X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/f2ae4dc255bd86438cffb62c138326b1c0b5725f..a5abb0eb3f368f0f090ebfd7f9fc22e94466f31e:/LUFA/Platform/UC3/ClockManagement.h

diff --git a/LUFA/Platform/UC3/ClockManagement.h b/LUFA/Platform/UC3/ClockManagement.h
index 2cd96d2ec..b6b6ece27 100644
--- a/LUFA/Platform/UC3/ClockManagement.h
+++ b/LUFA/Platform/UC3/ClockManagement.h
@@ -72,7 +72,7 @@
 #define _UC3_CLOCK_MANAGEMENT_H_
 
 	/* Includes: */
-		#include <LUFA/Common/Common.h>
+		#include "../../Common/Common.h"
 
 	/* Enable C linkage for C++ Compilers: */
 		#if defined(__cplusplus)
@@ -91,16 +91,16 @@
 				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 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 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. */
+				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. */
@@ -231,6 +231,12 @@
 			                                              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:
@@ -253,9 +259,6 @@
 						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;
@@ -266,11 +269,18 @@
 			/** 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 void AVR32CLK_StopGenericClock(const uint8_t Channel) ATTR_ALWAYS_INLINE;
-			static inline void AVR32CLK_StopGenericClock(const uint8_t Channel)
+			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
@@ -288,8 +298,11 @@
 			static inline bool AVR32CLK_SetCPUClockSource(const uint8_t Source,
 			                                              const uint32_t SourceFreq)
 			{
-				AVR32_FLASHC.FCR.fws = (SourceFreq > 30000000) ? true : false;
+				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)