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Variable i2s bit width (#331)

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- Add support for variable width I2S (via XUA_I2S_N_BITS)
- Add support for variable width TDM (again via XUD_I2S_N_BITS when XUA_PCM_FORMAT=XUA_PCM_FORMAT_TDM)
- Includes support for xcore as I2S/TDM master and slave
- Add testing of the the above to test_i2s_loopback
- Rationalised test config building in test_i2s_loopback
- Documentation updated
This commit is contained in:
Ross Owen
2023-06-08 15:31:12 +01:00
committed by GitHub
parent d3ad29e8a6
commit 1ef5129fde
16 changed files with 221 additions and 196 deletions
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25
tests/test_i2s_loopback.py
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@@ -1,4 +1,4 @@
# Copyright 2018-2022 XMOS LIMITED.
# Copyright 2018-2023 XMOS LIMITED.
# This Software is subject to the terms of the XMOS Public Licence: Version 1.
import pytest
import Pyxsim
@@ -11,16 +11,21 @@ import sys
def test_file(request):
return str(request.node.fspath)
def do_test(
pcm_format, i2s_role, channel_count, sample_rate, test_file, options, capfd
pcm_format, i2s_role, channel_count, sample_rate, word_length, test_file, options, capfd
):
build_options = []
output = []
testname, _ = os.path.splitext(os.path.basename(test_file))
desc = f"simulation_{pcm_format}_{i2s_role}_{channel_count}in_{channel_count}out_{sample_rate}"
build_options += [f"pcm_format={pcm_format}"]
build_options += [f"i2s_role={i2s_role}"]
build_options += [f"channel_count={channel_count}"]
build_options += [f"sample_rate={sample_rate}"]
build_options += [f"word_length={word_length}"]
desc = f"simulation_{pcm_format}_{i2s_role}_{channel_count}in_{channel_count}out_{sample_rate}_{word_length}bit"
binary = f"{testname}/bin/{desc}/{testname}_{desc}.xe"
tester = testers.ComparisonTester(open("pass.expect"))
@@ -52,6 +57,7 @@ def do_test(
result = Pyxsim.run_on_simulator(
binary,
build_options=build_options,
tester=tester,
simargs=simargs,
capfd=capfd,
@@ -65,25 +71,26 @@ def do_test(
@pytest.mark.parametrize("i2s_role", ["master", "slave"])
@pytest.mark.parametrize("pcm_format", ["i2s", "tdm"])
@pytest.mark.parametrize("channel_count", [2, 8, 16])
@pytest.mark.parametrize("sample_rate", ["48khz", "96khz", "192khz"])
@pytest.mark.parametrize("word_length", [16, 32]) # I2S world length in bits
@pytest.mark.parametrize("sample_rate", [48000, 96000, 192000])
def test_i2s_loopback(
i2s_role, pcm_format, channel_count, sample_rate, test_file, options, capfd
i2s_role, pcm_format, channel_count, sample_rate, word_length, test_file, options, capfd
):
if pcm_format == "i2s" and channel_count == 16:
pytest.skip("Invalid parameter combination")
if pcm_format == "i2s" and sample_rate not in ["48khz", "192khz"]:
if pcm_format == "i2s" and sample_rate not in [48000, 192000]:
pytest.skip("Invalid parameter combination")
if pcm_format == "tdm" and channel_count == 2:
pytest.skip("Invalid parameter combination")
if pcm_format == "tdm" and sample_rate == "192khz":
if pcm_format == "tdm" and sample_rate == 192000:
pytest.skip("Invalid parameter combination")
result = do_test(
pcm_format, i2s_role, channel_count, sample_rate, test_file, options, capfd
pcm_format, i2s_role, channel_count, sample_rate, word_length, test_file, options, capfd
)
assert result