#ifndef OneWire_Direct_GPIO_h
  #define OneWire_Direct_GPIO_h

  // This header should ONLY be included by OneWire.cpp.  These defines are
  // meant to be private, used within OneWire.cpp, but not exposed to Arduino
  // sketches or other libraries which may include OneWire.h.

  #include <stdint.h>

  // Platform specific I/O definitions

  #if defined(__AVR__)
    #define PIN_TO_BASEREG(pin)             (portInputRegister(digitalPinToPort(pin)))
    #define PIN_TO_BITMASK(pin)             (digitalPinToBitMask(pin))
    #define IO_REG_TYPE uint8_t
    #define IO_REG_BASE_ATTR asm("r30")
    #define IO_REG_MASK_ATTR
    #if defined(__AVR_ATmega4809__)
      #define DIRECT_READ(base, mask)         (((*(base)) & (mask)) ? 1 : 0)
      #define DIRECT_MODE_INPUT(base, mask)   ((*((base)-8)) &= ~(mask))
      #define DIRECT_MODE_OUTPUT(base, mask)  ((*((base)-8)) |= (mask))
      #define DIRECT_WRITE_LOW(base, mask)    ((*((base)-4)) &= ~(mask))
      #define DIRECT_WRITE_HIGH(base, mask)   ((*((base)-4)) |= (mask))
    #else
      #define DIRECT_READ(base, mask)         (((*(base)) & (mask)) ? 1 : 0)
      #define DIRECT_MODE_INPUT(base, mask)   ((*((base)+1)) &= ~(mask))
      #define DIRECT_MODE_OUTPUT(base, mask)  ((*((base)+1)) |= (mask))
      #define DIRECT_WRITE_LOW(base, mask)    ((*((base)+2)) &= ~(mask))
      #define DIRECT_WRITE_HIGH(base, mask)   ((*((base)+2)) |= (mask))
    #endif

  #elif defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MK66FX1M0__) || defined(__MK64FX512__)
    #define PIN_TO_BASEREG(pin)             (portOutputRegister(pin))
    #define PIN_TO_BITMASK(pin)             (1)
    #define IO_REG_TYPE uint8_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR __attribute__ ((unused))
    #define DIRECT_READ(base, mask)         (*((base)+512))
    #define DIRECT_MODE_INPUT(base, mask)   (*((base)+640) = 0)
    #define DIRECT_MODE_OUTPUT(base, mask)  (*((base)+640) = 1)
    #define DIRECT_WRITE_LOW(base, mask)    (*((base)+256) = 1)
    #define DIRECT_WRITE_HIGH(base, mask)   (*((base)+128) = 1)

  #elif defined(__MKL26Z64__)
    #define PIN_TO_BASEREG(pin)             (portOutputRegister(pin))
    #define PIN_TO_BITMASK(pin)             (digitalPinToBitMask(pin))
    #define IO_REG_TYPE uint8_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, mask)         ((*((base)+16) & (mask)) ? 1 : 0)
    #define DIRECT_MODE_INPUT(base, mask)   (*((base)+20) &= ~(mask))
    #define DIRECT_MODE_OUTPUT(base, mask)  (*((base)+20) |= (mask))
    #define DIRECT_WRITE_LOW(base, mask)    (*((base)+8) = (mask))
    #define DIRECT_WRITE_HIGH(base, mask)   (*((base)+4) = (mask))

  #elif defined(__IMXRT1052__) || defined(__IMXRT1062__)
    #define PIN_TO_BASEREG(pin)             (portOutputRegister(pin))
    #define PIN_TO_BITMASK(pin)             (digitalPinToBitMask(pin))
    #define IO_REG_TYPE uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, mask)         ((*((base)+2) & (mask)) ? 1 : 0)
    #define DIRECT_MODE_INPUT(base, mask)   (*((base)+1) &= ~(mask))
    #define DIRECT_MODE_OUTPUT(base, mask)  (*((base)+1) |= (mask))
    #define DIRECT_WRITE_LOW(base, mask)    (*((base)+34) = (mask))
    #define DIRECT_WRITE_HIGH(base, mask)   (*((base)+33) = (mask))

  #elif defined(__SAM3X8E__) || defined(__SAM3A8C__) || defined(__SAM3A4C__)
    // Arduino 1.5.1 may have a bug in delayMicroseconds() on Arduino Due.
    // http://arduino.cc/forum/index.php/topic,141030.msg1076268.html#msg1076268
    // If you have trouble with OneWire on Arduino Due, please check the
    // status of delayMicroseconds() before reporting a bug in OneWire!
    #define PIN_TO_BASEREG(pin)             (&(digitalPinToPort(pin)->PIO_PER))
    #define PIN_TO_BITMASK(pin)             (digitalPinToBitMask(pin))
    #define IO_REG_TYPE uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, mask)         (((*((base)+15)) & (mask)) ? 1 : 0)
    #define DIRECT_MODE_INPUT(base, mask)   ((*((base)+5)) = (mask))
    #define DIRECT_MODE_OUTPUT(base, mask)  ((*((base)+4)) = (mask))
    #define DIRECT_WRITE_LOW(base, mask)    ((*((base)+13)) = (mask))
    #define DIRECT_WRITE_HIGH(base, mask)   ((*((base)+12)) = (mask))
    #ifndef PROGMEM
      #define PROGMEM
    #endif
    #ifndef pgm_read_byte
      #define pgm_read_byte(addr) (*(const uint8_t *)(addr))
    #endif

  #elif defined(__PIC32MX__)
    #define PIN_TO_BASEREG(pin)             (portModeRegister(digitalPinToPort(pin)))
    #define PIN_TO_BITMASK(pin)             (digitalPinToBitMask(pin))
    #define IO_REG_TYPE uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, mask)         (((*(base+4)) & (mask)) ? 1 : 0)  //PORTX + 0x10
    #define DIRECT_MODE_INPUT(base, mask)   ((*(base+2)) = (mask))            //TRISXSET + 0x08
    #define DIRECT_MODE_OUTPUT(base, mask)  ((*(base+1)) = (mask))            //TRISXCLR + 0x04
    #define DIRECT_WRITE_LOW(base, mask)    ((*(base+8+1)) = (mask))          //LATXCLR  + 0x24
    #define DIRECT_WRITE_HIGH(base, mask)   ((*(base+8+2)) = (mask))          //LATXSET + 0x28

  #elif defined(ARDUINO_ARCH_ESP8266)
    // Special note: I depend on the ESP community to maintain these definitions and
    // submit good pull requests.  I can not answer any ESP questions or help you
    // resolve any problems related to ESP chips.  Please do not contact me and please
    // DO NOT CREATE GITHUB ISSUES for ESP support.  All ESP questions must be asked
    // on ESP community forums.
    #define PIN_TO_BASEREG(pin)             ((volatile uint32_t*) GPO)
    #define PIN_TO_BITMASK(pin)             (1UL << (pin))
    #define IO_REG_TYPE uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR

    static inline __attribute__((always_inline))
    void directModeInput(IO_REG_TYPE mask)
      { if(mask > 0x8000)
          { GP16FFS(GPFFS_GPIO(16));
            GPC16 = 0;
            GP16E &= ~1;
          }
        else
          { GPE &= ~(mask); }
      } // directModeInput

    static inline __attribute__((always_inline))
    void directModeOutput(IO_REG_TYPE mask)
      { if(mask > 0x8000)
          { GP16FFS(GPFFS_GPIO(16));
            GPC16 = 0;
            GP16E |= 1;
          }
        else
          { GPE |= (mask); }
      } // directModeOutput

    static inline __attribute__((always_inline))
    bool directRead(IO_REG_TYPE mask)
      { if(mask > 0x8000)
          { return GP16I & 0x01; }
        else
          { return ((GPI & (mask)) ? true : false); }
      } // directRead

    #define DIRECT_READ(base, mask)             directRead(mask)
    #define DIRECT_MODE_INPUT(base, mask)       directModeInput(mask)
    #define DIRECT_MODE_OUTPUT(base, mask)      directModeOutput(mask)
    #define DIRECT_WRITE_LOW(base, mask)    (mask > 0x8000) ? GP16O &= ~1 : (GPOC = (mask))
    #define DIRECT_WRITE_HIGH(base, mask)   (mask > 0x8000) ? GP16O |= 1 : (GPOS = (mask))

  #elif defined(ARDUINO_ARCH_ESP32)
    #include <driver/rtc_io.h>
    #include <soc/gpio_struct.h>
    #define PIN_TO_BASEREG(pin)             (0)
    #define PIN_TO_BITMASK(pin)             (pin)
    #define IO_REG_TYPE uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR

    static inline __attribute__((always_inline))
    IO_REG_TYPE directRead(IO_REG_TYPE pin)
      {
        #if CONFIG_IDF_TARGET_ESP32C3
           return (GPIO.in.val >> pin) & 0x1;
        #else // plain ESP32
           if ( pin < 32 )
             { return (GPIO.in >> pin) & 0x1; }
           else if ( pin < 46 )
             { return (GPIO.in1.val >> (pin - 32)) & 0x1; }
        #endif

        return 0;
      } // directRead

    static inline __attribute__((always_inline))
    void directWriteLow(IO_REG_TYPE pin)
      {
        #if CONFIG_IDF_TARGET_ESP32C3
           GPIO.out_w1tc.val = ((uint32_t)1 << pin);
        #else // plain ESP32
           if ( pin < 32 )
             { GPIO.out_w1tc = ((uint32_t)1 << pin); }
           else if ( pin < 46 )
             { GPIO.out1_w1tc.val = ((uint32_t)1 << (pin - 32)); }
        #endif
      } // directWriteLow

    static inline __attribute__((always_inline))
    void directWriteHigh(IO_REG_TYPE pin)
      {
        #if CONFIG_IDF_TARGET_ESP32C3
            GPIO.out_w1ts.val = ((uint32_t)1 << pin);
        #else // plain ESP32
           if ( pin < 32 )
             { GPIO.out_w1ts = ((uint32_t)1 << pin); }
           else if ( pin < 46 )
             { GPIO.out1_w1ts.val = ((uint32_t)1 << (pin - 32)); }
        #endif
      } // directWriteHigh

    static inline __attribute__((always_inline))
    void directModeInput(IO_REG_TYPE pin)
      {
        #if CONFIG_IDF_TARGET_ESP32C3
          GPIO.enable_w1tc.val = ((uint32_t)1 << (pin));
        #else
          if ( digitalPinIsValid(pin) )
            {
              #if ESP_IDF_VERSION_MAJOR < 4      // IDF 3.x ESP32/PICO-D4
                uint32_t rtc_reg(rtc_gpio_desc[pin].reg);

                if ( rtc_reg ) // RTC pins PULL settings
                  { ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].mux);
                    ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].pullup | rtc_gpio_desc[pin].pulldown);
                  }
              #endif
              // Input
              if ( pin < 32 )
                { GPIO.enable_w1tc = ((uint32_t)1 << pin); }
              else
                { GPIO.enable1_w1tc.val = ((uint32_t)1 << (pin - 32)); }
            }
        #endif
      } // directModeInput

    static inline __attribute__((always_inline))
    void directModeOutput(IO_REG_TYPE pin)
      {
        #if CONFIG_IDF_TARGET_ESP32C3
          GPIO.enable_w1ts.val = ((uint32_t)1 << (pin));
        #else
          if ( digitalPinIsValid(pin) && pin <= 33 ) // pins above 33 can be only inputs
            {
              #if ESP_IDF_VERSION_MAJOR < 4      // IDF 3.x ESP32/PICO-D4
                uint32_t rtc_reg(rtc_gpio_desc[pin].reg);

                if ( rtc_reg ) // RTC pins PULL settings
                  { ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].mux);
                    ESP_REG(rtc_reg) = ESP_REG(rtc_reg) & ~(rtc_gpio_desc[pin].pullup | rtc_gpio_desc[pin].pulldown);
                  }
              #endif
             // Output
             if ( pin < 32 )
               { GPIO.enable_w1ts = ((uint32_t)1 << pin); }
             else // already validated to pins <= 33
               { GPIO.enable1_w1ts.val = ((uint32_t)1 << (pin - 32)); }
            }
        #endif
      } // directModeOutput

    #define DIRECT_READ(base, pin)          directRead(pin)
    #define DIRECT_WRITE_LOW(base, pin)     directWriteLow(pin)
    #define DIRECT_WRITE_HIGH(base, pin)    directWriteHigh(pin)
    #define DIRECT_MODE_INPUT(base, pin)    directModeInput(pin)
    #define DIRECT_MODE_OUTPUT(base, pin)   directModeOutput(pin)
    // https://github.com/PaulStoffregen/OneWire/pull/47
    // https://github.com/stickbreaker/OneWire/commit/6eb7fc1c11a15b6ac8c60e5671cf36eb6829f82c
    #ifdef  interrupts
      #undef  interrupts
    #endif
    #ifdef  noInterrupts
      #undef  noInterrupts
    #endif
    #define noInterrupts() {portMUX_TYPE mux = portMUX_INITIALIZER_UNLOCKED;portENTER_CRITICAL(&mux)
    #define interrupts() portEXIT_CRITICAL(&mux);}
    //#warning "ESP32 OneWire testing"

  #elif defined(ARDUINO_ARCH_STM32)
    #define PIN_TO_BASEREG(pin)             (0)
    #define PIN_TO_BITMASK(pin)             ((uint32_t)digitalPinToPinName(pin))
    #define IO_REG_TYPE uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, pin)          digitalReadFast((PinName)pin)
    #define DIRECT_WRITE_LOW(base, pin)     digitalWriteFast((PinName)pin, LOW)
    #define DIRECT_WRITE_HIGH(base, pin)    digitalWriteFast((PinName)pin, HIGH)
    #define DIRECT_MODE_INPUT(base, pin)    pin_function((PinName)pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0))
    #define DIRECT_MODE_OUTPUT(base, pin)   pin_function((PinName)pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0))

  #elif defined(__SAMD21G18A__)
    #define PIN_TO_BASEREG(pin)             portModeRegister(digitalPinToPort(pin))
    #define PIN_TO_BITMASK(pin)             (digitalPinToBitMask(pin))
    #define IO_REG_TYPE uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, mask)         (((*((base)+8)) & (mask)) ? 1 : 0)
    #define DIRECT_MODE_INPUT(base, mask)   ((*((base)+1)) = (mask))
    #define DIRECT_MODE_OUTPUT(base, mask)  ((*((base)+2)) = (mask))
    #define DIRECT_WRITE_LOW(base, mask)    ((*((base)+5)) = (mask))
    #define DIRECT_WRITE_HIGH(base, mask)   ((*((base)+6)) = (mask))

  #elif defined(__ASR6501__)
    #define PIN_IN_PORT(pin)    (pin % PIN_NUMBER_IN_PORT)
    #define PORT_FROM_PIN(pin)  (pin / PIN_NUMBER_IN_PORT)
    #define PORT_OFFSET(port)   (PORT_REG_SHFIT * port)
    #define PORT_ADDRESS(pin)   (CYDEV_GPIO_BASE + PORT_OFFSET(PORT_FROM_PIN(pin)))

    #define PIN_TO_BASEREG(pin)             (0)
    #define PIN_TO_BITMASK(pin)             (pin)
    #define IO_REG_TYPE uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, pin)          CY_SYS_PINS_READ_PIN(PORT_ADDRESS(pin)+4, PIN_IN_PORT(pin))
    #define DIRECT_WRITE_LOW(base, pin)     CY_SYS_PINS_CLEAR_PIN(PORT_ADDRESS(pin), PIN_IN_PORT(pin))
    #define DIRECT_WRITE_HIGH(base, pin)    CY_SYS_PINS_SET_PIN(PORT_ADDRESS(pin), PIN_IN_PORT(pin))
    #define DIRECT_MODE_INPUT(base, pin)    CY_SYS_PINS_SET_DRIVE_MODE(PORT_ADDRESS(pin)+8, PIN_IN_PORT(pin), CY_SYS_PINS_DM_DIG_HIZ)
    #define DIRECT_MODE_OUTPUT(base, pin)   CY_SYS_PINS_SET_DRIVE_MODE(PORT_ADDRESS(pin)+8, PIN_IN_PORT(pin), CY_SYS_PINS_DM_STRONG)

  #elif defined(RBL_NRF51822)
    #define PIN_TO_BASEREG(pin)             (0)
    #define PIN_TO_BITMASK(pin)             (pin)
    #define IO_REG_TYPE uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, pin)          nrf_gpio_pin_read(pin)
    #define DIRECT_WRITE_LOW(base, pin)     nrf_gpio_pin_clear(pin)
    #define DIRECT_WRITE_HIGH(base, pin)    nrf_gpio_pin_set(pin)
    #define DIRECT_MODE_INPUT(base, pin)    nrf_gpio_cfg_input(pin, NRF_GPIO_PIN_NOPULL)
    #define DIRECT_MODE_OUTPUT(base, pin)   nrf_gpio_cfg_output(pin)

  #elif defined(__arc__) /* Arduino101/Genuino101 specifics */

    #include "scss_registers.h"
    #include "portable.h"
    #include "avr/pgmspace.h"

    #define GPIO_ID(pin)			(g_APinDescription[pin].ulGPIOId)
    #define GPIO_TYPE(pin)			(g_APinDescription[pin].ulGPIOType)
    #define GPIO_BASE(pin)			(g_APinDescription[pin].ulGPIOBase)
    #define DIR_OFFSET_SS			0x01
    #define DIR_OFFSET_SOC			0x04
    #define EXT_PORT_OFFSET_SS		0x0A
    #define EXT_PORT_OFFSET_SOC		0x50

    /* GPIO registers base address */
    #define PIN_TO_BASEREG(pin)		((volatile uint32_t *)g_APinDescription[pin].ulGPIOBase)
    #define PIN_TO_BITMASK(pin)		pin
    #define IO_REG_TYPE			uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR

    static inline __attribute__((always_inline))
    IO_REG_TYPE directRead(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
      { IO_REG_TYPE ret;
        if (SS_GPIO == GPIO_TYPE(pin))
          { ret = READ_ARC_REG(((IO_REG_TYPE)base + EXT_PORT_OFFSET_SS)); }
        else
          { ret = MMIO_REG_VAL_FROM_BASE((IO_REG_TYPE)base, EXT_PORT_OFFSET_SOC); }
        return ((ret >> GPIO_ID(pin)) & 0x01);
      } // directRead

    static inline __attribute__((always_inline))
    void directModeInput(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
      { if (SS_GPIO == GPIO_TYPE(pin))
          { WRITE_ARC_REG(READ_ARC_REG((((IO_REG_TYPE)base) + DIR_OFFSET_SS)) & ~(0x01 << GPIO_ID(pin)),
                            ((IO_REG_TYPE)(base) + DIR_OFFSET_SS));
          }
        else
          { MMIO_REG_VAL_FROM_BASE((IO_REG_TYPE)base, DIR_OFFSET_SOC) &= ~(0x01 << GPIO_ID(pin)); }
      } // directModeInput

    static inline __attribute__((always_inline))
    void directModeOutput(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
      { if (SS_GPIO == GPIO_TYPE(pin))
          { WRITE_ARC_REG(READ_ARC_REG(((IO_REG_TYPE)(base) + DIR_OFFSET_SS)) | (0x01 << GPIO_ID(pin)),
                            ((IO_REG_TYPE)(base) + DIR_OFFSET_SS));
          }
        else
          { MMIO_REG_VAL_FROM_BASE((IO_REG_TYPE)base, DIR_OFFSET_SOC) |= (0x01 << GPIO_ID(pin)); }
      } // directModeOutput

    static inline __attribute__((always_inline))
    void directWriteLow(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
      { if (SS_GPIO == GPIO_TYPE(pin))
          { WRITE_ARC_REG(READ_ARC_REG(base) & ~(0x01 << GPIO_ID(pin)), base); }
        else
          { MMIO_REG_VAL(base) &= ~(0x01 << GPIO_ID(pin)); }
      } // directWriteLow

    static inline __attribute__((always_inline))
    void directWriteHigh(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
      { if (SS_GPIO == GPIO_TYPE(pin))
          { WRITE_ARC_REG(READ_ARC_REG(base) | (0x01 << GPIO_ID(pin)), base); }
        else
          { MMIO_REG_VAL(base) |= (0x01 << GPIO_ID(pin)); }
      } // directWriteHigh

    #define DIRECT_READ(base, pin)		directRead(base, pin)
    #define DIRECT_MODE_INPUT(base, pin)	directModeInput(base, pin)
    #define DIRECT_MODE_OUTPUT(base, pin)	directModeOutput(base, pin)
    #define DIRECT_WRITE_LOW(base, pin)	directWriteLow(base, pin)
    #define DIRECT_WRITE_HIGH(base, pin)	directWriteHigh(base, pin)

  #elif defined(__riscv)

    /*
     * Tested on highfive1
     *
     * Stable results are achieved operating in the
     * two high speed modes of the highfive1.  It
     * seems to be less reliable in slow mode.
     */
    #define PIN_TO_BASEREG(pin)             (0)
    #define PIN_TO_BITMASK(pin)             digitalPinToBitMask(pin)
    #define IO_REG_TYPE uint32_t
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR

    static inline __attribute__((always_inline))
    IO_REG_TYPE directRead(IO_REG_TYPE mask)
      { return ((GPIO_REG(GPIO_INPUT_VAL) & mask) != 0) ? 1 : 0; }

    static inline __attribute__((always_inline))
    void directModeInput(IO_REG_TYPE mask)
      { GPIO_REG(GPIO_OUTPUT_XOR)  &= ~mask;
        GPIO_REG(GPIO_IOF_EN)      &= ~mask;

        GPIO_REG(GPIO_INPUT_EN)  |=  mask;
        GPIO_REG(GPIO_OUTPUT_EN) &= ~mask;
      } // directModeInput

    static inline __attribute__((always_inline))
    void directModeOutput(IO_REG_TYPE mask)
      { GPIO_REG(GPIO_OUTPUT_XOR)  &= ~mask;
        GPIO_REG(GPIO_IOF_EN)      &= ~mask;

        GPIO_REG(GPIO_INPUT_EN)  &= ~mask;
        GPIO_REG(GPIO_OUTPUT_EN) |=  mask;
      } // directModeOutput

    static inline __attribute__((always_inline))
    void directWriteLow(IO_REG_TYPE mask)
      { GPIO_REG(GPIO_OUTPUT_VAL) &= ~mask; }

    static inline __attribute__((always_inline))
    void directWriteHigh(IO_REG_TYPE mask)
      { GPIO_REG(GPIO_OUTPUT_VAL) |= mask; }

    #define DIRECT_READ(base, mask)          directRead(mask)
    #define DIRECT_WRITE_LOW(base, mask)     directWriteLow(mask)
    #define DIRECT_WRITE_HIGH(base, mask)    directWriteHigh(mask)
    #define DIRECT_MODE_INPUT(base, mask)    directModeInput(mask)
    #define DIRECT_MODE_OUTPUT(base, mask)   directModeOutput(mask)

  #elif defined(__MBED__)

    #include "platform/mbed_critical.h"
    #include "DigitalInOut.h"
    #include <cmsis_os2.h>
    #define PIN_TO_BASEREG(pin)             (0)
    #define PIN_TO_BITMASK(pin)             (new mbed::DigitalInOut(digitalPinToPinName(pin)))
    #define IO_REG_TYPE                     mbed::DigitalInOut*
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, pin)          (*pin)
    #define DIRECT_WRITE_LOW(base, pin)     (*pin = 0)
    #define DIRECT_WRITE_HIGH(base, pin)    (*pin = 1)
    #define DIRECT_MODE_INPUT(base, pin)    (pin->input())
    #define DIRECT_MODE_OUTPUT(base, pin)   (pin->output())
    #undef interrupts
    #undef noInterrupts
    #define noInterrupts()                  osThreadSetPriority(osThreadGetId(), osPriorityRealtime) //core_util_critical_section_enter()
    #define interrupts()                    osThreadSetPriority(osThreadGetId(), osPriorityNormal) //core_util_critical_section_exit()

  #elif defined(ARDUINO_ARCH_MBED_RP2040)|| defined(ARDUINO_ARCH_RP2040)
    #define delayMicroseconds(time)         busy_wait_us(time)
    #define PIN_TO_BASEREG(pin)             (0)
    #define PIN_TO_BITMASK(pin)             (pin)
    #define IO_REG_TYPE unsigned int
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, pin)          digitalRead(pin)
    #define DIRECT_WRITE_LOW(base, pin)     digitalWrite(pin, LOW)
    #define DIRECT_WRITE_HIGH(base, pin)    digitalWrite(pin, HIGH)
    #define DIRECT_MODE_INPUT(base, pin)    pinMode(pin,INPUT)
    #define DIRECT_MODE_OUTPUT(base, pin)   pinMode(pin,OUTPUT)
    #warning "OneWire. RP2040 in Fallback mode. Using API calls for pinMode,digitalRead and digitalWrite."

  #else
    #define PIN_TO_BASEREG(pin)             (0)
    #define PIN_TO_BITMASK(pin)             (pin)
    #define IO_REG_TYPE unsigned int
    #define IO_REG_BASE_ATTR
    #define IO_REG_MASK_ATTR
    #define DIRECT_READ(base, pin)          digitalRead(pin)
    #define DIRECT_WRITE_LOW(base, pin)     digitalWrite(pin, LOW)
    #define DIRECT_WRITE_HIGH(base, pin)    digitalWrite(pin, HIGH)
    #define DIRECT_MODE_INPUT(base, pin)    pinMode(pin,INPUT)
    #define DIRECT_MODE_OUTPUT(base, pin)   pinMode(pin,OUTPUT)
    #warning "OneWire. Fallback mode. Using API calls for pinMode,digitalRead and digitalWrite. Operation of this library is not guaranteed on this architecture."

  #endif // on CPU type

#endif // on OneWire_Direct_GPIO_h
