diff options
| -rw-r--r-- | os/hal/include/usb.h | 3 | ||||
| -rw-r--r-- | os/hal/src/usb.c | 7 | ||||
| -rw-r--r-- | readme.txt | 2 |
3 files changed, 8 insertions, 4 deletions
diff --git a/os/hal/include/usb.h b/os/hal/include/usb.h index 8d3bcde6b..6f18d7c55 100644 --- a/os/hal/include/usb.h +++ b/os/hal/include/usb.h @@ -249,7 +249,8 @@ typedef enum { */
typedef enum {
USB_EP0_WAITING_SETUP, /**< Waiting for SETUP data. */
- USB_EP0_TX, /**< Transmitting. */
+ USB_EP0_TX, /**< Trasmitting. */
+ USB_EP0_WAITING_TX0, /**< Waiting transmit 0 */
USB_EP0_WAITING_STS, /**< Waiting status. */
USB_EP0_RX, /**< Receiving. */
USB_EP0_SENDING_STS, /**< Sending status. */
diff --git a/os/hal/src/usb.c b/os/hal/src/usb.c index 9c3825910..745b2d436 100644 --- a/os/hal/src/usb.c +++ b/os/hal/src/usb.c @@ -693,15 +693,16 @@ void _usb_ep0in(USBDriver *usbp, usbep_t ep) { /* If the transmitted size is less than the requested size and it is a
multiple of the maximum packet size then a zero size packet must be
transmitted.*/
- if ((usbp->ep0n < max) &&
- ((usbp->ep0n % usbp->epc[0]->in_maxsize) == 0)) {
+ if ((usbp->ep0n < max) && ((usbp->ep0n % usbp->epc[0]->in_maxsize) == 0)) {
usbPrepareTransmit(usbp, 0, NULL, 0);
chSysLockFromIsr();
usbStartTransmitI(usbp, 0);
chSysUnlockFromIsr();
+ usbp->ep0state = USB_EP0_WAITING_TX0;
return;
}
-
+ /* Falls into, it is intentional.*/
+ case USB_EP0_WAITING_TX0:
/* Transmit phase over, receiving the zero sized status packet.*/
usbp->ep0state = USB_EP0_WAITING_STS;
usbPrepareReceive(usbp, 0, NULL, 0);
diff --git a/readme.txt b/readme.txt index 7b36831e1..9547ba4b9 100644 --- a/readme.txt +++ b/readme.txt @@ -89,6 +89,8 @@ *****************************************************************************
*** 2.5.2 ***
+- FIX: Fixed USB driver possible deadlock under certain configurations (bug
+ #406)(backported to 2.4.4).
- FIX: Fixed USB driver cannot be stopped (bug #405)(backported to 2.4.4).
- FIX: Fixed several spelling errors (bug #404).
- FIX: Fixed serial port in STM32F3 discovery test case (bug #402).
|