49 lines
1.7 KiB
Python
49 lines
1.7 KiB
Python
# Basic smbus test. This is pretty ugly and meant to be run against a ADS1x15
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# and some output inspected by a Saleae logic analyzer. TODO: Refactor into
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# something that can test without hardware?
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import binascii
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import Adafruit_PureIO.smbus as smbus
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DEVICE_ADDR = 0x48
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REGISTER = 0x01
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# Test open and close.
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i2c = smbus.SMBus()
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i2c.open(1)
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val = i2c.read_byte(DEVICE_ADDR)
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print('read_byte from 0x{0:0X}: 0x{1:0X}'.format(REGISTER, val))
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i2c.close()
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# Test initializer open.
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i2c = smbus.SMBus(1)
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val = i2c.read_byte(DEVICE_ADDR)
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print('read_byte from 0x{0:0X}: 0x{1:0X}'.format(REGISTER, val))
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i2c.close()
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# Test various data reads.
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with smbus.SMBus(1) as i2c:
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val = i2c.read_byte(DEVICE_ADDR)
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print('read_byte from 0x{0:0X}: 0x{1:0X}'.format(REGISTER, val))
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val = i2c.read_byte_data(DEVICE_ADDR, REGISTER)
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print('read_byte_data from 0x{0:0X}: 0x{1:0X}'.format(REGISTER, val))
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val = i2c.read_word_data(DEVICE_ADDR, REGISTER)
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print('read_word_data from 0x{0:0X}: 0x{1:04X}'.format(REGISTER, val))
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val = i2c.read_i2c_block_data(DEVICE_ADDR, REGISTER, 2)
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print('read_i2c_block_data from 0x{0:0X}: 0x{1}'.format(REGISTER, binascii.hexlify(val)))
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# Test various data writes.
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with smbus.SMBus(1) as i2c:
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i2c.write_byte(DEVICE_ADDR, REGISTER)
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i2c.write_byte_data(DEVICE_ADDR, REGISTER, 0x85)
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i2c.write_word_data(DEVICE_ADDR, REGISTER, 0x8385)
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i2c.write_i2c_block_data(DEVICE_ADDR, REGISTER, [0x85, 0x83])
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#i2c.write_block_data(DEVICE_ADDR, REGISTER, [0x85, 0x83])
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i2c.write_quick(DEVICE_ADDR)
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# Process call test.
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with smbus.SMBus(1) as i2c:
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val = i2c.process_call(DEVICE_ADDR, REGISTER, 0x8385)
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print('process_call from 0x{0:0X}: 0x{1:04X}'.format(REGISTER, val))
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