hmtrp: Added functions that throw exceptions when failing to read from sensors, and added java exception handling.

Signed-off-by: Stefan Andritoiu <stefan.andritoiu@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/hmtrp/hmtrp.cxx

@@ -452,6 +452,15 @@ bool HMTRP::getRFSignalStrength(uint8_t *strength)
   return true;
 }
 
+uint8_t HMTRP::getRFSignalStrength()
+{
+  uint8_t strength = 0;
+  if (!getRFSignalStrength(&strength))
+    throw std::runtime_error(std::string(__PRETTY_FUNCTION__) +
+                                ": readData() failed");
+  return strength;
+}
+
 bool HMTRP::getModSignalStrength(uint8_t *strength)
 {
   if (!strength)
@@ -484,3 +493,12 @@ bool HMTRP::getModSignalStrength(uint8_t *strength)
   return true;
 }
 
+uint8_t HMTRP::getModSignalStrength()
+{
+  uint8_t strength = 0;
+  if (!getModSignalStrength(&strength))
+    throw std::runtime_error(std::string(__PRETTY_FUNCTION__) +
+                                ": readData() failed");
+  return strength;
+}
+

src/hmtrp/hmtrp.h

@@ -235,6 +235,14 @@ namespace upm {
      */
     bool getRFSignalStrength(uint8_t *strength);
 
+    /**
+     * Gets the RF signal strength
+     *
+     * @return Signal strength
+     * @throws std::runtime_error if reading from the sensor failed
+     */
+    uint8_t getRFSignalStrength();
+
     /**
      * Gets the modulation signal strength.
      *
@@ -243,6 +251,14 @@ namespace upm {
      */
     bool getModSignalStrength(uint8_t *strength);
 
+    /**
+     * Gets the modulation signal strength.
+     *
+     * @return Signal strength
+     * @throws std::runtime_error if reading from the sensor failed
+     */
+    uint8_t getModSignalStrength();
+
 
   private:
     mraa_uart_context m_uart;

src/hmtrp/javaupm_hmtrp.i

@@ -3,6 +3,7 @@
 %include "stdint.i"
 %include "typemaps.i"
 %include "../java_buffer.i"
+%include "../java_exceptions.i"
 
 %apply uint32_t *OUTPUT { uint32_t *freq, uint32_t *dataRate };
 %apply uint16_t *OUTPUT { uint16_t *rxBandwidth };
@@ -15,6 +16,12 @@
     speed_t int_B9600 = B9600;
 %}
 
+%ignore getRFSignalStrength(uint8_t *strength);
+READDATA_EXCEPTION(getRFSignalStrength())
+
+%ignore getModSignalStrength(uint8_t *strength);
+READDATA_EXCEPTION(getModSignalStrength())
+
 %include "hmtrp.h"
 speed_t int_B9600 = B9600;