add ccs811, max44006, max44009 drivers. Not all are working.

include/driver/ccs811.h

+#ifndef CCS811_H
+#define CCS811_H
+
+class CCS811 {
+	private:
+		CCS811(const CCS811 &copy);
+		unsigned char const address;
+		unsigned char txbuf[3];
+		unsigned char rxbuf[2];
+
+	public:
+		CCS811(unsigned char const addr) : address(addr) {}
+
+		void init();
+		short check();
+};
+
+extern CCS811 ccs811;
+
+#endif

include/driver/max44006.h

+#ifndef LM75_H
+#define LM75_H
+
+class LM75 {
+	private:
+		LM75(const LM75 &copy);
+		unsigned char const address;
+		unsigned char txbuf[3];
+		unsigned char rxbuf[2];
+
+	public:
+		LM75(unsigned char const addr) : address(addr) {}
+
+		float getTemp();
+		void setOS(unsigned char os);
+		void setHyst(unsigned char hyst);
+};
+
+extern LM75 lm75;
+
+#endif

include/driver/max44009.h

+#ifndef MAX44009_H
+#define MAX44009_H
+
+class MAX44009 {
+	private:
+		MAX44009(const MAX44009 &copy);
+		unsigned char const address;
+		unsigned char txbuf[2];
+		unsigned char rxbuf[2];
+
+	public:
+		MAX44009(unsigned char const addr) : address(addr) {}
+
+		float getLux();
+};
+
+extern MAX44009 max44009;
+
+#endif

src/driver/ccs811.cc

+#include "driver/ccs811.h"
+#include "driver/gpio.h"
+#if defined(MULTIPASS_ARCH_HAS_I2C) && !defined(DRIVER_SOFTI2C)
+#include "driver/i2c.h"
+#else
+#include "driver/soft_i2c.h"
+#endif
+
+#ifdef MULTIPASS_ARCH_esp8266
+#define nWAKE GPIO::d5
+#endif
+
+void CCS811::init()
+{
+	gpio.output(nWAKE);
+	gpio.write(nWAKE, 1);
+}
+
+short CCS811::check()
+{
+	gpio.write(nWAKE, 0);
+	txbuf[0] = 0x20;
+	rxbuf[0] = 0;
+	i2c.xmit(address, 1, txbuf, 1, rxbuf);
+	gpio.write(nWAKE, 1);
+	return rxbuf[0];
+}
+
+CCS811 ccs811(0x5a);

src/driver/max44006.cc

+#include "driver/max44006.h"
+#include "arch.h"
+#if defined(MULTIPASS_ARCH_HAS_I2C) && !defined(DRIVER_SOFTI2C)
+#include "driver/i2c.h"
+#else
+#include "driver/soft_i2c.h"
+#endif
+
+signed char MAX44006::setup()
+{
+	txbuf[0] = 0;
+	txbuf[1] = 0;
+	i2c.xmit(2, txbuf, 0, rxbuf);
+
+	arch.delay_us(10);
+
+	txbuf[0] = 0x01;
+	txbuf[1] = 0x20;
+	i2c.xmit(2, txbuf, 0, rxbuf);
+
+	arch.delay_us(10);
+
+	txbuf[0] = 0x02;
+	txbuf[1] = 0x02;
+	i2c.xmit(2, txbuf, 0, rxbuf);
+
+	return 0;
+}
+
+void MAX44006::wakeup()
+{
+	txbuf[0] = 0;
+	txbuf[1] = 0;
+	i2c.xmit(2, txbuf, 0, rxbuf);
+}
+
+void MAX44006::sleep()
+{
+	txbuf[0] = 0x00;
+	txbuf[1] = 0x08;
+
+	i2c.xmit(2, txbuf, 0, rxbuf);
+}
+
+float LM75::getTemp()
+{
+	txbuf[0] = 0;
+	rxbuf[0] = 0;
+	rxbuf[1] = 0;
+	i2c.xmit(address, 1, txbuf, 2, rxbuf);
+
+	return rxbuf[0] + (rxbuf[1] / 256.0);
+}
+
+void LM75::setOS(unsigned char os)
+{
+	txbuf[0] = 0x03;
+	txbuf[1] = os;
+	txbuf[2] = 0;
+	i2c.xmit(address, 3, txbuf, 0, rxbuf);
+}
+
+void LM75::setHyst(unsigned char hyst)
+{
+	txbuf[0] = 0x02;
+	txbuf[1] = hyst;
+	txbuf[2] = 0;
+	i2c.xmit(address, 3, txbuf, 0, rxbuf);
+}
+
+MAX44006 max44006(0x45);

src/driver/max44009.cc

+#include "driver/max44009.h"
+#if defined(MULTIPASS_ARCH_HAS_I2C) && !defined(DRIVER_SOFTI2C)
+#include "driver/i2c.h"
+#else
+#include "driver/soft_i2c.h"
+#endif
+
+float MAX44009::getLux()
+{
+	unsigned char luxHigh;
+	unsigned char luxLow;
+	unsigned int mantissa, exponent;
+
+	txbuf[0] = 0x03;
+	txbuf[1] = 0x04;
+
+	i2c.xmit(address, 2, txbuf, 2, rxbuf);
+
+	luxHigh = rxbuf[0];
+	luxLow = rxbuf[1];
+
+	/*
+	* The lowest 4 bit of luxLow are the lowest 4 bit of the mantissa.
+	* The lowest 4 bit of luxHigh are the highest 4 bit of the mantissa.
+	*/
+	mantissa = (luxLow & 0x0F) + ((luxHigh & 0x0F) << 4);
+
+	/*
+	* The highest 4 bit of luxHigh are the 4 bit exponent
+	*/
+	exponent = (luxHigh & 0xF0) >> 4;
+
+	/*
+	* Cast base and mantissa to float to avoid calculation errors
+	* because of 16bit integer overflows.
+	*/
+	return (float)(1 << exponent) * (float)mantissa * 0.045;
+}
+
+MAX44009 max44009(0x4a);