main.c

来自「飞思卡尔的SPI程序 给初学者看的 学习交流」· C语言 代码 · 共 29 行

#include <hidef.h>      /* common defines and macros */
#include <mc9s12dg128.h>     /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12dg128b"



  void main(void) {
  /* put your own code here */
  DDRA=0xff;
  PORTA=0xf0;
 
  SPI0BR=0x04;
  SPI0CR1=0x18;
  SPI0CR2=0x08;
  SPI0DR=0x00;
  SPI0SR=0x00;
  SPI0CR1=0x58;

  for(;;) {SPI0DR=0x01;while((SPI0SR&(1<<5))==0);Delay();} /* wait forever */
  /* please make sure that you never leave this function */
}

Delay(){
long i;
for(i=0;i<1000000;i++);
 
}