X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/13951ab043c43d0e3ea4ac0ae6a641fd88e7fcb0..d4684b29b9a3a4b45b6422d0f1cf6c79639c84c8:/LUFA/Platform/UC3/ClockManagement.h diff --git a/LUFA/Platform/UC3/ClockManagement.h b/LUFA/Platform/UC3/ClockManagement.h index 60a3d18f4..2cd96d2ec 100644 --- a/LUFA/Platform/UC3/ClockManagement.h +++ b/LUFA/Platform/UC3/ClockManagement.h @@ -1,317 +1,325 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2011. - - dean [at] fourwalledcubicle [dot] com - www.lufa-lib.org -*/ - -/* - Copyright 2011 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 disclaim 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 - * \defgroup Group_PlatformDrivers_UC3Clocks UC3 Clock Management Driver - LUFA/Platform/UC3/ClockManagement.h - * \brief Module Clock Driver for the AVR32 UC3 microcontrollers. - * - * \section Sec_Dependencies Module Source Dependencies - * The following files must be built with any user project that uses this module: - * - None - * - * \section Sec_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 - * - * void main(void) - * { - * // Start the master external oscillator which will be used as the main clock reference - * AVR32CLK_StartExternalOscillator(0, EXOSC_MODE_8MHZ_OR_MORE, EXOSC_START_0CLK); - * - * // Start the PLL for the CPU clock, switch CPU to it - * AVR32CLK_StartPLL(0, CLOCK_SRC_OSC0, 12000000, F_CPU); - * AVR32CLK_SetCPUClockSource(CLOCK_SRC_PLL0, F_CPU); - * - * // Start the PLL for the USB Generic Clock module - * AVR32CLK_StartPLL(1, CLOCK_SRC_OSC0, 12000000, 48000000); - * } - * \endcode - * - * @{ - */ - -#ifndef _UC3_CLOCK_MANAGEMENT_H_ -#define _UC3_CLOCK_MANAGEMENT_H_ - - /* Includes: */ - #include - #include - #include - - #include - - /* 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 Extern_OSC_ClockTypes_t - { - EXOSC_MODE_CLOCK = 0, /**< External clock (non-crystal) mode. */ - EXOSC_MODE_900KHZ_MAX = 1, /**< External crystal oscillator equal to or slower than 900KHz. */ - EXOSC_MODE_3MHZ_MAX = 2, /**< External crystal oscillator equal to or slower than 3MHz. */ - EXOSC_MODE_8MHZ_MAX = 3, /**< External crystal oscillator equal to or slower than 8MHz. */ - EXOSC_MODE_8MHZ_OR_MORE = 4, /**< External crystal oscillator equal to or faster than 8MHz. */ - }; - - /** Enum for the possible external oscillator statup times. */ - enum Extern_OSC_ClockStartup_t - { - EXOSC_START_0CLK = 0, /**< Immediate startup, no delay. */ - EXOSC_START_64CLK = 1, /**< Wait 64 clock cyles before startup for stability. */ - EXOSC_START_128CLK = 2, /**< Wait 128 clock cyles before startup for stability. */ - EXOSC_START_2048CLK = 3, /**< Wait 2048 clock cyles before startup for stability. */ - EXOSC_START_4096CLK = 4, /**< Wait 4096 clock cyles before startup for stability. */ - EXOSC_START_8192CLK = 5, /**< Wait 8192 clock cyles before startup for stability. */ - EXOSC_START_16384CLK = 6, /**< Wait 16384 clock cyles before startup for stability. */ - }; - - /** Enum for the possible module clock sources. */ - enum 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 Extern_OSC_ClockTypes_t. - * \param[in] Startup Statup time of the external oscillator, a value from \ref Extern_OSC_ClockStartup_t. - * - * \return Boolean \c true if the external oscillator was successfully started, \c false if invalid parameters specified. - */ - static inline uint8_t AVR32CLK_StartExternalOscillator(const uint8_t Channel, - const uint8_t Type, - const uint8_t Startup) ATTR_ALWAYS_INLINE; - static inline uint8_t AVR32CLK_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 AVR32CLK_StopExternalOscillator(const uint8_t Channel) ATTR_ALWAYS_INLINE; - static inline void AVR32CLK_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. - * - * \param[in] Channel Index of the PLL to start. - * \param[in] Source Clock source for the PLL, a value from \ref 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 AVR32CLK_StartPLL(const uint8_t Channel, - const uint8_t Source, - const uint32_t SourceFreq, - const uint32_t Frequency) ATTR_ALWAYS_INLINE; - static inline bool AVR32CLK_StartPLL(const uint8_t Channel, - const uint8_t Source, - const uint32_t SourceFreq, - const uint32_t Frequency) - { - 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 AVR32CLK_StopPLL(const uint8_t Channel) ATTR_ALWAYS_INLINE; - static inline void AVR32CLK_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 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 AVR32CLK_StartGenericClock(const uint8_t Channel, - const uint8_t Source, - const uint32_t SourceFreq, - const uint32_t Frequency) ATTR_ALWAYS_INLINE; - static inline bool AVR32CLK_StartGenericClock(const uint8_t Channel, - const uint8_t Source, - const uint32_t SourceFreq, - const uint32_t Frequency) - { - switch (Source) - { - case CLOCK_SRC_OSC0: - AVR32_PM.GCCTRL[Channel].pllsel = 0; - AVR32_PM.GCCTRL[Channel].oscsel = 0; - break; - case CLOCK_SRC_OSC1: - AVR32_PM.GCCTRL[Channel].pllsel = 0; - AVR32_PM.GCCTRL[Channel].oscsel = 1; - break; - case CLOCK_SRC_PLL0: - AVR32_PM.GCCTRL[Channel].pllsel = 1; - AVR32_PM.GCCTRL[Channel].oscsel = 0; - break; - case CLOCK_SRC_PLL1: - AVR32_PM.GCCTRL[Channel].pllsel = 1; - AVR32_PM.GCCTRL[Channel].oscsel = 1; - break; - default: - return false; - } - - if (SourceFreq < Frequency) - 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. - */ - static inline void AVR32CLK_StopGenericClock(const uint8_t Channel) ATTR_ALWAYS_INLINE; - static inline void AVR32CLK_StopGenericClock(const uint8_t Channel) - { - AVR32_PM.GCCTRL[Channel].cen = false; - } - - /** 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 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 sucessfully altered, \c false if invalid parameters specified. - */ - static inline bool AVR32CLK_SetCPUClockSource(const uint8_t Source, - const uint32_t SourceFreq) ATTR_ALWAYS_INLINE; - static inline bool AVR32CLK_SetCPUClockSource(const uint8_t Source, - const uint32_t SourceFreq) - { - AVR32_FLASHC.FCR.fws = (SourceFreq > 30000000) ? true : false; - - switch (Source) - { - case CLOCK_SRC_SLOW_CLK: - AVR32_PM.MCCTRL.mcsel = 0; - break; - case CLOCK_SRC_OSC0: - AVR32_PM.MCCTRL.mcsel = 1; - break; - case CLOCK_SRC_PLL0: - AVR32_PM.MCCTRL.mcsel = 2; - break; - default: - return false; - } - - return true; - } - - /* Disable C linkage for C++ Compilers: */ - #if defined(__cplusplus) - } - #endif - -#endif - -/** @} */ +/* + LUFA Library + Copyright (C) Dean Camera, 2012. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2012 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 disclaim 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_Dependencies Module Source Dependencies + * The following files must be built with any user project that uses this module: + * - None + * + * \section Sec_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 + * + * void main(void) + * { + * // Start the master external oscillator which will be used as the main clock reference + * AVR32CLK_StartExternalOscillator(0, EXOSC_MODE_8MHZ_OR_MORE, EXOSC_START_0CLK); + * + * // Start the PLL for the CPU clock, switch CPU to it + * AVR32CLK_StartPLL(0, CLOCK_SRC_OSC0, 12000000, F_CPU); + * AVR32CLK_SetCPUClockSource(CLOCK_SRC_PLL0, F_CPU); + * + * // Start the PLL for the USB Generic Clock module + * AVR32CLK_StartPLL(1, CLOCK_SRC_OSC0, 12000000, 48000000); + * } + * \endcode + * + * @{ + */ + +#ifndef _UC3_CLOCK_MANAGEMENT_H_ +#define _UC3_CLOCK_MANAGEMENT_H_ + + /* Includes: */ + #include + + /* 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 statup 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 cyles before startup for stability. */ + EXOSC_START_128CLK = AVR32_PM_OSCCTRL0_STARTUP_128_RCOSC, /**< Wait 128 clock cyles before startup for stability. */ + EXOSC_START_2048CLK = AVR32_PM_OSCCTRL0_STARTUP_2048_RCOSC, /**< Wait 2048 clock cyles before startup for stability. */ + EXOSC_START_4096CLK = AVR32_PM_OSCCTRL0_STARTUP_4096_RCOSC, /**< Wait 4096 clock cyles before startup for stability. */ + EXOSC_START_8192CLK = AVR32_PM_OSCCTRL0_STARTUP_8192_RCOSC, /**< Wait 8192 clock cyles before startup for stability. */ + EXOSC_START_16384CLK = AVR32_PM_OSCCTRL0_STARTUP_16384_RCOSC, /**< Wait 16384 clock cyles 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 Statup 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 AVR32CLK_StartExternalOscillator(const uint8_t Channel, + const uint8_t Type, + const uint8_t Startup) ATTR_ALWAYS_INLINE; + static inline bool AVR32CLK_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 AVR32CLK_StopExternalOscillator(const uint8_t Channel) ATTR_ALWAYS_INLINE; + static inline void AVR32CLK_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 AVR32CLK_StartPLL(const uint8_t Channel, + const uint8_t Source, + const uint32_t SourceFreq, + const uint32_t Frequency) ATTR_ALWAYS_INLINE; + static inline bool AVR32CLK_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 AVR32CLK_StopPLL(const uint8_t Channel) ATTR_ALWAYS_INLINE; + static inline void AVR32CLK_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 AVR32CLK_StartGenericClock(const uint8_t Channel, + const uint8_t Source, + const uint32_t SourceFreq, + const uint32_t Frequency) ATTR_ALWAYS_INLINE; + static inline bool AVR32CLK_StartGenericClock(const uint8_t Channel, + const uint8_t Source, + const uint32_t SourceFreq, + const uint32_t Frequency) + { + 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; + } + + if (SourceFreq < Frequency) + 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. + */ + static inline void AVR32CLK_StopGenericClock(const uint8_t Channel) ATTR_ALWAYS_INLINE; + static inline void AVR32CLK_StopGenericClock(const uint8_t Channel) + { + AVR32_PM.GCCTRL[Channel].cen = false; + } + + /** 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 sucessfully altered, \c false if invalid parameters specified. + */ + static inline bool AVR32CLK_SetCPUClockSource(const uint8_t Source, + const uint32_t SourceFreq) ATTR_ALWAYS_INLINE; + static inline bool AVR32CLK_SetCPUClockSource(const uint8_t Source, + const uint32_t SourceFreq) + { + AVR32_FLASHC.FCR.fws = (SourceFreq > 30000000) ? 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 + +/** @} */ +