55 lines
1.2 KiB
Python
55 lines
1.2 KiB
Python
# test I2C errors, with polling (disabled irqs) and DMA
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import pyb
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from pyb import I2C
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if not hasattr(pyb, 'Accel'):
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print('SKIP')
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raise SystemExit
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# init accelerometer
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pyb.Accel()
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# get I2C bus
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i2c = I2C(1, I2C.MASTER, dma=True)
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# test polling mem_read
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pyb.disable_irq()
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i2c.mem_read(1, 76, 0x0a) # should succeed
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pyb.enable_irq()
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try:
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pyb.disable_irq()
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i2c.mem_read(1, 77, 0x0a) # should fail
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except OSError as e:
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pyb.enable_irq()
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print(repr(e))
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i2c.mem_read(1, 76, 0x0a) # should succeed
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# test polling mem_write
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pyb.disable_irq()
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i2c.mem_write(1, 76, 0x0a) # should succeed
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pyb.enable_irq()
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try:
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pyb.disable_irq()
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i2c.mem_write(1, 77, 0x0a) # should fail
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except OSError as e:
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pyb.enable_irq()
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print(repr(e))
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i2c.mem_write(1, 76, 0x0a) # should succeed
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# test DMA mem_read
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i2c.mem_read(1, 76, 0x0a) # should succeed
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try:
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i2c.mem_read(1, 77, 0x0a) # should fail
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except OSError as e:
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print(repr(e))
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i2c.mem_read(1, 76, 0x0a) # should succeed
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# test DMA mem_write
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i2c.mem_write(1, 76, 0x0a) # should succeed
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try:
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i2c.mem_write(1, 77, 0x0a) # should fail
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except OSError as e:
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print(repr(e))
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i2c.mem_write(1, 76, 0x0a) # should succeed
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