From fc4b9b386a80d06c73e03d70767643aae3961e2a Mon Sep 17 00:00:00 2001
From: AJM <poslathian@poslathian.(none)>
Date: Sun, 25 Apr 2010 16:13:07 -0400
Subject: fixed the receive 0  bytes bug, where full buffers block the usb port
 and never get re-enabled.

---
 core/usb/usb.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'core/usb/usb.c')

diff --git a/core/usb/usb.c b/core/usb/usb.c
index cb8de52..a8298c0 100644
--- a/core/usb/usb.c
+++ b/core/usb/usb.c
@@ -407,6 +407,12 @@ uint8 usbReceiveBytes(uint8* recvBuf, uint8 len) {
   }
 
   maxNewBytes += len;
+
+  /* re-enable the rx endpoint which we had set to receive 0 bytes */
+  if (maxNewBytes - len == 0) {
+    SetEPRxCount(VCOM_RX_ENDP,maxNewBytes);
+  }
+
   return len;
 }
 
@@ -415,10 +421,12 @@ void usbSendHello(void) {
 
   uint8 bufin = 48 + recvBufIn;;
   uint8 bufout = 48 + recvBufOut;
+  uint8 avail  = 48 + usbBytesAvailable();
 
   char *line = "\r\n";
   while(usbSendBytes(&bufin,1) == 0);
   while(usbSendBytes(&bufout,1) == 0);
+  while(usbSendBytes(&avail,1) == 0);
   while(usbSendBytes((uint8*)line,2) == 0);
 
   uint8 recv[64];
-- 
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