Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board
LT_I2C: Routines to Communicate With ATmega328P's hardware I2C port.

LT_I2C: Routines to communicate with ATmega328P's hardware I2C port. More...

Files

file  LT_I2C.cpp
 Library for LT_I2C: Routines to Communicate With ATmega328P's hardware I2C port.
 
file  LT_I2C.h
 LT_I2C: Routines to communicate with ATmega328P's hardware I2C port.
 
file  LT_I2C_Wire.h
 LT_I2C: Routines to communicate with ATmega328P's hardware I2C port.
 

Detailed Description

LT_I2C: Routines to communicate with ATmega328P's hardware I2C port.

LT_I2C contains the low level routines to communicate with devices using the
ATMega328's onboard hardware I2C port. Each routine checks the Two Wire Status
Register (TWSR) at the end of the transaction and returns 0 if successful and 1
if not successful.

I2C Frequency = (CPU Clock frequency)/(16+2(TWBR)*Prescaler)

TWBR-Two Wire Bit Rate Register
TWCR=Two Wire Control Register (TWINT TWEA TWSTA TWSTO TWWC TWEN - TWIE)
TWSR=Two Wire Status Register

Prescaler Values:
TWSR1  TWSR0  Prescaler
   0      0      1
   0      1      4
   1      0      16
   1      1      64

Examples:
CPU Frequency = 16Mhz on Arduino Uno
I2C Frequency  Prescaler  TWSR1  TWSR0  TWBR
  1khz         64         1      1      125
  10khz        64         1      1      12
  50khz        16         1      0      10
  100khz        4         0      1      18
  400khz        1         0      0      12

Copyright 2018(c) Analog Devices, Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.