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