*
* \section Sec_Dependencies Module Source Dependencies
* The following files must be built with any user project that uses this module:
- * - LUFA/Drivers/USB/Class/Host/CDC.c
+ * - LUFA/Drivers/USB/Class/Host/CDC.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
*
* \section Module Description
* Host Mode USB Class driver framework interface, for the CDC USB Class driver.
*
* \return A value from the \ref CDCHost_EnumerationFailure_ErrorCodes_t enum.
*/
- uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, uint16_t ConfigDescriptorSize,
+ uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+ uint16_t ConfigDescriptorSize,
void* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
/** Sets the line encoding for the attached device's virtual serial port. This should be called when the LineEncoding
*
* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum.
*/
- uint8_t CDC_Host_SendBreak(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, const uint8_t Duration) ATTR_NON_NULL_PTR_ARG(1);
+ uint8_t CDC_Host_SendBreak(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+ const uint8_t Duration) ATTR_NON_NULL_PTR_ARG(1);
/** Sends a given string to the attached USB device, if connected. If a device is not connected when the function is called, the
* string is discarded. Bytes will be queued for transmission to the device until either the pipe bank becomes full, or the
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
- uint8_t CDC_Host_SendString(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, char* Data, const uint16_t Length)
- ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+ uint8_t CDC_Host_SendString(USB_ClassInfo_CDC_Host_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 device, if connected. If a device is not connected when the function is called, the
* byte is discarded. Bytes will be queued for transmission to the device until either the pipe bank becomes full, or the
*
* \return A value from the \ref Pipe_WaitUntilReady_ErrorCodes_t enum.
*/
- uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
+ uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_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 device, waiting to be read.
+ /** Determines the number of bytes received by the CDC interface from the device, waiting to be read. This indicates the number
+ * of bytes in the IN pipe bank only, and thus the number of calls to \ref CDC_Host_ReceiveByte() which are guaranteed to succeed
+ * immediately. If multiple bytes are to be received, they should be buffered by the user application, as the pipe bank will not be
+ * released back to the USB controller until all bytes are read.
*
* \pre This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
* call will fail.
uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Reads a byte of data from the device. If no data is waiting to be read of if a USB device is not connected, the function
- * returns 0. The \ref CDC_Host_BytesReceived() function should be queried before data is received to ensure that no data
- * underflow occurs.
+ * returns a negative value. The \ref CDC_Host_BytesReceived() function may be queried in advance to determine how many bytes
+ * are currently buffered in the CDC interface's data receive pipe.
*
* \pre This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
* call will fail.
*
* \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
*
- * \return Next received byte from the device, or 0 if no data received.
+ * \return Next received byte from the device, or a negative value if no data received.
*/
- uint8_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+ int16_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
*
* \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_Host_CreateStream(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo, FILE* Stream);
+ void CDC_Host_CreateStream(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+ FILE* const Stream);
/** Identical to CDC_Host_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.
*/
- void CDC_Host_CreateBlockingStream(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo, FILE* Stream);
+ void CDC_Host_CreateBlockingStream(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+ FILE* const Stream);
/** CDC class driver event for a control line state change on a CDC host interface. This event fires each time the device notifies
* the host of a control line state change (containing the virtual serial control line states, such as DCD) and may be hooked in the
/* Function Prototypes: */
#if defined(__INCLUDE_FROM_CDC_CLASS_HOST_C)
- static int CDC_Host_putchar(char c, FILE* Stream) ATTR_NON_NULL_PTR_ARG(2);
+ static int CDC_Host_putchar(char c,
+ FILE* Stream) ATTR_NON_NULL_PTR_ARG(2);
static int CDC_Host_getchar(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1);
static int CDC_Host_getchar_Blocking(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1);
static uint8_t DCOMP_CDC_Host_NextCDCControlInterface(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
static uint8_t DCOMP_CDC_Host_NextCDCDataInterface(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
static uint8_t DCOMP_CDC_Host_NextCDCInterfaceEndpoint(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
- #endif
+ #endif
#endif
/* Disable C linkage for C++ Compilers: */
projects / pub / USBasp.git / blobdiff