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#!/usr/bin/python
import gras
import numpy
import serial
class ser(gras.Block):
def __init__(self):
gras.Block.__init__(self,
name="ser",
in_sig=[numpy.float32],
out_sig=[numpy.float32])
self.n = 1
def set_parameters(self, port, baud, bytesize, parity, stopbits):
try:
print port
self.ser_obj = serial.Serial(port, baud, bytesize, parity, stopbits)
print("serial found on " + port )
self.ser_obj.open()
except:
print "Couldn't Open Serial Port " + port + " Failed"
def work(self, input_items, output_items):
self.n = input_items[0][0]
out = output_items[0][:self.n]
# Input is size of output_items to be returned
for i in range(self.n):
# Try catch block to avoid Error
# ValueError: invalid literal for int() with base 10: '\xfe354\r\n'
try:
out[i] = int(self.ser_obj.readline())
except:
pass
print "OUT", out[:self.n]
self.produce(0,len(out)) # Produce from port 0 output_items
self.consume(0,1) # Consume from port 0 input_items
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