Added new EEPROM and FLASH buffer versions of the Endpoint and Pipe stream functions...

[pub/USBasp.git] / Demos / Device / LowLevel / CDC / CDC.c

diff --git a/Demos/Device/LowLevel/CDC/CDC.c b/Demos/Device/LowLevel/CDC/CDC.c
index 9934389..ac0623a 100644 (file)
--- a/Demos/Device/LowLevel/CDC/CDC.c
+++ b/Demos/Device/LowLevel/CDC/CDC.c
@@ -50,6 +50,54 @@ CDC_Line_Coding_t LineCoding = { .BaudRateBPS = 9600,
                                  .ParityType  = Parity_None,\r
                                  .DataBits    = 8            };\r
 \r
+#if 0\r
+/* NOTE: Here you can set up a standard stream using the created virtual serial port, so that the standard stream functions in\r
+ *       <stdio.h> can be used on the virtual serial port (e.g. fprintf(&USBSerial, "Test"); to print a string).\r
+ */\r
+       \r
+static int CDC_putchar (char c, FILE *stream)\r
+{\r
+       if (!(USB_IsConnected))\r
+         return -1;\r
+         \r
+       Endpoint_SelectEndpoint(CDC_TX_EPNUM);\r
+       while (!(Endpoint_IsReadWriteAllowed()));\r
+       Endpoint_Write_Byte(c);\r
+       Endpoint_ClearIN();\r
+       \r
+       return 0;\r
+}\r
+\r
+static int CDC_getchar (FILE *stream)\r
+{\r
+       int c;\r
+         \r
+       Endpoint_SelectEndpoint(CDC_RX_EPNUM);\r
+       \r
+       for (;;)\r
+       {\r
+               if (!(USB_IsConnected))\r
+                 return -1;\r
+\r
+               while (!(Endpoint_IsReadWriteAllowed()));\r
+       \r
+               if (!(Endpoint_BytesInEndpoint()))\r
+               {\r
+                       Endpoint_ClearOUT();\r
+               }\r
+               else\r
+               {\r
+                       c = Endpoint_Read_Byte();\r
+                       break;\r
+               }\r
+       }\r
+       \r
+       return c;\r
+}\r
+\r
+static FILE USBSerial = FDEV_SETUP_STREAM(CDC_putchar, CDC_getchar, _FDEV_SETUP_RW);\r
+#endif\r
+\r
 /** Main program entry point. This routine contains the overall program flow, including initial\r
  *  setup of all components and the main program loop.\r
  */\r
@@ -208,8 +256,8 @@ void CDC_Task(void)
        \r
 #if 0\r
        /* NOTE: Here you can use the notification endpoint to send back line state changes to the host, for the special RS-232\r
-                handshake signal lines (and some error states), via the CONTROL_LINE_IN_* masks and the following code:\r
-       */\r
+        *       handshake signal lines (and some error states), via the CONTROL_LINE_IN_* masks and the following code:\r
+        */\r
        USB_Notification_Header_t Notification = (USB_Notification_Header_t)\r
                {\r
                        .NotificationType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),\r