Serial.h

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#ifndef SOFTWARE_SERIAL_H
#define SOFTWARE_SERIAL_H

#include "GPIO.h"

namespace Software {
template<BOARD::pin_t TX_PIN>
class Serial : public ::Stream {
public:
  Serial() :
    m_count(((F_CPU / 57600) / 4) - 4)
  {
    m_tx.output();
    m_tx.high();
  }

  void begin(uint32_t baudrate)
  {
#if defined(AVR)
    m_count = ((F_CPU / baudrate) / 4) - 4;
#elif defined(SAM)
    m_count = 1000000 / baudrate;
#endif
  }

  operator bool()
  {
    return (true);
  }

  virtual size_t write(uint8_t byte)
  {
    uint16_t data = ((0xff00 | byte) << 1);
    uint8_t bits = 10;
    noInterrupts();
    do {
      m_tx = data & 0x01;
#if defined(AVR)
      _delay_loop_2(m_count);
#elif defined(SAM)
      delayMicroseconds(m_count);
#endif
      data >>= 1;
    } while (--bits);
    interrupts();
    return (1);
  }

  virtual int available()
  {
    return (0);
  }

  virtual int peek()
  {
    return (-1);
  }

  virtual int read()
  {
    return (-1);
  }

  virtual void flush()
  {
  }

protected:
  GPIO<TX_PIN> m_tx;

  uint16_t m_count;
};
};
#endif