53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
/* Copyright 2020 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "clock-f.h"
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#include "test_util.h"
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static uint32_t rtc_fired;
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static struct rtc_time_reg rtc_irq;
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static const int rtc_delay_ms = 500;
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/* Override default RTC interrupt handler */
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void __rtc_alarm_irq(void)
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{
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atomic_add(&rtc_fired, 1);
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reset_rtc_alarm(&rtc_irq);
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}
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test_static int test_rtc_alarm(void)
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{
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struct rtc_time_reg rtc;
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uint32_t rtc_diff_us;
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uint32_t rtc_diff_ms;
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const int delay_us = rtc_delay_ms * MSEC;
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set_rtc_alarm(0, delay_us, &rtc, 0);
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msleep(2 * rtc_delay_ms);
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/* Make sure the interrupt fired exactly once. */
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TEST_EQ(1, atomic_clear(&rtc_fired), "%d");
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rtc_diff_us = get_rtc_diff(&rtc, &rtc_irq);
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ccprintf("rtc_diff_us: %d\n", rtc_diff_us);
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/* Assume we'll always fire within 1 ms. May need to be adjusted if
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* this doesn't hold.
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*/
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rtc_diff_ms = rtc_diff_us / MSEC;
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TEST_EQ(rtc_diff_ms, rtc_delay_ms, "%d");
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return EC_SUCCESS;
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}
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void run_test(int argc, char **argv)
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{
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RUN_TEST(test_rtc_alarm);
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test_print_result();
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}
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