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tests/periph_timer_periodic: add error tolerance in timings

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On a lot of platforms the peripheral timer fires in advance, adding a precision factor of 15% makes the test more reliable
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Alexandre Abadie 2021-02-10 18:20:46 +01:00
parent cb87c418f4
commit ca26a8fe6a
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1 changed files with 7 additions and 2 deletions
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tests/periph_timer_periodic/tests/01-run.py
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@ -6,19 +6,24 @@
# General Public License v2.1. See the file LICENSE in the top level
# directory for more details.
import os
import sys
import time
from testrunner import run
PRECISION = float(os.getenv("TEST_PERIPH_TIMER_PERIODIC_PRECISION", "0"))
def testfunc(child):
child.expect_exact('TEST START')
start = time.time()
child.expect_exact('TEST SUCCEEDED')
end = time.time()
# test should run 10 cycles with 25ms each
assert (end - start) > 0.25
assert (end - start) < 0.40
elapsed = end - start
assert elapsed > 0.25 * (1 - PRECISION), "=< 0.25s ({})".format(elapsed)
assert elapsed < 0.40 * (1 + PRECISION), "=> 0.40s ({})".format(elapsed)
if __name__ == "__main__":