From c1a41b3ce91f2b839faf8559822c1478c12d69d8 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <daniel.friesel@uos.de>
Date: Fri, 24 May 2019 09:10:38 +0200
Subject: add ccs811, max44006, max44009 drivers. Not all are working.

---
 src/driver/ccs811.cc   | 29 +++++++++++++++++++++
 src/driver/max44006.cc | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/driver/max44009.cc | 40 ++++++++++++++++++++++++++++
 3 files changed, 140 insertions(+)
 create mode 100644 src/driver/ccs811.cc
 create mode 100644 src/driver/max44006.cc
 create mode 100644 src/driver/max44009.cc

(limited to 'src')

diff --git a/src/driver/ccs811.cc b/src/driver/ccs811.cc
new file mode 100644
index 0000000..a2b3940
--- /dev/null
+++ b/src/driver/ccs811.cc
@@ -0,0 +1,29 @@
+#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);
diff --git a/src/driver/max44006.cc b/src/driver/max44006.cc
new file mode 100644
index 0000000..a61e7df
--- /dev/null
+++ b/src/driver/max44006.cc
@@ -0,0 +1,71 @@
+#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);
diff --git a/src/driver/max44009.cc b/src/driver/max44009.cc
new file mode 100644
index 0000000..3981e79
--- /dev/null
+++ b/src/driver/max44009.cc
@@ -0,0 +1,40 @@
+#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);
-- 
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