rw-i2c

I2C read-write script

Used for read/write data via the I2C bus with writing/reading from/to binary file.

Dependencies

• I2C Tools for Linux sudo apt install i2c-tools

Usage

• List all I2C buses in yur PC
  • sudo i2cdetect -l

Examples

• Read data from I2C device via bus i2c-1 on address 0xA0 and write them to file out.bin
  • rw-i2c -r -b 1 -c 0xA0 -f out.bin
• Write data to I2C device via bus i2c-2 on address 0x60 from file in.bin
  • rw-i2c -w -b 2 -c 0x60 -f in.bin
• Write data to I2C device via bus i2c-2 and device start address 0x10 from stdin
  • rw-i2c -w -b 2 -s 0x10
• Write data to I2C device via bus i2c-2 with byte osset 10 from file in.bin
  • rw-i2c -w -b 2 -o 10 -f in.bin
• Write data (10B) to I2C device via bus i2c-2 from file in.bin
  • rw-i2c -w -b 2 -l 10 -f in.bin
• Write data to I2C device via bus i2c-1 from file in.bin in quick (block) mode
  • rw-i2c -w -b 1 -q -f in.bin

The default chip address is 0x50.
The default start address is 0x00.
The default byte offset is 0B.
The default length is 128B.
The default transfer mode is sequential.

Exit codes

1: Argument parsing error
2: Neither R not W option was specified
3: Communication bus missing
4: In-out file handling error
5: Chip address format error
6: Length format error
7: Byte offset format error
8: Start address format error