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#!/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
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