uart_edma_transfer#
Overview#
The uart_edma example shows how to use uart driver with EDMA:
In this example, one uart instance connect to PC through uart, the board will send back all characters that PC send to the board.
Note: The example echo every 8 characters, so input 8 characters every time.
Supported Boards#
FRDM-K22F
Hardware requirements
Mini/Micro USB cable
FRDM-K22F board
Personal Computer
Board settings
No special is needed.
Prepare the Demo
Connect a mini USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal on PC for OpenSDA serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Reset the SoC and run the project.
Running the demo
When the demo runs successfully, the log would be seen on the OpenSDA terminal like:
UART EDMA example
Send back received data
Echo every 8 characters
FRDM-KE17Z512
Hardware requirements
Micro USB cable
FRDM-KE17Z512 board
Personal Computer
USB to Com converter
Board settings
J4-10 connect to TxD of the USB to Com converter. J4-12 connect to RxD of the USB to Com converter. J3-14 connect to GND of the USB to Com converter
Prepare the Demo
Connect a USB cable between the host PC and the MCU-LINK USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
UART EDMA example
Send back received data
Echo every 8 characters
When you input 8 characters, system will echo it by UART and them would be seen on the MCU-LINK terminal.