USB TX fix

Fix USB serial port data loss during transmit. Signed-off-by: Paul Brook <paul@codesourcery.com>
pbrook · Sep 27, 2012 · 0d4947f · 0d4947f
1 parent bd9ccb4
commit 0d4947f
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/cores/minimus/USBCore.cpp b/cores/minimus/USBCore.cpp
@@ -280,11 +280,12 @@ int USB_Send(u8 ep, const void* d, int len)
 			continue;
 		}
 
-		if (n > len)
-			n = len;
-		len -= n;
 		{
 			LockEP lock(ep);
+			u8 n = USB_SendSpace(ep);
+			if (n > len)
+				n = len;
+			len -= n;
 			if (ep & TRANSFER_ZERO)
 			{
 				while (n--)