pll_drv.h

ATMEL公司AT89C51SND1为主控制器MP3源代码

/*H**************************************************************************
* NAME:         pll_drv.h         
*----------------------------------------------------------------------------
* Copyright (c) 2003 Atmel.
*----------------------------------------------------------------------------
* RELEASE:      snd1c-refd-nf-4_0_3      
* REVISION:     1.3     
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the PLL driver definition
*****************************************************************************/

#ifndef _PLL_DRV_H_
#define _PLL_DRV_H_

/*_____ I N C L U D E S ____________________________________________________*/


/*_____ M A C R O S ________________________________________________________*/


/*_____ D E F I N I T I O N ________________________________________________*/


/*_____ D E C L A R A T I O N ______________________________________________*/


#define Pll_reset()             (PLLCON &= MSK_PLLRES) 
#define Pll_enable()            (PLLCON |= MSK_PLLEN) 
#define Pll_stop()              (PLLCON &= ~MSK_PLLEN)
#define Pll_set_ndiv(n)         (PLLNDIV = n)
#define Pll_set_rdiv(r)         (PLLRDIV = (Byte)(r >> 2)); (PLLCON = (Byte)(r << 6))
#define Pll_get_lock()          ((PLLCON & MSK_PLOCK) == MSK_PLOCK)


#endif  /* _PLL_DRV_H_ */