Sasapea's Lab – What Shall I Do Next ?

投稿済みの下記ライブラリを使いArduinoのライブラリをRaspberry Pi 5 で動作させるためのヘルパーライブラリを作ってみた。

Raspberry Pi 5 のRP1-Chipを使い倒す(GPIO)
Raspberry Pi 5 のSoftware-I2C libraryを作ってみた。
Raspberry Pi 5 のSoftware-SPI libraryを作ってみた。

Arduinoのハードウェアに依存するものは対応できないが標準のGPIO/I2C/SPIのみを使うライブラリなど若干の修正のみで動作するものもあるのでそのさいに必要となる基本機能のみを実装。

次のライブラリは動作検証済み。

【I2C】
3軸磁気センサー QMC5883L ライブラリ

【SPI】
※MAX31856(熱電対)ライブラリを作ってみた。
※MAX31865(PT100)ライブラリを作ってみた。

※SPIライブラリのslave()にてチップセレクト番号(0-n)を指定することで下記ライブラリは必要なくなる。
Arduino用のSPI/TWI共通インターフェース・クラスを作ってみた。

【使い方】

#include <arduino.h>
#include <xxxxxxx.h>  /* arduino library */

int main(int argc, char **argv)
{
  /* 利用開始のための初期化 */
  arduino();

  /* arduino helper class */
  Wire.begin();
  SPI.begin();

　while (1)
  {
    /* arduino helper functions */
    pinMode(...)
    digitalWrite(...)
    digitalRead(...)
    analogWrite(...)
    micros();
    millis();
    delayMicroseconds(...);
    delay(...);
    yield();
  }

  return 0;
}

#include <arduino.h>

#include <xxxxxxx.h> /* arduino library */

int main(int argc, char **argv)

{

/* 利用開始のための初期化 */

arduino();

/* arduino helper class */

Wire.begin();

SPI.begin();

　while (1)

{

/* arduino helper functions */

pinMode(...)

digitalWrite(...)

digitalRead(...)

analogWrite(...)

micros();

millis();

delayMicroseconds(...);

delay(...);

yield();

}

return 0;

}

【ライブラリ】

/*
  arduino.h - Helper library for using Arduino libraries on Raspberry Pi 5

  Copyright (c) 2025 Sasapea's Lab. All right reserved.

  This program is free software: you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation, either version 3 of
  the License, or at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once

#include "rp1-gpio.h"
#include "i2c-gpio.h"
#include "spi-gpio.h"

#define _BV(b) (1 << (b))

inline RP1_GPIO GPIO;
inline TwoWire  Wire(GPIO, 3, 2);            /* for standard I2C pins */
inline SPIClass SPI(GPIO, 11, 10, 9, { 8 }); /* for standard SPI pins */

typedef RP1_GPIO::pin_size_t pin_size_t;

typedef enum
{
  INPUT       = RP1_GPIO::INPUT,
  OUTPUT      = RP1_GPIO::OUTPUT,
  OPEN_DRAIN  = RP1_GPIO::OPEN_DRAIN,
  OPEN_SOURCE = RP1_GPIO::OPEN_SOURCE,
  DISABLE     = RP1_GPIO::DISABLE,
  INPUT_PULLUP,
  INPUT_PULLDOWN,
} PinMode;

typedef enum
{
  LOW    = RP1_GPIO::LOW,
  HIGH   = RP1_GPIO::HIGH,
  TOGGLE = RP1_GPIO::TOGGLE,
  IGNORE = RP1_GPIO::IGNORE,
} PinStatus;

inline bool arduino(void)
{
  return GPIO.begin() != GPIO.CHIP_UNKNOWN;
}

inline void pinMode(pin_size_t pin, PinMode mode, PinStatus value = IGNORE)
{
  switch (mode)
  {
    case INPUT:
      GPIO.setPullUpDown(GPIO.PULL_DISABLE);
      GPIO.pinMode(pin, GPIO.INPUT, (RP1_GPIO::PinStatus)value);
      break;
    case INPUT_PULLUP:
      GPIO.setPullUpDown(GPIO.PULL_UP);
      GPIO.pinMode(pin, GPIO.INPUT, (RP1_GPIO::PinStatus)value);
      break;
    case INPUT_PULLDOWN:
      GPIO.setPullUpDown(GPIO.PULL_DOWN);
      GPIO.pinMode(pin, GPIO.INPUT, (RP1_GPIO::PinStatus)value);
      break;
    case OUTPUT:
      GPIO.pinMode(pin, GPIO.OUTPUT, (RP1_GPIO::PinStatus)value);
      break;
    case OPEN_DRAIN:
      GPIO.setPullUpDown(GPIO.PULL_UP);
      GPIO.pinMode(pin, GPIO.OPEN_DRAIN, (RP1_GPIO::PinStatus)value);
      break;
    case OPEN_SOURCE:
      GPIO.setPullUpDown(GPIO.PULL_DOWN);
      GPIO.pinMode(pin, GPIO.OPEN_SOURCE, (RP1_GPIO::PinStatus)value);
      break;
    case DISABLE:
      GPIO.pinMode(pin, GPIO.DISABLE, (RP1_GPIO::PinStatus)value);
      break;
  }
}

inline void digitalWrite(pin_size_t pin, int value)
{
  GPIO.digitalWrite(pin, (RP1_GPIO::PinStatus)value);
}

inline int digitalRead(pin_size_t pin, bool sync = false)
{
  return GPIO.digitalRead(pin, sync);
}

inline void analogWrite(pin_size_t pin, unsigned long value, unsigned long maxres = 255, unsigned long freq = 1000)
{
  unsigned long range = GPIO.PWM0_FREQ / freq;
  GPIO.analogWrite(pin, range, (unsigned long long)range * (value > maxres ? maxres : value) / maxres);
}

inline unsigned long nanos(void)
{
  return GPIO.nanos();
}

inline unsigned long micros(void)
{
  return GPIO.micros();
}

inline unsigned long millis(void)
{
  return GPIO.millis();
}

inline void delayNanoseconds(unsigned long ns)
{
  GPIO.delayNanoseconds(ns);
}

inline void delayMicroseconds(unsigned long us)
{
  GPIO.delayMicroseconds(us);
}

inline void delay(unsigned long ms)
{
  GPIO.delay(ms);
}

inline void yield(void)
{
  GPIO.yield();
}

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arduino.h - Helper library for using Arduino libraries on Raspberry Pi 5

This program is free software: you can redistribute it and/or

modify it under the terms of the GNU General Public License as

published by the Free Software Foundation, either version 3 of

the License, or at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <https://www.gnu.org/licenses/>.

#pragma once

#include "rp1-gpio.h"

#include "i2c-gpio.h"

#include "spi-gpio.h"

#define _BV(b) (1 << (b))

inline RP1_GPIO GPIO;

inline TwoWire Wire(GPIO, 3, 2); /* for standard I2C pins */

inline SPIClass SPI(GPIO, 11, 10, 9, { 8 }); /* for standard SPI pins */

typedef RP1_GPIO::pin_size_t pin_size_t;

typedef enum

{

INPUT = RP1_GPIO::INPUT,

OUTPUT = RP1_GPIO::OUTPUT,

OPEN_DRAIN = RP1_GPIO::OPEN_DRAIN,

OPEN_SOURCE = RP1_GPIO::OPEN_SOURCE,

DISABLE = RP1_GPIO::DISABLE,

INPUT_PULLUP,

INPUT_PULLDOWN,

} PinMode;

typedef enum

{

LOW = RP1_GPIO::LOW,

HIGH = RP1_GPIO::HIGH,

TOGGLE = RP1_GPIO::TOGGLE,

IGNORE = RP1_GPIO::IGNORE,

} PinStatus;

inline bool arduino(void)

{

return GPIO.begin() != GPIO.CHIP_UNKNOWN;

}

inline void pinMode(pin_size_t pin, PinMode mode, PinStatus value = IGNORE)

{

switch (mode)

{

case INPUT:

GPIO.setPullUpDown(GPIO.PULL_DISABLE);

GPIO.pinMode(pin, GPIO.INPUT, (RP1_GPIO::PinStatus)value);

break;

case INPUT_PULLUP:

GPIO.setPullUpDown(GPIO.PULL_UP);

GPIO.pinMode(pin, GPIO.INPUT, (RP1_GPIO::PinStatus)value);

break;

case INPUT_PULLDOWN:

GPIO.setPullUpDown(GPIO.PULL_DOWN);

GPIO.pinMode(pin, GPIO.INPUT, (RP1_GPIO::PinStatus)value);

break;

case OUTPUT:

GPIO.pinMode(pin, GPIO.OUTPUT, (RP1_GPIO::PinStatus)value);

break;

case OPEN_DRAIN:

GPIO.setPullUpDown(GPIO.PULL_UP);

GPIO.pinMode(pin, GPIO.OPEN_DRAIN, (RP1_GPIO::PinStatus)value);

break;

case OPEN_SOURCE:

GPIO.setPullUpDown(GPIO.PULL_DOWN);

GPIO.pinMode(pin, GPIO.OPEN_SOURCE, (RP1_GPIO::PinStatus)value);

break;

case DISABLE:

GPIO.pinMode(pin, GPIO.DISABLE, (RP1_GPIO::PinStatus)value);

break;

}

inline void digitalWrite(pin_size_t pin, int value)

{

GPIO.digitalWrite(pin, (RP1_GPIO::PinStatus)value);

}

inline int digitalRead(pin_size_t pin, bool sync = false)

{

return GPIO.digitalRead(pin, sync);

}

inline void analogWrite(pin_size_t pin, unsigned long value, unsigned long maxres = 255, unsigned long freq = 1000)

{

unsigned long range = GPIO.PWM0_FREQ / freq;

GPIO.analogWrite(pin, range, (unsigned long long)range * (value > maxres ? maxres : value) / maxres);

}

inline unsigned long nanos(void)

{

return GPIO.nanos();

}

inline unsigned long micros(void)

{

return GPIO.micros();

}

inline unsigned long millis(void)

{

return GPIO.millis();

}

inline void delayNanoseconds(unsigned long ns)

{

GPIO.delayNanoseconds(ns);

}

inline void delayMicroseconds(unsigned long us)

{

GPIO.delayMicroseconds(us);

}

inline void delay(unsigned long ms)

{

GPIO.delay(ms);

}

inline void yield(void)

{

GPIO.yield();

}