Add tests for Sleep HAL API

TESTS/mbed_drivers/ticker/main.cpp

@@ -18,6 +18,9 @@
 #include "utest/utest.h"
 #include "unity/unity.h"
 
+#if !DEVICE_USTICKER
+  #error [NOT_SUPPORTED] test not supported
+#endif
 
 using utest::v1::Case;
 

TESTS/mbed_drivers/timer/main.cpp

@@ -22,6 +22,10 @@
 #include "rtos.h"
 #include "hal/us_ticker_api.h"
 
+#if !DEVICE_USTICKER
+  #error [NOT_SUPPORTED] test not supported
+#endif
+
 using namespace utest::v1;
 
 extern uint32_t SystemCoreClock;

TESTS/mbed_hal/sleep/main.cpp

@@ -0,0 +1,203 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2017 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#if !DEVICE_SLEEP
+#error [NOT_SUPPORTED] sleep not supported for this target
+#endif
+
+#include "mbed.h"
+
+#include "utest/utest.h"
+#include "unity/unity.h"
+#include "greentea-client/test_env.h"
+
+#include "sleep_api_tests.h"
+
+#define US_PER_S 1000000
+
+unsigned int ticks_to_us(unsigned int ticks, unsigned int freq)
+{
+    return (unsigned int)((unsigned long long)ticks * US_PER_S / freq);
+}
+
+unsigned int us_to_ticks(unsigned int us, unsigned int freq)
+{
+    return (unsigned int)((unsigned long long)us * freq / US_PER_S);
+}
+
+using namespace utest::v1;
+
+/* The following ticker frequencies are possible:
+ * high frequency ticker: 250 KHz (1 tick per 4 us) - 8 Mhz (1 tick per 1/8 us)
+ * low power ticker: 8 KHz (1 tick per 125 us) - 64 KHz (1 tick per ~15.6 us)
+ */
+
+/* Used for regular sleep mode, a target should be awake within 10 us. Define us delta value as follows:
+ * delta = default 10 us + worst ticker resolution + extra time for code execution */
+static const uint32_t sleep_mode_delta_us = (10 + 4 + 5);
+
+/* Used for deep-sleep mode, a target should be awake within 10 ms. Define us delta value as follows:
+ * delta = default 10 ms + worst ticker resolution + extra time for code execution */
+static const uint32_t deepsleep_mode_delta_us = (10000 + 125 + 5);
+
+
+void us_ticker_isr(const ticker_data_t *const ticker_data)
+{
+    us_ticker_clear_interrupt();
+}
+
+#ifdef DEVICE_LOWPOWERTIMER
+void lp_ticker_isr(const ticker_data_t *const ticker_data)
+{
+    lp_ticker_clear_interrupt();
+}
+#endif
+
+/* Test that wake-up time from sleep should be less than 10 us and
+ * high frequency ticker interrupt can wake-up target from sleep. */
+void sleep_usticker_test()
+{
+    Timeout timeout;
+    const ticker_data_t * ticker = get_us_ticker_data();
+    const unsigned int ticker_freq = ticker->interface->get_info()->frequency;
+
+    const ticker_irq_handler_type  us_ticker_irq_handler_org = set_us_ticker_irq_handler(us_ticker_isr);
+
+    /* Test only sleep functionality. */
+    sleep_manager_lock_deep_sleep();
+    TEST_ASSERT_FALSE_MESSAGE(sleep_manager_can_deep_sleep(), "deep sleep should be locked");
+
+    /* Testing wake-up time 10 us. */
+    for (timestamp_t i = 100; i < 1000; i += 100) {
+        /* note: us_ticker_read() operates on ticks. */
+
+        const timestamp_t next_match_timestamp = us_ticker_read() + us_to_ticks(i, ticker_freq);
+        us_ticker_set_interrupt(next_match_timestamp);
+
+        sleep();
+
+        TEST_ASSERT_UINT32_WITHIN(us_to_ticks(sleep_mode_delta_us, ticker_freq), next_match_timestamp,
+                                  us_ticker_read());
+    }
+
+    set_us_ticker_irq_handler(us_ticker_irq_handler_org);
+
+    sleep_manager_unlock_deep_sleep();
+    TEST_ASSERT_TRUE(sleep_manager_can_deep_sleep());
+}
+
+#ifdef DEVICE_LOWPOWERTIMER
+
+/* Test that wake-up time from sleep should be less than 10 ms and
+ * low power ticker interrupt can wake-up target from sleep. */
+void deepsleep_lpticker_test()
+{
+    const ticker_data_t * ticker = get_us_ticker_data();
+    const unsigned int ticker_freq = ticker->interface->get_info()->frequency;
+
+    const ticker_irq_handler_type  lp_ticker_irq_handler_org = set_lp_ticker_irq_handler(lp_ticker_isr);
+
+    /* Give some time Green Tea to finish UART transmission before entering
+     * deep-sleep mode.
+     */
+    wait_ms(10);
+
+    TEST_ASSERT_TRUE_MESSAGE(sleep_manager_can_deep_sleep(), "deep sleep should not be locked");
+
+    /* Testing wake-up time 10 ms. */
+    for (timestamp_t i = 20000; i < 200000; i += 20000) {
+        /* note: lp_ticker_read() operates on ticks. */
+        const timestamp_t next_match_timestamp = lp_ticker_read() + us_to_ticks(i, ticker_freq);
+        lp_ticker_set_interrupt(next_match_timestamp);
+
+        sleep();
+
+        TEST_ASSERT_UINT32_WITHIN(us_to_ticks(deepsleep_mode_delta_us, ticker_freq), next_match_timestamp,
+                                  lp_ticker_read());
+    }
+
+    set_lp_ticker_irq_handler(lp_ticker_irq_handler_org);
+
+}
+
+void deepsleep_high_speed_clocks_turned_off_test()
+{
+    const ticker_data_t * us_ticker = get_us_ticker_data();
+    const ticker_data_t * lp_ticker = get_lp_ticker_data();
+    const unsigned int us_ticker_freq = us_ticker->interface->get_info()->frequency;
+    const unsigned int lp_ticker_freq = lp_ticker->interface->get_info()->frequency;
+
+    /* Give some time Green Tea to finish UART transmission before entering
+     * deep-sleep mode.
+     */
+    wait_ms(10);
+
+    TEST_ASSERT_TRUE_MESSAGE(sleep_manager_can_deep_sleep(), "deep sleep should not be locked");
+
+    const unsigned int us_ticks_before_sleep = us_ticker_read();
+
+    const timestamp_t wakeup_time = lp_ticker_read() + us_to_ticks(200000, lp_ticker_freq);
+    lp_ticker_set_interrupt(wakeup_time);
+
+    sleep();
+
+    const unsigned int us_ticks_after_sleep = us_ticker_read();
+    const unsigned int lp_ticks_after_sleep = lp_ticker_read();
+
+    /* High freqency ticker should be disabled in deep-sleep mode. We expect that time difference between
+     * ticker reads before and after the sleep represents only code execution time between calls.
+     * Since we went to sleep for about 200 ms check if time counted by high frequency timer does not
+     * exceed 1 ms.
+     */
+    TEST_ASSERT_UINT32_WITHIN(1000, 0, ticks_to_us(us_ticks_after_sleep - us_ticks_before_sleep, us_ticker_freq));
+
+    /* Check if we have woken-up after expected time. */
+    TEST_ASSERT_UINT32_WITHIN(us_to_ticks(deepsleep_mode_delta_us, lp_ticker_freq), wakeup_time, lp_ticks_after_sleep);
+}
+
+#endif
+
+utest::v1::status_t greentea_failure_handler(const Case * const source, const failure_t reason)
+{
+    greentea_case_failure_abort_handler(source, reason);
+    return STATUS_CONTINUE;
+}
+
+utest::v1::status_t greentea_test_setup(const size_t number_of_cases)
+{
+    GREENTEA_SETUP(60, "default_auto");
+    us_ticker_init();
+#if DEVICE_LOWPOWERTIMER
+    lp_ticker_init();
+#endif
+    /* Suspend RTOS Kernel to enable sleep modes. */
+    osKernelSuspend();
+    return greentea_test_setup_handler(number_of_cases);
+}
+
+Case cases[] = {
+    Case("sleep - source of wake-up - us ticker", sleep_usticker_test, greentea_failure_handler),
+#if DEVICE_LOWPOWERTIMER
+    Case("deep-sleep - source of wake-up - lp ticker",deepsleep_lpticker_test, greentea_failure_handler),
+    Case("deep-sleep - high-speed clocks are turned off",deepsleep_high_speed_clocks_turned_off_test, greentea_failure_handler),
+#endif
+};
+
+Specification specification(greentea_test_setup, cases, greentea_test_teardown_handler);
+
+int main() {
+    Harness::run(specification);
+}

TESTS/mbed_hal/sleep/sleep_api_tests.h

@@ -0,0 +1,69 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2017 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** \addtogroup hal_sleep_tests */
+/** @{*/
+
+#ifndef MBED_SLEEP_API_TESTS_H
+#define MBED_SLEEP_API_TESTS_H
+
+#include "device.h"
+
+#if DEVICE_SLEEP
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** High frequency ticker interrupt can wake up from sleep (locked deep-sleep).
+ *
+ *  Given is an environment with high frequency ticker.
+ *  When the board enters sleep mode.
+ *  Then the board can be wake up from the sleep by high frequency ticker interrupt and
+ *  wake-up time should be less than 10 us.
+ */
+void sleep_usticker_test();
+
+/** Low power ticker interrupt to wake up from deep-sleep (unlocked deep-sleep).
+ *
+ *  Given is an environment with low power ticker.
+ *  When the board enters deep-sleep mode.
+ *  Then the board can be wake up from the sleep by low power ticker interrupt and
+ *  wake-up time should be less than 10 ms.
+ *
+ */
+void deepsleep_lpticker_test();
+
+/** High speed clocks are turned off in deep-sleep (unlocked deep-sleep)
+ *
+ *  Given is an environment with high frequency ticker.
+ *  When the board enters deep-sleep mode.
+ *  Then high frequency ticker does not count while the board is in the deep-sleep mode.
+ *
+ */
+void deepsleep_high_speed_clocks_turned_off_test();
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+#endif
+
+/**@}*/

hal/sleep_api.h

@@ -27,6 +27,42 @@
 extern "C" {
 #endif
 
+/**
+ * \defgroup hal_sleep sleep hal requirements
+ * Low level interface to the sleep mode of a target.
+ *
+ * # Defined behaviour
+ *
+ * * Sleep mode
+ *   * wake-up time should be less than 10 us - Verified by sleep_usticker_test().
+ *   * the processor can be woken up by any internal peripheral interrupt  - Verified by sleep_usticker_test().
+ *   * all peripherals operate as in run mode - not verified.
+ *   * the processor can be woken up by external pin interrupt - not verified.
+ * * Deep sleep
+ *   * the wake-up time should be less than 10 ms - Verified by deepsleep_lpticker_test().
+ *   * lp ticker should wake up a target from this mode - Verified by deepsleep_lpticker_test().
+ *   * RTC should wake up a target from this mode - not verified.
+ *   * an external interrupt on a pin should wake up a target from this mode - not verified.
+ *   * a watchdog timer should wake up a target from this mode - not verified.
+ *   * High-speed clocks are turned off - Verified by deepsleep_high_speed_clocks_turned_off_test().
+ *   * RTC keeps time - Verified by rtc_sleep_test().
+ *
+ * # Undefined behaviour
+ *
+ * * peripherals aside from RTC, GPIO and lp ticker result in undefined behaviour in deep sleep.
+ * @{
+ */
+
+/**
+ * \defgroup hal_sleep_tests sleep hal tests
+ * The sleep HAL tests ensure driver conformance to defined behaviour.
+ *
+ * To run the sleep hal tests use the command:
+ *
+ *     mbed test -t <toolchain> -m <target> -n tests-mbed_hal-sleep*
+ *
+ */
+
 /** Send the microcontroller to sleep
  *
  * The processor is setup ready for sleep, and sent to sleep. In this mode, the
@@ -53,6 +89,8 @@ void hal_sleep(void);
  */
 void hal_deepsleep(void);
 
+/**@}*/
+
 #ifdef __cplusplus
 }
 #endif
@@ -61,4 +99,4 @@ void hal_deepsleep(void);
 
 #endif
 
-/** @}*/
+/**@}*/