APDS9930: Add string based constructor for Digital Proximity and Ambient Light Sensor

Signed-off-by: Adelin Dobre <adelin.dobre@rinftech.com>

src/apds9930/apds9930.cxx

@@ -27,6 +27,7 @@
 #include <stdexcept>
 
 #include "apds9930.hpp"
+#include "upm_string_parser.hpp"
 
 using namespace upm;
 
@@ -39,6 +40,44 @@ APDS9930::APDS9930(int device)
     }
 }
 
+APDS9930::APDS9930(std::string initStr) : mraaIo(initStr)
+{
+    mraa_io_descriptor* descs = mraaIo.getMraaDescriptors();
+
+    if(!descs->iios)
+    {
+      throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_iio_init() failed");
+    }
+    else
+    {
+        if(!(m_iio = descs->iios[0]))
+        {
+            throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_iio_init() failed");
+
+        }
+    }
+
+    std::vector<std::string> upmTokens;
+
+    if (!mraaIo.getLeftoverStr().empty()) {
+        upmTokens = UpmStringParser::parse(mraaIo.getLeftoverStr());
+    }
+
+    for (std::string tok : upmTokens) {
+      if(tok.substr(0,16) == "enableProximity:") {
+          bool enable = std::stoi(tok.substr(16),nullptr,0);
+          enableProximity(enable);
+      }
+      if(tok.substr(0,18) == "enableIlluminance:") {
+          bool enable = std::stoi(tok.substr(18),nullptr,0);
+          enableIlluminance(enable);
+      }
+    }
+}
+
+
 APDS9930::~APDS9930()
 {
     if (m_iio)
@@ -81,4 +120,4 @@ APDS9930::enableIlluminance(bool enable)
         mraa_iio_write_int(m_iio, "in_illuminance_en", 0);
 
     return true;
-}
+}

src/apds9930/apds9930.hpp

@@ -25,6 +25,7 @@
 
 #include <string>
 #include <mraa/iio.h>
+#include <mraa/initio.hpp>
 
 namespace upm
 {
@@ -60,6 +61,12 @@ class APDS9930
      * @param device iio device number
      */
     APDS9930(int device);
+    /**
+     * Instantiates APDS9930 Digital Proximity and Ambient Light Sensor based on a given string.
+     *
+     * @param initStr string containing specific information for APDS9930 initialization.
+     */
+    APDS9930(std::string initStr);
     /**
      * APDS9930 destructor
      */
@@ -89,5 +96,6 @@ class APDS9930
 
   private:
     mraa_iio_context m_iio;
+    mraa::MraaIo mraaIo;
 };
 }