33c64c2578
This test was written to assume that k_busy_wait() and CMSIS osKernelSysTick() (which is just k_cycle_get_32()) were perfectly synchronized. On nRF, they aren't (one is the 32 kHz RTC timer, the other is a calibrated spin loop using the CPU frequency). When ticks were being reported at 100 Hz granularity, there wasn't enough precision to detect the mismatch. Now there is. Rework the test to require that the clocks match to within 1%. Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/*
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* Copyright (c) 2018 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <ztest.h>
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#include <kernel.h>
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#include <cmsis_os.h>
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#define WAIT_TIME_US 1000000
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/**
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* @brief Test kernel start
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*
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* @see osKernelInitialize(), osKernelStart(),
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* osKernelRunning()
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*/
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void test_kernel_start(void)
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{
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if (osFeature_MainThread) {
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/* When osFeature_MainThread is 1 the kernel offers to start
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* with 'main'. The kernel is in this case already started.
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*/
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zassert_true(!osKernelInitialize() && !osKernelStart()
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&& osKernelRunning(), NULL);
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} else {
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/* When osFeature_MainThread is 0 the kernel requires
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* explicit start with osKernelStart.
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*/
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zassert_false(osKernelRunning(), NULL);
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}
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}
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/**
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* @brief Test kernel system timer
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*
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* @see osKernelSysTick()
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*/
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void test_kernel_systick(void)
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{
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u32_t start_time, stop_time, diff, max, min;
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start_time = osKernelSysTick();
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k_busy_wait(WAIT_TIME_US);
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stop_time = osKernelSysTick();
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diff = SYS_CLOCK_HW_CYCLES_TO_NS(stop_time -
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start_time) / NSEC_PER_USEC;
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/* Check that it's within 1%. On some Zephyr platforms
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* (e.g. nRF5x) the busy wait loop and the system timer are
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* based on different mechanisms and may not align perfectly.
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*/
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max = WAIT_TIME_US + (WAIT_TIME_US / 100);
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min = WAIT_TIME_US - (WAIT_TIME_US / 100);
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zassert_true(diff < max && diff > min,
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"start %d stop %d (diff %d) wait %d\n",
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start_time, stop_time, diff, WAIT_TIME_US);
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}
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