/** \ingroup Group_USBClassAudio\r
* @defgroup Group_USBClassAudioDevice Audio Class Device Mode Driver\r
*\r
+ * \section Sec_Dependencies Module Source Dependencies\r
+ * The following files must be built with any user project that uses this module:\r
+ * - LUFA/Drivers/USB/Class/Device/Audio.c\r
+ *\r
* \section Module Description\r
* Device Mode USB Class driver framework interface, for the Audio USB Class driver.\r
*\r
extern "C" {\r
#endif\r
\r
- /* Function Prototypes: */\r
- /** Configures the endpoints of a given Audio 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 containing the\r
- * given Audio interface is selected.\r
- *\r
- * \param AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.\r
- *\r
- * \return Boolean true if the endpoints were sucessfully configured, false otherwise\r
- */\r
- bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_t* AudioInterfaceInfo);\r
-\r
- /** Processes incomming control requests from the host, that are directed to the given Audio class interface. This should be\r
- * linked to the library \ref EVENT_USB_UnhandledControlPacket() event.\r
- *\r
- * \param AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.\r
- */\r
- void Audio_Device_ProcessControlPacket(USB_ClassInfo_Audio_t* AudioInterfaceInfo);\r
-\r
- /** General management task for a given Audio 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 AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.\r
- */\r
- void Audio_Device_USBTask(USB_ClassInfo_Audio_t* AudioInterfaceInfo);\r
+ /* Public Interface - May be used in end-application: */\r
+ /* Type Defines: */ \r
+ /** Class state structure. An instance of this structure should be made for each Audio interface\r
+ * within the user application, and passed to each of the Audio class driver functions as the\r
+ * AudioInterfaceInfo parameter. This stores each Audio interface's configuration and state information.\r
+ */\r
+ typedef struct\r
+ {\r
+ const struct\r
+ {\r
+ uint8_t StreamingInterfaceNumber; /**< Index of the Audio Streaming interface within the device this\r
+ * structure controls\r
+ */\r
+\r
+ uint8_t DataINEndpointNumber; /**< Endpoint number of the incoming Audio Streaming data, if available\r
+ * (zero if unused)\r
+ */\r
+ uint16_t DataINEndpointSize; /**< Size in bytes of the incoming Audio Streaming data endpoint, if available\r
+ * (zero if unused)\r
+ */\r
+\r
+ uint8_t DataOUTEndpointNumber; /**< Endpoint number of the outgoing Audio Streaming data, if available\r
+ * (zero if unused)\r
+ */\r
+ uint16_t DataOUTEndpointSize; /**< Size in bytes of the outgoing Audio Streaming data endpoint, if available\r
+ * (zero if unused)\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 InterfaceEnabled; /**< Set and cleared by the class driver to indicate if the host has enabled the streaming endpoints\r
+ * of the Audio Streaming interface.\r
+ */\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
+ } USB_ClassInfo_Audio_Device_t;\r
\r
- /** Reads the next 8-bit audio sample from the current audio interface.\r
- *\r
- * \note This should be preceeded immediately by a call to the USB_Audio_IsSampleReceived() function to ensure that\r
- * the correct endpoint is selected and ready for data.\r
- *\r
- * \return Signed 8-bit audio sample from the audio interface\r
- */\r
- int8_t Audio_Device_ReadSample8(void);\r
-\r
- /** Reads the next 16-bit audio sample from the current audio interface.\r
- *\r
- * \note This should be preceeded immediately by a call to the USB_Audio_IsSampleReceived() function to ensure that\r
- * the correct endpoint is selected and ready for data.\r
- *\r
- * \return Signed 16-bit audio sample from the audio interface\r
- */\r
- int16_t Audio_Device_ReadSample16(void);\r
-\r
- /** Reads the next 24-bit audio sample from the current audio interface.\r
- *\r
- * \note This should be preceeded immediately by a call to the USB_Audio_IsSampleReceived() function to ensure that\r
- * the correct endpoint is selected and ready for data.\r
- *\r
- * \return Signed 24-bit audio sample from the audio interface\r
- */\r
- int32_t Audio_Device_ReadSample24(void);\r
-\r
- /** Writes the next 8-bit audio sample to the current audio interface.\r
- *\r
- * \note This should be preceeded immediately by a call to the USB_Audio_IsReadyForNextSample() function to ensure that\r
- * the correct endpoint is selected and ready for data.\r
- *\r
- * \param Sample Signed 8-bit audio sample\r
- */\r
- void Audio_Device_WriteSample8(int8_t Sample);\r
-\r
- /** Writes the next 16-bit audio sample to the current audio interface.\r
- *\r
- * \note This should be preceeded immediately by a call to the USB_Audio_IsReadyForNextSample() function to ensure that\r
- * the correct endpoint is selected and ready for data.\r
- *\r
- * \param Sample Signed 16-bit audio sample\r
- */\r
- void Audio_Device_WriteSample16(int16_t Sample);\r
-\r
- /** Writes the next 24-bit audio sample to the current audio interface.\r
- *\r
- * \note This should be preceeded immediately by a call to the USB_Audio_IsReadyForNextSample() function to ensure that\r
- * the correct endpoint is selected and ready for data.\r
- *\r
- * \param Sample Signed 24-bit audio sample\r
- */\r
- void Audio_Device_WriteSample24(int32_t Sample);\r
-\r
- /** Determines if the given audio interface is ready for a sample to be read from it.\r
- *\r
- * \param AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.\r
- *\r
- * \return Boolean true if the given Audio interface has a sample to be read, false otherwise\r
- */\r
- bool Audio_Device_IsSampleReceived(USB_ClassInfo_Audio_t* AudioInterfaceInfo);\r
-\r
- /** Determines if the given audio interface is ready to accept the next sample to be written to it.\r
- *\r
- * \param AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state.\r
- *\r
- * \return Boolean true if the given Audio interface is ready to accept the next sample, false otherwise\r
- */\r
- bool Audio_Device_IsReadyForNextSample(USB_ClassInfo_Audio_t* AudioInterfaceInfo);\r
+ /* Function Prototypes: */\r
+ /** Configures the endpoints of a given Audio interface, ready for use. This should be linked to the library\r
+ * \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration containing the\r
+ * given Audio interface is selected.\r
+ *\r
+ * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ *\r
+ * \return Boolean true if the endpoints were successfully configured, false otherwise\r
+ */\r
+ bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
+\r
+ /** Processes incoming control requests from the host, that are directed to the given Audio class interface. This should be\r
+ * linked to the library \ref EVENT_USB_Device_UnhandledControlRequest() event.\r
+ *\r
+ * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ */\r
+ void Audio_Device_ProcessControlRequest(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
+\r
+ /** General management task for a given Audio 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] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ */\r
+ void Audio_Device_USBTask(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
+ \r
+ /** Determines if the given audio interface is ready for a sample to be read from it, and selects the streaming\r
+ * OUT endpoint ready for reading.\r
+ *\r
+ * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ *\r
+ * \return Boolean true if the given Audio interface has a sample to be read, false otherwise\r
+ */\r
+ bool Audio_Device_IsSampleReceived(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo);\r
+\r
+ /** Determines if the given audio interface is ready to accept the next sample to be written to it, and selects\r
+ * the streaming IN endpoint ready for writing.\r
+ *\r
+ * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ *\r
+ * \return Boolean true if the given Audio interface is ready to accept the next sample, false otherwise\r
+ */\r
+ bool Audio_Device_IsReadyForNextSample(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo);\r
+\r
+ /* Inline Functions: */\r
+ /** Reads the next 8-bit audio sample from the current audio interface.\r
+ *\r
+ * \note This should be preceded immediately by a call to the USB_Audio_IsSampleReceived() function to ensure that\r
+ * the correct endpoint is selected and ready for data.\r
+ *\r
+ * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ *\r
+ * \return Signed 8-bit audio sample from the audio interface\r
+ */\r
+ static inline int8_t Audio_Device_ReadSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) ATTR_ALWAYS_INLINE;\r
+ static inline int8_t Audio_Device_ReadSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)\r
+ {\r
+ int8_t Sample;\r
+ \r
+ (void)AudioInterfaceInfo;\r
+\r
+ Sample = Endpoint_Read_Byte();\r
+\r
+ if (!(Endpoint_BytesInEndpoint()))\r
+ Endpoint_ClearOUT();\r
+ \r
+ return Sample;\r
+ }\r
+\r
+ /** Reads the next 16-bit audio sample from the current audio interface.\r
+ *\r
+ * \note This should be preceded immediately by a call to the USB_Audio_IsSampleReceived() function to ensure that\r
+ * the correct endpoint is selected and ready for data.\r
+ *\r
+ * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ *\r
+ * \return Signed 16-bit audio sample from the audio interface\r
+ */\r
+ static inline int16_t Audio_Device_ReadSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) ATTR_ALWAYS_INLINE;\r
+ static inline int16_t Audio_Device_ReadSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)\r
+ {\r
+ int16_t Sample;\r
+\r
+ (void)AudioInterfaceInfo;\r
+\r
+ Sample = (int16_t)Endpoint_Read_Word_LE();\r
+ \r
+ if (!(Endpoint_BytesInEndpoint()))\r
+ Endpoint_ClearOUT();\r
+\r
+ return Sample;\r
+ }\r
+\r
+ /** Reads the next 24-bit audio sample from the current audio interface.\r
+ *\r
+ * \note This should be preceded immediately by a call to the USB_Audio_IsSampleReceived() function to ensure that\r
+ * the correct endpoint is selected and ready for data.\r
+ *\r
+ * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ * \return Signed 24-bit audio sample from the audio interface\r
+ */\r
+ static inline int32_t Audio_Device_ReadSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo) ATTR_ALWAYS_INLINE;\r
+ static inline int32_t Audio_Device_ReadSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)\r
+ {\r
+ int32_t Sample;\r
+\r
+ (void)AudioInterfaceInfo;\r
+\r
+ Sample = (((uint32_t)Endpoint_Read_Byte() << 16) | Endpoint_Read_Word_LE());\r
+ \r
+ if (!(Endpoint_BytesInEndpoint()))\r
+ Endpoint_ClearOUT();\r
+\r
+ return Sample;\r
+ }\r
+\r
+ /** Writes the next 8-bit audio sample to the current audio interface.\r
+ *\r
+ * \note This should be preceded immediately by a call to the USB_Audio_IsReadyForNextSample() function to ensure that\r
+ * the correct endpoint is selected and ready for data.\r
+ *\r
+ * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ * \param[in] Sample Signed 8-bit audio sample\r
+ */\r
+ static inline void Audio_Device_WriteSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,\r
+ const int8_t Sample) ATTR_ALWAYS_INLINE;\r
+ static inline void Audio_Device_WriteSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,\r
+ const int8_t Sample)\r
+ {\r
+ Endpoint_Write_Byte(Sample);\r
+\r
+ if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize)\r
+ Endpoint_ClearIN();\r
+ }\r
+\r
+ /** Writes the next 16-bit audio sample to the current audio interface.\r
+ *\r
+ * \note This should be preceded immediately by a call to the USB_Audio_IsReadyForNextSample() function to ensure that\r
+ * the correct endpoint is selected and ready for data.\r
+ *\r
+ * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ * \param[in] Sample Signed 16-bit audio sample\r
+ */\r
+ static inline void Audio_Device_WriteSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,\r
+ const int16_t Sample) ATTR_ALWAYS_INLINE;\r
+ static inline void Audio_Device_WriteSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,\r
+ const int16_t Sample)\r
+ {\r
+ Endpoint_Write_Word_LE(Sample);\r
+\r
+ if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize)\r
+ Endpoint_ClearIN();\r
+ }\r
+\r
+ /** Writes the next 24-bit audio sample to the current audio interface.\r
+ *\r
+ * \note This should be preceded immediately by a call to the USB_Audio_IsReadyForNextSample() function to ensure that\r
+ * the correct endpoint is selected and ready for data.\r
+ *\r
+ * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state\r
+ * \param[in] Sample Signed 24-bit audio sample\r
+ */\r
+ static inline void Audio_Device_WriteSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,\r
+ const int32_t Sample) ATTR_ALWAYS_INLINE;\r
+ static inline void Audio_Device_WriteSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,\r
+ const int32_t Sample)\r
+ {\r
+ Endpoint_Write_Byte(Sample >> 16);\r
+ Endpoint_Write_Word_LE(Sample);\r
+\r
+ if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize)\r
+ Endpoint_ClearIN();\r
+ }\r
\r
/* Disable C linkage for C++ Compilers: */\r
#if defined(__cplusplus)\r
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