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Arduino-Development

/*
  BluefruitLE_SPI_Stream.h
  Documentation for the various AT commands used below is available at
  https://learn.adafruit.com/adafruit-feather-m0-bluefruit-le/at-commands
 */

#ifndef _BLUEFRUIT_LE_SPI_STREAM_H_
#define _BLUEFRUIT_LE_SPI_STREAM_H_

#include <Adafruit_BluefruitLE_SPI.h>


class BluefruitLE_SPI_Stream : public Stream
{
  public:
    BluefruitLE_SPI_Stream(int8_t csPin, int8_t irqPin, int8_t rstPin);

    void setLocalName(const char *localName);
    void setConnectionInterval(unsigned short minConnInterval, unsigned short maxConnInterval);
    void setFlushInterval(int flushInterval);

    void begin();
    bool poll();
    void end();

    // Print overrides
    size_t write(uint8_t byte);
    using Print::write;  // Expose other write variants

    // Stream overrides
    int available();
    int read();
    int peek();
    void flush();

  private:
    Adafruit_BluefruitLE_SPI ble;

    String localName;
    unsigned short minConnInterval;
    unsigned short maxConnInterval;

    uint8_t txBuffer[SDEP_MAX_PACKETSIZE];
    size_t txCount;
};


BluefruitLE_SPI_Stream::BluefruitLE_SPI_Stream(int8_t csPin, int8_t irqPin, int8_t rstPin) :
  ble(csPin, irqPin, rstPin),
  minConnInterval(0),
  maxConnInterval(0),
  txCount(0)
{ }

void BluefruitLE_SPI_Stream::setLocalName(const char *localName)
{
  this->localName = localName;
}

void BluefruitLE_SPI_Stream::setConnectionInterval(unsigned short minConnInterval, unsigned short maxConnInterval)
{
  this->minConnInterval = minConnInterval;
  this->maxConnInterval = maxConnInterval;
}

void BluefruitLE_SPI_Stream::setFlushInterval(int flushInterval)
{
  // Not used
}

void BluefruitLE_SPI_Stream::begin()
{
  // Initialize the SPI interface
  ble.begin();

  // Perform a factory reset to make sure everything is in a known state
  ble.factoryReset();

  // Disable command echo from Bluefruit
  ble.echo(false);

  // Change the MODE LED to indicate BLE UART activity
  ble.println("AT+HWMODELED=BLEUART");

  // Set local name
  if (localName.length() > 0) {
    ble.print("AT+GAPDEVNAME=");
    ble.println(localName);
  }

  // Set connection interval
  if (minConnInterval > 0 && maxConnInterval > 0) {
    ble.print("AT+GAPINTERVALS=");
    ble.print(minConnInterval);
    ble.print(",");
    ble.print(maxConnInterval);
    ble.println(",,,");
  }

  // Disable real and simulated mode switch (i.e. "+++") command
  ble.println("AT+MODESWITCHEN=local,0");
  ble.enableModeSwitchCommand(false);

  // Switch to data mode
  ble.setMode(BLUEFRUIT_MODE_DATA);
}

bool BluefruitLE_SPI_Stream::poll()
{
  // If there's outgoing data in the buffer, just send it.  The firmware on
  // the nRF51822 will decide when to transmit the data in its TX FIFO.
  if (txCount) flush();

  // In order to check for a connection, we would need to switch from data to
  // command mode and back again.  However, due to the internal workings of
  // Adafruit_BluefruitLE_SPI, this can lead to unread incoming data being
  // lost.  Therefore, we always return true.
  return true;
}

void BluefruitLE_SPI_Stream::end()
{
  flush();
  ble.end();
}

size_t BluefruitLE_SPI_Stream::write(uint8_t byte)
{
  txBuffer[txCount++] = byte;
  if (txCount == sizeof(txBuffer)) flush();
  return 1;
}

int BluefruitLE_SPI_Stream::available()
{
  return ble.available();
}

int BluefruitLE_SPI_Stream::read()
{
  return ble.read();
}

int BluefruitLE_SPI_Stream::peek()
{
  return ble.peek();
}

void BluefruitLE_SPI_Stream::flush()
{
  ble.write(txBuffer, txCount);
  txCount = 0;
}


#endif // _BLUEFRUIT_LE_SPI_STREAM_H_

	/*
	BluefruitLE_SPI_Stream.h

	Documentation for the various AT commands used below is available at
	https://learn.adafruit.com/adafruit-feather-m0-bluefruit-le/at-commands
	*/

	#ifndef _BLUEFRUIT_LE_SPI_STREAM_H_
	#define _BLUEFRUIT_LE_SPI_STREAM_H_

	#include <Adafruit_BluefruitLE_SPI.h>


	class BluefruitLE_SPI_Stream : public Stream
	{
	public:
	BluefruitLE_SPI_Stream(int8_t csPin, int8_t irqPin, int8_t rstPin);

	void setLocalName(const char *localName);
	void setConnectionInterval(unsigned short minConnInterval, unsigned short maxConnInterval);
	void setFlushInterval(int flushInterval);

	void begin();
	bool poll();
	void end();

	// Print overrides
	size_t write(uint8_t byte);
	using Print::write; // Expose other write variants

	// Stream overrides
	int available();
	int read();
	int peek();
	void flush();

	private:
	Adafruit_BluefruitLE_SPI ble;

	String localName;
	unsigned short minConnInterval;
	unsigned short maxConnInterval;

	uint8_t txBuffer[SDEP_MAX_PACKETSIZE];
	size_t txCount;
	};


	BluefruitLE_SPI_Stream::BluefruitLE_SPI_Stream(int8_t csPin, int8_t irqPin, int8_t rstPin) :
	ble(csPin, irqPin, rstPin),
	minConnInterval(0),
	maxConnInterval(0),
	txCount(0)
	{ }

	void BluefruitLE_SPI_Stream::setLocalName(const char *localName)
	{
	this->localName = localName;
	}

	void BluefruitLE_SPI_Stream::setConnectionInterval(unsigned short minConnInterval, unsigned short maxConnInterval)
	{
	this->minConnInterval = minConnInterval;
	this->maxConnInterval = maxConnInterval;
	}

	void BluefruitLE_SPI_Stream::setFlushInterval(int flushInterval)
	{
	// Not used
	}

	void BluefruitLE_SPI_Stream::begin()
	{
	// Initialize the SPI interface
	ble.begin();

	// Perform a factory reset to make sure everything is in a known state
	ble.factoryReset();

	// Disable command echo from Bluefruit
	ble.echo(false);

	// Change the MODE LED to indicate BLE UART activity
	ble.println("AT+HWMODELED=BLEUART");

	// Set local name
	if (localName.length() > 0) {
	ble.print("AT+GAPDEVNAME=");
	ble.println(localName);
	}

	// Set connection interval
	if (minConnInterval > 0 && maxConnInterval > 0) {
	ble.print("AT+GAPINTERVALS=");
	ble.print(minConnInterval);
	ble.print(",");
	ble.print(maxConnInterval);
	ble.println(",,,");
	}

	// Disable real and simulated mode switch (i.e. "+++") command
	ble.println("AT+MODESWITCHEN=local,0");
	ble.enableModeSwitchCommand(false);

	// Switch to data mode
	ble.setMode(BLUEFRUIT_MODE_DATA);
	}

	bool BluefruitLE_SPI_Stream::poll()
	{
	// If there's outgoing data in the buffer, just send it. The firmware on
	// the nRF51822 will decide when to transmit the data in its TX FIFO.
	if (txCount) flush();

	// In order to check for a connection, we would need to switch from data to
	// command mode and back again. However, due to the internal workings of
	// Adafruit_BluefruitLE_SPI, this can lead to unread incoming data being
	// lost. Therefore, we always return true.
	return true;
	}

	void BluefruitLE_SPI_Stream::end()
	{
	flush();
	ble.end();
	}

	size_t BluefruitLE_SPI_Stream::write(uint8_t byte)
	{
	txBuffer[txCount++] = byte;
	if (txCount == sizeof(txBuffer)) flush();
	return 1;
	}

	int BluefruitLE_SPI_Stream::available()
	{
	return ble.available();
	}

	int BluefruitLE_SPI_Stream::read()
	{
	return ble.read();
	}

	int BluefruitLE_SPI_Stream::peek()
	{
	return ble.peek();
	}

	void BluefruitLE_SPI_Stream::flush()
	{
	ble.write(txBuffer, txCount);
	txCount = 0;
	}


	#endif // _BLUEFRUIT_LE_SPI_STREAM_H_