linux-serial-test

Linux Serial Test Application

Usage

Usage: linux-serial-test [OPTION]

  -h, --help
  -b, --baud        Baud rate, 115200, etc (115200 is default)
  -p, --port        Port (/dev/ttyS0, etc) (must be specified)
  -d, --divisor     UART Baud rate divisor (can be used to set custom baud rates
  -R, --rx_dump     Dump Rx data (ascii, raw)
  -T, --detailed_tx Detailed Tx data
  -s, --stats       Dump serial port stats every 5s
  -a, --timing-byte output a double 0x80 to the serial port for measuring bit timimg
  -y, --single-bype send specified byte to the serial port 
  -z, --second-bype send another specified byte to the serial port 

Examples

Stress test a connection

linux-serial-test -s -p /dev/ttyO0 -b 3000000

This will send full bandwidth data with a counting pattern out the TX signal. On any data received on RX, the program will look for a counting pattern and report any missing data in the pattern.

Output a pattern where you can easily verify baud rate with scope:

linux-serial-test -y 0x55 -z 0x0 -p /dev/ttyO0 -b 3000000

This outputs 10 bits that are easy to measure, and then multiply by 10 in your head to get baud rate.

See the measure-baud-rate-example.png file in this project for an example.