Anders Blomdell / mbed-sdk-tools

Clone of official tools

host_tests/wait_us_auto.py@47:21ae3e5a7128, 2021-02-04 (annotated)

Committer:
Anders Blomdell
Date:
Thu Feb 04 17:17:13 2021 +0100
Revision:
47:21ae3e5a7128
Parent:
0:66f3b5499f7f 
Add a few normpath calls

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 0:66f3b5499f7f 1 """
screamer 0:66f3b5499f7f 2 mbed SDK
screamer 0:66f3b5499f7f 3 Copyright (c) 2011-2013 ARM Limited
screamer 0:66f3b5499f7f 4
screamer 0:66f3b5499f7f 5 Licensed under the Apache License, Version 2.0 (the "License");
screamer 0:66f3b5499f7f 6 you may not use this file except in compliance with the License.
screamer 0:66f3b5499f7f 7 You may obtain a copy of the License at
screamer 0:66f3b5499f7f 8
screamer 0:66f3b5499f7f 9 http://www.apache.org/licenses/LICENSE-2.0
screamer 0:66f3b5499f7f 10
screamer 0:66f3b5499f7f 11 Unless required by applicable law or agreed to in writing, software
screamer 0:66f3b5499f7f 12 distributed under the License is distributed on an "AS IS" BASIS,
screamer 0:66f3b5499f7f 13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
screamer 0:66f3b5499f7f 14 See the License for the specific language governing permissions and
screamer 0:66f3b5499f7f 15 limitations under the License.
screamer 0:66f3b5499f7f 16 """
screamer 0:66f3b5499f7f 17
screamer 0:66f3b5499f7f 18 from time import time
screamer 0:66f3b5499f7f 19
screamer 0:66f3b5499f7f 20 class WaitusTest():
screamer 0:66f3b5499f7f 21 """ This test is reading single characters from stdio
screamer 0:66f3b5499f7f 22 and measures time between their occurrences.
screamer 0:66f3b5499f7f 23 """
screamer 0:66f3b5499f7f 24 TICK_LOOP_COUNTER = 13
screamer 0:66f3b5499f7f 25 TICK_LOOP_SUCCESSFUL_COUNTS = 10
screamer 0:66f3b5499f7f 26 DEVIATION = 0.10 # +/-10%
screamer 0:66f3b5499f7f 27
screamer 0:66f3b5499f7f 28 def test(self, selftest):
screamer 0:66f3b5499f7f 29 test_result = True
screamer 0:66f3b5499f7f 30 # First character to start test (to know after reset when test starts)
screamer 0:66f3b5499f7f 31 if selftest.mbed.set_serial_timeout(None) is None:
screamer 0:66f3b5499f7f 32 return selftest.RESULT_IO_SERIAL
screamer 0:66f3b5499f7f 33 c = selftest.mbed.serial_read(1)
screamer 0:66f3b5499f7f 34 if c is None:
screamer 0:66f3b5499f7f 35 return selftest.RESULT_IO_SERIAL
screamer 0:66f3b5499f7f 36 if c == '$': # target will printout TargetID e.g.: $$$$1040e649d5c09a09a3f6bc568adef61375c6
screamer 0:66f3b5499f7f 37 #Read additional 39 bytes of TargetID
screamer 0:66f3b5499f7f 38 if selftest.mbed.serial_read(39) is None:
screamer 0:66f3b5499f7f 39 return selftest.RESULT_IO_SERIAL
screamer 0:66f3b5499f7f 40 c = selftest.mbed.serial_read(1) # Re-read first 'tick'
screamer 0:66f3b5499f7f 41 if c is None:
screamer 0:66f3b5499f7f 42 return selftest.RESULT_IO_SERIAL
screamer 0:66f3b5499f7f 43 start_serial_pool = time()
screamer 0:66f3b5499f7f 44 start = time()
screamer 0:66f3b5499f7f 45
screamer 0:66f3b5499f7f 46 success_counter = 0
screamer 0:66f3b5499f7f 47
screamer 0:66f3b5499f7f 48 for i in range(0, self.TICK_LOOP_COUNTER):
screamer 0:66f3b5499f7f 49 c = selftest.mbed.serial_read(1)
screamer 0:66f3b5499f7f 50 if c is None:
screamer 0:66f3b5499f7f 51 return selftest.RESULT_IO_SERIAL
screamer 0:66f3b5499f7f 52 delta = time() - start
screamer 0:66f3b5499f7f 53 deviation = abs(delta - 1)
screamer 0:66f3b5499f7f 54 # Round values
screamer 0:66f3b5499f7f 55 delta = round(delta, 2)
screamer 0:66f3b5499f7f 56 deviation = round(deviation, 2)
screamer 0:66f3b5499f7f 57 # Check if time measurements are in given range
screamer 0:66f3b5499f7f 58 deviation_ok = True if delta > 0 and deviation <= self.DEVIATION else False
screamer 0:66f3b5499f7f 59 success_counter = success_counter+1 if deviation_ok else 0
screamer 0:66f3b5499f7f 60 msg = "OK" if deviation_ok else "FAIL"
screamer 0:66f3b5499f7f 61 selftest.notify("%s in %.2f sec (%.2f) [%s]"% (c, delta, deviation, msg))
screamer 0:66f3b5499f7f 62 start = time()
screamer 0:66f3b5499f7f 63 if success_counter >= self.TICK_LOOP_SUCCESSFUL_COUNTS:
screamer 0:66f3b5499f7f 64 break
screamer 0:66f3b5499f7f 65 measurement_time = time() - start_serial_pool
screamer 0:66f3b5499f7f 66 selftest.notify("Consecutive OK timer reads: %d"% success_counter)
screamer 0:66f3b5499f7f 67 selftest.notify("Completed in %.2f sec" % (measurement_time))
screamer 0:66f3b5499f7f 68 test_result = True if success_counter >= self.TICK_LOOP_SUCCESSFUL_COUNTS else False
screamer 0:66f3b5499f7f 69 return selftest.RESULT_SUCCESS if test_result else selftest.RESULT_FAILURE