/**
* @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 Usb_t::IReset() {
Uart.Printf("========= Rst =========\r\n");
TxFifoFlush();
// Set all EPs in NAK mode and clear Irqs
for(uint8_t i=0; i < USB_EP_CNT; i++) {
OTG_FS->ie[i].DIEPCTL = DIEPCTL_SNAK;
OTG_FS->oe[i].DOEPCTL = DOEPCTL_SNAK;
OTG_FS->ie[i].DIEPINT = 0xFF;
OTG_FS->oe[i].DOEPINT = 0xFF;
Ep[i].IsReceiving = false;
Ep[i].IsTransmitting = false;
Ep[i].IsTxPending = false;
}
// Disable and clear all EP irqs
OTG_FS->DAINT = 0xFFFFFFFF;
OTG_FS->DAINTMSK = DAINTMSK_OEPM(0) | DAINTMSK_IEPM(0);
OTG_FS->DIEPEMPMSK &= 0xFFFF0000;
MemAllocator.Reset();
// RX FIFO init, the address is always zero
OTG_FS->GRXFSIZ = RX_FIFO_SZW;
RxFifoFlush();
// Reset device address to zero
OTG_FS->DCFG = (OTG_FS->DCFG & ~DCFG_DAD_MASK) | DCFG_DAD(0);
// Enable EP-related irqs
OTG_FS->GINTMSK |= GINTMSK_RXFLVLM | GINTMSK_OEPM | GINTMSK_IEPM;
OTG_FS->DIEPMSK = DIEPMSK_XFRCM;
OTG_FS->DOEPMSK = DOEPMSK_STUPM | DOEPMSK_XFRCM | DOEPMSK_OTEPDM;
// Init EP0
OTG_FS->ie[0].DIEPINT |= 0x5B; // }
OTG_FS->oe[0].DOEPINT |= 0x5B; // } Clear interrupts
OTG_FS->oe[0].DOEPTSIZ = DOEPTSIZ_STUPCNT(3) | DOEPTSIZ_XFRSIZ(Ep[0].OutMaxSz);
OTG_FS->oe[0].DOEPCTL = 0; // EP size is 64 bytes
OTG_FS->ie[0].DIEPTSIZ = 0;
OTG_FS->ie[0].DIEPCTL = DIEPCTL_TXFNUM(0);
OTG_FS->DIEPTXF0 = DIEPTXF_INEPTXFD(TX0_FIFO_SZW) | DIEPTXF_INEPTXSA(RX_FIFO_SZW);
// OTG_FS->DIEPTXF0 = DIEPTXF_INEPTXFD(EP0_SZ / 4) | DIEPTXF_INEPTXSA(MemAllocator.Alloc(EP0_SZ / 4));
Ep0State = esWaitingSetup;
Ep[0].Rx.Ptr = Ep0RxBuf;
}
