X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/c830fcb0e1d42c1300ebe78a8b33924054b63a87..5930f47bf4b9b4490daf80d44595ff14ee7ce165:/Demos/Host/LowLevel/CDCHost/CDCHost.c

diff --git a/Demos/Host/LowLevel/CDCHost/CDCHost.c b/Demos/Host/LowLevel/CDCHost/CDCHost.c
index 0068a5951..c4322587e 100644
--- a/Demos/Host/LowLevel/CDCHost/CDCHost.c
+++ b/Demos/Host/LowLevel/CDCHost/CDCHost.c
@@ -36,8 +36,54 @@
  
 #include "CDCHost.h"
 
+#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).
+ */
+	
+static int CDC_putchar(char c, FILE *stream)
+{	  
+	Pipe_SelectPipe(CDC_DATAPIPE_OUT);
+	
+	if (Pipe_WaitUntilReady())
+	  return -1;
+
+	Pipe_Write_Byte(c);
+	Pipe_ClearIN();
+	
+	return 0;
+}
+
+static int CDC_getchar(FILE *stream)
+{
+	int c;
+
+	Pipe_SelectPipe(CDC_DATAPIPE_IN);
+	
+	for (;;)
+	{
+		if (Pipe_WaitUntilReady())
+		  return -1;
+	
+		if (!(Pipe_BytesInPipe()))
+		{
+			Pipe_ClearOUT();
+		}
+		else
+		{
+			c = Pipe_Read_Byte();
+			break;
+		}
+	}
+	
+	return c;
+}
+
+static FILE USBSerial = FDEV_SETUP_STREAM(CDC_putchar, CDC_getchar, _FDEV_SETUP_RW);
+#endif
+
 /** Main program entry point. This routine configures the hardware required by the application, then
- *  starts the scheduler to run the application tasks.
+ *  enters a loop to run the application tasks in sequence.
  */
 int main(void)
 {
@@ -170,8 +216,9 @@ void CDC_Host_Task(void)
 			USB_HostState = HOST_STATE_Configured;
 			break;
 		case HOST_STATE_Configured:
-			/* Select and the data IN pipe */
+			/* Select the data IN pipe */
 			Pipe_SelectPipe(CDC_DATAPIPE_IN);
+			Pipe_SetPipeToken(PIPE_TOKEN_IN);
 			Pipe_Unfreeze();
 
 			/* Check to see if a packet has been received */