Greg Steiert / pegasus_dev

Development mbed library for MAX32630FTHR

Dependents:   blinky_max32630fthr

tools/host_tests/wait_us_auto.py@3:1198227e6421, 2016-12-16 (annotated)

Committer:
switches
Date:
Fri Dec 16 16:27:57 2016 +0000
Revision:
3:1198227e6421
Parent:
0:5c4d7b2438d3 
Changed ADC scale for MAX32625 platforms to 1.2V full scale to match MAX32630 platforms

Who changed what in which revision?

UserRevisionLine numberNew contents of line
switches 0:5c4d7b2438d3 1 """
switches 0:5c4d7b2438d3 2 mbed SDK
switches 0:5c4d7b2438d3 3 Copyright (c) 2011-2013 ARM Limited
switches 0:5c4d7b2438d3 4
switches 0:5c4d7b2438d3 5 Licensed under the Apache License, Version 2.0 (the "License");
switches 0:5c4d7b2438d3 6 you may not use this file except in compliance with the License.
switches 0:5c4d7b2438d3 7 You may obtain a copy of the License at
switches 0:5c4d7b2438d3 8
switches 0:5c4d7b2438d3 9 http://www.apache.org/licenses/LICENSE-2.0
switches 0:5c4d7b2438d3 10
switches 0:5c4d7b2438d3 11 Unless required by applicable law or agreed to in writing, software
switches 0:5c4d7b2438d3 12 distributed under the License is distributed on an "AS IS" BASIS,
switches 0:5c4d7b2438d3 13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
switches 0:5c4d7b2438d3 14 See the License for the specific language governing permissions and
switches 0:5c4d7b2438d3 15 limitations under the License.
switches 0:5c4d7b2438d3 16 """
switches 0:5c4d7b2438d3 17
switches 0:5c4d7b2438d3 18 from time import time
switches 0:5c4d7b2438d3 19
switches 0:5c4d7b2438d3 20 class WaitusTest():
switches 0:5c4d7b2438d3 21 """ This test is reading single characters from stdio
switches 0:5c4d7b2438d3 22 and measures time between their occurrences.
switches 0:5c4d7b2438d3 23 """
switches 0:5c4d7b2438d3 24 TICK_LOOP_COUNTER = 13
switches 0:5c4d7b2438d3 25 TICK_LOOP_SUCCESSFUL_COUNTS = 10
switches 0:5c4d7b2438d3 26 DEVIATION = 0.10 # +/-10%
switches 0:5c4d7b2438d3 27
switches 0:5c4d7b2438d3 28 def test(self, selftest):
switches 0:5c4d7b2438d3 29 test_result = True
switches 0:5c4d7b2438d3 30 # First character to start test (to know after reset when test starts)
switches 0:5c4d7b2438d3 31 if selftest.mbed.set_serial_timeout(None) is None:
switches 0:5c4d7b2438d3 32 return selftest.RESULT_IO_SERIAL
switches 0:5c4d7b2438d3 33 c = selftest.mbed.serial_read(1)
switches 0:5c4d7b2438d3 34 if c is None:
switches 0:5c4d7b2438d3 35 return selftest.RESULT_IO_SERIAL
switches 0:5c4d7b2438d3 36 if c == '$': # target will printout TargetID e.g.: $$$$1040e649d5c09a09a3f6bc568adef61375c6
switches 0:5c4d7b2438d3 37 #Read additional 39 bytes of TargetID
switches 0:5c4d7b2438d3 38 if selftest.mbed.serial_read(39) is None:
switches 0:5c4d7b2438d3 39 return selftest.RESULT_IO_SERIAL
switches 0:5c4d7b2438d3 40 c = selftest.mbed.serial_read(1) # Re-read first 'tick'
switches 0:5c4d7b2438d3 41 if c is None:
switches 0:5c4d7b2438d3 42 return selftest.RESULT_IO_SERIAL
switches 0:5c4d7b2438d3 43 start_serial_pool = time()
switches 0:5c4d7b2438d3 44 start = time()
switches 0:5c4d7b2438d3 45
switches 0:5c4d7b2438d3 46 success_counter = 0
switches 0:5c4d7b2438d3 47
switches 0:5c4d7b2438d3 48 for i in range(0, self.TICK_LOOP_COUNTER):
switches 0:5c4d7b2438d3 49 c = selftest.mbed.serial_read(1)
switches 0:5c4d7b2438d3 50 if c is None:
switches 0:5c4d7b2438d3 51 return selftest.RESULT_IO_SERIAL
switches 0:5c4d7b2438d3 52 delta = time() - start
switches 0:5c4d7b2438d3 53 deviation = abs(delta - 1)
switches 0:5c4d7b2438d3 54 # Round values
switches 0:5c4d7b2438d3 55 delta = round(delta, 2)
switches 0:5c4d7b2438d3 56 deviation = round(deviation, 2)
switches 0:5c4d7b2438d3 57 # Check if time measurements are in given range
switches 0:5c4d7b2438d3 58 deviation_ok = True if delta > 0 and deviation <= self.DEVIATION else False
switches 0:5c4d7b2438d3 59 success_counter = success_counter+1 if deviation_ok else 0
switches 0:5c4d7b2438d3 60 msg = "OK" if deviation_ok else "FAIL"
switches 0:5c4d7b2438d3 61 selftest.notify("%s in %.2f sec (%.2f) [%s]"% (c, delta, deviation, msg))
switches 0:5c4d7b2438d3 62 start = time()
switches 0:5c4d7b2438d3 63 if success_counter >= self.TICK_LOOP_SUCCESSFUL_COUNTS:
switches 0:5c4d7b2438d3 64 break
switches 0:5c4d7b2438d3 65 measurement_time = time() - start_serial_pool
switches 0:5c4d7b2438d3 66 selftest.notify("Consecutive OK timer reads: %d"% success_counter)
switches 0:5c4d7b2438d3 67 selftest.notify("Completed in %.2f sec" % (measurement_time))
switches 0:5c4d7b2438d3 68 test_result = True if success_counter >= self.TICK_LOOP_SUCCESSFUL_COUNTS else False
switches 0:5c4d7b2438d3 69 return selftest.RESULT_SUCCESS if test_result else selftest.RESULT_FAILURE