64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
import unittest
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from migen import *
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from litex.soc.cores.timer import Timer
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class TestTimer(unittest.TestCase):
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def test_one_shot_software_polling(self):
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def generator(timer):
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clock_cycles = 25
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yield from timer._en.write(0)
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yield from timer._load.write(clock_cycles)
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yield from timer._reload.write(0)
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yield from timer._en.write(1)
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yield from timer._update_value.write(1)
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yield
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self.assertTrue((yield timer._value.status) > 0)
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while (yield timer._value.status) > 0:
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yield from timer._update_value.write(1)
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yield
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self.assertEqual((yield timer._value.status), 0)
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timer = Timer()
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run_simulation(timer, generator(timer))
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def test_periodic_timer_software_polling(self):
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def generator(timer):
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clock_cycles = 25
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yield from timer._en.write(0)
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yield from timer._load.write(0)
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yield from timer._reload.write(clock_cycles)
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yield from timer._en.write(1)
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yield from timer._update_value.write(1)
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yield
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self.assertTrue((yield timer._value.status) > 0)
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while (yield timer._value.status) > 0:
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yield from timer._update_value.write(1)
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yield
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# Ensure that the timer reloads
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self.assertEqual((yield timer._value.status), clock_cycles)
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timer = Timer()
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run_simulation(timer, generator(timer))
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def test_one_shot_timer_interrupts(self):
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def generator(timer):
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clock_cycles = 25
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yield from timer._en.write(0)
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yield from timer._load.write(clock_cycles)
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yield from timer._reload.write(0)
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yield from timer.ev.enable.write(1)
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self.assertEqual(1, (yield timer.ev.zero.trigger))
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yield from timer._en.write(1)
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while (yield timer.ev.zero.trigger != 0) and clock_cycles >= -5:
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yield
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clock_cycles -= 1
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self.assertEqual(0, (yield timer.ev.zero.trigger))
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timer = Timer()
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run_simulation(timer, generator(timer))
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