Add additional sanity checks to the inputs of several AVR32 platform clock management...

diff --git a/LUFA/Platform/UC3/ClockManagement.h b/LUFA/Platform/UC3/ClockManagement.h
index 51cb0ff..ac24314 100644 (file)
--- a/LUFA/Platform/UC3/ClockManagement.h
+++ b/LUFA/Platform/UC3/ClockManagement.h
@@ -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)