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# https://docs.cocotb.org/en/stable/quickstart.html
# test_my_design.py (extended)
import cocotb
from cocotb.triggers import FallingEdge, RisingEdge, Timer, with_timeout
from cocotb.clock import Clock
async def generate_clock(dut):
"""Generate clock pulses."""
for cycle in range(10):
dut.clk.value = 0
await Timer(1, units="ns")
dut.clk.value = 1
await Timer(1, units="ns")
async def drive_waveform(dut, waveform):
for a_val in waveform:
dut.pdm_in.value = a_val
await RisingEdge(dut.clk)
@cocotb.test()
async def my_second_test(dut):
"""Try running with PDM input"""
#dut.rst.value = 1
#await RisingEdge(dut.clk)
#dut.rst.value = 0
pcm_samples = 10
decimation = 64
pdm_data = [0, 0, 1] * (pcm_samples*decimation)
cocotb.start_soon(Clock(dut.clk, 10, units="ns").start())
cocotb.start_soon(drive_waveform(dut, pdm_data))
# wait for the PCM output
for _ in range(pcm_samples):
await with_timeout(RisingEdge(dut.pcm_valid), 100000, 'ns')
dut._log.info("PCM is %s", dut.pcm_out.value)
#dut._log.info("pdm_out is %s", dut.pdm_out.value)
#assert dut.pdm_out.value == 1
dut._log.info("my_signal_1 is %s", dut.pcm_out.value)
assert dut.pcm_out.value == 1212
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