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Fix 2 causes of protocol errors (there are more

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@977 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2008-10-04 00:12:40 +00:00
parent 52b2d03e27
commit 52b215159d
1 changed files with 12 additions and 9 deletions
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21
arch/arm/src/lpc214x/lpc214x_usbdev.c
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@ -304,6 +304,7 @@ struct lpc214x_ep_s
ubyte epphy; /* Physical EP address */
ubyte stalled:1; /* Endpoint is halted */
ubyte halted:1; /* Endpoint feature halted */
ubyte txnullpkt:1; /* Null packet needed at end of transfer */
};
/* This represents a DMA descriptor */
@ -1027,16 +1028,21 @@ static int lpc214x_wrrequest(struct lpc214x_ep_s *privep)
*/
usbtrace(TRACE_WRITE(privep->epphy), privreq->req.xfrd);
if (bytesleft >= 0)
if (bytesleft > 0 || privep->txnullpkt)
{
/* Try to send maxpacketsize -- unless we don't have that many
* bytes to send.
*/
nbytes = privep->ep.maxpacket;
if (nbytes > bytesleft)
if (bytesleft > privep->ep.maxpacket)
{
nbytes = privep->ep.maxpacket;
privep->txnullpkt = 0;
}
else
{
nbytes = bytesleft;
privep->txnullpkt = (bytesleft == privep->ep.maxpacket);
}
/* Send the largest number of bytes that we can in this packet */
@ -1053,9 +1059,10 @@ static int lpc214x_wrrequest(struct lpc214x_ep_s *privep)
* then we are finished with the transfer
*/
if (bytesleft <= 0)
if (bytesleft <= 0 || !privep->txnullpkt)
{
usbtrace(TRACE_COMPLETE(privep->epphy), privreq->req.xfrd);
privep->txnullpkt = 0;
lpc214x_reqcomplete(privep, OK);
return OK;
}
@ -1376,11 +1383,6 @@ static void lpc214x_dispatchrequest(struct lpc214x_usbdev_s *priv,
priv->stalled = 1;
}
else
{
lpc214x_epwrite(LPC214X_EP0_IN, NULL, 0);
priv->ep0state = LPC214X_EP0SHORTWRITE;
}
}
}
@ -2610,6 +2612,7 @@ static int lpc214x_epsubmit(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s
{
/* Add the new request to the request queue for the endpoint */
privep->txnullpkt = 0;
lpc214x_rqenqueue(privep, privreq);
usbtrace(TRACE_OUTREQQUEUED(privep->epphy), privreq->req.len);
ret = lpc214x_rdrequest(privep);