Cubieboard uart usage

##How To Use The Uart

About this Article

Author: allen — allen@cubietech.com — 2014/03/26 16:50 Copyrights: CC Attribution-Share Alike 3.0 Unported Contributors: Cubieboard Community :

http://docs.cubieboard.org/tutorials/common/how_to_use_the_uart

Abstract

Here is the guide to teach that how to enable the uart port on cubiboard and how to test the uart port is available .

Cubieboard pin

Cubietruck http://docs.cubieboard.org/a20-cubietruck_gpio_pin

Cubieboard 1 2 http://docs.cubieboard.org/cubieboard1_and_cubieboard2_gpio_pin

Fex Guide http://linux-sunxi.org/Fex_Guide

Open the port

    #mount /dev/nanda /mnt
    #cd /mnt
    #bin2fex  script.bin script.fex
    #vi script.fex

Modify the script.fex to open the uart3 ，uart4 as below ：

    [uart_para3]
    uart_used = 1
    uart_port = 3
    uart_type = 4
    uart_tx = port:PG06<4><1><default><default>
    uart_rx = port:PG07<4><1><default><default>
    uart_rts = port:PG08<4><1><default><default>
    uart_cts = port:PG09<4><1><default><default>

    [uart_para4]
    uart_used = 1
    uart_port = 4
    uart_type = 2
    uart_tx = port:PG10<4><1><default><default>
    uart_rx = port:PG11<4><1><default><default>
    Save the modification.

    #fex2bin script.fex  script.bin
    #reboot

After the reboot ,the uart3 and uart4 are available.

remember save as script.bin an