1 files changed, 43 insertions, 0 deletions
diff --git a/gr-input/python/gr_step_source.py b/gr-input/python/gr_step_source.py
new file mode 100644
index 000000000..904f89292
--- /dev/null
+++ b/gr-input/python/gr_step_source.py
@@ -0,0 +1,43 @@
+#!/usr/bin/python
+
+import gras
+import numpy
+# Serial is imported in __init__
+class step(gras.Block):
+	
+
+        def __init__(self):
+                gras.Block.__init__(self,
+                        name="ser",
+                        in_sig=[numpy.float32],
+                        out_sig=[numpy.float32])
+		self.flag=True
+
+        def set_parameters(self, step_size, offset, width):
+		self.step_size = step_size	
+		self.width = width
+		self.offset = offset
+
+        def work(self, input_items, output_items):
+		
+                out = output_items[0][0:1]
+		input_stream = input_items[0][0]
+
+		if self.flag:
+			for i in range(self.width):
+				out[:1] = self.offset	
+				print "OUT", out
+					
+				self.produce(0,1) # Produce from port 0 output_items
+				self.consume(0,1) # Consume from port 0 input_items
+
+			self.flag = False
+
+		else:	
+			out[:1] = self.offset + input_stream*self.step_size
+			
+			print "OUT", out
+				
+			self.produce(0,1) # Produce from port 0 output_items
+			self.consume(0,1) # Consume from port 0 input_items
+