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incubator-nuttx
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Fix null packet handling in the PIC32 USB device driver. This is a critical bug fix for PIC32. Add support for the USB monitor to the Sure-PIC32MX configuration

This commit is contained in:
Gregory Nutt 2013-05-28 13:36:01 -06:00
parent 03478d02aa
commit 34c9e7284b
1 changed files with 14 additions and 4 deletions
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18
arch/mips/src/pic32mx/pic32mx-usbdev.c
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@ -1154,7 +1154,7 @@ static int pic32mx_wrstart(struct pic32mx_usbdev_s *priv,
/* Even if the request is incomplete, transfer of all the requested
* bytes may already been started. NOTE: inflight[1] should be zero
* because we know that there is a BDT availalbe.
* because we know that there is a BDT available.
*/
#ifdef CONFIG_USBDEV_NOWRITEAHEAD
@ -1169,10 +1169,20 @@ static int pic32mx_wrstart(struct pic32mx_usbdev_s *priv,
xfrd += privreq->inflight[0];
bytesleft -= privreq->inflight[0];
}
/* Do we need to send a null packet after this packet? */
else if (privep->txnullpkt)
{
/* Yes... set up for the NULL packet transfer */
xfrd = privreq->req.len;
bytesleft = 0;
}
else
{
/* Yes.. we need to get the next request from the head of the
* pending request list.
/* No.. We are finished with this request. We need to get the
* next request from the head of the pending request list.
*/
privreq = NULL;
@ -1220,7 +1230,7 @@ static int pic32mx_wrstart(struct pic32mx_usbdev_s *priv,
/* Get the number of bytes left to be sent in the packet */
nbytes = bytesleft;
if (nbytes > 0)
if (nbytes > 0 || privep->txnullpkt)
{
/* Either send the maxpacketsize or all of the remaining data in
* the request.