ext: add the source code for DSENT

This patch adds a tool called DSENT to the ext/ directory.  DSENT
is a tool that models power and area for on-chip networks.  The next
patch adds a script for using the tool.

1 files changed, 32 insertions, 0 deletions

diff --git a/ext/dsent/model/optical_graph/OpticalDetector.cc b/ext/dsent/model/optical_graph/OpticalDetector.cc
new file mode 100644
index 000000000..8de005099
--- /dev/null
+++ b/ext/dsent/model/optical_graph/OpticalDetector.cc
@@ -0,0 +1,32 @@
+
+#include "model/optical_graph/OpticalDetector.h"
+#include "model/optical_graph/OpticalReceiver.h"
+
+namespace DSENT
+{
+    OpticalDetector::OpticalDetector(const String& instance_name_, OpticalModel* model_, const WavelengthGroup& wavelengths_, OpticalReceiver* receiver_)
+        : OpticalNode(OpticalNode::DETECTOR, instance_name_, model_, wavelengths_), m_receiver_(receiver_), m_responsivity_(0)
+    {
+        m_sensitivity_ = 0.0;
+    }
+
+    OpticalDetector::~OpticalDetector()
+    {
+
+    }
+    
+    void OpticalDetector::setResponsivity(double responsivity_)
+    {
+        m_responsivity_ = responsivity_;
+        return;
+    }
+    
+    double OpticalDetector::getSensitivity(double ER_dB_) const
+    {
+        // Get responsivity (in Amps) of the receiver, divide by responsivity to get sensitivity in Watts
+        return m_receiver_->getSensitivity(ER_dB_) / m_responsivity_;
+    }
+                
+} // namespace DSENT
+
+