Added new stream creation function to the CDC Class drivers, to easily make standard streams from CDC Class driver instances.

2 files changed, 13 insertions, 22 deletions

diff --git a/Demos/Device/ClassDriver/CDC/CDC.c b/Demos/Device/ClassDriver/CDC/CDC.c
index 90cbaf0bc..5d74cb1a5 100644
--- a/Demos/Device/ClassDriver/CDC/CDC.c
+++ b/Demos/Device/ClassDriver/CDC/CDC.c
@@ -60,27 +60,10 @@ USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
 			},

 	};

 

-#if 0

-/* NOTE: Here you can set up a standard stream using the created virtual serial port, so that the standard stream functions in

- *       <stdio.h> can be used on the virtual serial port (e.g. fprintf(&USBSerial, "Test"); to print a string).

+/** Standard file stream for the CDC interface when set up, so that the virtual CDC COM port can be

+ *  used like any regular character stream in the C APIs

  */

-

-static int CDC_putchar(char c, FILE *stream)

-{

-	CDC_Device_SendByte(&VirtualSerial_CDC_Interface, c);

-	return 0;

-}

-

-static int CDC_getchar(FILE *stream)

-{

-	if (!(CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface)))

-	  return -1;

-

-	return CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);

-}

-

-static FILE USBSerial = FDEV_SETUP_STREAM(CDC_putchar, CDC_getchar, _FDEV_SETUP_RW);

-#endif

+static FILE USBSerialStream;

 

 /** Main program entry point. This routine contains the overall program flow, including initial

  *  setup of all components and the main program loop.

@@ -89,6 +72,9 @@ int main(void)
 {

 	SetupHardware();

 	

+	/* Create a regular character stream for the interface so that it can be used with the stdio.h functions */

+	CDC_Device_CreateStream(&VirtualSerial_CDC_Interface, &USBSerialStream);

+

 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);

 

 	for (;;)

@@ -143,8 +129,12 @@ void CheckJoystickMovement(void)
 	if ((ReportString != NULL) && (ActionSent == false))

 	{

 		ActionSent = true;

-		

-		CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString, strlen(ReportString));		

+

+		// Write the string to the virtual COM port via the created character stream

+		fputs(ReportString, &USBSerialStream);

+

+		// Alternatively, without the stream:

+		// CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString, strlen(ReportString));

 	}

 }

 

diff --git a/Demos/Device/ClassDriver/CDC/CDC.h b/Demos/Device/ClassDriver/CDC/CDC.h
index ee375a466..9cc72487c 100644
--- a/Demos/Device/ClassDriver/CDC/CDC.h
+++ b/Demos/Device/ClassDriver/CDC/CDC.h
@@ -41,6 +41,7 @@
 		#include <avr/wdt.h>

 		#include <avr/power.h>

 		#include <string.h>

+		#include <stdio.h>

 

 		#include "Descriptors.h"