Add blocking versions of the CDC Class driver streams, for applications requiring...

[pub/USBasp.git] / LUFA / Drivers / USB / Class / Device / CDC.c

diff --git a/LUFA/Drivers/USB/Class/Device/CDC.c b/LUFA/Drivers/USB/Class/Device/CDC.c
index c86b970..aafe480 100644 (file)
--- a/LUFA/Drivers/USB/Class/Device/CDC.c
+++ b/LUFA/Drivers/USB/Class/Device/CDC.c
@@ -240,6 +240,12 @@ void CDC_Device_CreateStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE*
        fdev_set_udata(Stream, CDCInterfaceInfo);\r
 }\r
 \r
+void CDC_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream)\r
+{\r
+       *Stream = (FILE)FDEV_SETUP_STREAM(CDC_Device_putchar, CDC_Device_getchar_Blocking, _FDEV_SETUP_RW);\r
+       fdev_set_udata(Stream, CDCInterfaceInfo);\r
+}\r
+\r
 static int CDC_Device_putchar(char c, FILE* Stream)\r
 {\r
        return CDC_Device_SendByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream), c) ? _FDEV_ERR : 0;\r
@@ -253,4 +259,15 @@ static int CDC_Device_getchar(FILE* Stream)
        return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));\r
 }\r
 \r
+static int CDC_Device_getchar_Blocking(FILE* Stream)\r
+{\r
+       while (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))))\r
+       {\r
+               CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));\r
+               USB_USBTask();\r
+       }\r
+\r
+       return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));\r
+}\r
+\r
 #endif\r