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USB XMEGA support improvements; add DFLL clock platform support, ensure the endpoint table is correctly aligned and configured in the USB controller.

This commit is contained in:
Dean Camera 2011-10-07 05:52:35 +00:00
parent db73b11244
commit a4d67bb6ff
2 changed files with 87 additions and 2 deletions
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8
LUFA/Drivers/USB/Core/XMEGA/USBController_XMEGA.c
View File

@ -40,7 +40,7 @@ volatile uint8_t USB_CurrentMode = USB_MODE_None;
volatile uint8_t USB_Options;
#endif
USB_EP_TABLE_t USB_EndpointTable ATTR_ALIGNED(2);
USB_EP_TABLE_t USB_EndpointTable ATTR_ALIGNED(4);
void USB_Init(
#if defined(USB_CAN_BE_BOTH)
@ -72,6 +72,8 @@ void USB_Init(
NVM.CMD = NVM_CMD_READ_CALIB_ROW_gc;
USB.CAL1 = pgm_read_byte(offsetof(NVM_PROD_SIGNATURES_t, USBCAL1));
USB.EPPTR = (intptr_t)&USB_EndpointTable;
if ((USB_Options & USB_OPT_BUSEVENT_PRIHIGH) == USB_OPT_BUSEVENT_PRIHIGH)
USB.INTCTRLA = (3 << USB_INTLVL_gp);
else if ((USB_Options & USB_OPT_BUSEVENT_PRIMED) == USB_OPT_BUSEVENT_PRIMED)
@ -81,7 +83,7 @@ void USB_Init(
SetGlobalInterruptMask(CurrentGlobalInt);
USB_ResetInterface();
USB_ResetInterface();
}
void USB_Disable(void)
@ -102,6 +104,8 @@ void USB_ResetInterface(void)
else
CLK.USBCTRL = ((((F_USB / 48000000) - 1) << CLK_USBPSDIV_gp) | CLK_USBSRC_PLL_gc | CLK_USBSEN_bm);
USB_Device_SetDeviceAddress(0);
USB_INT_DisableAllInterrupts();
USB_INT_ClearAllInterrupts();

81
LUFA/Platform/XMEGA/ClockManagement.h
View File

@ -108,6 +108,14 @@
CLOCK_SRC_PLL = 4, /**< Clock sourced from the Internal PLL clock. */
};
/** Enum for the possible DFLL clock reference sources. */
enum XMEGA_System_DFLLReference_t
{
DFLL_REF_INT_RC32KHZ = 0, /**< Reference clock sourced from the Internal 32KHz RC Oscillator clock. */
DFLL_REF_EXT_RC32KHZ = 1, /**< Reference clock sourced from the External 32KHz RC Oscillator clock connected to TOSC pins. */
DFLL_REF_INT_USBSOF = 2, /**< Reference clock sourced from the USB Start Of Frame packets. */
};
/* Inline Functions: */
/** Starts the external oscillator of the XMEGA microcontroller, with the given options. This routine blocks until
* the oscillator is ready for use.
@ -240,6 +248,79 @@
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.
* \param[in] Reference Reference clock source for the DFLL, an value from \ref XMEGA_System_DFLLReference_t
* \param[in] Frequency Target frequency of the DFLL's output.
*
* \return Boolean \c true if the DFLL was successfully started, \c false if invalid parameters specified.
*/
static inline bool XMEGACLK_StartDFLL(const uint8_t Source,
const uint8_t Reference,
const uint32_t Frequency) ATTR_ALWAYS_INLINE;
static inline bool XMEGACLK_StartDFLL(const uint8_t Source,
const uint8_t Reference,
const uint32_t Frequency)
{
uint16_t DFLLCompare = (Frequency / 1024);
uint16_t DFFLCal = 0;
if (Reference == DFLL_REF_INT_USBSOF)
{
NVM.CMD = NVM_CMD_READ_CALIB_ROW_gc;
DFFLCal = ((0x00 << 8) | pgm_read_byte(offsetof(NVM_PROD_SIGNATURES_t, USBRCOSC)));
}
switch (Source)
{
case CLOCK_SRC_INT_RC2MHZ:
OSC.DFLLCTRL |= (Reference << OSC_RC32MCREF_gp);
DFLLRC2M.COMP1 = (DFLLCompare >> 8);
DFLLRC2M.COMP2 = (DFLLCompare & 0xFF);
DFLLRC2M.CALA = (DFFLCal >> 8);
DFLLRC2M.CALB = (DFFLCal & 0xFF);
DFLLRC2M.CTRL = DFLL_ENABLE_bm;
break;
case CLOCK_SRC_INT_RC32MHZ:
OSC.DFLLCTRL |= (Reference << OSC_RC32MCREF_gp);
DFLLRC32M.COMP1 = (DFLLCompare >> 8);
DFLLRC32M.COMP2 = (DFLLCompare & 0xFF);
DFLLRC32M.CALA = (DFFLCal >> 8);
DFLLRC32M.CALB = (DFFLCal & 0xFF);
DFLLRC32M.CTRL = DFLL_ENABLE_bm;
break;
default:
return false;
}
return true;
}
/** Stops the given DFLL of the XMEGA microcontroller.
*
* \param[in] Source RC Clock source for the DFLL to be stopped, a value from \ref XMEGA_System_ClockSource_t.
*
* \return Boolean \c true if the DFLL was successfully stopped, \c false if invalid parameters specified.
*/
static inline bool XMEGACLK_StopDFLL(const uint8_t Source) ATTR_ALWAYS_INLINE;
static inline bool XMEGACLK_StopDFLL(const uint8_t Source)
{
switch (Source)
{
case CLOCK_SRC_INT_RC2MHZ:
DFLLRC2M.CTRL = 0;
break;
case CLOCK_SRC_INT_RC32MHZ:
DFLLRC32M.CTRL = 0;
break;
default:
return 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.
*