Overview
========
This example works as two USB CDC ACM devices. It will appear as two USB serial devices on PC.
Toolchain supported
===================
- IAR embedded Workbench 9.20.2
- Keil MDK 5.36
- GCC ARM Embedded 10.3.1
- MCUXpresso 11.5.0
Hardware requirements
=====================
- Two Micro USB cables
- Target Board
- Personal Computer(PC)
Board settings
==============
This example only work with the USB high speed port (P9).
Prepare the Demo
================
1. Connect a USB Micro cable between the host PC and the Debug Link USB port (P6) on the target board.
2. Connect a USB Micro cable between the host PC and the on-board USB high speed port (P9).
3. Open a serial terminal on PC with the following settings:
- 115200 baud rate
- 8 data bits
- No parity
- 1 stop bit
- No flow control
4. Compile the demo.
5. Download the program to the target board.
6. Press the on-board RESET button to start the demo. A new USB serial device will appear on PC.
7. Open two serial terminal with the following settings for two new USB serial devices.
- 115200 baud rate
- 8 data bits
- No parity
- 1 stop bit
- No flow control
Running the demo
================
When the demo is running, the serial port of the Debug Link will output:
Start USBX device composite example...
Then, connect a USB cable between PC and the USB device port of the board.
Two USB serial devices will appear in the Device Manager of Windows.
And the serial port will output:
CDC ACM1 device activate
CDC ACM2 device activate
ACM1 device serial terminal, press any key, and it will display a string, for example:
fabcdef
gabcdef
3abcdef
ACM2 device serial terminal, press any key, and it will display a string, for example:
f123456
g123456
3123456
imi415
864dc66c9e
