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Add const qualifiers to Host mode Class drivers.
[pub/USBasp.git] / LUFA / Drivers / USB / Class / Device / CDC.h
diff --git a/LUFA/Drivers/USB/Class/Device/CDC.h b/LUFA/Drivers/USB/Class/Device/CDC.h
index bcf8ff7..5905474 100644 (file)
--- a/LUFA/Drivers/USB/Class/Device/CDC.h
+++ b/LUFA/Drivers/USB/Class/Device/CDC.h
@@ -31,6 +31,10 @@
 /** \ingroup Group_USBClassCDC\r
  *  @defgroup Group_USBClassCDCDevice CDC Class Device Mode Driver\r
  *\r
 /** \ingroup Group_USBClassCDC\r
  *  @defgroup Group_USBClassCDCDevice CDC 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/CDC.c\r
+ *\r
  *  \section Module Description\r
  *  Device Mode USB Class driver framework interface, for the CDC USB Class driver.\r
  *\r
  *  \section Module Description\r
  *  Device Mode USB Class driver framework interface, for the CDC USB Class driver.\r
  *\r
@@ -53,100 +57,88 @@
 \r
        /* Public Interface - May be used in end-application: */\r
                /* Type Defines: */\r
 \r
        /* Public Interface - May be used in end-application: */\r
                /* Type Defines: */\r
-                       /** Configuration information structure for \ref USB_ClassInfo_CDC_Device_t CDC device interface structures. */\r
+                       /** Class state structure. An instance of this structure should be made for each CDC interface\r
+                        *  within the user application, and passed to each of the CDC class driver functions as the\r
+                        *  CDCInterfaceInfo parameter. This stores each CDC interface's configuration and state information.\r
+                        */\r
                        typedef struct\r
                        {\r
                        typedef struct\r
                        {\r
-                               uint8_t  ControlInterfaceNumber; /**< Interface number of the CDC control interface within the device */\r
+                               const struct\r
+                               {\r
+                                       uint8_t  ControlInterfaceNumber; /**< Interface number of the CDC control interface within the device */\r
 \r
 \r
-                               uint8_t  DataINEndpointNumber; /**< Endpoint number of the CDC interface's IN data endpoint */\r
-                               uint16_t DataINEndpointSize; /**< Size in bytes of the CDC interface's IN data endpoint */\r
+                                       uint8_t  DataINEndpointNumber; /**< Endpoint number of the CDC interface's IN data endpoint */\r
+                                       uint16_t DataINEndpointSize; /**< Size in bytes of the CDC interface's IN data endpoint */\r
 \r
 \r
-                               uint8_t  DataOUTEndpointNumber; /**< Endpoint number of the CDC interface's OUT data endpoint */\r
-                               uint16_t DataOUTEndpointSize;  /**< Size in bytes of the CDC interface's OUT data endpoint */\r
-\r
-                               uint8_t  NotificationEndpointNumber; /**< Endpoint number of the CDC interface's IN notification endpoint, if used */\r
-                               uint16_t NotificationEndpointSize;  /**< Size in bytes of the CDC interface's IN notification endpoint, if used */\r
-                       } USB_ClassInfo_CDC_Device_Config_t;\r
-                       \r
-                       /** Current State information structure for \ref USB_ClassInfo_CDC_Device_t CDC device interface structures. */\r
-                       typedef struct\r
-                       {\r
-                               struct\r
-                               {\r
-                                       uint8_t HostToDevice; /**< Control line states from the host to device, as a set of CDC_CONTROL_LINE_OUT_*\r
-                                                              *   masks.\r
-                                                              */\r
-                                       uint8_t DeviceToHost; /**< Control line states from the device to host, as a set of CDC_CONTROL_LINE_IN_*\r
-                                                              *   masks.\r
-                                                              */\r
-                               } ControlLineStates;\r
+                                       uint8_t  DataOUTEndpointNumber; /**< Endpoint number of the CDC interface's OUT data endpoint */\r
+                                       uint16_t DataOUTEndpointSize;  /**< Size in bytes of the CDC interface's OUT data endpoint */\r
 \r
 \r
+                                       uint8_t  NotificationEndpointNumber; /**< Endpoint number of the CDC interface's IN notification endpoint, if used */\r
+                                       uint16_t NotificationEndpointSize;  /**< Size in bytes of the CDC interface's IN notification endpoint, if used */\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
                                struct\r
                                {\r
-                                       uint32_t BaudRateBPS; /**< Baud rate of the virtual serial port, in bits per second */\r
-                                       uint8_t  CharFormat; /**< Character format of the virtual serial port, a value from the\r
-                                                                                 *   CDCDevice_CDC_LineCodingFormats_t enum\r
-                                                                                 */\r
-                                       uint8_t  ParityType; /**< Parity setting of the virtual serial port, a value from the\r
-                                                                                 *   CDCDevice_LineCodingParity_t enum\r
-                                                                                 */\r
-                                       uint8_t  DataBits; /**< Bits of data per character of the virtual serial port */\r
-                               } LineEncoding;                 \r
-                       } USB_ClassInfo_CDC_Device_State_t;\r
-               \r
-                       /** Class state structure. An instance of this structure should be made for each CDC interface\r
-                        *  within the user application, and passed to each of the CDC class driver functions as the\r
-                        *  CDCInterfaceInfo parameter. This stores each CDC interface's configuration and state information.\r
-                        */\r
-                       typedef struct\r
-                       {\r
-                               const USB_ClassInfo_CDC_Device_Config_t Config; /**< Config data for the USB class interface within\r
-                                                                                *   the device. All elements in this section\r
-                                                                                *   <b>must</b> be set or the interface will fail\r
-                                                                                *   to enumerate and operate correctly.\r
-                                                                                */\r
-                                                                                                                        \r
-                               USB_ClassInfo_CDC_Device_State_t State; /**< State data for the USB class interface within\r
-                                                                        *   the device. All elements in this section\r
-                                                                        *   <b>may</b> be set to initial values, but may\r
-                                                                        *   also be ignored to default to sane values when\r
-                                                                        *   the interface is enumerated.\r
-                                                                        */\r
+                                       struct\r
+                                       {\r
+                                               uint8_t HostToDevice; /**< Control line states from the host to device, as a set of CDC_CONTROL_LINE_OUT_*\r
+                                                                                          *   masks.\r
+                                                                                          */\r
+                                               uint8_t DeviceToHost; /**< Control line states from the device to host, as a set of CDC_CONTROL_LINE_IN_*\r
+                                                                                          *   masks.\r
+                                                                                          */\r
+                                       } ControlLineStates;\r
+\r
+                                       struct\r
+                                       {\r
+                                               uint32_t BaudRateBPS; /**< Baud rate of the virtual serial port, in bits per second */\r
+                                               uint8_t  CharFormat; /**< Character format of the virtual serial port, a value from the\r
+                                                                                         *   CDCDevice_CDC_LineCodingFormats_t enum\r
+                                                                                         */\r
+                                               uint8_t  ParityType; /**< Parity setting of the virtual serial port, a value from the\r
+                                                                                         *   CDCDevice_LineCodingParity_t enum\r
+                                                                                         */\r
+                                               uint8_t  DataBits; /**< Bits of data per character of the virtual serial port */\r
+                                       } LineEncoding;                 \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_CDC_Device_t;\r
                \r
                /* Function Prototypes: */              \r
                        /** Configures the endpoints of a given CDC interface, ready for use. This should be linked to the library\r
                        } USB_ClassInfo_CDC_Device_t;\r
                \r
                /* Function Prototypes: */              \r
                        /** Configures the endpoints of a given CDC 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 CDC interface is selected.\r
+                        *  \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration containing\r
+                        *  the given CDC interface is selected.\r
                         *\r
                         *\r
-                        *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
                         *\r
                         *  \return Boolean true if the endpoints were sucessfully configured, false otherwise\r
                         */\r
                         *\r
                         *  \return Boolean true if the endpoints were sucessfully configured, false otherwise\r
                         */\r
-                       bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo);\r
+                       bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
 \r
                        /** Processes incomming control requests from the host, that are directed to the given CDC class interface. This should be\r
 \r
                        /** Processes incomming control requests from the host, that are directed to the given CDC 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
                         *\r
-                        *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
                         */\r
                         */\r
-                       void CDC_Device_ProcessControlPacket(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo);\r
+                       void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
 \r
                        /** General management task for a given CDC 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
 \r
                        /** General management task for a given CDC 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 CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
                         */\r
                         */\r
-                       void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo);\r
+                       void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
 \r
                        /** CDC class driver event for a line encoding change on a CDC interface. This event fires each time the host requests a\r
                         *  line encoding change (containing the serial parity, baud and other configuration information) and may be hooked in the\r
                         *  user program by declaring a handler function with the same name and parameters listed here. The new line encoding\r
                         *  settings are available in the LineEncoding structure inside the CDC interface structure passed as a parameter.\r
                         *\r
 \r
                        /** CDC class driver event for a line encoding change on a CDC interface. This event fires each time the host requests a\r
                         *  line encoding change (containing the serial parity, baud and other configuration information) and may be hooked in the\r
                         *  user program by declaring a handler function with the same name and parameters listed here. The new line encoding\r
                         *  settings are available in the LineEncoding structure inside the CDC interface structure passed as a parameter.\r
                         *\r
-                        *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
                         */\r
                         */\r
-                       void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo);\r
+                       void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
                        \r
                        /** CDC class driver event for a control line state change on a CDC interface. This event fires each time the host requests a\r
                         *  control line state change (containing the virtual serial control line states, such as DTR) and may be hooked in the\r
                        \r
                        /** CDC class driver event for a control line state change on a CDC interface. This event fires each time the host requests a\r
                         *  control line state change (containing the virtual serial control line states, such as DTR) and may be hooked in the\r
@@ -154,63 +146,75 @@
                         *  are available in the ControlLineStates.HostToDevice value inside the CDC interface structure passed as a parameter, set as\r
                         *  a mask of CDC_CONTROL_LINE_OUT_* masks.\r
                         *\r
                         *  are available in the ControlLineStates.HostToDevice value inside the CDC interface structure passed as a parameter, set as\r
                         *  a mask of CDC_CONTROL_LINE_OUT_* masks.\r
                         *\r
-                        *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                        */             \r
-                       void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo);\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        */\r
+                       void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
 \r
                        /** Sends a given string to the attached USB host, if connected. If a host is not connected when the function is called, the\r
                         *  string is discarded.\r
                         *\r
 \r
                        /** Sends a given string to the attached USB host, if connected. If a host is not connected when the function is called, the\r
                         *  string is discarded.\r
                         *\r
-                        *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                        *  \param Data  Pointer to the string to send to the host\r
-                        *  \param Length  Size in bytes of the string to send to the host\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        *  \param[in] Data  Pointer to the string to send to the host\r
+                        *  \param[in] Length  Size in bytes of the string to send to the host\r
+                        *\r
+                        *  \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum\r
                         */\r
                         */\r
-                       void CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, char* Data, uint16_t Length);\r
+                       uint8_t CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, char* const Data, const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1, 2);\r
                        \r
                        /** Sends a given byte to the attached USB host, if connected. If a host is not connected when the function is called, the\r
                         *  byte is discarded.\r
                         *\r
                        \r
                        /** Sends a given byte to the attached USB host, if connected. If a host is not connected when the function is called, the\r
                         *  byte is discarded.\r
                         *\r
-                        *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                        *  \param Data  Byte of data to send to the host\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        *  \param[in] Data  Byte of data to send to the host\r
+                        *\r
+                        *  \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum\r
                         */\r
                         */\r
-                       void CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, uint8_t Data);\r
+                       uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);\r
                        \r
                        /** Determines the number of bytes received by the CDC interface from the host, waiting to be read.\r
                         *\r
                        \r
                        /** Determines the number of bytes received by the CDC interface from the host, waiting to be read.\r
                         *\r
-                        *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
                         *\r
                         *  \return Total number of buffered bytes received from the host\r
                         */\r
                         *\r
                         *  \return Total number of buffered bytes received from the host\r
                         */\r
-                       uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo);\r
+                       uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
                        \r
                        /** Reads a byte of data from the host. If no data is waiting to be read of if a USB host is not connected, the function\r
                        \r
                        /** Reads a byte of data from the host. If no data is waiting to be read of if a USB host is not connected, the function\r
-                        *  returns 0. The USB_CDC_BytesReceived() function should be queried before data is recieved to ensure that no data\r
+                        *  returns 0. The \ref CDC_Device_BytesReceived() function should be queried before data is received to ensure that no data\r
                         *  underflow occurs.\r
                         *\r
                         *  underflow occurs.\r
                         *\r
-                        *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
                         *\r
                         *  \return Next received byte from the host, or 0 if no data received\r
                         */\r
                         *\r
                         *  \return Next received byte from the host, or 0 if no data received\r
                         */\r
-                       uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo);\r
+                       uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
+                       \r
+                       /** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.\r
+                        *\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        *\r
+                        *  \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum\r
+                        */\r
+                       uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
                        \r
                        /** Sends a Serial Control Line State Change notification to the host. This should be called when the virtual serial\r
                         *  control lines (DCD, DSR, etc.) have changed states, or to give BREAK notfications to the host. Line states persist\r
                         *  until they are cleared via a second notification. This should be called each time the CDC class driver's \r
                         *  ControlLineStates.DeviceToHost value is updated to push the new states to the USB host.\r
                         *\r
                        \r
                        /** Sends a Serial Control Line State Change notification to the host. This should be called when the virtual serial\r
                         *  control lines (DCD, DSR, etc.) have changed states, or to give BREAK notfications to the host. Line states persist\r
                         *  until they are cleared via a second notification. This should be called each time the CDC class driver's \r
                         *  ControlLineStates.DeviceToHost value is updated to push the new states to the USB host.\r
                         *\r
-                        *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
                         */\r
                         */\r
-                       void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo);\r
+                       void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
 \r
        /* Private Interface - For use in library only: */\r
        #if !defined(__DOXYGEN__)\r
                /* Function Prototypes: */\r
                        #if defined(INCLUDE_FROM_CDC_CLASS_DEVICE_C)\r
                                void CDC_Device_Event_Stub(void);\r
 \r
        /* Private Interface - For use in library only: */\r
        #if !defined(__DOXYGEN__)\r
                /* Function Prototypes: */\r
                        #if defined(INCLUDE_FROM_CDC_CLASS_DEVICE_C)\r
                                void CDC_Device_Event_Stub(void);\r
-                               void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)\r
-                                                                                                                 ATTR_WEAK ATTR_ALIAS(CDC_Device_Event_Stub);\r
-                               void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)\r
-                                                                                                                        ATTR_WEAK ATTR_ALIAS(CDC_Device_Event_Stub);\r
+                               void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)\r
+                                                                                                                 ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);\r
+                               void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)\r
+                                                                                                                        ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);\r
                        #endif\r
 \r
        #endif\r
                        #endif\r
 \r
        #endif\r
USB isp AVR programmer