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-rw-r--r--cores/arduino/CDC.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/cores/arduino/CDC.cpp b/cores/arduino/CDC.cpp
index 5e872c5..afbc65d 100644
--- a/cores/arduino/CDC.cpp
+++ b/cores/arduino/CDC.cpp
@@ -163,6 +163,11 @@ int Serial_::read(void)
return USB_Recv(CDC_RX);
}
+int Serial_::availableForWrite(void)
+{
+ return USB_SendSpace(CDC_TX);
+}
+
void Serial_::flush(void)
{
USB_Flush(CDC_TX);