TMP006: Adding very basic support for TMP007

Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>

examples/c++/tmp006.cxx

@@ -44,8 +44,13 @@ int main(int argc, char **argv)
 //! [Interesting]
   std::cout << "Initializing test-application..." << std::endl;
 
+  // please make sure that you have the right i2c address for your device
+  // the correct range of addresses is 0x40 - 0x47
   // Instantiate an TMP006 instance on bus 1
-  upm::TMP006 *mySensor = new upm::TMP006(1);
+  upm::TMP006 *mySensor = new upm::TMP006(1, TMP006_CONFIG_CR_DEF, TMP006_I2C_ADDRESS);
+
+  // you can also get basic tmp007 functionality by initializing it as follows
+  //upm::TMP006 *mySensor = new upm::TMP006(1, TMP006_CONFIG_CR_DEF, TMP007_I2C_ADDRESS);
 
   // activate periodic measurements
   mySensor->setActive();

src/tmp006/tmp006.cpp

@@ -42,9 +42,11 @@ TMP006::TMP006(int bus, uint8_t conv_rate, int devAddr) : m_i2ControlCtx(bus) {
 
     m_temperature = 0;
 
-    m_name = TMP006_NAME;;
+    m_name = TMP006_NAME;
 
     m_controlAddr = devAddr;
+
+    sensorType = TMP006_SEN;
     m_bus = bus;
 
     if (conv_rate > TMP006_CONFIG_CR_AS16) {
@@ -85,20 +87,46 @@ TMP006::checkID(void)
     uint8_t tmp[2];
     uint16_t id;
     int re = 0;
+    int ret = 0;
 
+    tmp[0] = 0;tmp[1] = 0;
+    // Checking if TMP006
     re = m_i2ControlCtx.readBytesReg(TMP006_DEVICE_ID_REG, tmp, 2);
     if (re != 2) {
         /* not enough bytes were read! */
-        return -1;
+        //return -1;
+        ret = -1;
     }
 
     id = ((uint16_t)tmp[0] << 8) | tmp[1];
 
     if (id != TMP006_DEVICE_ID) {
-        return -1;
+        //return -1;
+        ret = -1;
+    } else {
+        sensorType = TMP006_SEN;
+        return 0;
     }
 
-    return 0;
+    // Checking if TMP007
+    re = m_i2ControlCtx.readBytesReg(TMP007_DEVICE_ID_REG, tmp, 2);
+    if (re != 2) {
+        /* not enough bytes were read! */
+        //return -1;
+        ret = -1;
+    }
+
+    id = ((uint16_t)tmp[0] << 8) | tmp[1];
+
+    if (id != TMP007_DEVICE_ID) {
+        //return -1;
+        ret = -1;
+    } else {
+        sensorType = TMP007_SEN;
+        return 0;
+    }
+
+    return ret;
 }
 
 void
@@ -174,9 +202,11 @@ TMP006::sampleData(void)
 
     *drdy = buf[0] & (TMP006_DRDY_DATA_RDY);
 
-    if(! (*drdy)) {
+    if(sensorType == TMP006_SEN) {
-        /* conversation in progress */
+        if(! (*drdy)) {
-        return -1;
+            /* conversation in progress */
+            return -1;
+        }
     }
 
     tmp = m_i2ControlCtx.readWordReg(TMP006_SENSOR_VOLTAGE);

src/tmp006/tmp006.hpp

@@ -35,6 +35,10 @@
 #define TMP006_MANUFACTURER_ID 0x5449
 #define TMP006_DEVICE_ID       0x0067
 
+#define TMP007_I2C_ADDRESS     0x40
+// this should actually be split
+#define TMP007_DEVICE_ID       0x0078
+
 #ifndef TMP006_CONVERSION_TIME
 #define TMP006_CONVERSION_TIME 1E6 /**< Default Conversion Time in us */
 #endif
@@ -46,6 +50,9 @@
 #define TMP006_MANUFACTURER_ID_REG 0xFE
 #define TMP006_DEVICE_ID_REG       0xFF
 
+/* TMP007 Register Map */
+#define TMP007_DEVICE_ID_REG       0x1F
+
 /* TMP006 configuration register bitmap */
 #define TMP006_RST_SOFT         (1 << 15)
 
@@ -86,6 +93,10 @@
 #define TMP006_CCONST_C2       13.4      /* Constant \f$c_{\mathrm{2}}\f$ */
 #define TMP006_CCONST_LSB_SIZE 156.25E-9 /* Sensor Voltage Register LSB Size */
 
+typedef enum {
+    TMP006_SEN,
+    TMP007_SEN } tmp_t;
+
 namespace upm {
 
 /**
@@ -195,6 +206,7 @@ class TMP006 {
         int m_controlAddr;
         int m_bus;
         mraa::I2c m_i2ControlCtx;
+        tmp_t sensorType;
 
         int32_t m_temperature;
 };