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/**
* \file
*
* \brief Chip-specific oscillator management functions.
*
* Copyright (c) 2011-2015 Atmel Corporation. All rights reserved.
*
* \asf_license_start
*
* \page License
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. The name of Atmel may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 4. This software may only be redistributed and used in connection with an
* Atmel microcontroller product.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
*
* \asf_license_stop
*
*/
/*
* Support and FAQ: visit <a href="https://www.atmel.com/design-support/">Atmel Support</a>
*/
#ifndef CHIP_OSC_H_INCLUDED
#define CHIP_OSC_H_INCLUDED
#include "compiler.h"
/// @cond 0
/**INDENT-OFF**/
#ifdef __cplusplus
extern "C" {
#endif
/**INDENT-ON**/
/// @endcond
/*
* Below BOARD_XXX macros are related to the specific board, and
* should be defined by the board code, otherwise default value are used.
*/
#ifndef BOARD_FREQ_SLCK_XTAL
# warning The board slow clock xtal frequency has not been defined.
# define BOARD_FREQ_SLCK_XTAL (32768UL)
#endif
#ifndef BOARD_FREQ_SLCK_BYPASS
# warning The board slow clock bypass frequency has not been defined.
# define BOARD_FREQ_SLCK_BYPASS (32768UL)
#endif
#ifndef BOARD_FREQ_MAINCK_XTAL
# warning The board main clock xtal frequency has not been defined.
# define BOARD_FREQ_MAINCK_XTAL (12000000UL)
#endif
#ifndef BOARD_FREQ_MAINCK_BYPASS
# warning The board main clock bypass frequency has not been defined.
# define BOARD_FREQ_MAINCK_BYPASS (12000000UL)
#endif
#ifndef BOARD_OSC_STARTUP_US
# warning The board main clock xtal startup time has not been defined.
# define BOARD_OSC_STARTUP_US (15625UL)
#endif
/**
* \weakgroup osc_group
* @{
*/
//! \name Oscillator identifiers
//@{
#define OSC_SLCK_32K_RC 0 //!< Internal 32kHz RC oscillator.
#define OSC_SLCK_32K_XTAL 1 //!< External 32kHz crystal oscillator.
#define OSC_SLCK_32K_BYPASS 2 //!< External 32kHz bypass oscillator.
#define OSC_MAINCK_4M_RC 3 //!< Internal 4MHz RC oscillator.
#define OSC_MAINCK_8M_RC 4 //!< Internal 8MHz RC oscillator.
#define OSC_MAINCK_12M_RC 5 //!< Internal 12MHz RC oscillator.
#define OSC_MAINCK_XTAL 6 //!< External crystal oscillator.
#define OSC_MAINCK_BYPASS 7 //!< External bypass oscillator.
//@}
//! \name Oscillator clock speed in hertz
//@{
#define OSC_SLCK_32K_RC_HZ CHIP_FREQ_SLCK_RC //!< Internal 32kHz RC oscillator.
#define OSC_SLCK_32K_XTAL_HZ BOARD_FREQ_SLCK_XTAL //!< External 32kHz crystal oscillator.
#define OSC_SLCK_32K_BYPASS_HZ BOARD_FREQ_SLCK_BYPASS //!< External 32kHz bypass oscillator.
#define OSC_MAINCK_4M_RC_HZ CHIP_FREQ_MAINCK_RC_4MHZ //!< Internal 4MHz RC oscillator.
#define OSC_MAINCK_8M_RC_HZ CHIP_FREQ_MAINCK_RC_8MHZ //!< Internal 8MHz RC oscillator.
#define OSC_MAINCK_12M_RC_HZ CHIP_FREQ_MAINCK_RC_12MHZ //!< Internal 12MHz RC oscillator.
#define OSC_MAINCK_XTAL_HZ BOARD_FREQ_MAINCK_XTAL //!< External crystal oscillator.
#define OSC_MAINCK_BYPASS_HZ BOARD_FREQ_MAINCK_BYPASS //!< External bypass oscillator.
//@}
static inline void osc_enable(uint32_t ul_id)
{
switch (ul_id) {
case OSC_SLCK_32K_RC:
break;
case OSC_SLCK_32K_XTAL:
pmc_switch_sclk_to_32kxtal(PMC_OSC_XTAL);
break;
case OSC_SLCK_32K_BYPASS:
pmc_switch_sclk_to_32kxtal(PMC_OSC_BYPASS);
break;
case OSC_MAINCK_4M_RC:
pmc_switch_mainck_to_fastrc(CKGR_MOR_MOSCRCF_4_MHz);
break;
case OSC_MAINCK_8M_RC:
pmc_switch_mainck_to_fastrc(CKGR_MOR_MOSCRCF_8_MHz);
break;
case OSC_MAINCK_12M_RC:
pmc_switch_mainck_to_fastrc(CKGR_MOR_MOSCRCF_12_MHz);
break;
case OSC_MAINCK_XTAL:
pmc_switch_mainck_to_xtal(PMC_OSC_XTAL/*,
pmc_us_to_moscxtst(BOARD_OSC_STARTUP_US,
OSC_SLCK_32K_RC_HZ)*/);
break;
case OSC_MAINCK_BYPASS:
pmc_switch_mainck_to_xtal(PMC_OSC_BYPASS/*,
pmc_us_to_moscxtst(BOARD_OSC_STARTUP_US,
OSC_SLCK_32K_RC_HZ)*/);
break;
}
}
static inline void osc_disable(uint32_t ul_id)
{
switch (ul_id) {
case OSC_SLCK_32K_RC:
case OSC_SLCK_32K_XTAL:
case OSC_SLCK_32K_BYPASS:
break;
case OSC_MAINCK_4M_RC:
case OSC_MAINCK_8M_RC:
case OSC_MAINCK_12M_RC:
pmc_osc_disable_fastrc();
break;
case OSC_MAINCK_XTAL:
pmc_osc_disable_xtal(PMC_OSC_XTAL);
break;
case OSC_MAINCK_BYPASS:
pmc_osc_disable_xtal(PMC_OSC_BYPASS);
break;
}
}
static inline bool osc_is_ready(uint32_t ul_id)
{
switch (ul_id) {
case OSC_SLCK_32K_RC:
return 1;
case OSC_SLCK_32K_XTAL:
case OSC_SLCK_32K_BYPASS:
return pmc_osc_is_ready_32kxtal();
case OSC_MAINCK_4M_RC:
case OSC_MAINCK_8M_RC:
case OSC_MAINCK_12M_RC:
case OSC_MAINCK_XTAL:
case OSC_MAINCK_BYPASS:
return pmc_osc_is_ready_mainck();
}
return 0;
}
static inline uint32_t osc_get_rate(uint32_t ul_id)
{
switch (ul_id) {
case OSC_SLCK_32K_RC:
return OSC_SLCK_32K_RC_HZ;
case OSC_SLCK_32K_XTAL:
return BOARD_FREQ_SLCK_XTAL;
case OSC_SLCK_32K_BYPASS:
return BOARD_FREQ_SLCK_BYPASS;
case OSC_MAINCK_4M_RC:
return OSC_MAINCK_4M_RC_HZ;
case OSC_MAINCK_8M_RC:
return OSC_MAINCK_8M_RC_HZ;
case OSC_MAINCK_12M_RC:
return OSC_MAINCK_12M_RC_HZ;
case OSC_MAINCK_XTAL:
return BOARD_FREQ_MAINCK_XTAL;
case OSC_MAINCK_BYPASS:
return BOARD_FREQ_MAINCK_BYPASS;
}
return 0;
}
/**
* \brief Wait until the oscillator identified by \a id is ready
*
* This function will busy-wait for the oscillator identified by \a id
* to become stable and ready to use as a clock source.
*
* \param id A number identifying the oscillator to wait for.
*/
static inline void osc_wait_ready(uint8_t id)
{
while (!osc_is_ready(id)) {
/* Do nothing */
}
}
//! @}
/// @cond 0
/**INDENT-OFF**/
#ifdef __cplusplus
}
#endif
/**INDENT-ON**/
/// @endcond
#endif /* CHIP_OSC_H_INCLUDED */
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