/**
* @brief Default data received callback.
* @details The application must use this function as callback for the OUT
* data endpoint.
*
* @param[in] usbp pointer to the @p USBDriver object
* @param[in] ep endpoint number
*/
void bduDataReceived(USBDriver *usbp, usbep_t ep) {
size_t n, maxsize;
BulkUSBDriver *bdup = usbp->out_params[ep - 1];
if (bdup == NULL)
return;
chSysLockFromIsr();
chnAddFlagsI(bdup, CHN_INPUT_AVAILABLE);
/* Writes to the input queue can only happen when there is enough space
to hold at least one packet.*/
maxsize = usbp->epc[ep]->out_maxsize;
if ((n = chIQGetEmptyI(&bdup->iqueue)) >= maxsize) {
/* The endpoint cannot be busy, we are in the context of the callback,
so a packet is in the buffer for sure.*/
chSysUnlockFromIsr();
n = (n / maxsize) * maxsize;
usbPrepareQueuedReceive(usbp, ep, &bdup->iqueue, n);
chSysLockFromIsr();
usbStartReceiveI(usbp, ep);
}
chSysUnlockFromIsr();
}
/**
* @brief Notification of data removed from the input queue.
*/
static void inotify(GenericQueue *qp) {
size_t n, maxsize;
BulkUSBDriver *bdup = chQGetLink(qp);
/* If the USB driver is not in the appropriate state then transactions
must not be started.*/
if ((usbGetDriverStateI(bdup->config->usbp) != USB_ACTIVE) ||
(bdup->state != BDU_READY))
return;
/* If there is in the queue enough space to hold at least one packet and
a transaction is not yet started then a new transaction is started for
the available space.*/
maxsize = bdup->config->usbp->epc[bdup->config->bulk_out]->out_maxsize;
if (!usbGetReceiveStatusI(bdup->config->usbp, bdup->config->bulk_out) &&
((n = chIQGetEmptyI(&bdup->iqueue)) >= maxsize)) {
chSysUnlock();
n = (n / maxsize) * maxsize;
usbPrepareQueuedReceive(bdup->config->usbp,
bdup->config->bulk_out,
&bdup->iqueue, n);
chSysLock();
usbStartReceiveI(bdup->config->usbp, bdup->config->bulk_out);
}
}
/**
* @brief Default data received callback.
* @details The application must use this function as callback for the OUT
* data endpoint.
*
* @param[in] usbp pointer to the @p USBDriver object
* @param[in] ep endpoint number
*/
void sduDataReceived(USBDriver *usbp, usbep_t ep) {
size_t n, maxsize;
SerialUSBDriver *sdup = usbp->param;
(void)ep;
chSysLockFromIsr();
chnAddFlagsI(sdup, CHN_INPUT_AVAILABLE);
/* Writes to the input queue can only happen when there is enough space
to hold at least one packet.*/
maxsize = usbp->epc[USB_CDC_DATA_AVAILABLE_EP]->out_maxsize;
if ((n = chIQGetEmptyI(&sdup->iqueue)) >= maxsize) {
/* The endpoint cannot be busy, we are in the context of the callback,
so a packet is in the buffer for sure.*/
chSysUnlockFromIsr();
n = (n / maxsize) * maxsize;
usbPrepareQueuedReceive(usbp, ep, &sdup->iqueue, n);
chSysLockFromIsr();
usbStartReceiveI(usbp, ep);
}
chSysUnlockFromIsr();
}
/**
* @brief Notification of data removed from the input queue.
*/
static void inotify(GenericQueue *qp) {
size_t n, maxsize;
SerialUSBDriver *sdup = chQGetLink(qp);
/* If the USB driver is not in the appropriate state then transactions
must not be started.*/
if (usbGetDriverStateI(sdup->config->usbp) != USB_ACTIVE)
return;
/* If there is in the queue enough space to hold at least one packet and
a transaction is not yet started then a new transaction is started for
the available space.*/
maxsize = sdup->config->usbp->epc[USB_CDC_DATA_AVAILABLE_EP]->out_maxsize;
if (!usbGetReceiveStatusI(sdup->config->usbp, USB_CDC_DATA_AVAILABLE_EP) &&
((n = chIQGetEmptyI(&sdup->iqueue)) >= maxsize)) {
chSysUnlock();
n = (n / maxsize) * maxsize;
usbPrepareQueuedReceive(sdup->config->usbp,
USB_CDC_DATA_AVAILABLE_EP,
&sdup->iqueue, n);
chSysLock();
usbStartReceiveI(sdup->config->usbp, USB_CDC_DATA_AVAILABLE_EP);
}
}
size_t InQueue::getEmptyI(void) {
return chIQGetEmptyI(&iq);
}