added sample my_block code

3 files changed, 113 insertions, 0 deletions

diff --git a/code/.grc_gnuradio/my_block.py b/code/.grc_gnuradio/my_block.py
new file mode 100644
index 0000000..2c3dffc
--- /dev/null
+++ b/code/.grc_gnuradio/my_block.py
@@ -0,0 +1,30 @@
+import gras
+import numpy
+
+class MyBlock(gras.Block):
+
+	def __init__(self):
+		gras.Block.__init__(self,
+			name="my_block",
+			in_sig=[numpy.float32, numpy.float32], # input and output are 32bit numpy float datatype
+			out_sig=[numpy.float32])	
+		
+
+	def set_parameters(self, value):
+		self.value = value
+	
+	# Here's where you define the function of block | This function runs for each input value
+	def work(self, input_items, output_items):
+		
+		# output_items is a double array | first index corresponds to output port which starts from 0
+		# since we have only one output, first index is 0
+		# the item has to be an array even if it is a single integer
+		output_items[0][:1] = input_items[0][:1] + self.value
+
+		print "Output Value", output_items[0][:1]
+		print "Hello World"
+		
+		# These lines report to GNU Radio how many items were consumed and produced
+		self.consume(0, 1) # Consume one item from input port 0 
+		self.produce(0, 1) # Produce one item from output port 0
+
diff --git a/code/.grc_gnuradio/my_block.xml b/code/.grc_gnuradio/my_block.xml
new file mode 100644
index 0000000..36326ca
--- /dev/null
+++ b/code/.grc_gnuradio/my_block.xml
@@ -0,0 +1,82 @@
+<?xml version="1.0"?>
+<!--
+###################################################
+##Add Block:
+##    all types, 1 output, 2 to inf inputs
+###################################################
+ -->
+<block>
+    <name>my_block</name>
+    <key>my_block_key</key>
+    <category>My Block</category>
+
+<!-- This section is Cheetah Script
+-->
+    <import>import my_block</import>
+    <make>my_block.MyBlock()
+self.$(id).set_parameters($value)
+    </make>
+    <param>
+        <name>IO Type</name>
+        <key>type</key>
+        <type>enum</type>
+        <option><name>F32_F32</name><key>f32_f32</key></option>
+        <option><name>S32_S32</name><key>s32_s32</key></option>
+        <option><name>S16_S16</name><key>s16_s16</key></option>
+        <option><name>S8_S8</name><key>s8_s8</key></option>
+    </param>
+    <param>
+        <name>Num Inputs</name>
+        <key>num_inputs</key>
+        <value>2</value>
+        <type>int</type>
+    </param>
+    
+    <param>
+        <name>Vec Length</name>
+        <key>vlen</key>
+        <value>1</value>
+        <type>int</type>
+    </param>
+   
+   <!-- My Block parameter, this value is used to sum with input; and pass that as output of my block
+   -->
+    <param>
+    	<name>Value</name>
+	<key>value</key>
+	<value>1</value>
+	<type>int</type>
+    </param>
+
+    <!--
+    Check if number of inputs are greater than 0, and if vector length
+    is greater than 0.
+    -->
+    <check>$num_inputs &gt; 0</check>
+    <check>$vlen &gt; 0</check>
+   
+    <!--
+    Input of the block
+    -->
+    <sink>
+        <name>in</name>
+        <type>$(str($type).split('_')[0])</type>
+        <vlen>$vlen</vlen>
+        <nports>$num_inputs</nports>
+    </sink>
+    
+    <!--
+    Output of the block
+    -->
+    <source>
+        <name>out</name>
+        <type>$(str($type).split('_')[1])</type>
+        <vlen>$vlen</vlen>
+    </source>
+    <doc>
+	Your Documentation Goes Here
+
+	This block outputs sum of value and input and prints "Hello World" onto the terminal
+	output = input + value
+   </doc>
+</block>
diff --git a/code/README b/code/README
new file mode 100644
index 0000000..f6225a8
--- /dev/null
+++ b/code/README
@@ -0,0 +1 @@
+This folder contains a hidden folder .grc_gnuradio/ which has sample code.