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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:
# ~52µs: main function arrived
# ~70µs: left function init_timer1
# ~133µs: OCRB compare event (1)
# ~170µs: count timer_ticks_compare_b
# ... OCRB event (1) repeated after 128µs = 261µs 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)
# next compare event after 128µs, check ticks and toggle pin
self.runAndCheckTicks(128000, "timer_ticks_compare_b", 2)
self.assertPin("B4", self._state_0)
# and next compare event after 128µs, check ticks and toggle pin
self.runAndCheckTicks(128000, "timer_ticks_compare_b", 3)
self.assertPin("B4", self._state_1)
# overflow tick should not count
self.assertWordValue("timer_ticks_overflow", 0)
if __name__ == '__main__':
from unittest import TextTestRunner
tests = SimTestLoader("timer_tX5_8bit_ctc_attiny25.elf").loadTestsFromTestCase(TestCase)
TextTestRunner(verbosity = 2).run(tests)
# EOF
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