From ab20e34c596a1dfe72c8ba7c0ac1f0d958a096d4 Mon Sep 17 00:00:00 2001
From: Jon Trulson <jtrulson@ics.com>
Date: Thu, 10 Sep 2015 14:11:06 -0600
Subject: [PATCH] max44000: throw exception(s) on fatal errors

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
---
 src/max44000/max44000.cxx | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/max44000/max44000.cxx b/src/max44000/max44000.cxx
index 86365e2c..13eb43a9 100644
--- a/src/max44000/max44000.cxx
+++ b/src/max44000/max44000.cxx
@@ -23,6 +23,8 @@
  */
 
 #include <iostream>
+#include <string>
+#include <stdexcept>
 #include <unistd.h>
 #include <stdlib.h>
 
@@ -36,9 +38,17 @@ MAX44000::MAX44000 (int bus, int devAddr) : m_i2cMaxControlCtx(bus) {
     m_maxControlAddr = devAddr;
     m_bus = bus;
 
+    if ( !(m_i2cMaxControlCtx = mraa_i2c_init(m_bus)) ) 
+      {
+        throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_i2c_init() failed");
+        return;
+      }
+
     mraa::Result ret = m_i2cMaxControlCtx.address(m_maxControlAddr);
     if (ret != mraa::SUCCESS) {
-        fprintf(stderr, "Messed up i2c bus\n");
+        throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_i2c_address() failed");
     }
 
     // i2cWriteReg (MCR, 0x2C);