51 lines
1.1 KiB
Python
51 lines
1.1 KiB
Python
|
# test I2C errors, with polling (disabled irqs) and DMA
|
||
|
|
|
||
|
|
import pyb
|
||
|
|
from pyb import I2C
|
||
|
|
|
||
|
|
# init accelerometer
|
||
|
|
pyb.Accel()
|
||
|
|
|
||
|
|
# get I2C bus
|
||
|
|
i2c = I2C(1, I2C.MASTER)
|
||
|
|
|
||
|
|
# 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
|