ON Semiconductor / mbed-os

Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

tools/host_tests/wait_us_auto.py@1:f30bdcd2b33b, 2017-02-27 (annotated)

Committer:
jacobjohnson
Date:
Mon Feb 27 17:45:05 2017 +0000
Revision:
1:f30bdcd2b33b
Parent:
0:098463de4c5d 
changed the inputscale from 1 to 7 in analogin_api.c.  This will need to be changed later, and accessed from the main level, but for now this allows the  adc to read a value from 0 to 3.7V, instead of just up to 1V.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-onsemi 0:098463de4c5d 1 """
group-onsemi 0:098463de4c5d 2 mbed SDK
group-onsemi 0:098463de4c5d 3 Copyright (c) 2011-2013 ARM Limited
group-onsemi 0:098463de4c5d 4
group-onsemi 0:098463de4c5d 5 Licensed under the Apache License, Version 2.0 (the "License");
group-onsemi 0:098463de4c5d 6 you may not use this file except in compliance with the License.
group-onsemi 0:098463de4c5d 7 You may obtain a copy of the License at
group-onsemi 0:098463de4c5d 8
group-onsemi 0:098463de4c5d 9 http://www.apache.org/licenses/LICENSE-2.0
group-onsemi 0:098463de4c5d 10
group-onsemi 0:098463de4c5d 11 Unless required by applicable law or agreed to in writing, software
group-onsemi 0:098463de4c5d 12 distributed under the License is distributed on an "AS IS" BASIS,
group-onsemi 0:098463de4c5d 13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-onsemi 0:098463de4c5d 14 See the License for the specific language governing permissions and
group-onsemi 0:098463de4c5d 15 limitations under the License.
group-onsemi 0:098463de4c5d 16 """
group-onsemi 0:098463de4c5d 17
group-onsemi 0:098463de4c5d 18 from time import time
group-onsemi 0:098463de4c5d 19
group-onsemi 0:098463de4c5d 20 class WaitusTest():
group-onsemi 0:098463de4c5d 21 """ This test is reading single characters from stdio
group-onsemi 0:098463de4c5d 22 and measures time between their occurrences.
group-onsemi 0:098463de4c5d 23 """
group-onsemi 0:098463de4c5d 24 TICK_LOOP_COUNTER = 13
group-onsemi 0:098463de4c5d 25 TICK_LOOP_SUCCESSFUL_COUNTS = 10
group-onsemi 0:098463de4c5d 26 DEVIATION = 0.10 # +/-10%
group-onsemi 0:098463de4c5d 27
group-onsemi 0:098463de4c5d 28 def test(self, selftest):
group-onsemi 0:098463de4c5d 29 test_result = True
group-onsemi 0:098463de4c5d 30 # First character to start test (to know after reset when test starts)
group-onsemi 0:098463de4c5d 31 if selftest.mbed.set_serial_timeout(None) is None:
group-onsemi 0:098463de4c5d 32 return selftest.RESULT_IO_SERIAL
group-onsemi 0:098463de4c5d 33 c = selftest.mbed.serial_read(1)
group-onsemi 0:098463de4c5d 34 if c is None:
group-onsemi 0:098463de4c5d 35 return selftest.RESULT_IO_SERIAL
group-onsemi 0:098463de4c5d 36 if c == '$': # target will printout TargetID e.g.: $$$$1040e649d5c09a09a3f6bc568adef61375c6
group-onsemi 0:098463de4c5d 37 #Read additional 39 bytes of TargetID
group-onsemi 0:098463de4c5d 38 if selftest.mbed.serial_read(39) is None:
group-onsemi 0:098463de4c5d 39 return selftest.RESULT_IO_SERIAL
group-onsemi 0:098463de4c5d 40 c = selftest.mbed.serial_read(1) # Re-read first 'tick'
group-onsemi 0:098463de4c5d 41 if c is None:
group-onsemi 0:098463de4c5d 42 return selftest.RESULT_IO_SERIAL
group-onsemi 0:098463de4c5d 43 start_serial_pool = time()
group-onsemi 0:098463de4c5d 44 start = time()
group-onsemi 0:098463de4c5d 45
group-onsemi 0:098463de4c5d 46 success_counter = 0
group-onsemi 0:098463de4c5d 47
group-onsemi 0:098463de4c5d 48 for i in range(0, self.TICK_LOOP_COUNTER):
group-onsemi 0:098463de4c5d 49 c = selftest.mbed.serial_read(1)
group-onsemi 0:098463de4c5d 50 if c is None:
group-onsemi 0:098463de4c5d 51 return selftest.RESULT_IO_SERIAL
group-onsemi 0:098463de4c5d 52 delta = time() - start
group-onsemi 0:098463de4c5d 53 deviation = abs(delta - 1)
group-onsemi 0:098463de4c5d 54 # Round values
group-onsemi 0:098463de4c5d 55 delta = round(delta, 2)
group-onsemi 0:098463de4c5d 56 deviation = round(deviation, 2)
group-onsemi 0:098463de4c5d 57 # Check if time measurements are in given range
group-onsemi 0:098463de4c5d 58 deviation_ok = True if delta > 0 and deviation <= self.DEVIATION else False
group-onsemi 0:098463de4c5d 59 success_counter = success_counter+1 if deviation_ok else 0
group-onsemi 0:098463de4c5d 60 msg = "OK" if deviation_ok else "FAIL"
group-onsemi 0:098463de4c5d 61 selftest.notify("%s in %.2f sec (%.2f) [%s]"% (c, delta, deviation, msg))
group-onsemi 0:098463de4c5d 62 start = time()
group-onsemi 0:098463de4c5d 63 if success_counter >= self.TICK_LOOP_SUCCESSFUL_COUNTS:
group-onsemi 0:098463de4c5d 64 break
group-onsemi 0:098463de4c5d 65 measurement_time = time() - start_serial_pool
group-onsemi 0:098463de4c5d 66 selftest.notify("Consecutive OK timer reads: %d"% success_counter)
group-onsemi 0:098463de4c5d 67 selftest.notify("Completed in %.2f sec" % (measurement_time))
group-onsemi 0:098463de4c5d 68 test_result = True if success_counter >= self.TICK_LOOP_SUCCESSFUL_COUNTS else False
group-onsemi 0:098463de4c5d 69 return selftest.RESULT_SUCCESS if test_result else selftest.RESULT_FAILURE