Diff: mbed-os/TESTS/mbed_drivers/timeout/main.cpp

Revision:

0:9fca2b23d0ba

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os/TESTS/mbed_drivers/timeout/main.cpp	Sat Feb 23 12:13:36 2019 +0000
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2013-2016, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
+
+/*
+ * Tests is to measure the accuracy of Timeout over a period of time
+ *
+ *
+ * 1) DUT would start to update callback_trigger_count every milli sec
+ * 2) Host would query what is current count base_time, Device responds by the callback_trigger_count
+ * 3) Host after waiting for measurement stretch. It will query for device time again final_time.
+ * 4) Host computes the drift considering base_time, final_time, transport delay and measurement stretch
+ * 5) Finally host send the results back to device pass/fail based on tolerance.
+ * 6) More details on tests can be found in timing_drift_auto.py
+ *
+ */
+
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "utest/utest.h"
+#include "unity/unity.h"
+
+using namespace utest::v1;
+
+#define PERIOD_US   10000
+
+volatile int ticker_count = 0;
+volatile uint32_t callback_trigger_count = 0;
+static const int test_timeout = 240;
+Timeout timeout;
+
+void set_incremeant_count() {
+    timeout.attach_us(set_incremeant_count, PERIOD_US);
+    ++callback_trigger_count;
+}
+
+void test_case_timeout() {
+
+    char _key[11] = { };
+    char _value[128] = { };
+    int expected_key = 1;
+    uint8_t results_size = 0;
+
+    greentea_send_kv("timing_drift_check_start", 0);
+    timeout.attach_us(set_incremeant_count, PERIOD_US);
+
+    // wait for 1st signal from host
+    do {
+        greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
+        expected_key = strcmp(_key, "base_time");
+    } while (expected_key);
+
+    greentea_send_kv(_key, callback_trigger_count * PERIOD_US);
+
+    // wait for 2nd signal from host
+    greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
+    greentea_send_kv(_key, callback_trigger_count * PERIOD_US);
+
+    //get the results from host
+    greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
+
+    TEST_ASSERT_EQUAL_STRING_MESSAGE("pass", _key,"Host side script reported a fail...");
+}
+
+// Test casess
+Case cases[] = { Case("Timers: toggle on/off", test_case_timeout), };
+
+utest::v1::status_t greentea_test_setup(const size_t number_of_cases) {
+    GREENTEA_SETUP(test_timeout, "timing_drift_auto");
+    return greentea_test_setup_handler(number_of_cases);
+}
+
+Specification specification(greentea_test_setup, cases, greentea_test_teardown_handler);
+
+int main() {
+    Harness::run(specification);
+}