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# -*- coding: UTF-8 -*-
from simtestutil import SimTestCase, SimTestLoader
class TestCase(SimTestCase):
def runAndCheckTicks(self, runtime, label, value):
self.sim.doRun(self.sim.getCurrentTime() + runtime)
self.assertWordValue(label, value)
def assertPin(self, name, value):
self.assertEqual(self.dev.GetPin(name).toChar(), value)
_state_0 = "L" # active driven, LOW
_state_1 = "H" # active driven, HIGH
_state_t = "t" # tristate
# time sheet:
# ~51µs: main function arrived
# ~66µs: left function init_timer1
# ~129µs: OCRB compare event (1)
# ~160µs: count timer_ticks_compare_b
# ~322µs: timer overflow event
# ~352µs: count timer_ticks_overflow and toggle pin
# ... OCRB event (1) repeated after 256µs = 385µs and so one ...
def test_00(self):
"""check counting"""
self.assertDevice()
self.dev.SetClockFreq(1000) # clock with factory default is 1MHz
self.assertStartTime()
# skip initialisation
self.assertInitDone(limit=55000) # about 66us till init_timer1 done
# check timer_ticks_overflow and timer_ticks_compare_b after initialisation
self.assertWordValue("timer_ticks_overflow", 0)
self.assertWordValue("timer_ticks_compare_b", 0)
self.assertPin("B4", self._state_t)
# check timer compare channel B and if pin is set
self.runAndCheckTicks(120000, "timer_ticks_compare_b", 1)
self.assertPin("B4", self._state_1)
# overflow should not happen till here
self.runAndCheckTicks(170000, "timer_ticks_overflow", 0)
self.assertPin("B4", self._state_1)
# but should happen till here
self.runAndCheckTicks(20000, "timer_ticks_overflow", 1)
self.assertPin("B4", self._state_0)
# next cycle, start with compare event
self.runAndCheckTicks(60000, "timer_ticks_compare_b", 2)
self.assertPin("B4", self._state_1)
# no overflow till here
self.runAndCheckTicks(180000, "timer_ticks_overflow", 1)
self.assertPin("B4", self._state_1)
# but till here
self.runAndCheckTicks(20000, "timer_ticks_overflow", 2)
self.assertPin("B4", self._state_0)
if __name__ == '__main__':
from unittest import TextTestRunner
tests = SimTestLoader("timer_tX5_8bit_normal_attiny25.elf").loadTestsFromTestCase(TestCase)
TextTestRunner(verbosity = 2).run(tests)
# EOF
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