calc.c

来自「51单片机工程应用实例」· C语言 代码 · 共 30 行

//C语言被调用部分
//已通过
#pragma SMALL
#include <reg51.H>

unsigned int calc(unsigned long pll)
{ 
	
unsigned long  fg;
unsigned int fr;
unsigned char  fx[5];

	
	fg=pll*8192+225000;
	
	fx[0]=fg/100000000;
	fx[1]=(fg%100000000)/10000000;
	fx[2]=(fg%10000000)/1000000;
	fx[3]=(fg%1000000)/100000;
	fx[4]=(fg%100000)/10000;
	fg=fx[0]*10000+fx[1]*1000+fx[2]*100+fx[3]*10+fx[4];
	if (fx[4]>5)fg=fg+1;
	fr=fg/10;

	return fr;	 
}