text: /* 
   * The MIT License (MIT)
   *
   * Copyright (c) 2018, hathach (tinyusb.org)
   *
   * 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.
   *
   * This file is part of the TinyUSB stack.
   */
  
  #include "bsp/board.h"
  #include "board.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"
  
  // needed by fsl_flexspi_nor_boot
  const uint8_t dcd_data[] = { 0x00 };
  
  void board_init(void)
  {
    // Init clock
    BOARD_BootClockRUN();
    SystemCoreClockUpdate();
  
    // Enable IOCON clock
    CLOCK_EnableClock(kCLOCK_Iomuxc);
  
  #if CFG_TUSB_OS == OPT_OS_NONE
    // 1ms tick timer
    SysTick_Config(SystemCoreClock / 1000);
  #elif CFG_TUSB_OS == OPT_OS_FREERTOS
    // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
  //  NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
  #endif
  
    // LED
    IOMUXC_SetPinMux( LED_PINMUX, 0U);
    IOMUXC_SetPinConfig( LED_PINMUX, 0x10B0U);
  
    gpio_pin_config_t led_config = { kGPIO_DigitalOutput, 0, kGPIO_NoIntmode };
    GPIO_PinInit(LED_PORT, LED_PIN, &led_config);
    board_led_write(true);
  
    // Button
    IOMUXC_SetPinMux( BUTTON_PINMUX, 0U);
    IOMUXC_SetPinConfig(BUTTON_PINMUX, 0x01B0A0U);
    gpio_pin_config_t button_config = { kGPIO_DigitalInput, 0, kGPIO_IntRisingEdge, };
    GPIO_PinInit(BUTTON_PORT, BUTTON_PIN, &button_config);
  
    // UART
    IOMUXC_SetPinMux( UART_TX_PINMUX, 0U);
    IOMUXC_SetPinMux( UART_RX_PINMUX, 0U);
    IOMUXC_SetPinConfig( UART_TX_PINMUX, 0x10B0u);
    IOMUXC_SetPinConfig( UART_RX_PINMUX, 0x10B0u);
  
    lpuart_config_t uart_config;
    LPUART_GetDefaultConfig(&uart_config);
    uart_config.baudRate_Bps = CFG_BOARD_UART_BAUDRATE;
    uart_config.enableTx = true;
    uart_config.enableRx = true;
  
    uint32_t freq;
    if (CLOCK_GetMux(kCLOCK_UartMux) == 0) /* PLL3 div6 80M */
    {
      freq = (CLOCK_GetPllFreq(kCLOCK_PllUsb1) / 6U) / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U);
    }
    else
    {
      freq = CLOCK_GetOscFreq() / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U);
    }
  
    LPUART_Init(UART_PORT, &uart_config, freq);
  
    //------------- USB0 -------------//
  
    // Clock
    CLOCK_EnableUsbhs0PhyPllClock(kCLOCK_Usbphy480M, 480000000U);
    CLOCK_EnableUsbhs0Clock(kCLOCK_Usb480M, 480000000U);
  
    USBPHY_Type* usb_phy;
  
    // RT105x RT106x have dual USB controller.
  #ifdef USBPHY1
    usb_phy = USBPHY1;
  #else
    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;
  
    // RT105x RT106x have dual USB controller.
  #ifdef USBPHY2
    // USB1
    CLOCK_EnableUsbhs1PhyPllClock(kCLOCK_Usbphy480M, 480000000U);
    CLOCK_EnableUsbhs1Clock(kCLOCK_Usb480M, 480000000U);
  
    usb_phy = USBPHY2;
  
    // 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
    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;
  #endif
  }
  
  //--------------------------------------------------------------------+
  // USB Interrupt Handler
  //--------------------------------------------------------------------+
  void USB_OTG1_IRQHandler(void)
  {
    #if CFG_TUSB_RHPORT0_MODE & OPT_MODE_HOST
      tuh_int_handler(0);
    #endif
  
    #if CFG_TUSB_RHPORT0_MODE & OPT_MODE_DEVICE
      tud_int_handler(0);
    #endif
  }
  
  void USB_OTG2_IRQHandler(void)
  {
    #if CFG_TUSB_RHPORT1_MODE & OPT_MODE_HOST
      tuh_int_handler(1);
    #endif
  
    #if CFG_TUSB_RHPORT1_MODE & OPT_MODE_DEVICE
      tud_int_handler(1);
    #endif
  }
  
  //--------------------------------------------------------------------+
  // Board porting API
  //--------------------------------------------------------------------+
  
  void board_led_write(bool state)
  {
    GPIO_PinWrite(LED_PORT, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
  }
  
  uint32_t board_button_read(void)
  {
    // active low
    return BUTTON_STATE_ACTIVE == GPIO_PinRead(BUTTON_PORT, BUTTON_PIN);
  }
  
  int board_uart_read(uint8_t* buf, int len)
  {
    LPUART_ReadBlocking(UART_PORT, buf, len);
    return len;
  }
  
  int board_uart_write(void const * buf, int len)
  {
    LPUART_WriteBlocking(UART_PORT, (uint8_t const*)buf, len);
    return len;
  }
  
  #if CFG_TUSB_OS == OPT_OS_NONE
  volatile uint32_t system_ticks = 0;
  void SysTick_Handler(void)
  {
    system_ticks++;
  }
  
  uint32_t board_millis(void)
  {
    return system_ticks;
  }
  #endif
  