beepcon.c

来自「ARM微处理器LPC2214对日本东芝的液晶控制芯片T6963的驱动程序代码」· C语言 代码 · 共 39 行

#include   "config.h"
 #include   "stdio.h"
#define    BEEPCON     0x00000080


void  DelayNS(uint32   dly)
{
  uint32  i;
  
  for(;dly>0;dly--)
  {
    for(i=0;i<50000;i++)
	i++;
   } 
}


int main(void)
{
//  unsigned char i;

  PINSEL0=0x00000000;
 
 
  IO0DIR=BEEPCON;

  
  
  while(1)
  {
    //printf("hello ,world");
    IO0SET=BEEPCON;
    DelayNS(10);
    IO0CLR=BEEPCON;   
    DelayNS(30);
  }
  
  
}