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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
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