125 lines
4.6 KiB
C
125 lines
4.6 KiB
C
/* This file has been prepared for Doxygen automatic documentation generation.*/
|
|
/*! \file *********************************************************************
|
|
*
|
|
* \brief
|
|
* This file contains the low level macros and definition for the USB PLL.
|
|
*
|
|
* \par Application note:
|
|
* AVR280: USB Host CDC Demonstration
|
|
*
|
|
* \par Documentation
|
|
* For comprehensive code documentation, supported compilers, compiler
|
|
* settings and supported devices see readme.html
|
|
*
|
|
* \author
|
|
* Atmel Corporation: http://www.atmel.com \n
|
|
* Support email: avr@atmel.com
|
|
*
|
|
* $Name: $
|
|
* $Revision: 1.1 $
|
|
* $RCSfile: pll_drv.h,v $
|
|
* $Date: 2008/10/14 20:16:36 $ \n
|
|
* $Id: pll_drv.h,v 1.1 2008/10/14 20:16:36 c_oflynn Exp $
|
|
******************************************************************************/
|
|
/* Copyright (c) 2008 ATMEL Corporation
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the
|
|
distribution.
|
|
* Neither the name of the copyright holders nor the names of
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef PLL_DRV_H
|
|
#define PLL_DRV_H
|
|
|
|
//_____ I N C L U D E S ____________________________________________________
|
|
|
|
/**
|
|
@addtogroup usb
|
|
@{
|
|
*/
|
|
//_____ M A C R O S ________________________________________________________
|
|
|
|
//! @defgroup PLL_macros PLL Macros
|
|
//! These functions allow to control the PLL
|
|
//! @{
|
|
#define PLLx24 ( (0<<PLLP2) | (0<<PLLP1) | (0<<PLLP0) )
|
|
#define PLLx12 ( (0<<PLLP2) | (0<<PLLP1) | (1<<PLLP0) )
|
|
#define PLLx08 ( (0<<PLLP2) | (1<<PLLP1) | (0<<PLLP0) )
|
|
#define PLLx06 ( (0<<PLLP2) | (1<<PLLP1) | (1<<PLLP0) )
|
|
#define PLLx04 ( (1<<PLLP2) | (0<<PLLP1) | (0<<PLLP0) )
|
|
#define PLLx03 ( (1<<PLLP2) | (0<<PLLP1) | (1<<PLLP0) )
|
|
#define PLLx04_8 ( (1<<PLLP2) | (1<<PLLP1) | (0<<PLLP0) )
|
|
#define PLLx02 ( (1<<PLLP2) | (1<<PLLP1) | (1<<PLLP0) )
|
|
|
|
|
|
//! @brief Start the PLL at only 48 MHz, regarding CPU frequency
|
|
//! Start the USB PLL with clockfactor
|
|
//! clockfactor can be PLLx24, PLLx12, PLLx08
|
|
//! PLLx06, PLLx04, PLLx03
|
|
#define Start_pll(clockfactor) \
|
|
(PLLCSR = ( clockfactor | (1<<PLLE) ))
|
|
|
|
//! return 1 when PLL locked
|
|
#define Is_pll_ready() (PLLCSR & (1<<PLOCK) )
|
|
|
|
//! Test PLL lock bit and wait until lock is set
|
|
#define Wait_pll_ready() while (!(PLLCSR & (1<<PLOCK)))
|
|
|
|
//! Stop the PLL
|
|
#define Stop_pll() (PLLCSR &= (~(1<<PLLE)) )
|
|
|
|
// Start the PLL in autofactor mode
|
|
// regarding FOSC define
|
|
#if (FOSC==2000)
|
|
//! Start the PLL in autofactor mode
|
|
//! regarding FOSC define
|
|
#define Pll_start_auto() Start_pll(PLLx24)
|
|
#elif (FOSC==4000)
|
|
#define Pll_start_auto() Start_pll(PLLx12)
|
|
#elif (FOSC==6000)
|
|
#define Pll_start_auto() Start_pll(PLLx08)
|
|
#elif (FOSC==8000)
|
|
//! Start the PLL in autofactor mode
|
|
//! regarding FOSC define
|
|
#define Pll_start_auto() Start_pll(PLLx06)
|
|
#elif (FOSC==12000)
|
|
#define Pll_start_auto() Start_pll(PLLx04)
|
|
#elif (FOSC==16000)
|
|
#define Pll_start_auto() Start_pll(PLLx03)
|
|
#elif (FOSC==20000)
|
|
#define Pll_start_auto() Start_pll(PLLx04_8)
|
|
#elif (FOSC==24000)
|
|
#define Pll_start_auto() Start_pll(PLLx02)
|
|
#else
|
|
#error "FOSC should be defined in config.h"
|
|
#endif
|
|
|
|
//! @}
|
|
|
|
//! @}
|
|
#endif // PLL_DRV_H
|
|
|
|
|