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[pub/lufa.git] / LUFA / Platform / XMEGA / ClockManagement.h

diff --git a/LUFA/Platform/XMEGA/ClockManagement.h b/LUFA/Platform/XMEGA/ClockManagement.h
index 1305d0e..20606a1 100644 (file)
--- a/LUFA/Platform/XMEGA/ClockManagement.h
+++ b/LUFA/Platform/XMEGA/ClockManagement.h
@@ -50,13 +50,13 @@
  *  Usage Example:
  *  \code
  *     #include <LUFA/Platform/XMEGA/ClockManagement.h>
  *  Usage Example:
  *  \code
  *     #include <LUFA/Platform/XMEGA/ClockManagement.h>

- *     
+ *

  *     void main(void)
  *     {
  *             // Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it
  *             XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, 32000000);
  *             XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL, F_CPU);
  *     void main(void)
  *     {
  *             // Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it
  *             XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, 32000000);
  *             XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL, F_CPU);

- *     
+ *

  *             // Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference
  *             XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
  *             XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, 48000000);
  *             // Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference
  *             XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
  *             XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, 48000000);


@@ -85,7 +85,7 @@
                                EXOSC_FREQ_2MHZ_MAX      = OSC_FRQRANGE_04TO2_gc,  /**< External crystal oscillator equal to or slower than 2MHz. */
                                EXOSC_FREQ_9MHZ_MAX      = OSC_FRQRANGE_2TO9_gc,   /**< External crystal oscillator equal to or slower than 9MHz. */
                                EXOSC_FREQ_12MHZ_MAX     = OSC_FRQRANGE_9TO12_gc,  /**< External crystal oscillator equal to or slower than 12MHz. */
                                EXOSC_FREQ_2MHZ_MAX      = OSC_FRQRANGE_04TO2_gc,  /**< External crystal oscillator equal to or slower than 2MHz. */
                                EXOSC_FREQ_9MHZ_MAX      = OSC_FRQRANGE_2TO9_gc,   /**< External crystal oscillator equal to or slower than 9MHz. */
                                EXOSC_FREQ_12MHZ_MAX     = OSC_FRQRANGE_9TO12_gc,  /**< External crystal oscillator equal to or slower than 12MHz. */

-                               EXOSC_FREQ_16MHZ_MAX     = OSC_FRQRANGE_12TO16_gc, /**< External crystal oscillator equal to or slower than 16MHz. */   
+                               EXOSC_FREQ_16MHZ_MAX     = OSC_FRQRANGE_12TO16_gc, /**< External crystal oscillator equal to or slower than 16MHz. */

                        };
 
                        /** Enum for the possible external oscillator statup times. */
                        };
 
                        /** Enum for the possible external oscillator statup times. */


@@ -97,7 +97,7 @@
                                EXOSC_START_1KCLK        = OSC_XOSCSEL_XTAL_1KCLK_gc,  /**< Wait 1K clock cycles before startup. */
                                EXOSC_START_16KCLK       = OSC_XOSCSEL_XTAL_16KCLK_gc, /**< Wait 16K clock cycles before startup. */
                        };
                                EXOSC_START_1KCLK        = OSC_XOSCSEL_XTAL_1KCLK_gc,  /**< Wait 1K clock cycles before startup. */
                                EXOSC_START_16KCLK       = OSC_XOSCSEL_XTAL_16KCLK_gc, /**< Wait 16K clock cycles before startup. */
                        };

-                       
+

                        /** Enum for the possible module clock sources. */
                        enum XMEGA_System_ClockSource_t
                        {
                        /** Enum for the possible module clock sources. */
                        enum XMEGA_System_ClockSource_t
                        {


@@ -132,8 +132,8 @@
                        {
                                OSC.XOSCCTRL  = (FreqRange | ((Startup == EXOSC_START_32KCLK) ? OSC_X32KLPM_bm : 0) | Startup);
                                OSC.CTRL     |= OSC_XOSCEN_bm;
                        {
                                OSC.XOSCCTRL  = (FreqRange | ((Startup == EXOSC_START_32KCLK) ? OSC_X32KLPM_bm : 0) | Startup);
                                OSC.CTRL     |= OSC_XOSCEN_bm;

-                               
-                               while (!(OSC.STATUS & OSC_XOSCRDY_bm));                         
+
+                               while (!(OSC.STATUS & OSC_XOSCRDY_bm));

                                return true;
                        }
 
                                return true;
                        }
 


@@ -162,14 +162,14 @@
                                                return true;
                                        case CLOCK_SRC_INT_RC32MHZ:
                                                OSC.CTRL |= OSC_RC32MEN_bm;
                                                return true;
                                        case CLOCK_SRC_INT_RC32MHZ:
                                                OSC.CTRL |= OSC_RC32MEN_bm;

-                                               while (!(OSC.STATUS & OSC_RC32MRDY_bm));                                        
+                                               while (!(OSC.STATUS & OSC_RC32MRDY_bm));

                                                return true;
                                        case CLOCK_SRC_INT_RC32KHZ:
                                                OSC.CTRL |= OSC_RC32KEN_bm;
                                                return true;
                                        case CLOCK_SRC_INT_RC32KHZ:
                                                OSC.CTRL |= OSC_RC32KEN_bm;

-                                               while (!(OSC.STATUS & OSC_RC32KRDY_bm));                                        
+                                               while (!(OSC.STATUS & OSC_RC32KRDY_bm));

                                                return true;
                                }
                                                return true;
                                }

-                       
+

                                return false;
                        }
 
                                return false;
                        }
 


@@ -178,7 +178,7 @@
                         *  \param[in] Source  Internal oscillator to stop, a value from \ref XMEGA_System_ClockSource_t.
                         *
                         *  \return Boolean \c true if the internal oscillator was successfully stopped, \c false if invalid parameters specified.
                         *  \param[in] Source  Internal oscillator to stop, a value from \ref XMEGA_System_ClockSource_t.
                         *
                         *  \return Boolean \c true if the internal oscillator was successfully stopped, \c false if invalid parameters specified.

-                        */                     
+                        */

                        static inline bool XMEGACLK_StopInternalOscillator(const uint8_t Source) ATTR_ALWAYS_INLINE;
                        static inline bool XMEGACLK_StopInternalOscillator(const uint8_t Source)
                        {
                        static inline bool XMEGACLK_StopInternalOscillator(const uint8_t Source) ATTR_ALWAYS_INLINE;
                        static inline bool XMEGACLK_StopInternalOscillator(const uint8_t Source)
                        {


@@ -194,7 +194,7 @@
                                                OSC.CTRL &= ~OSC_RC32KEN_bm;
                                                return true;
                                }
                                                OSC.CTRL &= ~OSC_RC32KEN_bm;
                                                return true;
                                }

-                       
+

                                return false;
                        }
 
                                return false;
                        }
 


@@ -216,10 +216,10 @@
                                                             const uint32_t Frequency)
                        {
                                uint8_t MulFactor = (Frequency / SourceFreq);
                                                             const uint32_t Frequency)
                        {
                                uint8_t MulFactor = (Frequency / SourceFreq);

-                               
+

                                if (SourceFreq > Frequency)
                                if (SourceFreq > Frequency)

-                                 return false;                         
-                       
+                                 return false;
+

                                switch (Source)
                                {
                                        case CLOCK_SRC_INT_RC2MHZ:
                                switch (Source)
                                {
                                        case CLOCK_SRC_INT_RC2MHZ:


@@ -236,7 +236,7 @@
                                }
 
                                OSC.CTRL |= OSC_PLLEN_bm;
                                }
 
                                OSC.CTRL |= OSC_PLLEN_bm;

-                               
+

                                while (!(OSC.STATUS & OSC_PLLRDY_bm));
                                return true;
                        }
                                while (!(OSC.STATUS & OSC_PLLRDY_bm));
                                return true;
                        }


@@ -247,7 +247,7 @@
                        {
                                OSC.CTRL &= ~OSC_PLLEN_bm;
                        }
                        {
                                OSC.CTRL &= ~OSC_PLLEN_bm;
                        }

-                       
+

                        /** Starts the DFLL of the XMEGA microcontroller, with the given options.
                         *
                         *  \param[in] Source     RC Clock source for the DFLL, a value from \ref XMEGA_System_ClockSource_t.
                        /** Starts the DFLL of the XMEGA microcontroller, with the given options.
                         *
                         *  \param[in] Source     RC Clock source for the DFLL, a value from \ref XMEGA_System_ClockSource_t.


@@ -264,7 +264,7 @@
                                                              const uint32_t Frequency)
                        {
                                uint16_t DFLLCompare = (Frequency / 1000);
                                                              const uint32_t Frequency)
                        {
                                uint16_t DFLLCompare = (Frequency / 1000);

-                               
+

                                switch (Source)
                                {
                                        case CLOCK_SRC_INT_RC2MHZ:
                                switch (Source)
                                {
                                        case CLOCK_SRC_INT_RC2MHZ:


@@ -291,7 +291,7 @@
                                        default:
                                                return false;
                                }
                                        default:
                                                return false;
                                }

-                               
+

                                return true;
                        }
 
                                return true;
                        }
 


@@ -315,7 +315,7 @@
                                        default:
                                                return false;
                                }
                                        default:
                                                return false;
                                }

-                               
+

                                return true;
                        }
 
                                return true;
                        }
 


@@ -333,7 +333,7 @@
                                                                      const uint32_t SourceFreq)
                        {
                                uint8_t ClockSourceMask = 0;
                                                                      const uint32_t SourceFreq)
                        {
                                uint8_t ClockSourceMask = 0;

-                       
+

                                switch (Source)
                                {
                                        case CLOCK_SRC_INT_RC2MHZ:
                                switch (Source)
                                {
                                        case CLOCK_SRC_INT_RC2MHZ:


@@ -354,16 +354,16 @@
                                        default:
                                                return false;
                                }
                                        default:
                                                return false;
                                }

-                               
+

                                uint_reg_t CurrentGlobalInt = GetGlobalInterruptMask();
                                GlobalInterruptDisable();
 
                                CCP      = CCP_IOREG_gc;
                                CLK_CTRL = ClockSourceMask;
                                uint_reg_t CurrentGlobalInt = GetGlobalInterruptMask();
                                GlobalInterruptDisable();
 
                                CCP      = CCP_IOREG_gc;
                                CLK_CTRL = ClockSourceMask;

-                               
+

                                SetGlobalInterruptMask(CurrentGlobalInt);
                                SetGlobalInterruptMask(CurrentGlobalInt);

-                               
-                               Delay_MS(1);                            
+
+                               Delay_MS(1);

                                return (CLK.CTRL == ClockSourceMask);
                        }
 
                                return (CLK.CTRL == ClockSourceMask);
                        }
 


@@ -375,3 +375,4 @@
 #endif
 
 /** @} */
 #endif
 
 /** @} */

+