Difference between revisions of "IoTGateway/BSP/Android/Gettingstarted/How to use UART"

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<span lang="en"><font color="#000000">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.</font></span><br/><span style="color: rgb(0, 0, 205);"><span style="font-size: large;">'''2. Configuration'''</span></span>
 
<span lang="en"><font color="#000000">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.</font></span><br/><span style="color: rgb(0, 0, 205);"><span style="font-size: large;">'''2. Configuration'''</span></span>
  
<span lang="en"><font color="#000000">The utility stty can configure the serial speed. Then the com port can be accessed as a file:</font></span>  
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<span lang="en"><font color="#000000">The utility stty can configure the serial speed. Then the com port can be accessed as a file:</font></span>
  
 
Check baudrate
 
Check baudrate
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[[File:ROM3420 COM.png|252x213px]]
  
 
3.2 ROM7421 Borad
 
3.2 ROM7421 Borad

Revision as of 09:32, 25 January 2017

1. 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.
2. 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 

3. Boards

3.1 ROM3420 Borad

COM Name NXP/Freescale Name Device

RS485 support

COM0 UART2

/dev/ttymxc1

No

COM1 UART4

/dev/ttymxc3

No

COM2 UART5

/dev/ttymxc4

No







 

ROM3420 COM.png

3.2 ROM7421 Borad

COM Name NXP/Freescale Name Device

RS485 support

COM0 UART2

/dev/ttymxc1

Yes

COM1 UART4

/dev/ttymxc3

Yes