Wybox using shell scripts to detect if the IO port is normal

1. Modify the Mt7620a.dts file to define GPIO pin multiplexing as universal Gpio

/dts-v1/;/include/"Mt7620a.dtsi"/{compatible="Ralink,mt7620a-eval-board","Ralink,mt7620a-soc"; Model="Ralink mt7620a + mt7610e Evaluation Board"; [Email protected]10000000{gpio1: [email protected]638{Status="Okay";        }; Gpio2: [Email protected]660{Status="Okay";        }; Gpio3: [Email protected]688{Status="Okay";                        }; [Email protected] {Status="Okay"; [Email protected]0{#address-cells = <1>; #size-cells = <1>; Compatible="en25q64"; Reg= <0 0>; Linux,modalias="M25P80","en25q64"; SPI-max-frequency = <10000000>; [Email protected]0{Label="U-boot"; Reg= <0x0 0x30000>; Read-Only ;                }; [Email protected]30000{Label="u-boot-env"; Reg= <0x30000 0x10000>; Read-Only ;                }; Factory: [Email protected]40000{Label="Factory"; Reg= <0x40000 0x10000>; Read-Only ;                }; [Email protected]50000{Label="firmware"; Reg= <0x50000 0x1fb0000>;            };        };    };    }; Pinctrl {state_default:pinctrl0 {gpio {ralink,group="I²c","uartf","WDT","PA","Mdio",                 "RGMII1","PCIe","SPI REFCLK","ephy","ND_SD","Rgmii2","wled"; Ralink,function="Gpio";        };    };        }; [Email protected]10100000{MTD-mac-address = <&factory0x4>; Ralink,port-map ="LLLLW";    }; Gpio-keys-polled {compatible="Gpio-keys"; #address-cells = <1>; #size-cells = <0>; Poll-interval = < ->; S2 {Label="S2"; Gpios= <&gpio01 1>; Linux,code= <0x100>;        }; S3 {Label="S3"; Gpios= <&gpio02 1>; Linux,code= <0x101>;    }; };};

2, such as the drop shell script in the/root folder, named Test, followed by the following, you can set the Gpio0 ~ gpio72 to output, the output is low level.

#!/bin/SHCD/sys/class/Gpio forIinch 0`seq  the` Do        Echo$i >/sys/class/gpio/ExportEchoOut >./gpio$i/Direction #EchoOut >/sys/devices/10000000. palmbus/10000600. gpio/gpio/gpio$i/directionEcho 0>./gpio$i/value Done

[Email protected]:~# [email protected]:chmod777  Test[email protected]:~#. /test

3, can get the following pin can be used normally (hook):

Problem:

1, do not know Gpio7 is occupied by what, will appear the following questions

2, other can create Gpio io do not know why, manual typing command line does not respond, but the direct execution of the script command is effective.

Reference:

Http://blog.sina.com.cn/s/blog_9d074aae01012ytf.html

Wybox using shell scripts to detect if the IO port is normal