diff options
Diffstat (limited to 'Demos/Device/LowLevel/CDC/CDC.c')
| -rw-r--r-- | Demos/Device/LowLevel/CDC/CDC.c | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/Demos/Device/LowLevel/CDC/CDC.c b/Demos/Device/LowLevel/CDC/CDC.c index 99343894e..ac0623a4d 100644 --- 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,
.DataBits = 8 };
+#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)
+{
+ if (!(USB_IsConnected))
+ return -1;
+
+ Endpoint_SelectEndpoint(CDC_TX_EPNUM);
+ while (!(Endpoint_IsReadWriteAllowed()));
+ Endpoint_Write_Byte(c);
+ Endpoint_ClearIN();
+
+ return 0;
+}
+
+static int CDC_getchar (FILE *stream)
+{
+ int c;
+
+ Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+
+ for (;;)
+ {
+ if (!(USB_IsConnected))
+ return -1;
+
+ while (!(Endpoint_IsReadWriteAllowed()));
+
+ if (!(Endpoint_BytesInEndpoint()))
+ {
+ Endpoint_ClearOUT();
+ }
+ else
+ {
+ c = Endpoint_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 contains the overall program flow, including initial
* setup of all components and the main program loop.
*/
@@ -208,8 +256,8 @@ void CDC_Task(void) #if 0
/* NOTE: Here you can use the notification endpoint to send back line state changes to the host, for the special RS-232
- handshake signal lines (and some error states), via the CONTROL_LINE_IN_* masks and the following code:
- */
+ * handshake signal lines (and some error states), via the CONTROL_LINE_IN_* masks and the following code:
+ */
USB_Notification_Header_t Notification = (USB_Notification_Header_t)
{
.NotificationType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
|