forked from mfulz_github/qmk_firmware
Added HOST_STATE_AS_GPIOR1 and DEVICE_STATE_AS_GPIOR0 compile time options, the latter of which is used in the bootloaders, to reduce code size.
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Dean Camera
parent
23c1653efe
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c1be307393
@ -117,6 +117,7 @@ LUFA_PATH = ../..
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# LUFA library compile-time options
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LUFA_OPTS = -D USB_DEVICE_ONLY
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LUFA_OPTS += -D USE_NONSTANDARD_DESCRIPTOR_NAMES
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LUFA_OPTS += -D DEVICE_STATE_AS_GPIOR0
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LUFA_OPTS += -D FIXED_CONTROL_ENDPOINT_SIZE=8
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LUFA_OPTS += -D TOTAL_NUM_CONFIGURATIONS=1
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LUFA_OPTS += -D USE_RAM_DESCRIPTORS
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@ -117,6 +117,7 @@ LUFA_PATH = ../..
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# LUFA library compile-time options
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LUFA_OPTS = -D USB_DEVICE_ONLY
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LUFA_OPTS += -D USE_NONSTANDARD_DESCRIPTOR_NAMES
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LUFA_OPTS += -D DEVICE_STATE_AS_GPIOR0
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LUFA_OPTS += -D CONTROL_ONLY_DEVICE
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LUFA_OPTS += -D FIXED_CONTROL_ENDPOINT_SIZE=32
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LUFA_OPTS += -D TOTAL_NUM_CONFIGURATIONS=1
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@ -118,6 +118,7 @@ LUFA_PATH = ../..
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LUFA_OPTS = -D USB_DEVICE_ONLY
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LUFA_OPTS += -D USE_NONSTANDARD_DESCRIPTOR_NAMES
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LUFA_OPTS += -D CONTROL_ONLY_DEVICE
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LUFA_OPTS += -D DEVICE_STATE_AS_GPIOR0
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LUFA_OPTS += -D FIXED_CONTROL_ENDPOINT_SIZE=8
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LUFA_OPTS += -D TOTAL_NUM_CONFIGURATIONS=1
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LUFA_OPTS += -D USE_RAM_DESCRIPTORS
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@ -36,11 +36,11 @@
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volatile bool USB_IsInitialized;
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USB_Request_Header_t USB_ControlRequest;
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#if defined(USB_CAN_BE_HOST)
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#if defined(USB_CAN_BE_HOST) && !defined(HOST_STATE_AS_GPIOR1)
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volatile uint8_t USB_HostState;
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#endif
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#if defined(USB_CAN_BE_DEVICE)
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#if defined(USB_CAN_BE_DEVICE) && !defined(DEVICE_STATE_AS_GPIOR0)
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volatile uint8_t USB_DeviceState;
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#endif
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@ -52,7 +52,7 @@
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* Public Interface - May be used in end-application: */
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/* Global Variables: */
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/** Indicates if the USB interface is currently initialized but not necessarily connected to a host
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@ -74,40 +74,58 @@
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extern USB_Request_Header_t USB_ControlRequest;
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#if defined(USB_CAN_BE_HOST) || defined(__DOXYGEN__)
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/** Indicates the current host state machine state. When in host mode, this indicates the state
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* via one of the values of the \ref USB_Host_States_t enum values.
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*
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* This value may be altered by the user application to implement the \ref HOST_STATE_Addressed,
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* \ref HOST_STATE_Configured and \ref HOST_STATE_Suspended states which are not implemented by
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* the library.
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*
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* \note This global is only present if the user application can be a USB host.
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*
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* \see \ref USB_Host_States_t for a list of possible device states
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*
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* \ingroup Group_Host
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*/
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extern volatile uint8_t USB_HostState;
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#if !defined(HOST_STATE_AS_GPIOR1) || defined(__DOXYGEN__)
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/** Indicates the current host state machine state. When in host mode, this indicates the state
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* via one of the values of the \ref USB_Host_States_t enum values.
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*
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* This value may be altered by the user application to implement the \ref HOST_STATE_Addressed,
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* \ref HOST_STATE_Configured and \ref HOST_STATE_Suspended states which are not implemented by
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* the library.
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*
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* To reduce program size and speed up checks of this global, it can be placed into the AVR's GPIOR1
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* hardware register instead of RAM by defining the HOST_STATE_AS_GPIOR1 token in the project
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* makefile and passing it to the compiler via the -D switch. When defined, the GPIOR1 register should
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* not be used in the user application except implicitly via the library APIs.
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*
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* \note This global is only present if the user application can be a USB host.
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*
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* \see \ref USB_Host_States_t for a list of possible device states
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*
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* \ingroup Group_Host
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*/
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extern volatile uint8_t USB_HostState;
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#else
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#define USB_HostState GPIOR1
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#endif
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#endif
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#if defined(USB_CAN_BE_DEVICE) || defined(__DOXYGEN__)
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/** Indicates the current device state machine state. When in device mode, this indicates the state
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* via one of the values of the \ref USB_Device_States_t enum values.
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*
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* This value should not be altered by the user application as it is handled automatically by the
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* library. The only exception to this rule is if the NO_LIMITED_CONTROLLER_CONNECT token is used
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* (see \ref EVENT_USB_Connect() and \ref EVENT_USB_Disconnect() events).
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*
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* \note This global is only present if the user application can be a USB device.
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*
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* \note This variable should be treated as read-only in the user application, and never manually
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* changed in value except in the circumstances outlined above.
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*
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* \see \ref USB_Device_States_t for a list of possible device states
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*
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* \ingroup Group_Device
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*/
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extern volatile uint8_t USB_DeviceState;
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#if !defined(DEVICE_STATE_AS_GPIOR0) || defined(__DOXYGEN__)
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/** Indicates the current device state machine state. When in device mode, this indicates the state
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* via one of the values of the \ref USB_Device_States_t enum values.
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*
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* This value should not be altered by the user application as it is handled automatically by the
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* library. The only exception to this rule is if the NO_LIMITED_CONTROLLER_CONNECT token is used
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* (see \ref EVENT_USB_Connect() and \ref EVENT_USB_Disconnect() events).
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*
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* To reduce program size and speed up checks of this global, it can be placed into the AVR's GPIOR0
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* hardware register instead of RAM by defining the DEVICE_STATE_AS_GPIOR0 token in the project
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* makefile and passing it to the compiler via the -D switch. When defined, the GPIOR0 register should
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* not be used in the user application except implicitly via the library APIs.
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*
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* \note This global is only present if the user application can be a USB device.
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*
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* \note This variable should be treated as read-only in the user application, and never manually
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* changed in value except in the circumstances outlined above.
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*
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* \see \ref USB_Device_States_t for a list of possible device states
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*
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* \ingroup Group_Device
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*/
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extern volatile uint8_t USB_DeviceState;
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#else
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#define USB_DeviceState GPIOR0
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#endif
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#endif
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/* Function Prototypes: */
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@ -34,6 +34,7 @@
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* - Added new Benito Arduino Programmer project
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* - Added new LEDs_ToggleLEDs() function to the LEDs driver
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* - Added new Pipe_BoundEndpointNumber() and Pipe_IsEndpointBound() functions
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* - Added new DEVICE_STATE_AS_GPIOR0 and DEVICE_STATE_AS_GPIOR1 compile time options
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*
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* <b>Changed:</b>
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* - Deprecated psuedo-scheduler and removed dynamic memory allocator from the library (first no longer needed and second unused)
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@ -95,6 +95,18 @@
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* defined to a non-zero value instead to give the size in bytes of the control endpoint, to reduce the size of the compiled
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* binary.
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*
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* <b>DEVICE_STATE_AS_GPIOR0</b> - ( \ref Group_Device ) \n
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* One of the most frequenty used global variables in the stack is the USB_DeviceState global, which indicates the current state of
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* the Device State Machine. To reduce the amount of code and time required to access and modify this global in an application, this token
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* make be defined to fix the state variable into one of the three general purpose IO registers inside the AVR reserved for application
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* use. When defined, the GPIOR0 register should not be used within the user application except implicitly via the library APIs.
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*
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* <b>HOST_STATE_AS_GPIOR1</b> - ( \ref Group_Host ) \n
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* One of the most frequenty used global variables in the stack is the USB_HostState global, which indicates the current state of
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* the Host State Machine. To reduce the amount of code and time required to access and modify this global in an application, this token
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* make be defined to fix the state variable into one of the three general purpose IO registers inside the AVR reserved for application
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* use. When defined, the GPIOR1 register should not be used within the user application except implicitly via the library APIs.
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*
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* <b>TOTAL_NUM_CONFIGURATIONS</b> - ( \ref Group_Device ) \n
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* By default, the library determines the number of configurations a USB device supports by reading the device descriptor. This reduces
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* the amount of configuration required to set up the library, and allows the value to change dynamically (if descriptors are stored in
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