examples: add esp_timer example

examples/system/esp_timer/example_test.py

@@ -0,0 +1,97 @@
+from __future__ import print_function
+import re
+import os
+import sys
+
+# this is a test case write with tiny-test-fw.
+# to run test cases outside tiny-test-fw,
+# we need to set environment variable `TEST_FW_PATH`,
+# then get and insert `TEST_FW_PATH` to sys path before import FW module
+test_fw_path = os.getenv('TEST_FW_PATH')
+if test_fw_path and test_fw_path not in sys.path:
+    sys.path.insert(0, test_fw_path)
+
+import TinyFW
+import IDF
+
+STARTING_TIMERS_REGEX = re.compile(r'Started timers, time since boot: (\d+) us')
+
+# name, period, next_alarm, times_started, times_fired, cb_exec_time
+TIMER_DUMP_LINE_REGEX = re.compile(r'([\w-]+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)')
+
+PERIODIC_TIMER_REGEX = re.compile(r'Periodic timer called, time since boot: (\d+) us')
+
+LIGHT_SLEEP_ENTER_REGEX = re.compile(r'Entering light sleep for 0\.5s, time since boot: (\d+) us')
+LIGHT_SLEEP_EXIT_REGEX = re.compile(r'Woke up from light sleep, time since boot: (\d+) us')
+
+ONE_SHOT_REGEX = re.compile(r'One\-shot timer called, time since boot: (\d+) us')
+
+RESTART_REGEX = re.compile(r'Restarted periodic timer with 1s period, time since boot: (\d+) us')
+
+STOP_REGEX = re.compile(r'Stopped and deleted timers')
+
+INITIAL_TIMER_PERIOD = 500000
+FINAL_TIMER_PERIOD = 1000000
+LIGHT_SLEEP_TIME = 500000
+ONE_SHOT_TIMER_PERIOD = 5000000
+
+@IDF.idf_example_test(env_tag='Example_WIFI')
+def test_examples_system_esp_timer(env, extra_data):
+    dut = env.get_dut('esp_timer_example', 'examples/system/esp_timer')
+    # start test
+    dut.start_app()
+    groups = dut.expect(STARTING_TIMERS_REGEX, timeout=30)
+    start_time = int(groups[0])
+    print('Start time: {} us'.format(start_time))
+    
+    groups = dut.expect(TIMER_DUMP_LINE_REGEX, timeout=2)
+    assert(groups[0] == 'periodic' and int(groups[1]) == INITIAL_TIMER_PERIOD)
+    groups = dut.expect(TIMER_DUMP_LINE_REGEX, timeout=2)
+    assert(groups[0] == 'one-shot' and int(groups[1]) == 0)
+    
+    for i in range(0, 5):
+        groups = dut.expect(PERIODIC_TIMER_REGEX, timeout=2)
+        cur_time = int(groups[0])
+        diff = start_time + (i + 1) * INITIAL_TIMER_PERIOD - cur_time
+        print('Callback #{}, time: {} us, diff: {} us'.format(i, cur_time, diff))
+        assert(abs(diff) < 100)
+
+    groups = dut.expect(ONE_SHOT_REGEX, timeout=3)
+    one_shot_timer_time = int(groups[0])
+    diff = start_time + ONE_SHOT_TIMER_PERIOD - one_shot_timer_time
+    print('One-shot timer, time: {} us, diff: {}'.format(one_shot_timer_time, diff))
+    assert(abs(diff) < 200)
+
+    groups = dut.expect(RESTART_REGEX, timeout=3)
+    start_time = int(groups[0])
+    print('Timer restarted, time: {} us'.format(start_time))
+
+    for i in range(0, 5):
+        groups = dut.expect(PERIODIC_TIMER_REGEX, timeout=2)
+        cur_time = int(groups[0])
+        diff = start_time + (i + 1) * FINAL_TIMER_PERIOD - cur_time
+        print('Callback #{}, time: {} us, diff: {} us'.format(i, cur_time, diff))
+        assert(abs(diff) < 100)
+
+    groups = dut.expect(LIGHT_SLEEP_ENTER_REGEX, timeout=2)
+    sleep_enter_time = int(groups[0])
+    groups = dut.expect(LIGHT_SLEEP_EXIT_REGEX, timeout=2)
+    sleep_exit_time = int(groups[0])
+    sleep_time = sleep_exit_time - sleep_enter_time
+
+    print('Enter sleep: {}, exit sleep: {}, slept: {}'.format(
+        sleep_enter_time, sleep_exit_time, sleep_time))
+
+    assert(abs(sleep_time - LIGHT_SLEEP_TIME) < 1000)
+
+    for i in range(5, 7):
+        groups = dut.expect(PERIODIC_TIMER_REGEX, timeout=2)
+        cur_time = int(groups[0])
+        diff = abs(start_time + (i + 1) * FINAL_TIMER_PERIOD - cur_time)
+        print('Callback #{}, time: {} us, diff: {} us'.format(i, cur_time, diff))
+        assert(diff < 100)
+
+    dut.expect(STOP_REGEX, timeout=2)
+
+if __name__ == '__main__':
+    test_examples_system_esp_timer()