README.md

I2C Scan

Simple I2C utility for scanning addresses on a given bus just like i2cdetect from i2c-tools but with a different approach. This utility was created from i2cdetect's inability to detect all addresses on a given bus, in this utility we write to each address on a given bus to determine if is alive therefore available for communication.

There is a plan to make use of this on AVR and STM32 based devices but I haven't gotten around to it yet.

Usage

$ i2cscan -h

Available options:
   -h help
   -v version
   -l lists all available I2C busses (TODO)
   -f fetch all busses & available addresses (TODO)
   -b [BUS] specify I2C bus
   -a scan all addresses
   -r [FIRST-LAST] scan addresses between FIRST & LAST (int)
   ** For MCUs ** (TODO)
   -mmcu= [MCU]
   Supported MCUs :
       - atmega328
       - atmega2560
   -dev [DEVICE]

• Scan I2C bus /dev/i2c-1 for any available addresses:

  $ i2cscan -b 1 -a
  Scanning all addresses 0 to 127
  Found device at I2C address 0x28
  Found device at I2C address 0x29
  Found device at I2C address 0x53
  Found device at I2C address 0x68
  Found device at I2C address 0x76

• Scan I2C bus /dev/i2c-1 for addresses between 0x28(40) - 0x2a(42):

  $ i2cscan -b 1 -r 40-42
  Scanning all addresses 40 to 42
  Found device at I2C address 0x28
  Found device at I2C address 0x29

Installation

Linux Dependencies

• gcc

AVR dependencies

• avr-libc
• gcc-avr
• binutils-avr
• avrdude

# install
$ sudo make install
# uninstall
$ sudo make uninstall