I2C

• I2cBytes(address, arrayWrite, writeCount, arrayRead, readCount) Reads and/or writes up to 4 bytes to/from I2C bus. Data is transfered from variables A, B, C, D. The return values (if any) are also stored in the same variables.
  address: I2C slave address
  arrayWrite: Array to send
  writeCount: The number of bytes to write
  arrayRead: Array to read
  readCount: The number of bytes to read

# Write 1 byte, read 6 bytes
dim a[1]
a[0] = 1
dim b[6]
i2cbytes(0x1c, a, 1, b, 6) 

• I2cStream(address, writeCount, readCount) -
  address: address of the I2C device
  writeCount:
  readCount:

The command is followed by the data stream. The stream starts with the host sending "writeCount" of bytes and then the host must read the "readCount". If either count is zero then that step can be skipped.

Note

On SC13 devices only: The I2C pins are different on BrainPad Pulse vs FEZ boards. PB15 is used to determine how I2C should work. Pay attention to the state of PB15 on power up, Pulse has it pulled up through 10k resistor.

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