/**
* @brief USB low level reset routine.
*
* @param[in] usbp pointer to the @p USBDriver object
*
* @notapi
*/
void usb_lld_reset(USBDriver *usbp) {
unsigned i;
stm32_otg_t *otgp = usbp->otg;
/* Flush the Tx FIFO.*/
otg_txfifo_flush(usbp, 0);
/* All endpoints in NAK mode, interrupts cleared.*/
for (i = 0; i <= usbp->otgparams->num_endpoints; i++) {
otgp->ie[i].DIEPCTL = DIEPCTL_SNAK;
otgp->oe[i].DOEPCTL = DOEPCTL_SNAK;
otgp->ie[i].DIEPINT = 0xFF;
otgp->oe[i].DOEPINT = 0xFF;
}
/* Endpoint interrupts all disabled and cleared.*/
otgp->DAINT = 0xFFFFFFFF;
otgp->DAINTMSK = DAINTMSK_OEPM(0) | DAINTMSK_IEPM(0);
/* Resets the FIFO memory allocator.*/
otg_ram_reset(usbp);
/* Receive FIFO size initialization, the address is always zero.*/
otgp->GRXFSIZ = usbp->otgparams->rx_fifo_size;
otg_rxfifo_flush(usbp);
/* Resets the device address to zero.*/
otgp->DCFG = (otgp->DCFG & ~DCFG_DAD_MASK) | DCFG_DAD(0);
/* Enables also EP-related interrupt sources.*/
otgp->GINTMSK |= GINTMSK_RXFLVLM | GINTMSK_OEPM | GINTMSK_IEPM;
otgp->DIEPMSK = DIEPMSK_TOCM | DIEPMSK_XFRCM;
otgp->DOEPMSK = DOEPMSK_STUPM | DOEPMSK_XFRCM;
/* EP0 initialization, it is a special case.*/
usbp->epc[0] = &ep0config;
otgp->oe[0].DOEPTSIZ = 0;
otgp->oe[0].DOEPCTL = DOEPCTL_SD0PID | DOEPCTL_USBAEP | DOEPCTL_EPTYP_CTRL |
DOEPCTL_MPSIZ(ep0config.out_maxsize);
otgp->ie[0].DIEPTSIZ = 0;
otgp->ie[0].DIEPCTL = DIEPCTL_SD0PID | DIEPCTL_USBAEP | DIEPCTL_EPTYP_CTRL |
DIEPCTL_TXFNUM(0) | DIEPCTL_MPSIZ(ep0config.in_maxsize);
otgp->DIEPTXF0 = DIEPTXF_INEPTXFD(ep0config.in_maxsize / 4) |
DIEPTXF_INEPTXSA(otg_ram_alloc(usbp,
ep0config.in_maxsize / 4));
}
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;
}
/**
* @brief Sets the USB address.
*
* @param[in] usbp pointer to the @p USBDriver object
*
* @notapi
*/
void usb_lld_set_address(USBDriver *usbp) {
stm32_otg_t *otgp = usbp->otg;
otgp->DCFG = (otgp->DCFG & ~DCFG_DAD_MASK) | DCFG_DAD(usbp->address);
}