Test Specification for ChibiOS/NIL. ChibiOS/NIL Test Suite. Test suite for ChibiOS/NIL. The purpose of this suite is to perform unit tests on the NIL modules and to converge to 100% code coverage through successive improvements. nil_ Internal Tests Information. This sequence reports configuration and version information about the NIL kernel. Port Info. Port-related info are reported. Prints the version string. Kernel Info. The version numbers are reported. Prints the version string. Kernel Settings. The static kernel settings are reported. Prints the configuration options settings. Internal Tests Threads Functionality. This sequence tests the ChibiOS/NIL functionalities related to threading. System Tick Counter functionality. The functionality of the API @p chVTGetSystemTimeX() is tested. A System Tick Counter increment is expected, the test simply hangs if it does not happen. Thread Sleep functionality. The functionality of @p chThdSleep() and derivatives is tested. The current system time is read then a sleep is performed for 100 system ticks and on exit the system time is verified again. The current system time is read then a sleep is performed for 100000 microseconds and on exit the system time is verified again. The current system time is read then a sleep is performed for 100 milliseconds and on exit the system time is verified again. The current system time is read then a sleep is performed for 1 second and on exit the system time is verified again. Function chThdSleepUntil() is tested with a timeline of "now" + 100 ticks. Internal Tests Semaphores. This sequence tests the ChibiOS/NIL functionalities related to counter semaphores. CH_CFG_USE_SEMAPHORES Semaphore primitives, no state change. Wait, Signal and Reset primitives are tested. The testing thread does not trigger a state change. The function chSemWait() is invoked, after return the counter and the returned message are tested. The function chSemSignal() is invoked, after return the counter is tested. The function chSemReset() is invoked, after return the counter is tested. Semaphore primitives, with state change. Wait, Signal and Reset primitives are tested. The testing thread triggers a state change. The function chSemWait() is invoked, after return the counter and the returned message are tested. The semaphore is signaled by another thread. The function chSemWait() is invoked, after return the counter and the returned message are tested. The semaphore is reset by another thread. Semaphores timeout. Timeout on semaphores is tested. The function chSemWaitTimeout() is invoked a first time, after return the system time, the counter and the returned message are tested. The function chSemWaitTimeout() is invoked again, after return the system time, the counter and the returned message are tested. Internal Tests Suspend/Resume and Event Flags. This sequence tests the ChibiOS/NIL functionalities related to threads suspend/resume and event flags. Suspend and Resume functionality. The functionality of chThdSuspendTimeoutS() and chThdResumeI() is tested. The function chThdSuspendTimeoutS() is invoked, the thread is remotely resumed with message @p MSG_OK. On return the message and the state of the reference are tested. The function chThdSuspendTimeoutS() is invoked, the thread is not resumed so a timeout must occur. On return the message and the state of the reference are tested. Events Flags functionality. Event flags functionality is tested. CH_CFG_USE_EVENTS A set of event flags are set on the current thread then the function chEvtWaitAnyTimeout() is invoked, the function is supposed to return immediately because the event flags are already pending, after return the events mask is tested. The pending event flags mask is cleared then the function chEvtWaitAnyTimeout() is invoked, after return the events mask is tested. The thread is signaled by another thread. epmask = 0; events = chEvtWaitAnyTimeout(ALL_EVENTS, TIME_MS2I(1000)); test_assert((eventmask_t)0 != events, "timed out"); test_assert((eventmask_t)0x55 == events, "wrong events mask");]]> The function chEvtWaitAnyTimeout() is invoked, no event can wakeup the thread, the function must return because timeout.