diff --git a/software/signal_processing/add.c b/software/signal_processing/add.c
index c0be7d1..205aff4 100644
--- a/software/signal_processing/add.c
+++ b/software/signal_processing/add.c
@@ -4,7 +4,21 @@
 
 int task_add_run( void * task ) {
 
-    // TODO
+    add_config * addiere = ( add_config * ) task;
+    uint32_t data_channel_base = addiere->sink;
+    data_channel_clear( data_channel_base );
+
+    for ( uint32_t i = 0; i < DATA_CHANNEL_DEPTH; ++i)
+	{
+		float_word res;
+		float_word sin_val;
+		float_word cos_val;
+		data_channel_read(addiere->sources[0], &sin_val.value);
+		data_channel_read(addiere->sources[1], &cos_val.value);
+		res.value = sin_val.value + cos_val.value;
+
+		data_channel_write( data_channel_base, res.word );
+	}
 
     return 0;
 }