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Diffstat (limited to 'protocol/lufa/LUFA-120730/LUFA/Platform/UC3/ClockManagement.h')
| -rw-r--r-- | protocol/lufa/LUFA-120730/LUFA/Platform/UC3/ClockManagement.h | 338 |
1 files changed, 338 insertions, 0 deletions
diff --git a/protocol/lufa/LUFA-120730/LUFA/Platform/UC3/ClockManagement.h b/protocol/lufa/LUFA-120730/LUFA/Platform/UC3/ClockManagement.h new file mode 100644 index 0000000000..fb62fdcc9e --- /dev/null +++ b/protocol/lufa/LUFA-120730/LUFA/Platform/UC3/ClockManagement.h @@ -0,0 +1,338 @@ +/*
+ 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 <LUFA/Platform/UC3/ClockManagement.h>
+ *
+ * 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 "../../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 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)
+ {
+ 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 sucessfully stopped, \c false if invalid parameters specified.
+ */
+ static inline bool AVR32CLK_StopGenericClock(const uint8_t Channel) ATTR_ALWAYS_INLINE;
+ static inline bool AVR32CLK_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 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)
+ {
+ 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
+
+/** @} */
+
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