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| author | Dean Camera <dean@fourwalledcubicle.com> | 2009-11-12 12:47:15 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2009-11-12 12:47:15 +0000 |
| commit | 652042111c7c058bd56d9847002f166507f492d4 (patch) | |
| tree | e32f27653cd516ae4c2353e8087d1386ac4e7dc9 /LUFA/Drivers/USB/Class/Device/CDC.c | |
| parent | 6a46f0025a4d44ca2c747745f542e8f475dd9b28 (diff) | |
| download | lufa-652042111c7c058bd56d9847002f166507f492d4.tar.gz lufa-652042111c7c058bd56d9847002f166507f492d4.tar.bz2 lufa-652042111c7c058bd56d9847002f166507f492d4.zip | |
Add blocking versions of the CDC Class driver streams, for applications requiring blocking reads.
Diffstat (limited to 'LUFA/Drivers/USB/Class/Device/CDC.c')
| -rw-r--r-- | LUFA/Drivers/USB/Class/Device/CDC.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/LUFA/Drivers/USB/Class/Device/CDC.c b/LUFA/Drivers/USB/Class/Device/CDC.c index c86b970a3..aafe48076 100644 --- 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);
}
+void CDC_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream)
+{
+ *Stream = (FILE)FDEV_SETUP_STREAM(CDC_Device_putchar, CDC_Device_getchar_Blocking, _FDEV_SETUP_RW);
+ fdev_set_udata(Stream, CDCInterfaceInfo);
+}
+
static int CDC_Device_putchar(char c, FILE* Stream)
{
return CDC_Device_SendByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream), c) ? _FDEV_ERR : 0;
@@ -253,4 +259,15 @@ static int CDC_Device_getchar(FILE* Stream) return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
}
+static int CDC_Device_getchar_Blocking(FILE* Stream)
+{
+ while (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))))
+ {
+ CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
+ USB_USBTask();
+ }
+
+ return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
+}
+
#endif
|