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Implemented on-demand PLL clock generation for the U4, U6 and U7 series USB AVRs when automatic PLL mode is specified.

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This commit is contained in:
Dean Camera 2011-03-15 06:39:34 +00:00
parent 1a130eed6c
commit b35f93a372
3 changed files with 36 additions and 14 deletions
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40
LUFA/Drivers/USB/Core/AVR8/USBController_AVR8.c
View File

@ -65,6 +65,13 @@ void USB_Init(
else
USB_REG_Off();
if (!(USB_Options & USB_OPT_MANUAL_PLL))
{
#if defined(USB_SERIES_4_AVR)
PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
#endif
}
#if defined(USB_CAN_BE_BOTH)
if (Mode == USB_MODE_UID)
{
@ -118,22 +125,9 @@ void USB_ResetInterface(void)
USB_Controller_Reset();
if (!(USB_Options & USB_OPT_MANUAL_PLL))
{
#if defined(USB_SERIES_4_AVR)
PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
#endif
USB_PLL_On();
while (!(USB_PLL_IsReady()));
}
#if defined(USB_CAN_BE_BOTH)
if (UIDModeSelectEnabled)
{
UHWCON |= (1 << UIDE);
USB_INT_Enable(USB_INT_IDTI);
}
USB_INT_Enable(USB_INT_IDTI);
#endif
USB_CLK_Unfreeze();
@ -145,6 +139,16 @@ void USB_ResetInterface(void)
UHWCON |= (1 << UIMOD);
#endif
if (!(USB_Options & USB_OPT_MANUAL_PLL))
{
#if defined(USB_SERIES_2_AVR)
USB_PLL_On();
while (!(USB_PLL_IsReady()));
#else
USB_PLL_Off();
#endif
}
USB_Init_Device();
#endif
}
@ -153,6 +157,14 @@ void USB_ResetInterface(void)
#if defined(USB_CAN_BE_HOST)
UHWCON &= ~(1 << UIMOD);
if (!(USB_Options & USB_OPT_MANUAL_PLL))
{
#if defined(USB_CAN_BE_HOST)
USB_PLL_On();
while (!(USB_PLL_IsReady()));
#endif
}
USB_Init_Host();
#endif
}

9
LUFA/Drivers/USB/Core/AVR8/USBInterrupt_AVR8.c
View File

@ -90,11 +90,20 @@ ISR(USB_GEN_vect, ISR_BLOCK)
if (USB_VBUS_GetStatus())
{
if (!(USB_Options & USB_OPT_MANUAL_PLL))
{
USB_PLL_On();
while (!(USB_PLL_IsReady()));
}
USB_DeviceState = DEVICE_STATE_Powered;
EVENT_USB_Device_Connect();
}
else
{
if (!(USB_Options & USB_OPT_MANUAL_PLL))
USB_PLL_Off();
USB_DeviceState = DEVICE_STATE_Unattached;
EVENT_USB_Device_Disconnect();
}

1
LUFA/ManPages/ChangeLog.txt
View File

@ -58,6 +58,7 @@
* - Reduced latency for executing the Start-Of-Frame events (if enabled in the user application)
* - Removed Pipe_ClearErrorFlags(), pipe error flags are now automatically cleared when Pipe_ClearError() is called
* - Endpoint_ResetFIFO() renamed to Endpoint_ResetEndpoint(), to be consistent with the Pipe_ResetPipe() function name
* - Implemented on-demand PLL clock generation for the U4, U6 and U7 series USB AVRs when automatic PLL mode is specified
* - Library Applications:
* - Changed the XPLAINBridge software UART to use the regular timer CTC mode instead of the alternative CTC mode
* via the Input Capture register, to reduce user confusion