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