USB Gadget Serial Instructions for Use

Overview

USB Gadget Serial is a function that uses USB to simulate a serial port. The usage method is similar to that of an ordinary serial port.

Instructions

• Enable [*] Enable ttyACMx through USB in make menuconfig to open USB Gadget Serial.
• After connecting to PC, it will be recognized as ttyACMx and can be used as a normal serial port

  $ ll /dev/ttyACM*
  crw-rw---- 1 jialp dialout 166, 0 October 19 18:24 /dev/ttyACM0
  

• Refer to the compilation configuration configuration:

  configs/nationalchip_public_version/USB_GS_bypass_bin_demo.config
  

demo description

• The demo shows the basic sending and receiving functions, sending back the data received by USB Gadget Serial

  $ echo GS_test_1 > /dev/ttyACM0;cat /dev/ttyACM0
  GS_test_1
  $ echo GS_test_2 > /dev/ttyACM0;cat /dev/ttyACM0
  GS_test_2
  $ echo GS_test_3 > /dev/ttyACM0;cat /dev/ttyACM0
  GS_test_3
  

• GsOpen() is called in _SystemInit(), there is no need to call GsOpen() again