338 lines
13 KiB
C
338 lines
13 KiB
C
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2017.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.lufa-lib.org
|
|
*/
|
|
|
|
/*
|
|
Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
|
|
|
Permission to use, copy, modify, distribute, and sell this
|
|
software and its documentation for any purpose is hereby granted
|
|
without fee, provided that the above copyright notice appear in
|
|
all copies and that both that the copyright notice and this
|
|
permission notice and warranty disclaimer appear in supporting
|
|
documentation, and that the name of the author not be used in
|
|
advertising or publicity pertaining to distribution of the
|
|
software without specific, written prior permission.
|
|
|
|
The author disclaims all warranties with regard to this
|
|
software, including all implied warranties of merchantability
|
|
and fitness. In no event shall the author be liable for any
|
|
special, indirect or consequential damages or any damages
|
|
whatsoever resulting from loss of use, data or profits, whether
|
|
in an action of contract, negligence or other tortious action,
|
|
arising out of or in connection with the use or performance of
|
|
this software.
|
|
*/
|
|
|
|
/** \file
|
|
* \brief Module Clock Driver for the AVR32 UC3 microcontrollers.
|
|
*
|
|
* Clock management driver for the AVR32 UC3 microcontrollers. This driver allows for the configuration
|
|
* of the various clocks within the device to clock the various peripherals.
|
|
*/
|
|
|
|
/** \ingroup Group_PlatformDrivers_UC3
|
|
* \defgroup Group_PlatformDrivers_UC3Clocks Clock Management Driver - LUFA/Platform/UC3/ClockManagement.h
|
|
* \brief Module Clock Driver for the AVR32 UC3 microcontrollers.
|
|
*
|
|
* \section Sec_PlatformDrivers_UC3Clocks_Dependencies Module Source Dependencies
|
|
* The following files must be built with any user project that uses this module:
|
|
* - None
|
|
*
|
|
* \section Sec_PlatformDrivers_UC3Clocks_ModDescription Module Description
|
|
* Clock management driver for the AVR32 UC3 microcontrollers. This driver allows for the configuration
|
|
* of the various clocks within the device to clock the various peripherals.
|
|
*
|
|
* Usage Example:
|
|
* \code
|
|
* #include <LUFA/Platform/UC3/ClockManagement.h>
|
|
*
|
|
* void main(void)
|
|
* {
|
|
* // Start the master external oscillator which will be used as the main clock reference
|
|
* UC3CLK_StartExternalOscillator(0, EXOSC_MODE_8MHZ_OR_MORE, EXOSC_START_0CLK);
|
|
*
|
|
* // Start the PLL for the CPU clock, switch CPU to it
|
|
* UC3CLK_StartPLL(0, CLOCK_SRC_OSC0, 12000000, F_CPU);
|
|
* UC3CLK_SetCPUClockSource(CLOCK_SRC_PLL0, F_CPU);
|
|
*
|
|
* // Start the PLL for the USB Generic Clock module
|
|
* UC3CLK_StartPLL(1, CLOCK_SRC_OSC0, 12000000, 48000000);
|
|
* }
|
|
* \endcode
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _UC3_CLOCK_MANAGEMENT_H_
|
|
#define _UC3_CLOCK_MANAGEMENT_H_
|
|
|
|
/* Includes: */
|
|
#include "../../Common/Common.h"
|
|
|
|
/* Enable C linkage for C++ Compilers: */
|
|
#if defined(__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Public Interface - May be used in end-application: */
|
|
/* Macros: */
|
|
/** Enum for the possible external oscillator types. */
|
|
enum UC3_Extern_OSC_ClockTypes_t
|
|
{
|
|
EXOSC_MODE_CLOCK = AVR32_PM_OSCCTRL0_MODE_EXT_CLOCK, /**< External clock (non-crystal) mode. */
|
|
EXOSC_MODE_900KHZ_MAX = AVR32_PM_OSCCTRL0_MODE_CRYSTAL_G0, /**< External crystal oscillator equal to or slower than 900KHz. */
|
|
EXOSC_MODE_3MHZ_MAX = AVR32_PM_OSCCTRL0_MODE_CRYSTAL_G1, /**< External crystal oscillator equal to or slower than 3MHz. */
|
|
EXOSC_MODE_8MHZ_MAX = AVR32_PM_OSCCTRL0_MODE_CRYSTAL_G2, /**< External crystal oscillator equal to or slower than 8MHz. */
|
|
EXOSC_MODE_8MHZ_OR_MORE = AVR32_PM_OSCCTRL0_MODE_CRYSTAL_G3, /**< External crystal oscillator equal to or faster than 8MHz. */
|
|
};
|
|
|
|
/** Enum for the possible external oscillator startup times. */
|
|
enum UC3_Extern_OSC_ClockStartup_t
|
|
{
|
|
EXOSC_START_0CLK = AVR32_PM_OSCCTRL0_STARTUP_0_RCOSC, /**< Immediate startup, no delay. */
|
|
EXOSC_START_64CLK = AVR32_PM_OSCCTRL0_STARTUP_64_RCOSC, /**< Wait 64 clock cycles before startup for stability. */
|
|
EXOSC_START_128CLK = AVR32_PM_OSCCTRL0_STARTUP_128_RCOSC, /**< Wait 128 clock cycles before startup for stability. */
|
|
EXOSC_START_2048CLK = AVR32_PM_OSCCTRL0_STARTUP_2048_RCOSC, /**< Wait 2048 clock cycles before startup for stability. */
|
|
EXOSC_START_4096CLK = AVR32_PM_OSCCTRL0_STARTUP_4096_RCOSC, /**< Wait 4096 clock cycles before startup for stability. */
|
|
EXOSC_START_8192CLK = AVR32_PM_OSCCTRL0_STARTUP_8192_RCOSC, /**< Wait 8192 clock cycles before startup for stability. */
|
|
EXOSC_START_16384CLK = AVR32_PM_OSCCTRL0_STARTUP_16384_RCOSC, /**< Wait 16384 clock cycles before startup for stability. */
|
|
};
|
|
|
|
/** Enum for the possible module clock sources. */
|
|
enum UC3_System_ClockSource_t
|
|
{
|
|
CLOCK_SRC_SLOW_CLK = 0, /**< Clock sourced from the internal slow clock. */
|
|
CLOCK_SRC_OSC0 = 1, /**< Clock sourced from the Oscillator 0 clock. */
|
|
CLOCK_SRC_OSC1 = 2, /**< Clock sourced from the Oscillator 1 clock. */
|
|
CLOCK_SRC_PLL0 = 3, /**< Clock sourced from the PLL 0 clock. */
|
|
CLOCK_SRC_PLL1 = 4, /**< Clock sourced from the PLL 1 clock. */
|
|
};
|
|
|
|
/* Inline Functions: */
|
|
/** Starts the given external oscillator of the UC3 microcontroller, with the given options. This routine blocks until
|
|
* the oscillator is ready for use.
|
|
*
|
|
* \param[in] Channel Index of the external oscillator to start.
|
|
* \param[in] Type Type of clock attached to the given oscillator channel, a value from \ref UC3_Extern_OSC_ClockTypes_t.
|
|
* \param[in] Startup Startup time of the external oscillator, a value from \ref UC3_Extern_OSC_ClockStartup_t.
|
|
*
|
|
* \return Boolean \c true if the external oscillator was successfully started, \c false if invalid parameters specified.
|
|
*/
|
|
static inline bool UC3CLK_StartExternalOscillator(const uint8_t Channel,
|
|
const uint8_t Type,
|
|
const uint8_t Startup) ATTR_ALWAYS_INLINE;
|
|
static inline bool UC3CLK_StartExternalOscillator(const uint8_t Channel,
|
|
const uint8_t Type,
|
|
const uint8_t Startup)
|
|
{
|
|
switch (Channel)
|
|
{
|
|
case 0:
|
|
AVR32_PM.OSCCTRL0.startup = Startup;
|
|
AVR32_PM.OSCCTRL0.mode = Type;
|
|
break;
|
|
case 1:
|
|
AVR32_PM.OSCCTRL1.startup = Startup;
|
|
AVR32_PM.OSCCTRL1.mode = Type;
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
AVR32_PM.mcctrl |= (1 << (AVR32_PM_MCCTRL_OSC0EN_OFFSET + Channel));
|
|
|
|
while (!(AVR32_PM.poscsr & (1 << (AVR32_PM_POSCSR_OSC0RDY_OFFSET + Channel))));
|
|
return true;
|
|
}
|
|
|
|
/** Stops the given external oscillator of the UC3 microcontroller.
|
|
*
|
|
* \param[in] Channel Index of the external oscillator to stop.
|
|
*/
|
|
static inline void UC3CLK_StopExternalOscillator(const uint8_t Channel) ATTR_ALWAYS_INLINE;
|
|
static inline void UC3CLK_StopExternalOscillator(const uint8_t Channel)
|
|
{
|
|
AVR32_PM.mcctrl &= ~(1 << (AVR32_PM_MCCTRL_OSC0EN_OFFSET + Channel));
|
|
}
|
|
|
|
/** Starts the given PLL of the UC3 microcontroller, with the given options. This routine blocks until the PLL is ready for use.
|
|
*
|
|
* \attention The output frequency must be equal to or greater than the source frequency.
|
|
*
|
|
* \param[in] Channel Index of the PLL to start.
|
|
* \param[in] Source Clock source for the PLL, a value from \ref UC3_System_ClockSource_t.
|
|
* \param[in] SourceFreq Frequency of the PLL's clock source, in Hz.
|
|
* \param[in] Frequency Target frequency of the PLL's output.
|
|
*
|
|
* \return Boolean \c true if the PLL was successfully started, \c false if invalid parameters specified.
|
|
*/
|
|
static inline bool UC3CLK_StartPLL(const uint8_t Channel,
|
|
const uint8_t Source,
|
|
const uint32_t SourceFreq,
|
|
const uint32_t Frequency) ATTR_ALWAYS_INLINE;
|
|
static inline bool UC3CLK_StartPLL(const uint8_t Channel,
|
|
const uint8_t Source,
|
|
const uint32_t SourceFreq,
|
|
const uint32_t Frequency)
|
|
{
|
|
if (SourceFreq > Frequency)
|
|
return false;
|
|
|
|
switch (Source)
|
|
{
|
|
case CLOCK_SRC_OSC0:
|
|
AVR32_PM.PLL[Channel].pllosc = 0;
|
|
break;
|
|
case CLOCK_SRC_OSC1:
|
|
AVR32_PM.PLL[Channel].pllosc = 1;
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
AVR32_PM.PLL[Channel].pllmul = (Frequency / SourceFreq) ? (((Frequency / SourceFreq) - 1) / 2) : 0;
|
|
AVR32_PM.PLL[Channel].plldiv = 0;
|
|
AVR32_PM.PLL[Channel].pllen = true;
|
|
|
|
while (!(AVR32_PM.poscsr & (1 << (AVR32_PM_POSCSR_LOCK0_OFFSET + Channel))));
|
|
return true;
|
|
}
|
|
|
|
/** Stops the given PLL of the UC3 microcontroller.
|
|
*
|
|
* \param[in] Channel Index of the PLL to stop.
|
|
*/
|
|
static inline void UC3CLK_StopPLL(const uint8_t Channel) ATTR_ALWAYS_INLINE;
|
|
static inline void UC3CLK_StopPLL(const uint8_t Channel)
|
|
{
|
|
AVR32_PM.PLL[Channel].pllen = false;
|
|
}
|
|
|
|
/** Starts the given Generic Clock of the UC3 microcontroller, with the given options.
|
|
*
|
|
* \param[in] Channel Index of the Generic Clock to start.
|
|
* \param[in] Source Clock source for the Generic Clock, a value from \ref UC3_System_ClockSource_t.
|
|
* \param[in] SourceFreq Frequency of the Generic Clock's clock source, in Hz.
|
|
* \param[in] Frequency Target frequency of the Generic Clock's output.
|
|
*
|
|
* \return Boolean \c true if the Generic Clock was successfully started, \c false if invalid parameters specified.
|
|
*/
|
|
static inline bool UC3CLK_StartGenericClock(const uint8_t Channel,
|
|
const uint8_t Source,
|
|
const uint32_t SourceFreq,
|
|
const uint32_t Frequency) ATTR_ALWAYS_INLINE;
|
|
static inline bool UC3CLK_StartGenericClock(const uint8_t Channel,
|
|
const uint8_t Source,
|
|
const uint32_t SourceFreq,
|
|
const uint32_t Frequency)
|
|
{
|
|
if (Channel >= AVR32_PM_GCLK_NUM)
|
|
return false;
|
|
|
|
if (SourceFreq < Frequency)
|
|
return false;
|
|
|
|
switch (Source)
|
|
{
|
|
case CLOCK_SRC_OSC0:
|
|
AVR32_PM.GCCTRL[Channel].pllsel = false;
|
|
AVR32_PM.GCCTRL[Channel].oscsel = 0;
|
|
break;
|
|
case CLOCK_SRC_OSC1:
|
|
AVR32_PM.GCCTRL[Channel].pllsel = false;
|
|
AVR32_PM.GCCTRL[Channel].oscsel = 1;
|
|
break;
|
|
case CLOCK_SRC_PLL0:
|
|
AVR32_PM.GCCTRL[Channel].pllsel = true;
|
|
AVR32_PM.GCCTRL[Channel].oscsel = 0;
|
|
break;
|
|
case CLOCK_SRC_PLL1:
|
|
AVR32_PM.GCCTRL[Channel].pllsel = true;
|
|
AVR32_PM.GCCTRL[Channel].oscsel = 1;
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
AVR32_PM.GCCTRL[Channel].diven = (SourceFreq > Frequency) ? true : false;
|
|
AVR32_PM.GCCTRL[Channel].div = (((SourceFreq / Frequency) - 1) / 2);
|
|
AVR32_PM.GCCTRL[Channel].cen = true;
|
|
|
|
return true;
|
|
}
|
|
|
|
/** Stops the given generic clock of the UC3 microcontroller.
|
|
*
|
|
* \param[in] Channel Index of the generic clock to stop.
|
|
*
|
|
* \return Boolean \c true if the generic clock was successfully stopped, \c false if invalid parameters specified.
|
|
*/
|
|
static inline bool UC3CLK_StopGenericClock(const uint8_t Channel) ATTR_ALWAYS_INLINE;
|
|
static inline bool UC3CLK_StopGenericClock(const uint8_t Channel)
|
|
{
|
|
if (Channel >= AVR32_PM_GCLK_NUM)
|
|
return false;
|
|
|
|
AVR32_PM.GCCTRL[Channel].cen = false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/** Sets the clock source for the main microcontroller core. The given clock source should be configured
|
|
* and ready for use before this function is called.
|
|
*
|
|
* This function will configure the FLASH controller's wait states automatically to suit the given clock source.
|
|
*
|
|
* \param[in] Source Clock source for the CPU core, a value from \ref UC3_System_ClockSource_t.
|
|
* \param[in] SourceFreq Frequency of the CPU core's clock source, in Hz.
|
|
*
|
|
* \return Boolean \c true if the CPU core clock was successfully altered, \c false if invalid parameters specified.
|
|
*/
|
|
static inline bool UC3CLK_SetCPUClockSource(const uint8_t Source,
|
|
const uint32_t SourceFreq) ATTR_ALWAYS_INLINE;
|
|
static inline bool UC3CLK_SetCPUClockSource(const uint8_t Source,
|
|
const uint32_t SourceFreq)
|
|
{
|
|
if (SourceFreq > AVR32_PM_CPU_MAX_FREQ)
|
|
return false;
|
|
|
|
AVR32_FLASHC.FCR.fws = (SourceFreq > AVR32_FLASHC_FWS_0_MAX_FREQ) ? true : false;
|
|
|
|
switch (Source)
|
|
{
|
|
#if defined(AVR32_PM_MCCTRL_MCSEL_SLOW)
|
|
case CLOCK_SRC_SLOW_CLK:
|
|
AVR32_PM.MCCTRL.mcsel = AVR32_PM_MCCTRL_MCSEL_SLOW;
|
|
break;
|
|
#endif
|
|
#if defined(AVR32_PM_MCCTRL_MCSEL_OSC0)
|
|
case CLOCK_SRC_OSC0:
|
|
AVR32_PM.MCCTRL.mcsel = AVR32_PM_MCCTRL_MCSEL_OSC0;
|
|
break;
|
|
#endif
|
|
#if defined(AVR32_PM_MCCTRL_MCSEL_PLL0)
|
|
case CLOCK_SRC_PLL0:
|
|
AVR32_PM.MCCTRL.mcsel = AVR32_PM_MCCTRL_MCSEL_PLL0;
|
|
break;
|
|
#endif
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Disable C linkage for C++ Compilers: */
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif
|
|
|
|
/** @} */
|
|
|