adding tmp102 sensor for the econotag from Hedde Bosman.

This can be pulling in as a common driver if we can make a generic i2c
Contiki driver.

platform/redbee-econotag/Makefile.redbee-econotag

@@ -4,7 +4,7 @@ CONTIKI_TARGET_DIRS = . dev apps net
 CONTIKI_CORE=contiki-mc1322x-main
 CONTIKI_TARGET_MAIN = ${CONTIKI_CORE}.o
 
-CONTIKI_TARGET_SOURCEFILES += contiki-mc1322x-main.c clock.c button-sensor.c sensors.c slip.c light-sensor.c
+CONTIKI_TARGET_SOURCEFILES += contiki-mc1322x-main.c clock.c button-sensor.c sensors.c slip.c light-sensor.c tmp102-sensor.c
 
 CONTIKIMC1322X=$(CONTIKI)/cpu/mc1322x
 CONTIKIBOARD=.

platform/redbee-econotag/dev/tmp102-sensor.c

@@ -0,0 +1,87 @@
+/*
+ * An interface to the TI TMP102 temperature sensor
+ * 12 bit temperature reading, 0.5 deg. Celsius accuracy
+ * -----------------------------------------------------------------
+ *
+ * Author  : Hedde Bosman (heddebosman@incas3.eu)
+ */
+
+#include "contiki.h"
+#include "lib/sensors.h"
+#include "dev/tmp102-sensor.h"
+
+#ifndef bool
+#define bool uint8_t
+#endif
+
+#ifndef false
+#define false 0
+#endif
+
+#ifndef true
+#define true 1
+#endif
+
+
+static void set_configuration(uint8_t rate, bool precision) {
+	uint8_t tx_buf[] = {TMP102_REGISTER_CONFIGURATION, 
+						0,
+						(precision ? TMP102_CONF_EXTENDED_MODE : 0) | ((rate << 6) & TMP102_CONF_CONVERSION_RATE)
+						};
+
+	i2c_transmitinit(TMP102_ADDR, 3, tx_buf);
+}
+
+/*---------------------------------------------------------------------------*/
+static int value(int type) {
+	uint8_t reg = TMP102_REGISTER_TEMPERATURE;
+	uint8_t temp[2];
+	int16_t temperature = 0;
+	
+	/* transmit the register to start reading from */
+	i2c_transmitinit(TMP102_ADDR, 1, &reg);
+	while (!i2c_transferred()); // wait for data to arrive
+
+	/* receive the data */
+	i2c_receiveinit(TMP102_ADDR, 2, temp);
+	while (!i2c_transferred()); // wait for data to arrive
+	
+	// 12 bit normal mode
+	temperature = ((temp[0] <<8) | (temp[1])) >> 4; // lsb
+
+	// 13 bit extended mode
+	//temperature = ((temp[0] <<8) | (temp[1])) >> 3; // lsb
+
+	temperature = (100*temperature)/16; // in 100th of degrees
+	
+	return temperature;
+}
+/*---------------------------------------------------------------------------*/
+static int status(int type) {
+	switch (type) {
+		case SENSORS_ACTIVE:
+		case SENSORS_READY:
+			return 1; // fix?
+			break;
+	}
+	return 0;
+}
+/*---------------------------------------------------------------------------*/
+static int configure(int type, int c) {
+	switch (type) {
+		case SENSORS_ACTIVE:
+			if (c) {
+				// set active
+				set_configuration(1, false); // every 1 second, 12bit precision
+			} else {
+				// set inactive
+			}
+			return 1;
+	}
+	return 0;
+}
+
+
+/*---------------------------------------------------------------------------*/
+SENSORS_SENSOR(tmp102_sensor, "Temperature", value, configure, status); // register the functions
+

platform/redbee-econotag/dev/tmp102-sensor.h

@@ -0,0 +1,44 @@
+/*
+ * An interface to the TI TMP102 temperature sensor
+ * 12 bit temperature reading, 0.5 deg. Celsius accuracy
+ * -----------------------------------------------------------------
+ *
+ * Author  : Hedde Bosman (heddebosman@incas3.eu)
+ */
+
+#ifndef __TMP102_SENSOR_H__
+#define __TMP102_SENSOR_H__
+
+#include "i2c.h"
+
+#include "lib/sensors.h"
+
+extern const struct sensors_sensor tmp102_sensor;
+
+#define TMP102_VALUE_TYPE_DEFAULT 0
+
+#define TMP102_ADDR				0x48 // if A0 @ ground
+//#define TMP102_ADDR				0x49 // if A0 @ V+
+//#define TMP102_ADDR				0x4A // if A0 @ SDA
+//#define TMP102_ADDR				0x4B // if A0 @ SCL
+
+#define TMP102_REGISTER_TEMPERATURE		0x00
+#define TMP102_REGISTER_CONFIGURATION	0x01
+#define TMP102_REGISTERO_T_LOW			0x02
+#define TMP102_REGISTERO_T_HIGH			0x03
+
+
+#define TMP102_CONF_EXTENDED_MODE 		0x10
+#define TMP102_CONF_ALERT				0x20
+#define TMP102_CONF_CONVERSION_RATE		0xC0 // 2 bits indicating conversion rate (0.25, 1, 4, 8 Hz)
+
+#define TMP102_CONF_SHUTDOWN_MODE		0x01
+#define TMP102_CONF_THERMOSTAT_MODE		0x02 // 0 = comparator mode, 1 = interrupt mode
+#define TMP102_CONF_POLARITY			0x04
+#define TMP102_CONF_FAULT_QUEUE			0x18 // 2 bits indicating number of faults
+#define TMP102_CONF_RESOLUTION			0x60 // 2 bits indicating resolution, default = b11 = 0x60
+#define TMP102_CONF_ONESHOT_READY		0x80 // 
+
+
+#endif
+