IoTGateway/BSP/Android/Gettingstarted/How to use UART

Overview

The Android/Linux UART/serial port access from user is through the tty-devices. The tty-devices have different names depending on UART driver on different board.

Configuration

The utility stty can configure the serial speed. Then the com port can be accessed as a file:

Check baudrate

# stty -F /dev/ttymxc1 115200

Read

#cat /dev/ttymxc1 &

Send

#echo test > /dev/ttymxc1 

Boards

ROM3420 Borad

COM Name	NXP/Freescale Name	Device	RS485 support
COM0	UART2	/dev/ttymxc1	Yes
COM1	UART4	/dev/ttymxc3	Yes
COM2	UART5	/dev/ttymxc4	Yes

 

ROM7421 Borad

COM Name	NXP/Freescale Name	Device	RS485 support
COM0	UART2	/dev/ttymxc1	No
COM1	UART4	/dev/ttymxc3	No

Test Sample

1. Click "Serial Port"

2. Click "Setup"

3. Click "Device" , and choose the used device(e.g. ttymxc1)

4. Click "Baud rate" , and choose the used baudrate(e.g. 115200)