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200 lines
17 KiB
200 lines
17 KiB
/** \file |
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* |
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* This file contains special DoxyGen information for the generation of the main page and other special |
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* documentation pages. It is not a project source file. |
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*/ |
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/** \page Page_TokenSummary Summary of Compile Tokens |
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* |
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* The following lists all the possible tokens which can be defined in a project makefile, and passed to the |
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* compiler via the -D switch, to alter the LUFA library code. These tokens may alter the library behaviour, |
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* or remove features unused by a given application in order to save flash space. |
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* |
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* |
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* \section Sec_SummaryNonUSBTokens Non USB Related Tokens |
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* This section describes compile tokens which affect non-USB sections of the LUFA library. |
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* |
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* <b>DISABLE_TERMINAL_CODES</b> - ( \ref Group_Terminal ) \n |
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* If an application contains ANSI terminal control codes listed in TerminalCodes.h, it might be desired to remove them |
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* at compile time for use with a terminal which is non-ANSI control code aware, without modifying the source code. If |
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* this token is defined, all ANSI control codes in the application code from the TerminalCodes.h header are removed from |
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* the source code at compile time. |
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* |
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* |
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* \section Sec_SummaryUSBClassTokens USB Class Driver Related Tokens |
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* This section describes compile tokens which affect USB class-specific drivers in the LUFA library. |
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* |
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* <b>HID_HOST_BOOT_PROTOCOL_ONLY</b> - ( \ref Group_USBClassHIDHost ) \n |
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* By default, the USB HID Host class driver is designed to work with HID devices using either the Boot or Report HID |
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* communication protocols. On devices where the Report protocol is not used (i.e. in applications where only basic |
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* Mouse or Keyboard operation is desired, using boot compatible devices), the code responsible for the Report protocol |
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* mode can be removed to save space in the compiled application by defining this token. When defined, it is still necessary |
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* to explicitly put the attached device into Boot protocol mode via a call to \ref HID_Host_SetBootProtocol(). |
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* |
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* <b>HID_STATETABLE_STACK_DEPTH</b>=<i>x</i> - ( \ref Group_HIDParser ) \n |
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* HID reports may contain PUSH and POP elements, to store and retrieve the current HID state table onto a stack. This |
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* allows for reports to save the state table before modifying it slightly for a data item, and then restore the previous |
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* state table in a compact manner. This token may be defined to a non-zero 8-bit value to give the maximum depth of the state |
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* table stack. If not defined, this defaults to the value indicated in the HID.h file documentation. |
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* |
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* <b>HID_USAGE_STACK_DEPTH</b>=<i>x</i> - ( \ref Group_HIDParser ) \n |
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* HID reports generally contain many USAGE elements, which are assigned to INPUT, OUTPUT and FEATURE items in succession |
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* when multiple items are defined at once (via REPORT COUNT elements). This allows for several items to be defined with |
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* different usages in a compact manner. This token may be defined to a non-zero 8-bit value to set the maximum depth of the |
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* usage stack, indicating the maximum number of USAGE items which can be stored temporarily until the next INPUT, OUTPUT |
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* and FEATURE item. If not defined, this defaults to the value indicated in the HID.h file documentation. |
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* |
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* <b>HID_MAX_COLLECTIONS</b>=<i>x</i> - ( \ref Group_HIDParser ) \n |
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* HID reports generally contain several COLLECTION elements, used to group related data items together. Collection information |
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* is stored separately in the processed usage structure (and referred to by the data elements in the structure) to save space. |
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* This token may be defined to a non-zero 8-bit value to set the maximum number of COLLECTION items which can be processed by the |
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* parser into the resultant processed report structure. If not defined, this defaults to the value indicated in the HID.h file |
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* documentation. |
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* |
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* <b>HID_MAX_REPORTITEMS</b>=<i>x</i> - ( \ref Group_HIDParser ) \n |
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* All HID reports contain one or more INPUT, OUTPUT and/or FEATURE items describing the data which can be sent to and from the HID |
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* device. Each item has associated usages, bit offsets in the item reports and other associated data indicating the manner in which |
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* the report data should be interpreted by the host. This token may be defined to a non-zero 8-bit value to set the maximum number of |
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* data elements which can be stored in the processed HID report structure, including INPUT, OUTPUT and (if enabled) FEATURE items. |
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* If a item has a multiple count (i.e. a REPORT COUNT of more than 1), each item in the report count is placed separately in the |
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* processed HID report table. If not defined, this defaults to the value indicated in the HID.h file documentation. |
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* |
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* <b>HID_MAX_REPORT_IDS</b>=<i>x</i> - ( \ref Group_HIDParser ) \n |
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* HID reports may contain several report IDs, to logically distinguish grouped device data from one another - for example, a combination |
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* keyboard and mouse might use report IDs to separate the keyboard reports from the mouse reports. In order to determine the size of each |
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* report, and thus know how many bytes must be read or written, the size of each report (IN, OUT and FEATURE) must be calculated and |
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* stored. This token may be defined to a non-zero 8-bit value to set the maximum number of report IDs in a device which can be processed |
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* and their sizes calculated/stored into the resultant processed report structure. If not defined, this defaults to the value indicated in |
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* the HID.h file documentation. |
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* |
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* |
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* \section Sec_SummaryUSBTokens General USB Driver Related Tokens |
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* This section describes compile tokens which affect USB driver stack as a whole in the LUFA library. |
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* |
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* <b>NO_STREAM_CALLBACKS</b> - ( \ref Group_EndpointPacketManagement , \ref Group_PipePacketManagement )\n |
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* Both the endpoint and the pipe driver code contains stream functions, allowing for arrays of data to be sent to or from the |
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* host easily via a single function call (rather than complex routines worrying about sending full packets, waiting for the endpoint/ |
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* pipe to become ready, etc.). By default, these stream functions require a callback function which is executed after each byte processed, |
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* allowing for early-aborts of stream transfers by the application. If callbacks are not required in an application, they can be removed |
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* by defining this token, reducing the compiled binary size. When removed, the stream functions no longer accept a callback function as |
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* a parameter. |
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* |
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* <b>FAST_STREAM_TRANSFERS</b> - ( \ref Group_EndpointPacketManagement , \ref Group_PipePacketManagement )\n |
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* By default, streams are transferred internally via a loop, sending or receiving one byte per iteration before checking for a bank full |
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* or empty condition. This allows for multiple stream functions to be chained together easily, as there are no alignment issues. However, |
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* this can lead to heavy performance penalties in applications where large streams are used frequently. When this compile time option is |
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* used, bytes are sent or received in groups of 8 bytes at a time increasing performance at the expense of a larger flash memory consumption |
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* due to the extra code required to deal with byte alignment. |
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* |
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* <b>USE_STATIC_OPTIONS</b>=<i>x</i> - ( \ref Group_USBManagement ) \n |
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* By default, the USB_Init() function accepts dynamic options at runtime to alter the library behaviour, including whether the USB pad |
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* voltage regulator is enabled, and the device speed when in device mode. By defining this token to a mask comprised of the USB options |
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* mask defines usually passed as the Options parameter to USB_Init(), the resulting compiled binary can be decreased in size by removing |
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* the dynamic options code, and replacing it with the statically set options. When defined, the USB_Init() function no longer accepts an |
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* Options parameter. |
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* |
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* <b>USB_DEVICE_ONLY</b> - ( \ref Group_USBManagement ) \n |
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* For the USB AVR models supporting both device and host USB modes, the USB_Init() function contains a Mode parameter which specifies the |
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* mode the library should be initialized to. If only device mode is required, the code for USB host mode can be removed from the binary to |
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* save space. When defined, the USB_Init() function no longer accepts a Mode parameter. This define is irrelevant on smaller USB AVRs which |
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* do not support host mode. |
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* |
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* <b>USB_HOST_ONLY</b> - ( \ref Group_USBManagement ) \n |
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* Same as USB_DEVICE_ONLY, except the library is fixed to USB host mode rather than USB device mode. Not available on some USB AVR models. |
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* |
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* <b>USB_STREAM_TIMEOUT_MS</b>=<i>x</i> - ( \ref Group_USBManagement ) \n |
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* When endpoint and/or pipe stream functions are used, by default there is a timeout between each transfer which the connected device or host |
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* must satisfy, or the stream function aborts the remaining data transfer. This token may be defined to a non-zero 16-bit value to set the timeout |
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* period for stream transfers, specified in milliseconds. If not defined, the default value specified in LowLevel.h is used instead. |
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* |
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* <b>NO_LIMITED_CONTROLLER_CONNECT</b> - ( \ref Group_Events ) \n |
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* On the smaller USB AVRs, the USB controller lacks VBUS events to determine the physical connection state of the USB bus to a host. In lieu of |
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* VBUS events, the library attempts to determine the connection state via the bus suspension and wake up events instead. This however may be |
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* slightly inaccurate due to the possibility of the host suspending the bus while the device is still connected. If accurate connection status is |
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* required, the VBUS line of the USB connector should be routed to an AVR pin to detect its level, so that the USB_DeviceState global |
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* can be accurately set and the \ref EVENT_USB_Device_Connect() and \ref EVENT_USB_Device_Disconnect() events manually raised by the RAISE_EVENT macro. |
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* When defined, this token disables the library's auto-detection of the connection state by the aforementioned suspension and wake up events. |
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* |
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* |
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* \section Sec_SummaryUSBDeviceTokens USB Device Mode Driver Related Tokens |
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* This section describes compile tokens which affect USB driver stack of the LUFA library when used in Device mode. |
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* |
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* <b>USE_RAM_DESCRIPTORS</b> - ( \ref Group_Descriptors ) \n |
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* Define this token to indicate to the USB driver that all device descriptors are stored in RAM, rather than being located in any one |
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* of the AVR's memory spaces. RAM descriptors may be desirable in applications where the descriptors need to be modified at runtime. |
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* |
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* <b>USE_FLASH_DESCRIPTORS</b> - ( \ref Group_Descriptors ) \n |
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* Similar to USE_RAM_DESCRIPTORS, but all descriptors are stored in the AVR's FLASH memory rather than RAM. |
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* |
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* <b>USE_EEPROM_DESCRIPTORS</b> - ( \ref Group_Descriptors ) \n |
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* Similar to USE_RAM_DESCRIPTORS, but all descriptors are stored in the AVR's EEPROM memory rather than RAM. |
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* |
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* <b>NO_INTERNAL_SERIAL</b> - ( \ref Group_Descriptors ) \n |
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* Some AVR models contain a unique 20-digit serial number which can be used as the device serial number, while in device mode. This |
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* allows the host to uniquely identify the device regardless of if it is moved between USB ports on the same computer, allowing |
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* allocated resources (such as drivers, COM Port number allocations) to be preserved. This is not needed in many apps, and so the |
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* code that performs this task can be disabled by defining this option and passing it to the compiler via the -D switch. |
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* |
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* <b>FIXED_CONTROL_ENDPOINT_SIZE</b>=<i>x</i> - ( \ref Group_EndpointManagement ) \n |
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* By default, the library determines the size of the control endpoint (when in device mode) by reading the device descriptor. |
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* Normally this reduces the amount of configuration required for the library, allows the value to change dynamically (if |
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* descriptors are stored in EEPROM or RAM rather than flash memory) and reduces code maintenance. However, this token can be |
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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_GPIOR</b> - ( \ref Group_Device ) \n |
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* One of the most frequently 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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* may be defined to a value between 0 and 2 to fix the state variable into one of the three general purpose IO registers inside the AVR |
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* reserved for application use. When defined, the corresponding GPIOR register should not be used within the user application except |
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* implicitly via the library APIs. |
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* |
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* <b>FIXED_NUM_CONFIGURATIONS</b>=<i>x</i> - ( \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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* EEPROM or RAM rather than flash memory) and reduces code maintenance. However, this value may be fixed via this token in the project |
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* makefile to reduce the compiled size of the binary at the expense of flexibility. |
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* |
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* <b>CONTROL_ONLY_DEVICE</b> \n |
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* In some limited USB device applications, there are no device endpoints other than the control endpoint; i.e. all device communication |
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* is through control endpoint requests. Defining this token will remove several features related to the selection and control of device |
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* endpoints internally, saving space. Generally, this is usually only useful in (some) bootloaders and is best avoided. |
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* |
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* <b>INTERRUPT_CONTROL_ENDPOINT</b> - ( \ref Group_USBManagement ) \n |
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* Some applications prefer to not call the USB_USBTask() management task regularly while in device mode, as it can complicate code significantly. |
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* Instead, when device mode is used this token can be passed to the library via the -D switch to allow the library to manage the USB control |
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* endpoint entirely via USB controller interrupts asynchronously to the user application. When defined, USB_USBTask() does not need to be called |
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* when in USB device mode. |
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* |
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* <b>NO_DEVICE_REMOTE_WAKEUP</b> - (\ref Group_Device ) \n |
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* Many devices do not require the use of the Remote Wakeup features of USB, used to wake up the USB host when suspended. On these devices, |
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* the code required to manage device Remote Wakeup can be disabled by defining this token and passing it to the library via the -D switch. |
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* |
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* <b>NO_DEVICE_SELF_POWER</b> - (\ref Group_Device ) \n |
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* USB devices may be bus powered, self powered, or a combination of both. When a device can be both bus powered and self powered, the host may |
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* query the device to determine the current power source, via \ref USB_CurrentlySelfPowered. For solely bus powered devices, this global and the |
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* code required to manage it may be disabled by passing this token to the library via the -D switch. |
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* |
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* |
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* \section Sec_SummaryUSBHostTokens USB Host Mode Driver Related Tokens |
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* |
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* This section describes compile tokens which affect USB driver stack of the LUFA library when used in Host mode. |
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* |
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* <b>HOST_STATE_AS_GPIOR</b> - ( \ref Group_Host ) \n |
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* One of the most frequently 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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* may be defined to a value between 0 and 2 to fix the state variable into one of the three general purpose IO registers inside the AVR |
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* reserved for application use. When defined, the corresponding GPIOR register should not be used within the user application except |
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* implicitly via the library APIs. |
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* |
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* <b>USB_HOST_TIMEOUT_MS</b>=<i>x</i> - ( \ref Group_Host ) \n |
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* When a control transfer is initiated in host mode to an attached device, a timeout is used to abort the transfer if the attached |
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* device fails to respond within the timeout period. This token may be defined to a non-zero 16-bit value to set the timeout period for |
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* control transfers, specified in milliseconds. If not defined, the default value specified in Host.h is used instead. |
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* |
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* <b>HOST_DEVICE_SETTLE_DELAY_MS</b>=<i>x</i> - ( \ref Group_Host ) \n |
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* Some devices require a delay of up to 5 seconds after they are connected to VBUS before the enumeration process can be started, or |
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* they will fail to enumerate correctly. By placing a delay before the enumeration process, it can be ensured that the bus has settled |
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* back to a known idle state before communications occur with the device. This token may be defined to a 16-bit value to set the device |
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* settle period, specified in milliseconds. If not defined, the default value specified in Host.h is used instead. |
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*/
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