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| author | Dean Camera <dean@fourwalledcubicle.com> | 2011-06-29 05:57:29 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2011-06-29 05:57:29 +0000 |
| commit | c6a7a028bd1f6a41195ed95e3c6b4291105ef448 (patch) | |
| tree | efbd7420de34d73a174bcf80340b28bbafabdbfd /LUFA/Platform/UC3/ClockManagement.h | |
| parent | 75da0d187741fa272a19073da26e94aa7c3c5263 (diff) | |
| download | lufa-c6a7a028bd1f6a41195ed95e3c6b4291105ef448.tar.gz lufa-c6a7a028bd1f6a41195ed95e3c6b4291105ef448.tar.bz2 lufa-c6a7a028bd1f6a41195ed95e3c6b4291105ef448.zip | |
Merge over core library changes from the MultiArchDemos branch.
Diffstat (limited to 'LUFA/Platform/UC3/ClockManagement.h')
| -rw-r--r-- | LUFA/Platform/UC3/ClockManagement.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/LUFA/Platform/UC3/ClockManagement.h b/LUFA/Platform/UC3/ClockManagement.h new file mode 100644 index 000000000..2b7325ba8 --- /dev/null +++ b/LUFA/Platform/UC3/ClockManagement.h @@ -0,0 +1,181 @@ +/*
+ 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.
+*/
+
+#ifndef _CLOCK_MANAGEMENT_H_
+#define _CLOCK_MANAGEMENT_H_
+
+ /* Includes: */
+ #include <avr32/io.h>
+ #include <stdbool.h>
+ #include <stdint.h>
+
+ #include <LUFA/Common/Common.h>
+
+ /* Macros: */
+ enum Extern_OSC_ClockStartup_t
+ {
+ EXOSC_START_0CLK = 0,
+ EXOSC_START_64CLK = 1,
+ EXOSC_START_128CLK = 2,
+ EXOSC_START_2048CLK = 3,
+ EXOSC_START_4096CLK = 4,
+ EXOSC_START_8192CLK = 5,
+ EXOSC_START_16384CLK = 6,
+ };
+
+ enum Extern_OSC_ClockMode_t
+ {
+ EXOSC_MODE_CLOCK = 0,
+ EXOSC_MODE_900KHZ_MAX = 1,
+ EXOSC_MODE_3MHZ_MAX = 2,
+ EXOSC_MODE_8MHZ_MAX = 3,
+ EXOSC_MODE_8MHZ_OR_MORE = 4,
+ };
+
+ enum
+ {
+ CLOCK_SRC_SLOW_CLK = 0,
+ CLOCK_SRC_OSC0 = 1,
+ CLOCK_SRC_OSC1 = 2,
+ CLOCK_SRC_PLL0 = 3,
+ CLOCK_SRC_PLL1 = 4,
+ };
+
+ /* Inline Functions: */
+ static inline bool AVR32CLK_StartExternalOscillator(const uint8_t Channel,
+ const uint8_t Type,
+ const uint8_t Startup)
+ {
+ AVR32_PM.OSCCTRL0.startup = Startup;
+ AVR32_PM.OSCCTRL0.mode = Type;
+ AVR32_PM.mcctrl |= (1 << (AVR32_PM_MCCTRL_OSC0EN_OFFSET + Channel));
+
+ while (!(AVR32_PM.poscsr & (1 << (AVR32_PM_POSCSR_OSC0RDY_OFFSET + Channel))));
+ return true;
+ }
+
+ static inline void AVR32CLK_StopExternalOscillator(const uint8_t Channel)
+ {
+ AVR32_PM.mcctrl &= ~(1 << (AVR32_PM_MCCTRL_OSC0EN_OFFSET + Channel));
+ }
+
+ 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;
+ }
+
+ static inline void AVR32CLK_StopPLL(const uint8_t Channel)
+ {
+ AVR32_PM.PLL[Channel].pllen = false;
+ }
+
+ 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;
+ }
+
+ 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;
+ }
+
+ static inline void AVR32CLK_StopGenericClock(const uint8_t Channel)
+ {
+ AVR32_PM.GCCTRL[Channel].cen = false;
+ }
+
+ 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;
+ }
+
+#endif
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