1.6 KiB
1.6 KiB
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
- Mini/micro USB cable
- EVK-MIMXRT1020 board
- Personal Computer(PC)
Board settings
No special settings are required.
Prepare the Demo
- Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
- Open a serial terminal with the following settings:
- 115200 baud rate
- 8 data bits
- No parity
- 1 stop bit
- No flow control
- Compile the demo with the configuration, "flexspi_nor_debug".
- Write the program to the flash of the target board.
- Press the reset button on your board to start the demo.
- Connect a USB cable between the PC and the USB device port of the board.
- PC can detect two USB ACM devices. 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