mirror of https://github.com/m-labs/artiq.git
test_i2c: fix for missing readback
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@ -3,7 +3,7 @@ import os, unittest
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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.exceptions import I2CError
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from artiq.coredevice.i2c import I2CSwitch
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from artiq.coredevice.i2c import I2CSwitch, i2c_read_byte
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class I2CSwitchTest(EnvExperiment):
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@ -16,7 +16,9 @@ class I2CSwitchTest(EnvExperiment):
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passed = True
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for i in range(8):
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self.i2c_switch.set(i)
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if self.i2c_switch.readback() != 1 << i:
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# this will work only with pca9548 (like on kc705)
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# otherwise we cannot guarantee exact readback values
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if i2c_read_byte(self.i2c_switch.busno, self.i2c_switch.address) != 1 << i:
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passed = False
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self.set_dataset("passed", passed)
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