isys.h

在基于avr内核的单片机上实现MP3播放器的功能

#define    osc_clk		    11		  //uint   MHz
#define   sys_tick          5	     //unit	   ms================confige
#define   UCPU_F  11059200


#define  MHz(osc_clk)	     osc_clk *1000000
#define  sys_osc_clk 		 MHz(osc_clk)
#define  ms(time_long)		((time_long*sys_osc_clk)/1000)

//=======================================
#define on     1
#define off    0 
#define error 1
#define ok    0
#define active 1
#define negtive 0

#define onled  clr
#define offled set
//#define sys_idle	   PCON|=0x01
//#define sys_idle_out PCON&=0xfe
//==============================================

//typedef unsigned char uint8;
//typedef unsigned int uint16;
//typedef unsigned long uint32;
typedef unsigned char INT8U; 
typedef unsigned short INT16U; 
typedef unsigned int INT32U; 

//==================
#define  uchar  unsigned char
#define uint8  unsigned char
#define  int8    signed char
#define uint unsigned int
#define uint16 unsigned int
#define  int16   signed int
#define uint32 unsigned long
#define  int32   signed long
//=================================
#define	     loop_clockwise(cnt,modulo)           cnt++;if(cnt>=modulo) cnt=0;
#define	 	 loop_counterclockwise(cnt,modulo)	  if(0==cnt)  cnt=modulo; cnt--;
//============================================
void delay(unsigned char z)  // 精确计时，z*2
{ 
while(--z);
}

void delay_mult(uint16 z)   //大时间计时  z*821
{ 
unsigned char j;
while(z--)
for(j=0;j<=200;j++) ;
}