diff --git a/inc/usb.h b/inc/usb.h
index 5c3e589..da6160a 100644
--- a/inc/usb.h
+++ b/inc/usb.h
@@ -167,6 +167,14 @@
     #define usbd_hw usbd_otgfs
     #endif  //__ASSEMBLER__
 
+#elif defined(STM32H747xx)
+
+    #define USBD_STM32H747XXHS
+
+    #if !defined(__ASSEMBLER__)
+    extern const struct usbd_driver usbd_otghs;
+    #define usbd_hw usbd_otghs
+    #endif
 #else
     #error Unsupported STM32 family
 #endif
diff --git a/src/usbd_stm32h747xx_otghs.c b/src/usbd_stm32h747xx_otghs.c
new file mode 100644
index 0000000..6af42e3
--- /dev/null
+++ b/src/usbd_stm32h747xx_otghs.c
@@ -0,0 +1,561 @@
+/* This file is the part of the Lightweight USB device Stack for STM32 microcontrollers
+ *
+ * Copyright ©2016 Dmitry Filimonchuk <dmitrystu[at]gmail[dot]com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "stm32.h"
+#include "usb.h"
+
+#if defined(USBD_STM32H747XXHS)
+
+#define MAX_EP         4
+#define MAX_RX_PACKET  1024 /* in bytes */
+#define MAX_CONTROL_EP 1
+#define MAX_FIFO_SZ    1024 /* in 32-bit chunks */
+
+#define RX_FIFO_SZ ((5 * MAX_CONTROL_EP + 8) + ((MAX_RX_PACKET / 4) + 1) + (MAX_EP * 2) + 1) /* in 32-bit chunks */
+
+#define STATUS_VAL(x) (USBD_HW_ADDRFST | (x))
+
+static USB_OTG_GlobalTypeDef* const OTG  = (void*)(USB_OTG_HS_PERIPH_BASE + USB_OTG_GLOBAL_BASE);
+static USB_OTG_DeviceTypeDef* const OTGD = (void*)(USB_OTG_HS_PERIPH_BASE + USB_OTG_DEVICE_BASE);
+static volatile uint32_t* const OTGPCTL  = (void*)(USB_OTG_HS_PERIPH_BASE + USB_OTG_PCGCCTL_BASE);
+
+inline static uint32_t* EPFIFO(uint32_t ep) {
+    return (uint32_t*)(USB_OTG_HS_PERIPH_BASE + USB_OTG_FIFO_BASE + (ep << 12));
+}
+
+inline static USB_OTG_INEndpointTypeDef* EPIN(uint32_t ep) {
+    return (void*)(USB_OTG_HS_PERIPH_BASE + USB_OTG_IN_ENDPOINT_BASE + (ep << 5));
+}
+
+inline static USB_OTG_OUTEndpointTypeDef* EPOUT(uint32_t ep) {
+    return (void*)(USB_OTG_HS_PERIPH_BASE + USB_OTG_OUT_ENDPOINT_BASE + (ep << 5));
+}
+
+inline static void Flush_RX(void) {
+    _BST(OTG->GRSTCTL, USB_OTG_GRSTCTL_RXFFLSH);
+    _WBC(OTG->GRSTCTL, USB_OTG_GRSTCTL_RXFFLSH);
+}
+
+inline static void Flush_TX(uint8_t ep) {
+    _BMD(OTG->GRSTCTL, USB_OTG_GRSTCTL_TXFNUM, _VAL2FLD(USB_OTG_GRSTCTL_TXFNUM, ep) | USB_OTG_GRSTCTL_TXFFLSH);
+    _WBC(OTG->GRSTCTL, USB_OTG_GRSTCTL_TXFFLSH);
+}
+
+static uint32_t getinfo(void) {
+    if (!(RCC->AHB1ENR & RCC_AHB1ENR_USB1OTGHSEN))
+        return STATUS_VAL(0);
+
+    if (!(OTGD->DCTL & USB_OTG_DCTL_SDIS)) {
+        if (_FLD2VAL(USB_OTG_DSTS_ENUMSPD, OTGD->DSTS) == 0x00)
+            return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_HS);
+        if (_FLD2VAL(USB_OTG_DSTS_ENUMSPD, OTGD->DSTS) == 0x03)
+            return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_FS);
+    }
+    return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_NC);
+}
+
+static void ep_setstall(uint8_t ep, bool stall) {
+    if (ep & 0x80) {
+        ep &= 0x7F;
+        uint32_t _t = EPIN(ep)->DIEPCTL;
+        if (_t & USB_OTG_DIEPCTL_USBAEP) {
+            if (stall) {
+                _BST(_t, USB_OTG_DIEPCTL_STALL);
+            } else {
+                _BMD(_t, USB_OTG_DIEPCTL_STALL, USB_OTG_DIEPCTL_SD0PID_SEVNFRM | USB_OTG_DIEPCTL_CNAK);
+            }
+            EPIN(ep)->DIEPCTL = _t;
+        }
+    } else {
+        uint32_t _t = EPOUT(ep)->DOEPCTL;
+        if (_t & USB_OTG_DOEPCTL_USBAEP) {
+            if (stall) {
+                _BST(_t, USB_OTG_DOEPCTL_STALL);
+            } else {
+                _BMD(_t, USB_OTG_DOEPCTL_STALL, USB_OTG_DOEPCTL_SD0PID_SEVNFRM | USB_OTG_DOEPCTL_CNAK);
+            }
+            EPOUT(ep)->DOEPCTL = _t;
+        }
+    }
+}
+
+static bool ep_isstalled(uint8_t ep) {
+    if (ep & 0x80) {
+        ep &= 0x7F;
+        return (EPIN(ep)->DIEPCTL & USB_OTG_DIEPCTL_STALL) ? true : false;
+    } else {
+        return (EPOUT(ep)->DOEPCTL & USB_OTG_DOEPCTL_STALL) ? true : false;
+    }
+}
+
+static void enable(bool enable) {
+    if (enable) {
+        /* enabling USB_OTG in RCC */
+        _BST(RCC->AHB1ENR, RCC_AHB1ENR_USB1OTGHSEN);
+#ifdef USBD_ULPI
+        /* USB OTG HSULPI clock enable */
+        _BST(RCC->AHB1ENR, RCC_AHB1ENR_USB1OTGHSULPIEN);
+#endif
+        /* waiting AHB ready */
+        _WBS(OTG->GRSTCTL, USB_OTG_GRSTCTL_AHBIDL);
+        /* configure OTG as device */
+#ifdef USBD_ULPI
+        OTG->GUSBCFG = USB_OTG_GUSBCFG_FDMOD | _VAL2FLD(USB_OTG_GUSBCFG_TRDT, 0x09) |
+                       _VAL2FLD(USB_OTG_GUSBCFG_TOCAL, 0x01);
+
+        _BCL(OTG->GUSBCFG,
+             USB_OTG_GUSBCFG_TSDPS | USB_OTG_GUSBCFG_ULPIFSLS | USB_OTG_GUSBCFG_PHYSEL | USB_OTG_GUSBCFG_ULPIEVBUSD |
+                 USB_OTG_GUSBCFG_ULPIEVBUSI);
+#else
+        OTG->GUSBCFG = USB_OTG_GUSBCFG_FDMOD | USB_OTG_GUSBCFG_PHYSEL | _VAL2FLD(USB_OTG_GUSBCFG_TRDT, 0x09) |
+                       _VAL2FLD(USB_OTG_GUSBCFG_TOCAL, 0x01);
+#endif
+        /* configuring Vbus sense */
+#if defined(USBD_VBUS_DETECT)
+        _BST(OTG->GCCFG, USB_OTG_GCCFG_VBDEN);
+#else
+        _BST(OTG->GOTGCTL, USB_OTG_GOTGCTL_BVALOEN);
+        _BST(OTG->GOTGCTL, USB_OTG_GOTGCTL_BVALOVAL);
+#endif
+
+        _BCL(OTG->GCCFG, USB_OTG_GCCFG_PWRDWN);
+
+        /* enable PHY clock */
+        *OTGPCTL = 0;
+        /* soft disconnect device */
+        _BST(OTGD->DCTL, USB_OTG_DCTL_SDIS);
+
+        /* Setup USB HS speed */
+        _BMD(OTGD->DCFG, USB_OTG_DCFG_DSPD, _VAL2FLD(USB_OTG_DCFG_DSPD, 0x00));
+
+        /* setting max RX FIFO size */
+        OTG->GRXFSIZ = RX_FIFO_SZ;
+        /* setting up EP0 TX FIFO SZ as 64 bytes */
+        OTG->DIEPTXF0_HNPTXFSIZ = RX_FIFO_SZ | (0x10 << 16);
+        /* unmask EP interrupts */
+        OTGD->DIEPMSK = USB_OTG_DIEPMSK_XFRCM;
+        OTGD->DOEPMSK = USB_OTG_DOEPMSK_STUPM;
+        /* unmask core interrupts */
+        OTG->GINTMSK = USB_OTG_GINTMSK_USBRST | USB_OTG_GINTMSK_ENUMDNEM |
+#if !defined(USBD_SOF_DISABLED)
+                       USB_OTG_GINTMSK_SOFM |
+#endif
+                       USB_OTG_GINTMSK_OEPINT | USB_OTG_GINTMSK_IISOIXFRM | USB_OTG_GINTMSK_PXFRM_IISOOXFRM |
+                       USB_OTG_GINTMSK_EOPFM | USB_OTG_GINTMSK_USBSUSPM | USB_OTG_GINTMSK_WUIM |
+                       USB_OTG_GINTMSK_IEPINT | USB_OTG_GINTMSK_RXFLVLM;
+        /* clear pending interrupts */
+        OTG->GINTSTS = 0xFFFFFFFF;
+        /* unmask global interrupt */
+        _BST(OTG->GAHBCFG, USB_OTG_GAHBCFG_GINT);
+    } else {
+        if (RCC->AHB1ENR & RCC_AHB1ENR_USB1OTGHSEN) {
+            _BST(RCC->AHB1RSTR, RCC_AHB1RSTR_USB1OTGHSRST);
+            _BCL(RCC->AHB1RSTR, RCC_AHB1RSTR_USB1OTGHSRST);
+#ifdef USBD_ULPI
+            _BCL(RCC->AHB1ENR, RCC_AHB1ENR_USB1OTGHSULPIEN);
+#endif
+            _BCL(RCC->AHB1ENR, RCC_AHB1ENR_USB1OTGHSEN);
+        }
+    }
+}
+
+static uint8_t connect(bool connect) {
+    if (connect) {
+        _BST(OTG->GCCFG, USB_OTG_GCCFG_PWRDWN);
+        _BCL(OTGD->DCTL, USB_OTG_DCTL_SDIS);
+    } else {
+        _BST(OTGD->DCTL, USB_OTG_DCTL_SDIS);
+        _BCL(OTG->GCCFG, USB_OTG_GCCFG_PWRDWN);
+    }
+    return usbd_lane_unk;
+}
+
+static void setaddr(uint8_t addr) { _BMD(OTGD->DCFG, USB_OTG_DCFG_DAD, addr << 4); }
+
+/**\brief Helper. Set up TX fifo
+ * \param ep endpoint index
+ * \param epsize required max packet size in bytes
+ * \return true if TX fifo is successfully set
+ */
+static bool set_tx_fifo(uint8_t ep, uint16_t epsize) {
+    uint32_t _fsa = OTG->DIEPTXF0_HNPTXFSIZ;
+    /* calculating initial TX FIFO address. next from EP0 TX fifo */
+    _fsa = 0xFFFF & (_fsa + (_fsa >> 16));
+    /* looking for next free TX fifo address */
+    for (int i = 0; i < (MAX_EP - 1); i++) {
+        uint32_t _t = OTG->DIEPTXF[i];
+        if ((_t & 0xFFFF) < 0x200) {
+            _t = 0xFFFF & (_t + (_t >> 16));
+            if (_t > _fsa) {
+                _fsa = _t;
+            }
+        }
+    }
+    /* calculating requited TX fifo size */
+    /* getting in 32 bit terms */
+    epsize = (epsize + 0x03) >> 2;
+    /* it must be 16 32-bit words minimum */
+    if (epsize < 0x10)
+        epsize = 0x10;
+    /* checking for the available fifo */
+    if ((_fsa + epsize) > MAX_FIFO_SZ)
+        return false;
+    /* programming fifo register */
+    _fsa |= (epsize << 16);
+    OTG->DIEPTXF[ep - 1] = _fsa;
+    return true;
+}
+
+static bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
+    if (ep == 0) {
+        /* configuring control endpoint EP0 */
+        uint32_t mpsize;
+        if (epsize <= 0x08) {
+            epsize = 0x08;
+            mpsize = 0x03;
+        } else if (epsize <= 0x10) {
+            epsize = 0x10;
+            mpsize = 0x02;
+        } else if (epsize <= 0x20) {
+            epsize = 0x20;
+            mpsize = 0x01;
+        } else {
+            epsize = 0x40;
+            mpsize = 0x00;
+        }
+        /* EP0 TX FIFO size is setted on init level */
+        /* enabling RX and TX interrupts from EP0 */
+        OTGD->DAINTMSK |= 0x00010001;
+        /* setting up EP0 TX and RX registers */
+        /*EPIN(ep)->DIEPTSIZ  = epsize;*/
+        EPIN(ep)->DIEPCTL = mpsize | USB_OTG_DIEPCTL_SNAK;
+        /* 1 setup packet, 1 packets total */
+        EPOUT(ep)->DOEPTSIZ = epsize | (1 << 29) | (1 << 19);
+        EPOUT(ep)->DOEPCTL  = mpsize | USB_OTG_DOEPCTL_EPENA | USB_OTG_DOEPCTL_CNAK;
+        return true;
+    }
+    if (ep & 0x80) {
+        ep &= 0x7F;
+        USB_OTG_INEndpointTypeDef* epi = EPIN(ep);
+        /* configuring TX endpoint */
+        /* setting up TX fifo and size register */
+        if (eptype & USB_EPTYPE_DBLBUF) {
+            if (!set_tx_fifo(ep, epsize << 1))
+                return false;
+        } else {
+            if (!set_tx_fifo(ep, epsize))
+                return false;
+        }
+        /* enabling EP TX interrupt */
+        OTGD->DAINTMSK |= (0x0001UL << ep);
+        /* setting up TX control register*/
+        switch (eptype) {
+        case USB_EPTYPE_ISOCHRONUS:
+        case USB_EPTYPE_ISOCHRONUS | USB_EPTYPE_DBLBUF:
+            epi->DIEPCTL = (0x01 << 18) | USB_OTG_DIEPCTL_USBAEP | USB_OTG_DIEPCTL_SD0PID_SEVNFRM | (ep << 22) | epsize;
+            break;
+        case USB_EPTYPE_BULK:
+        case USB_EPTYPE_BULK | USB_EPTYPE_DBLBUF:
+            epi->DIEPCTL = USB_OTG_DIEPCTL_SNAK | USB_OTG_DIEPCTL_USBAEP | (0x02 << 18) |
+                           USB_OTG_DIEPCTL_SD0PID_SEVNFRM | (ep << 22) | epsize;
+            break;
+        default:
+            epi->DIEPCTL = USB_OTG_DIEPCTL_SNAK | USB_OTG_DIEPCTL_USBAEP | (0x03 << 18) |
+                           USB_OTG_DIEPCTL_SD0PID_SEVNFRM | (ep << 22) | epsize;
+            break;
+        }
+    } else {
+        /* configuring RX endpoint */
+        USB_OTG_OUTEndpointTypeDef* epo = EPOUT(ep);
+        /* setting up RX control register */
+        switch (eptype) {
+        case USB_EPTYPE_ISOCHRONUS:
+        case USB_EPTYPE_ISOCHRONUS | USB_EPTYPE_DBLBUF:
+            epo->DOEPCTL = USB_OTG_DOEPCTL_CNAK | USB_OTG_DOEPCTL_EPENA | USB_OTG_DOEPCTL_USBAEP | (0x01 << 18) |
+                           epsize;
+            break;
+        case USB_EPTYPE_BULK | USB_EPTYPE_DBLBUF:
+        case USB_EPTYPE_BULK:
+            epo->DOEPCTL = USB_OTG_DOEPCTL_SD0PID_SEVNFRM | USB_OTG_DOEPCTL_CNAK | USB_OTG_DOEPCTL_EPENA |
+                           USB_OTG_DOEPCTL_USBAEP | (0x02 << 18) | epsize;
+            break;
+        default:
+            epo->DOEPCTL = USB_OTG_DOEPCTL_SD0PID_SEVNFRM | USB_OTG_DOEPCTL_CNAK | USB_OTG_DOEPCTL_EPENA |
+                           USB_OTG_DOEPCTL_USBAEP | (0x03 << 18) | epsize;
+            break;
+        }
+    }
+    return true;
+}
+
+static void ep_deconfig(uint8_t ep) {
+    ep &= 0x7F;
+    volatile USB_OTG_INEndpointTypeDef* epi  = EPIN(ep);
+    volatile USB_OTG_OUTEndpointTypeDef* epo = EPOUT(ep);
+    /* deconfiguring TX part */
+    /* disable interrupt */
+    OTGD->DAINTMSK &= ~(0x10001 << ep);
+    /* decativating endpoint */
+    _BCL(epi->DIEPCTL, USB_OTG_DIEPCTL_USBAEP);
+    /* flushing FIFO */
+    Flush_TX(ep);
+    /* disabling endpoint */
+    if ((epi->DIEPCTL & USB_OTG_DIEPCTL_EPENA) && (ep != 0)) {
+        epi->DIEPCTL = USB_OTG_DIEPCTL_EPDIS;
+    }
+    /* clean EP interrupts */
+    epi->DIEPINT = 0xFF;
+    /* deconfiguring TX FIFO */
+    if (ep > 0) {
+        OTG->DIEPTXF[ep - 1] = 0x02000200 + 0x200 * ep;
+    }
+    /* deconfigureing RX part */
+    _BCL(epo->DOEPCTL, USB_OTG_DOEPCTL_USBAEP);
+    if ((epo->DOEPCTL & USB_OTG_DOEPCTL_EPENA) && (ep != 0)) {
+        epo->DOEPCTL = USB_OTG_DOEPCTL_EPDIS;
+    }
+    epo->DOEPINT = 0xFF;
+}
+
+static int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
+    uint32_t len, tmp;
+    volatile uint32_t* fifo = EPFIFO(0);
+    /* no data in RX FIFO */
+    if (!(OTG->GINTSTS & USB_OTG_GINTSTS_RXFLVL))
+        return -1;
+    ep &= 0x7F;
+    if ((OTG->GRXSTSR & USB_OTG_GRXSTSP_EPNUM) != ep)
+        return -1;
+    /* pop data from fifo */
+    len = _FLD2VAL(USB_OTG_GRXSTSP_BCNT, OTG->GRXSTSP);
+    for (uint32_t idx = 0; idx < len; idx++) {
+        if ((idx & 0x03) == 0x00) {
+            tmp = *fifo;
+        }
+        if (idx < blen) {
+            ((uint8_t*)buf)[idx] = tmp & 0xFF;
+            tmp >>= 8;
+        }
+    }
+    return (len < blen) ? len : blen;
+}
+
+static int32_t ep_write(uint8_t ep, const void* buf, uint16_t blen) {
+    uint32_t len, tmp;
+    ep &= 0x7F;
+    volatile uint32_t* fifo        = EPFIFO(ep);
+    USB_OTG_INEndpointTypeDef* epi = EPIN(ep);
+    /* transfer data size in 32-bit words */
+    len = (blen + 3) >> 2;
+    /* no enough space in TX fifo */
+    if (len > _FLD2VAL(USB_OTG_DTXFSTS_INEPTFSAV, epi->DTXFSTS))
+        return -1;
+    if (ep != 0 && epi->DIEPCTL & USB_OTG_DIEPCTL_EPENA) {
+        return -1;
+    }
+    _BMD(epi->DIEPTSIZ,
+         USB_OTG_DIEPTSIZ_PKTCNT | USB_OTG_DIEPTSIZ_MULCNT | USB_OTG_DIEPTSIZ_XFRSIZ,
+         _VAL2FLD(USB_OTG_DIEPTSIZ_PKTCNT, 1) | _VAL2FLD(USB_OTG_DIEPTSIZ_MULCNT, 1) |
+             _VAL2FLD(USB_OTG_DIEPTSIZ_XFRSIZ, blen));
+    _BMD(epi->DIEPCTL, USB_OTG_DIEPCTL_STALL, USB_OTG_DOEPCTL_CNAK);
+    _BST(epi->DIEPCTL, USB_OTG_DOEPCTL_EPENA);
+    /* push data to FIFO */
+    tmp = 0;
+    for (int idx = 0; idx < blen; idx++) {
+        tmp |= (uint32_t)((uint8_t*)buf)[idx] << ((idx & 0x03) << 3);
+        if ((idx & 0x03) == 0x03 || (idx + 1) == blen) {
+            *fifo = tmp;
+            tmp   = 0;
+        }
+    }
+    return blen;
+}
+
+static uint16_t get_frame(void) { return _FLD2VAL(USB_OTG_DSTS_FNSOF, OTGD->DSTS); }
+
+static void evt_poll(usbd_device* dev, usbd_evt_callback callback) {
+    uint32_t evt;
+    uint32_t ep = 0;
+    while (1) {
+        uint32_t _t = OTG->GINTSTS;
+        /* bus RESET event */
+        if (_t & USB_OTG_GINTSTS_USBRST) {
+            OTG->GINTSTS = USB_OTG_GINTSTS_USBRST;
+            for (uint8_t i = 0; i < MAX_EP; i++) { ep_deconfig(i); }
+            Flush_RX();
+            continue;
+        } else if (_t & USB_OTG_GINTSTS_ENUMDNE) {
+            OTG->GINTSTS = USB_OTG_GINTSTS_ENUMDNE;
+            evt          = usbd_evt_reset;
+        } else if (_t & USB_OTG_GINTSTS_IEPINT) {
+            for (;; ep++) {
+                USB_OTG_INEndpointTypeDef* epi = EPIN(ep);
+                if (ep >= MAX_EP)
+                    return;
+                if (epi->DIEPINT & USB_OTG_DIEPINT_XFRC) {
+                    _BST(epi->DIEPINT, USB_OTG_DIEPINT_XFRC);
+                    evt = usbd_evt_eptx;
+                    ep |= 0x80;
+                    break;
+                }
+            }
+        } else if (_t & USB_OTG_GINTSTS_RXFLVL) {
+            _t = OTG->GRXSTSR;
+            ep = _t & USB_OTG_GRXSTSP_EPNUM;
+            switch (_FLD2VAL(USB_OTG_GRXSTSP_PKTSTS, _t)) {
+            case 0x02: /* OUT received */
+                evt = usbd_evt_eprx;
+                break;
+            case 0x06: /* SETUP received */
+                /* flushing TX if something stuck in control endpoint */
+                if (EPIN(ep)->DIEPTSIZ & USB_OTG_DIEPTSIZ_PKTCNT) {
+                    Flush_TX(ep);
+                }
+                evt = usbd_evt_epsetup;
+                break;
+            case 0x03: /* OUT completed */
+            case 0x04: /* SETUP completed */
+                _BST(EPOUT(ep)->DOEPCTL, USB_OTG_DOEPCTL_CNAK | USB_OTG_DOEPCTL_EPENA);
+                /* FALLTHRU */
+            default:
+                /* pop GRXSTSP */
+                OTG->GRXSTSP;
+                continue;
+            }
+#if !defined(USBD_SOF_DISABLED)
+        } else if (_t & USB_OTG_GINTSTS_SOF) {
+            OTG->GINTSTS = USB_OTG_GINTSTS_SOF;
+            evt          = usbd_evt_sof;
+#endif
+        } else if (_t & USB_OTG_GINTSTS_USBSUSP) {
+            evt          = usbd_evt_susp;
+            OTG->GINTSTS = USB_OTG_GINTSTS_USBSUSP;
+        } else if (_t & USB_OTG_GINTSTS_WKUINT) {
+            OTG->GINTSTS = USB_OTG_GINTSTS_WKUINT;
+            evt          = usbd_evt_wkup;
+        } else if (_t & USB_OTG_GINTSTS_OEPINT) {
+            for (;; ep++) {
+                USB_OTG_OUTEndpointTypeDef* epi = EPOUT(ep);
+                if (ep >= MAX_EP)
+                    break;
+                if (epi->DOEPINT & USB_OTG_DOEPINT_XFRC) {
+                    epi->DOEPINT = USB_OTG_DOEPINT_XFRC;
+                    break;
+                } else if (epi->DOEPINT & USB_OTG_DOEPINT_STUP) {
+                    epi->DOEPINT = USB_OTG_DOEPINT_STUP;
+                    break;
+                } else if (epi->DOEPINT & USB_OTG_DOEPINT_OTEPDIS) {
+                    epi->DOEPINT = USB_OTG_DOEPINT_OTEPDIS;
+                    break;
+                }
+            }
+            continue;
+        } else if (_t & USB_OTG_GINTSTS_IISOIXFR) {
+            for (;; ep++) {
+                USB_OTG_INEndpointTypeDef* epi = EPIN(ep);
+                if (ep >= MAX_EP)
+                    break;
+                uint32_t diepctl = epi->DIEPCTL;
+                if (((diepctl & USB_OTG_DIEPCTL_EPTYP) == USB_OTG_DIEPCTL_EPTYP_0) &&
+                    ((diepctl & USB_OTG_DIEPCTL_EPENA) != 0)) {
+                    epi->DIEPCTL |= USB_OTG_DIEPCTL_EPDIS;
+                    break;
+                }
+            }
+            OTG->GINTSTS = USB_OTG_GINTSTS_IISOIXFR;
+            return;
+        } else if (_t & USB_OTG_GINTSTS_PXFR_INCOMPISOOUT) {
+            OTG->GINTSTS = USB_OTG_GINTSTS_PXFR_INCOMPISOOUT;
+            return;
+        } else if (_t & USB_OTG_GINTSTS_EOPF) {
+            for (;; ep++) {
+                USB_OTG_INEndpointTypeDef* epi  = EPIN(ep);
+                USB_OTG_OUTEndpointTypeDef* epo = EPOUT(ep);
+                if (ep >= MAX_EP)
+                    break;
+                if ((epo->DOEPCTL & USB_OTG_DOEPCTL_EPTYP) == USB_OTG_DOEPCTL_EPTYP_0) {
+                    /* isochronous OUT endpoint */
+                    if (get_frame() & 1) {
+                        _BST(epo->DOEPCTL, USB_OTG_DOEPCTL_SD0PID_SEVNFRM);
+                    } else {
+                        _BST(epo->DOEPCTL, USB_OTG_DOEPCTL_SODDFRM);
+                    }
+                } else if ((epi->DIEPCTL & USB_OTG_DIEPCTL_EPTYP) == USB_OTG_DIEPCTL_EPTYP_0) {
+                    /* isochronous IN endpoint */
+                    if (get_frame() & 1) {
+                        _BST(epi->DIEPCTL, USB_OTG_DIEPCTL_SD0PID_SEVNFRM);
+                    } else {
+                        _BST(epi->DIEPCTL, USB_OTG_DIEPCTL_SODDFRM);
+                    }
+                }
+            }
+            OTG->GINTSTS = USB_OTG_GINTSTS_EOPF;
+            return;
+        } else {
+            /* no more supported events */
+            return;
+        }
+        callback(dev, evt, ep);
+        return;
+    }
+}
+
+static uint32_t fnv1a32_turn(uint32_t fnv, uint32_t data) {
+    for (int i = 0; i < 4; i++) {
+        fnv ^= (data & 0xFF);
+        fnv *= 16777619;
+        data >>= 8;
+    }
+    return fnv;
+}
+
+static uint16_t get_serialno_desc(void* buffer) {
+    struct usb_string_descriptor* dsc = buffer;
+    uint16_t* str                     = dsc->wString;
+    uint32_t fnv                      = 2166136261;
+    fnv                               = fnv1a32_turn(fnv, *(uint32_t*)(UID_BASE + 0x00));
+    fnv                               = fnv1a32_turn(fnv, *(uint32_t*)(UID_BASE + 0x04));
+    fnv                               = fnv1a32_turn(fnv, *(uint32_t*)(UID_BASE + 0x08));
+    for (int i = 28; i >= 0; i -= 4) {
+        uint16_t c = (fnv >> i) & 0x0F;
+        c += (c < 10) ? '0' : ('A' - 10);
+        *str++ = c;
+    }
+    dsc->bDescriptorType = USB_DTYPE_STRING;
+    dsc->bLength         = 18;
+    return 18;
+}
+
+const struct usbd_driver usbd_otghs = {
+    getinfo,
+    enable,
+    connect,
+    setaddr,
+    ep_config,
+    ep_deconfig,
+    ep_read,
+    ep_write,
+    ep_setstall,
+    ep_isstalled,
+    evt_poll,
+    get_frame,
+    get_serialno_desc,
+};
+
+#endif
\ No newline at end of file