/**
* @brief Prepares for a receive operation.
*
* @param[in] usbp pointer to the @p USBDriver object
* @param[in] ep endpoint number
*
* @notapi
*/
void usb_lld_prepare_receive(USBDriver *usbp, usbep_t ep) {
uint32_t pcnt;
USBOutEndpointState *osp = usbp->epc[ep]->out_state;
/* Transfer initialization.*/
pcnt = (osp->rxsize + usbp->epc[ep]->out_maxsize - 1) /
usbp->epc[ep]->out_maxsize;
usbp->otg->oe[ep].DOEPTSIZ = DOEPTSIZ_STUPCNT(3) | DOEPTSIZ_PKTCNT(pcnt) |
DOEPTSIZ_XFRSIZ(usbp->epc[ep]->out_maxsize);
}
void Endpoint_t::Receive(uint32_t Len) {
Uart.Printf("PrepRX L=%u\r\n", Len);
// if(IsReceiving) return;
// Prepare reception
uint32_t Cnt = (Len + OutMaxSz - 1) / OutMaxSz;
OTG_FS->oe[SelfN].DOEPTSIZ &= ~((uint32_t) 0x7F);
OTG_FS->oe[SelfN].DOEPTSIZ |= DOEPTSIZ_PKTCNT(Cnt) | DOEPTSIZ_XFRSIZ(OutMaxSz);
Uart.Printf("DOEPTSIZ: %X\r\n", OTG_FS->oe[0].DOEPTSIZ);
// Start reception
chSysLockFromIsr();
// IsReceiving = true;
ClearOutNAK();
EnableOut();
chSysUnlockFromIsr();
}
