test/automated: PWM duty cycle verification test using GPIO loopback #3568
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added 2 commits
January 30, 2026 15:11
The framework provides macros for defining test cases and test suites with automatic counting of passed and failed tests. Features: - MTEST_CASE macro for defining individual test cases - MTEST_SUITE macro for grouping test cases into suites - MTEST_INIT_ASSERT, MTEST_CLEANUP_ASSERT, and MTEST_CASE_ASSERT macros for test assertions with formatted output per test phase - MTEST_INIT and MTEST_CLEANUP for initializing/deinitializing necessary resources - MTEST_RUN_INIT and MTEST_RUN_CLEANUP for executing initialization and cleanup Init and cleanup are optional for the user to define. Any configuration to be done must be run explicitly by the user via the defined macros MTEST_RUN_INIT and MTEST_RUN_CLEANUP at the beginning and end of the suite, test cases should be placed between those two macros.
Add test that verifies PWM duty cycle accuracy by sampling the output pin via GPIO reads. The test uses a timer to sample GPIO state and calculates measured duty cycle from high versus total samples. Each test configures PWM duty, collects samples via timer callback, and validates measured duty falls within tolerance. Test requires physical loopback between PWM output and GPIO input pin.
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Add test that verifies PWM duty cycle accuracy by sampling the
output pin via GPIO reads. The test uses a timer to sample GPIO state
and calculates measured duty cycle from high versus total samples.
Each test configures PWM duty, collects samples via timer callback,
and validates measured duty falls within tolerance.
Test requires physical loopback between PWM output and GPIO input pin.
Related to #3566