X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d6edfe35c8a9490407e4a5e34f8e5108c6a260a3..c99f6657a6335b0a70fac9c6278672057e57f525:/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 1691857cd..5cd3aaf61 100644
--- a/LUFA/Drivers/USB/Class/Device/CDC.h
+++ b/LUFA/Drivers/USB/Class/Device/CDC.h
@@ -48,6 +48,7 @@
 		#include "../../USB.h"
 		#include "../Common/CDC.h"
 
+		#include <stdio.h>
 		#include <string.h>
 
 	/* Enable C linkage for C++ Compilers: */
@@ -162,7 +163,8 @@
 			 *
 			 *  \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, 2);
+			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);
 			
 			/** 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.
@@ -209,10 +211,39 @@
 			 */
 			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
+			 *  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.
+			 *
+			 *  Reading data from this stream is non-blocking, i.e. in most instances, complete strings cannot be read in by a single
+			 *  fetch, as the endpoint will not be ready at some point in the transmission, aborting the transfer. However, this may
+			 *  be used when the read data is processed byte-per-bye (via getc()) or when the user application will implement its own
+			 *  line buffering.
+			 *
+			 *  \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
+			 */
+			void CDC_Device_CreateStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream);
+
+			/** 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
+			 */
+			void CDC_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream);
+
 	/* 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);
+				static int CDC_Device_getchar(FILE* Stream);
+				static int CDC_Device_getchar_Blocking(FILE* Stream);
+				
 				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);