Hello Guys
I'm currently in the process of creating a block in python that does two things; takes in a certain number of input items, and once it
reaches a certain number of input items 2) it sends a command to the UHD USRP sink block to adjust its gain by a
certain amount.
I have a few questions. 1) Is it even possible to create a single block that can accomplish both these tasks? 2) How exactly do I make this block issue the command to adjust the gain after it receives a certain number of values??
Below is some code that I currently have constructed for this purpose. I'm pretty new to python so I'm sure this code is probably not the most efficient way but any suggestions are welcome.
Tellrell
import numpy as np
from gnuradio import gr
import pmt
from random import uniform
class blk(gr.sync_block):
def __init__(self, initial_gain=5, stop_gain=15, step=0.5)# only default arguments here
gr.sync_block.__init__(
self,
name='Gain Sweeper',
in_sig=[np.complex32],
out_sig=[np.complex32]
)
self.message_port_register_in(pmt.intern('msg_in'))
self.set_msg_handler(pmt.intern('msg_in'),self.handle_msg)
self.message_port_register_out(pmt.intern('msg_out'))
self.gain = initial_gain
self.step = step
self.stop = stop_gain
def handle_msg(self, pdu, a= 0000000000):
self.message_port_pub(pmt.intern('msg_out'),pmt.cons
(pmt.intern("gain"),pmt.to_pmt(self.gain)))
self.gain+=self.step
return 1
def work(self, input_items, output_items):
in0 = input_items[0]
out = output_items[0]
while i <= 100000000:
sample = in0[i]
if i == 100000000:
sample = 0
return len(output_items[0])