mirror of https://github.com/m-labs/artiq.git
test: add DMA test that checks the analyzer trace.
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@ -8,6 +8,8 @@ from math import sqrt
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from artiq.experiment import *
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from artiq.test.hardware_testbench import ExperimentCase
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from artiq.coredevice import exceptions
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from artiq.coredevice.comm_analyzer import (StoppedMessage, OutputMessage, InputMessage,
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decode_dump, get_analyzer_dump)
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artiq_low_latency = os.getenv("ARTIQ_LOW_LATENCY")
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@ -467,20 +469,21 @@ class _DMA(EnvExperiment):
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def build(self, trace_name="foobar"):
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self.setattr_device("core")
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self.setattr_device("core_dma")
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self.setattr_device("ttl0")
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self.setattr_device("ttl1")
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self.trace_name = trace_name
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@kernel
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def record(self):
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with self.core_dma.record(self.trace_name):
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delay(100*ns)
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self.ttl0.on()
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self.ttl1.on()
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delay(100*ns)
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self.ttl0.off()
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self.ttl1.off()
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@kernel
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def replay(self):
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self.core.break_realtime()
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delay(100*ms)
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self.core_dma.replay(self.trace_name)
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@kernel
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@ -509,4 +512,24 @@ class DMATest(ExperimentCase):
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with self.assertRaises(exceptions.DMAError):
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exp.nested()
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# TODO: check replay against analyzer
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def test_dma_trace(self):
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core_host = self.device_mgr.get_desc("comm")["arguments"]["host"]
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exp = self.create(_DMA)
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exp.record()
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get_analyzer_dump(core_host) # clear analyzer buffer
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exp.replay()
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dump = decode_dump(get_analyzer_dump(core_host))
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self.assertEqual(len(dump.messages), 3)
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self.assertIsInstance(dump.messages[-1], StoppedMessage)
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self.assertIsInstance(dump.messages[0], OutputMessage)
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self.assertEqual(dump.messages[0].channel, 1)
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self.assertEqual(dump.messages[0].address, 0)
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self.assertEqual(dump.messages[0].data, 1)
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self.assertIsInstance(dump.messages[1], OutputMessage)
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self.assertEqual(dump.messages[1].channel, 1)
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self.assertEqual(dump.messages[1].address, 0)
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self.assertEqual(dump.messages[1].data, 0)
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self.assertEqual(dump.messages[1].timestamp -
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dump.messages[0].timestamp, 100)
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