class Beaglebone::I2CDevice
Object Oriented I2C
Implementation. This treats the I2C
device as an object.
Public Class Methods
Public Instance Methods
disable()
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Disable the specified I2C
device.
@note device trees cannot be unloaded at this time without kernel panic.
# File lib/beaglebone/i2c.rb, line 251 def disable I2C::disable(@i2c) end
file()
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Return the file descriptor to the open I2C
device
# File lib/beaglebone/i2c.rb, line 256 def file I2C::file(@i2c) end
read(address, bytes=1, register=nil)
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Read data from an I2C
device
@param address the address of the slave device @param bytes bytes to read @param register optional register to read from
@example
# read 3 big endian signed shorts starting at register 0x03 data = i2c.read(0x1e, 6, [0x03].pack("C*")) x,z,y = raw.unpack("s>*")
# File lib/beaglebone/i2c.rb, line 244 def read(address, bytes=1, register=nil) I2C::read(@i2c, address, bytes, register) end
write(address, data)
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Write data to an I2C
device
@param address the address of the slave device @param data the data to write
@return Integer the number of bytes written
@example
i2c.write(0x1e, [0x00, 0b10010000].pack("C*") )
# File lib/beaglebone/i2c.rb, line 230 def write(address, data) I2C::write(@i2c, address, data) end