cx; /* output the byte to the SPI */
while(!(SPI0SR_SPIF)); /* wait until write operation is complete */
// temp=SPI0SR;
temp=SPI0DR; // clear the spif flag.
}
/************** @@@@@ SPI_READ *******************/
char getchar_spi0(void)
{
unsigned char te;
while(!(SPI0SR_SPTEF)); /* wait until write is permissible */
SPI0DR = 0x61; /* trigger 8 SCK pulses to shift in data */
while(!(SPI0SR_SPIF)); /* wait until a byte has been shifted in */
// te=SPI0SR;
te=SPI0DR; // clear the spif flag.
return te; /* return the character */
}
/**************** @@@@@@DELAY ********************/
void delay (unsigned char i){
word temp;
for(;i>0;i--){
for(temp=0;temp