cubieboard2的gpio使用方法

标准串口设置

[uart_para0]

uart_used = 1

uart_port = 0

uart_type = 2

uart_tx = port:PB22<2><1><default><default>

uart_rx = port:PB23<2><1><default><default>

[uart_para1]

uart_used = 0

uart_port = 1

uart_type = 8

uart_tx = port:PA10<4><1><default><default>

uart_rx = port:PA11<4><1><default><default>

uart_rts = port:PA12<4><1><default><default>

uart_cts = port:PA13<4><1><default><default>

uart_dtr = port:PA14<4><1><default><default>

uart_dsr = port:PA15<4><1><default><default>

uart_dcd = port:PA16<4><1><default><default>

uart_ring = port:PA17<4><1><default><default>

[uart_para2]

uart_used = 0

uart_port = 2

uart_type = 4

uart_tx = port:PI18<3><1><default><default>

uart_rx = port:PI19<3><1><default><default>

uart_rts = port:PI16<3><1><default><default>

uart_cts = port:PI17<3><1><default><default>

[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>

[uart_para5]

uart_used = 1

uart_port = 5

uart_type = 2

uart_tx = port:PI10<3><1><default><default>

uart_rx = port:PI11<3><1><default><default>

[uart_para6]

uart_used = 1

uart_port = 6

uart_type = 2

uart_tx = port:PI12<3><1><default><default>

uart_rx = port:PI13<3><1><default><default>

[uart_para7]

uart_used = 0

uart_port = 7

uart_type = 2

uart_tx = port:PA14<4><1><default><default>

uart_rx = port:PA15<4><1><default><default>

fex文件修改
http://linux-sunxi.org/Fex_Guide#disp_init_configuration
gpio管脚逻辑设置表
http://linux-sunxi.org/A10/PIO#PD12
物理管脚地址
http://docs.cubieboard.org/cubieboard1_and_cubieboard2_gpio_pin http://linux-sunxi.org/Cubieboard/ExpansionPorts 
总结，cubieboard的gpio设置使用了三层结构，物理层export，逻辑层mux2，应用层script.bin

port:PA15/*物理地址*/<4>/*逻辑功能设置mux*/<1><default><default>