*
* \section Sec_Dependencies Module Source Dependencies
* The following files must be built with any user project that uses this module:
- * - LUFA/Drivers/USB/Class/Device/CDC.c
+ * - LUFA/Drivers/USB/Class/Device/CDC.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
*
* \section Module Description
* Device Mode USB Class driver framework interface, for the CDC USB Class driver.
* One major issue with CDC-ACM is that it requires two Interface descriptors,
* which will upset most hosts when part of a multi-function "Composite" USB
* device, as each interface will be loaded into a separate driver instance. To
- * conbat this, you should use the "Interface Association Descriptor" addendum to
+ * combat this, you should use the "Interface Association Descriptor" addendum to
* the USB standard which is available on most OSes when creating Composite devices.
*
* Another major oversight is that there is no mechanism for the host to notify the
{
const struct
{
- uint8_t ControlInterfaceNumber; /**< Interface number of the CDC control interface within the device */
+ uint8_t ControlInterfaceNumber; /**< Interface number of the CDC control interface within the device. */
- uint8_t DataINEndpointNumber; /**< Endpoint number of the CDC interface's IN data endpoint */
- uint16_t DataINEndpointSize; /**< Size in bytes of the CDC interface's IN data endpoint */
- bool DataINEndpointDoubleBank; /**< Indicates if the CDC interface's IN data endpoint should use double banking */
+ uint8_t DataINEndpointNumber; /**< Endpoint number of the CDC interface's IN data endpoint. */
+ uint16_t DataINEndpointSize; /**< Size in bytes of the CDC interface's IN data endpoint. */
+ bool DataINEndpointDoubleBank; /**< Indicates if the CDC interface's IN data endpoint should use double banking. */
- uint8_t DataOUTEndpointNumber; /**< Endpoint number of the CDC interface's OUT data endpoint */
- uint16_t DataOUTEndpointSize; /**< Size in bytes of the CDC interface's OUT data endpoint */
- bool DataOUTEndpointDoubleBank; /**< Indicates if the CDC interface's OUT data endpoint should use double banking */
+ uint8_t DataOUTEndpointNumber; /**< Endpoint number of the CDC interface's OUT data endpoint. */
+ uint16_t DataOUTEndpointSize; /**< Size in bytes of the CDC interface's OUT data endpoint. */
+ bool DataOUTEndpointDoubleBank; /**< Indicates if the CDC interface's OUT data endpoint should use double banking. */
- uint8_t NotificationEndpointNumber; /**< Endpoint number of the CDC interface's IN notification endpoint, if used */
- uint16_t NotificationEndpointSize; /**< Size in bytes of the CDC interface's IN notification endpoint, if used */
- bool NotificationEndpointDoubleBank; /**< Indicates if the CDC interface's notification endpoint should use double banking */
+ uint8_t NotificationEndpointNumber; /**< Endpoint number of the CDC interface's IN notification endpoint, if used. */
+ uint16_t NotificationEndpointSize; /**< Size in bytes of the CDC interface's IN notification endpoint, if used. */
+ bool NotificationEndpointDoubleBank; /**< Indicates if the CDC interface's notification endpoint should use double banking. */
} Config; /**< Config data for the USB class interface within the device. All elements in this section
* <b>must</b> be set or the interface will fail to enumerate and operate correctly.
*/
struct
{
- uint32_t BaudRateBPS; /**< Baud rate of the virtual serial port, in bits per second */
+ uint32_t BaudRateBPS; /**< Baud rate of the virtual serial port, in bits per second. */
uint8_t CharFormat; /**< Character format of the virtual serial port, a value from the
- * CDCDevice_CDC_LineCodingFormats_t enum
+ * \ref CDC_LineEncodingFormats_t enum.
*/
uint8_t ParityType; /**< Parity setting of the virtual serial port, a value from the
- * CDCDevice_LineCodingParity_t enum
+ * \ref CDC_LineEncodingParity_t enum.
*/
- uint8_t DataBits; /**< Bits of data per character of the virtual serial port */
+ uint8_t DataBits; /**< Bits of data per character of the virtual serial port. */
} LineEncoding; /** Line encoding used in the virtual serial port, for the device's information. This is generally
* only used if the virtual serial port data is to be reconstructed on a physical UART.
*/
* \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration containing
* the given CDC interface is selected.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
*
- * \return Boolean true if the endpoints were successfully configured, false otherwise
+ * \return Boolean true if the endpoints were successfully configured, false otherwise.
*/
bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Processes incoming control requests from the host, that are directed to the given CDC class interface. This should be
* linked to the library \ref EVENT_USB_Device_UnhandledControlRequest() event.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
*/
void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** General management task for a given CDC 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] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
*/
void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
* user program by declaring a handler function with the same name and parameters listed here. The new line encoding
* settings are available in the LineEncoding structure inside the CDC interface structure passed as a parameter.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
*/
void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
* are available in the ControlLineStates.HostToDevice value inside the CDC interface structure passed as a parameter, set as
* a mask of CDC_CONTROL_LINE_OUT_* masks.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
*/
void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
- /** CDC class driver event for a send break request sent to the device from the host. This is generally used to seperate
+ /** CDC class driver event for a send break request sent to the device from the host. This is generally used to separate
* data or to indicate a special condition to the receiving device.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- * \param[in] Duration Duration of the break that has been sent by the host, in milliseconds
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
+ * \param[in] Duration Duration of the break that has been sent by the host, in milliseconds.
*/
- void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, uint8_t Duration) ATTR_NON_NULL_PTR_ARG(1);
+ void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
+ const uint8_t Duration) ATTR_NON_NULL_PTR_ARG(1);
/** Sends a given string to the attached USB host, if connected. If a host is not connected when the function is called, the
* string is discarded. Bytes will be queued for transmission to the host until either the endpoint bank becomes full, or the
* \pre This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
* the call will fail.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- * \param[in] Data Pointer to the string to send to the host
- * \param[in] Length Size in bytes of the string to send to the host
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
+ * \param[in] Data Pointer to the string to send to the host.
+ * \param[in] Length Size in bytes of the string to send to the host.
*
- * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum
+ * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
*/
- 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) ATTR_NON_NULL_PTR_ARG(2);
+ uint8_t CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
+ const char* const Data,
+ const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
/** Sends a given byte to the attached USB host, if connected. If a host is not connected when the function is called, the
* byte is discarded. Bytes will be queued for transmission to the host until either the endpoint bank becomes full, or the
* \pre This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
* the call will fail.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- * \param[in] Data Byte of data to send to the host
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
+ * \param[in] Data Byte of data to send to the host.
*
- * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum
+ * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum.
*/
- uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
+ uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
+ const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
- /** Determines the number of bytes received by the CDC interface from the host, waiting to be read.
+ /** Determines the number of bytes received by the CDC interface from the host, waiting to be read. This indicates the number
+ * of bytes in the OUT endpoint bank only, and thus the number of calls to \ref CDC_Device_ReceiveByte() which are guaranteed to
+ * succeed immediately. If multiple bytes are to be received, they should be buffered by the user application, as the endpoint
+ * bank will not be released back to the USB controller until all bytes are read.
*
* \pre This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
* the call will fail.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
*
- * \return Total number of buffered bytes received from the host
+ * \return Total number of buffered bytes received from the host.
*/
uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** 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
- * returns 0. The \ref CDC_Device_BytesReceived() function should be queried before data is received to ensure that no data
- * underflow occurs.
+ * returns a negative value. The \ref CDC_Device_BytesReceived() function may be queried in advance to determine how many
+ * bytes are currently buffered in the CDC interface's data receive endpoint bank, and thus how many repeated calls to this
+ * function which are guaranteed to succeed.
*
* \pre This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
* the call will fail.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
*
- * \return Next received byte from the host, or 0 if no data received
+ * \return Next received byte from the host, or a negative value if no data received.
*/
- uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+ int16_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
*
* \pre This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
* the call will fail.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
*
- * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum
+ * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum.
*/
uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
* \pre This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
* the call will fail.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
*/
void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
- /** Creates a standard characer stream for the given CDC Device instance so that it can be used with all the regular
+ /** Creates a standard character stream for the given CDC Device instance so that it can be used with all the regular
* functions in the avr-libc <stdio.h> library that accept a FILE stream as a destination (e.g. fprintf). The created
* stream is bidirectional and can be used for both input and output functions.
*
* \note The created stream can be given as stdout if desired to direct the standard output from all <stdio.h> functions
* to the given CDC interface.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
+ * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed.
*/
- void CDC_Device_CreateStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+ void CDC_Device_CreateStream(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
+ FILE* const Stream) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
/** Identical to CDC_Device_CreateStream(), except that reads are blocking until the calling stream function terminates
* the transfer. While blocking, the USB and CDC service tasks are called repeatedly to maintain USB communications.
*
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
+ * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed.
*/
- void CDC_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+ void CDC_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
+ FILE* const Stream) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
/* Private Interface - For use in library only: */
#if !defined(__DOXYGEN__)
/* Function Prototypes: */
#if defined(__INCLUDE_FROM_CDC_CLASS_DEVICE_C)
- static int CDC_Device_putchar(char c, FILE* Stream) ATTR_NON_NULL_PTR_ARG(2);
+ static int CDC_Device_putchar(char c,
+ FILE* Stream) ATTR_NON_NULL_PTR_ARG(2);
static int CDC_Device_getchar(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1);
static int CDC_Device_getchar_Blocking(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1);
void CDC_Device_Event_Stub(void);
void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
- ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);
+ ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);
void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
- ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);
- void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, uint8_t Duration)
- ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);
+ ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);
+ void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
+ const uint8_t Duration) ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1)
+ ATTR_ALIAS(CDC_Device_Event_Stub);
#endif
#endif
projects / pub / USBasp.git / blobdiff