X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/864196c884ef3602aee44f1a68aceb5819a07f21..e57e08c67237cf73d28afac7f672ec1e74ec308d:/LUFA/Drivers/USB/Class/Device/HID.h diff --git a/LUFA/Drivers/USB/Class/Device/HID.h b/LUFA/Drivers/USB/Class/Device/HID.h index 87f96c680..a3e3b8584 100644 --- a/LUFA/Drivers/USB/Class/Device/HID.h +++ b/LUFA/Drivers/USB/Class/Device/HID.h @@ -60,6 +60,10 @@ /** Class state structure. An instance of this structure should be made for each HID interface * within the user application, and passed to each of the HID class driver functions as the * HIDInterfaceInfo parameter. This stores each HID interface's configuration and state information. + * + * \note Due to technical limitations, the HID device class driver does not utilize a seperate OUT + * endpoint for host->device communications. Instead, the host->device data (if any) is sent to + * the device via the control endpoint. */ typedef struct { @@ -68,20 +72,26 @@ uint8_t InterfaceNumber; /**< Interface number of the HID interface within the device */ uint8_t ReportINEndpointNumber; /**< Endpoint number of the HID interface's IN report endpoint */ - uint16_t ReportINEndpointSize; /**< Size in bytes of the HID interface's IN report endpoint */ + uint16_t ReportINEndpointSize; /**< Size in bytes of the HID interface's IN report endpoint */ - uint8_t ReportINBufferSize; /**< Size of the largest possible report to send to the host, for - * buffer allocation purposes - */ + void* PrevReportINBuffer; /** Pointer to a buffer where the previously created HID input report can be + * stored by the driver, for comparison purposes to detect report changes that + * must be sent immediately to the host. This should point to a buffer big enough + * to hold the largest HID input report sent from the HID interface. + */ + uint8_t PrevReportINBufferSize; /** Size in bytes of the given input report buffer. This is used to create a + * second buffer of the same size within the driver so that subsequent reports + * can be compared. + */ } Config; /**< Config data for the USB class interface within the device. All elements in this section * must be set or the interface will fail to enumerate and operate correctly. */ struct { bool UsingReportProtocol; /**< Indicates if the HID interface is set to Boot or Report protocol mode */ - uint16_t IdleCount; /**< Report idle period, in ms, set by the host */ - uint16_t IdleMSRemaining; /**< Total number of ms remaining before the idle period elapsed - this should be - * decremented by the user application if non-zero each millisecond */ + uint16_t IdleCount; /**< Report idle period, in mS, set by the host */ + uint16_t IdleMSRemaining; /**< Total number of mS remaining before the idle period elapsed - this should be + * decremented by the user application if non-zero each millisecond */ } State; /**< State data for the USB class interface within the device. All elements in this section * are reset to their defaults when the interface is enumerated. */ @@ -89,44 +99,56 @@ /* Function Prototypes: */ /** Configures the endpoints of a given HID interface, ready for use. This should be linked to the library - * \ref EVENT_USB_ConfigurationChanged() event so that the endpoints are configured when the configuration + * \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration * containing the given HID interface is selected. * * \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class configuration and state. * * \return Boolean true if the endpoints were sucessfully configured, false otherwise */ - bool HID_Device_ConfigureEndpoints(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo); + bool HID_Device_ConfigureEndpoints(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); /** Processes incomming control requests from the host, that are directed to the given HID class interface. This should be - * linked to the library \ref EVENT_USB_UnhandledControlPacket() event. + * linked to the library \ref EVENT_USB_Device_UnhandledControlRequest() event. * * \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class configuration and state. */ - void HID_Device_ProcessControlPacket(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo); + void HID_Device_ProcessControlRequest(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); /** General management task for a given HID class interface, required for the correct operation of the interface. This should * be called frequently in the main program loop, before the master USB management task \ref USB_USBTask(). * * \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class configuration and state. */ - void HID_Device_USBTask(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo); + void HID_Device_USBTask(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); - /** HID class driver callback for the user creation of a HID input report. This callback may fire in response to either + /** Indicates that a millisecond of idle time has elapsed on the given HID interface, and the interface's idle count should be + * decremented. This should be called once per millisecond so that hardware key-repeats function correctly. It is recommended + * that this be called by the \ref EVENT_USB_Device_StartOfFrame() event, once SOF events have been enabled via + * \ref USB_Device_EnableSOFEvents();. + * + * \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class configuration and state. + */ + void HID_Device_MillisecondElapsed(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** HID class driver callback for the user creation of a HID IN report. This callback may fire in response to either * HID class control requests from the host, or by the normal HID endpoint polling procedure. Inside this callback the * user is responsible for the creation of the next HID input report to be sent to the host. * * \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class configuration and state. * \param[in,out] ReportID If preset to a non-zero value, this is the report ID being requested by the host. If zero, this should - * be set to the report ID of the generated HID input report. If multiple reports are not sent via the + * be set to the report ID of the generated HID input report (if any). If multiple reports are not sent via the * given HID interface, this parameter should be ignored. * \param[out] ReportData Pointer to a buffer where the generated HID report should be stored. + * \param[out] ReportSize Number of bytes in the generated input report, or zero if no report is to be sent * - * \return Number of bytes in the generated input report, or zero if no report is to be sent + * \return Boolean true to force the sending of the report even if it is identical to the previous report and still within + * the idle period (useful for devices which report relative movement), false otherwise */ - uint16_t CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo, uint8_t* ReportID, void* ReportData); - - /** HID class driver callback for the user processing of a received HID input report. This callback may fire in response to + bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID, + void* ReportData, uint16_t* ReportSize) ATTR_NON_NULL_PTR_ARG(1, 2, 3, 4); + + /** HID class driver callback for the user processing of a received HID OUT report. This callback may fire in response to * either HID class control requests from the host, or by the normal HID endpoint polling procedure. Inside this callback * the user is responsible for the processing of the received HID output report from the host. * @@ -137,7 +159,7 @@ * \param[in] ReportSize Size in bytes of the received report from the host. */ void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, const uint8_t ReportID, - const void* ReportData, const uint16_t ReportSize); + const void* ReportData, const uint16_t ReportSize) ATTR_NON_NULL_PTR_ARG(1, 3); /* Disable C linkage for C++ Compilers: */ #if defined(__cplusplus)