text: /*
   * This file is part of the MicroPython project, http://micropython.org/
   *
   * Based on tinyusb/hw/bsp/teensy_40/teensy40.c
   *
   * The MIT License (MIT)
   *
   * Copyright (c) 2018, hathach (tinyusb.org)
   * Copyright (c) 2020, Jim Mussared
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  #include "py/runtime.h"
  
  #include "tusb.h"
  
  #include "fsl_device_registers.h"
  #include "fsl_gpio.h"
  #include "fsl_iomuxc.h"
  #include "fsl_clock.h"
  #include "fsl_lpuart.h"
  
  #include "clock_config.h"
  
  #define LED_STATE_ON (0)
  
  volatile uint32_t systick_ms = 0;
  
  const uint8_t dcd_data[] = { 0x00 };
  
  void board_init(void) {
      // Init clock
      BOARD_BootClockRUN();
      SystemCoreClockUpdate();
  
      // Enable IOCON clock
      CLOCK_EnableClock(kCLOCK_Iomuxc);
  
      // 1ms tick timer
      SysTick_Config(SystemCoreClock / 1000);
  
      // ------------- USB0 ------------- //
  
      // Clock
      CLOCK_EnableUsbhs0PhyPllClock(kCLOCK_Usbphy480M, 480000000U);
      CLOCK_EnableUsbhs0Clock(kCLOCK_Usb480M, 480000000U);
  
      #ifdef USBPHY1
      USBPHY_Type *usb_phy = USBPHY1;
      #else
      USBPHY_Type *usb_phy = USBPHY;
      #endif
  
      // Enable PHY support for Low speed device + LS via FS Hub
      usb_phy->CTRL |= USBPHY_CTRL_SET_ENUTMILEVEL2_MASK | USBPHY_CTRL_SET_ENUTMILEVEL3_MASK;
  
      // Enable all power for normal operation
      usb_phy->PWD = 0;
  
      // TX Timing
      uint32_t phytx = usb_phy->TX;
      phytx &= ~(USBPHY_TX_D_CAL_MASK | USBPHY_TX_TXCAL45DM_MASK | USBPHY_TX_TXCAL45DP_MASK);
      phytx |= USBPHY_TX_D_CAL(0x0C) | USBPHY_TX_TXCAL45DP(0x06) | USBPHY_TX_TXCAL45DM(0x06);
      usb_phy->TX = phytx;
  
      // USB1
      //  CLOCK_EnableUsbhs1PhyPllClock(kCLOCK_Usbphy480M, 480000000U);
      //  CLOCK_EnableUsbhs1Clock(kCLOCK_Usb480M, 480000000U);
  }
  
  void SysTick_Handler(void) {
      systick_ms++;
  }
  
  void USB_OTG1_IRQHandler(void) {
      tud_int_handler(0);
      tud_task();
      __SEV();
  }
  
  void USB_OTG2_IRQHandler(void) {
      tud_int_handler(1);
      tud_task();
      __SEV();
  }
  