osc.c

来自「矿工定位系统,包括单片机原理图,PCB,KEILC51原代码,带瓦斯检测功能,成」· C语言 代码 · 共 21 行

// SFR description needs to be included
#include<REG922.h>
#include "osc.h"

/***********************************************************************
DESC:    Initializes the oscillator to generate a CPU clock at
         7.3728 MHz

         Uses on-chip oscillator
RETURNS: Nothing
************************************************************************/
extern void osc_init(void)
{
  // clock divider
  DIVM = 0x00;
  // no clock out on CLKOUT pin
  TRIM &= ~0x40;
  // select high power clock (CPU clock faster than 8MHz)
  AUXR1 &= ~0x80;
} // osc_init