Ctcss squelch block for GRC

[dave_k]

my first contribution
gr_ctcss_squelch_cc.xml

<?xml version="1.0"?> CTCSS Squelch gr_ctcss_squelch_ff Level Controls from gnuradio import gr gr.ctcss_squelch_ff($rate, $freq) set_rate($rate) set_freq($freq) Sample Rate rate int CTCSS Frequency freq real in float out float