MCUXpresso_LPC55S69/boards/lpcxpresso55s69/azure_rtos_examples/usbx_device_composite_cdc_acm_cdc_acm/cm33_core0

Overview

This example works as two USB CDC ACM devices. It will appear as two USB serial devices on PC.

SDK version

• Version: 2.15.000

Toolchain supported

• IAR embedded Workbench 9.40.1
• Keil MDK 5.38.1
• GCC ARM Embedded 12.2
• MCUXpresso 11.8.0

Hardware requirements

• Two Micro USB cables
• Target Board
• Personal Computer(PC)

Board settings

This example can work with the USB high speed port (P9) or the USB full speed port (P10).

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. High speed: Connect a USB Micro cable between the host PC and the on-board USB high speed port (P9). Full speed: Connect a USB Micro cable between the host PC and the on-board USB full speed port (P10).
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:
   • High speed: Set USB_DEVICE_CONFIG_LPCIP3511FS to 0 and USB_DEVICE_CONFIG_LPCIP3511HS to 1 in usb_device_config.h
   • Full speed: Set USB_DEVICE_CONFIG_LPCIP3511FS to 1 and USB_DEVICE_CONFIG_LPCIP3511HS to 0 in usb_device_config.h
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