twotapfirsfg.py

"""
==================
Two-tap FIR filter
==================
"""
from b_asic import (
    SFG,
    Addition,
    ConstantMultiplication,
    Delay,
    Input,
    Output,
    Signal,
)

# Inputs:
in1 = Input(name="in_1")

# Outputs:
out1 = Output(name="out1")

# Operations:
t1 = Delay(initial_value=0, name="t1")
cmul1 = ConstantMultiplication(
    value=0.5, name="cmul1", latency_offsets={'in0': None, 'out0': None}
)
add1 = Addition(
    name="add1", latency_offsets={'in0': None, 'in1': None, 'out0': None}
)
cmul2 = ConstantMultiplication(
    value=0.5, name="cmul2", latency_offsets={'in0': None, 'out0': None}
)

# Signals:

Signal(source=t1.output(0), destination=cmul1.input(0))
Signal(source=in1.output(0), destination=t1.input(0))
Signal(source=in1.output(0), destination=cmul2.input(0))
Signal(source=cmul1.output(0), destination=add1.input(0))
Signal(source=add1.output(0), destination=out1.input(0))
Signal(source=cmul2.output(0), destination=add1.input(1))
twotapfir = SFG(inputs=[in1], outputs=[out1], name='twotapfir')

# SFG Properties:
prop = {'name': twotapfir}
positions = {
    't1': (-209, 19),
    'cmul1': (-95, 76),
    'add1': (0, 95),
    'cmul2': (-209, 114),
    'out1': (76, 95),
    'in1': (-323, 19),
}