WIP: Add posix support (Linux/NuttX)

posix/include/CPU_Gpio.h

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+//
+// Copyright (c) .NET Foundation and Contributors
+// Portions Copyright (c) Microsoft Corporation.  All rights reserved.
+// See LICENSE file in the project root for full license information.
+//
+
+
+#ifndef _CPU_GPIO_H_
+#define _CPU_GPIO_H_
+
+#include "include/stdafx.h"
+
+#if defined(BOARD_WSL)
+
+#define NF_POSIX_GPIO
+// multi bank, each have 36
+#define GPIO_MAX_PIN        36
+#define TOTAL_GPIO_PORTS    36
+
+#endif // BOARD_WSL
+
+#if defined(BOARD_PI_ZERO)
+
+#define NF_POSIX_GPIO
+// 1 bank
+#define GPIO_MAX_PIN        27
+#define TOTAL_GPIO_PORTS    27
+
+#endif // BOARD_PI_ZERO
+
+#if defined(BOARD_JH7100)
+
+#define NF_POSIX_GPIO
+// TODO: 1 bank?
+#define GPIO_MAX_PIN        48
+#define TOTAL_GPIO_PORTS    48
+
+#endif // BOARD_JH7100
+
+
+#if defined(BOARD_PI_PICO)
+// 5 gpios seted as gpin in Nuttx
+#define __gpio
+#define GPIO_MAX_PIN        30
+#define TOTAL_GPIO_PORTS    5
+#endif
+
+#if defined(BOARD_PI_ZERO) || defined(BOARD_WSL)
+#define __gpio
+#include <gpiod.h>
+
+struct gpiod_chip *_chip;
+
+// 9 usable gpios
+#define GPIO_MAX_PIN        40
+#define TOTAL_GPIO_PORTS    9
+
+static gpiod_line* pinLineStored[GPIO_MAX_PIN];
+static GpioPinValue pinLineValue[GPIO_MAX_PIN];
+#endif
+
+#if defined(__nuttx__) && defined(__gpio)
+static int ioctrlFdReference[GPIO_MAX_PIN];
+static GpioPinValue pinLineValue[GPIO_MAX_PIN];
+#endif
+
+
+#if defined(__gpio)
+static GpioPinDriveMode pinDirStored[GPIO_MAX_PIN];
+#endif
+
+#endif  //_CPU_GPIO_H_

posix/include/TargetHAL_Spi.h

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+//
+// Copyright (c) .NET Foundation and Contributors
+// See LICENSE file in the project root for full license information.
+//
+
+#ifndef _TARGET_HAL_SPI_H_
+#define _TARGET_HAL_SPI_H_ 1
+
+// # of buses
+#define NUM_SPI_BUSES 0
+
+// Maximum number of devices per SPI bus
+#define MAX_SPI_DEVICES 5
+
+#endif //_TARGET_HAL_SPI_H_

posix/include/TargetPAL_BlockStorage.h

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+//
+// Copyright (c) .NET Foundation and Contributors
+// See LICENSE file in the project root for full license information.
+//
+
+#ifndef _TARGETPAL_BLOCKSTORAGE_H_
+#define _TARGETPAL_BLOCKSTORAGE_H_ 1
+
+// this device has 1 block storage devices
+#define TARGET_BLOCKSTORAGE_COUNT 1
+
+#endif //_TARGETPAL_BLOCKSTORAGE_H_

posix/include/Target_Windows_Storage.h

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+//
+// Copyright (c) .NET Foundation and Contributors
+// See LICENSE file in the project root for full license information.
+//
+
+#ifndef _TARGET_WINDOWS_STORAGE_H_
+#define _TARGET_WINDOWS_STORAGE_H_ 1
+
+#endif //_TARGET_WINDOWS_STORAGE_H_

posix/include/TimerManager.h

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+#ifndef TIMERMANAGER_H_
+#define TIMERMANAGER_H_
+
+#include <stdlib.h>
+#include <iostream>
+#include <pthread.h>
+#include <list>
+#include <unistd.h>
+
+extern "C" {
+  void *create_pthread(void *data);
+}
+
+class TimerManager {
+public:
+  TimerManager();
+  TimerManager(long usec, void (*callback)(void));
+  ~TimerManager();
+  void start();
+  void stop();
+  void addTimer(long usec, void (*callback)(void));
+private:
+  class Timer  
+  {
+  public:
+    Timer(long usec, void (*callback)(void)) :
+      duration(usec),
+      callback(callback),
+      start(0)
+    {      
+    }
+    bool operator ==(Timer other)
+    {
+      if ((this->callback == other.callback) && (this->duration == other.duration)) {
+        return true;
+      }
+      return false;
+    }
+    void operator =(Timer other)
+    {
+      duration = other.duration;
+      callback = other.callback;
+      start = other.start;
+    }
+    suseconds_t duration;
+    void (*callback)(void);
+    suseconds_t start;
+  };
+  Timer setUpTimer(long micro_duration, void (*callback)(void));
+  friend void *create_pthread(void *data);
+  void run();
+  bool m_bRunning;
+  bool m_bGo;
+  bool one_shot;
+  long m_lMinSleep;
+  std::list<Timer> m_cTimers;
+  pthread_t m_tTimerThread;
+  pthread_cond_t m_tGoLockCondition;
+  pthread_mutex_t m_tGoLock;
+};
+
+#endif