main.c

来自「包括DSP实验测试程序、实验示例、应用程序以及经典的DSP的C程序和汇编程序库」· C语言 代码 · 共 42 行

#include "cpu_reg.h"

void	Delay_MS(unsigned	int   ms);

void main()
{

     asm("  STM #0000h,CLKMD ");  
     while(*CLKMD & 0x01 );
     asm("  STM #40C7h,CLKMD ");  //设置CPU运行频率＝100M
/*  40C7h:5*clkin  =100M
    30c7h:4*clkin  =80M
    20c7h:3*clkin  =60M
    10C7h:2*clkin  =40M
*/
     asm("  stm   #4240h, SWWSR ");
     //2 wait except for on-chip program 1
     asm("  stm   #00a0h, PMST  "); //MP/MC = 0, IPTR = 001,ovly=0  
     asm("  stm   #0802h, BSCR  "); 
     asm("  STM #0h,IMR ");
     
     while(1)
     {
       Delay_MS(500);
       asm("  RSBX  XF ");       
       Delay_MS(500);;
       asm("  SSBX  XF ");       
     }

}
	  
void  Delay_MS(unsigned	int   ms)
{
	  unsigned	int	i,j;
	  for(i=0;i<ms;i++)
      {
      	for(j=0;j<10000;j++) {  ; }
      }
}