本测试使用官方开发板,板上有八个led供使用,
测试使用了GPD6这个io口,用排线把这个口连接到其中一个led
命令如下:
- /mnt/nand1-1 # cd /sys/class/gpio/
- /sys/class/gpio # ls
- export gpiochip0 unexport
- /sys/class/gpio # echo 102 > export //102是怎么对应到GPD6的,请看下面的表格
- /sys/class/gpio # ls
- export gpio102 gpiochip0 unexport
- /sys/class/gpio # cd gpio102/
- /sys/class/gpio/gpio102 # ls
- active_low direction subsystem value
- device edge uevent
- /sys/class/gpio/gpio102 # echo out > direction
- /sys/class/gpio/gpio102 # echo 0 > value //led on
- /sys/class/gpio/gpio102 # echo 1 > value //lede off
- 1.
- * Note :
- * PORT NAME[PIN] = GPIO [id]
- *
- * PORTA[ 0] = gpio[ 0x00]
- * PORTA[ 1] = gpio[ 0x01]
- * :
- * PORTA[31] = gpio[ 0x1F]
- * PORTB[ 0] = gpio[ 0x20]
- * :
- * PORTB[31] = gpio[ 0x3F]
- * :
- * PORTC[ 0] = gpio[ 0x40]
- * :
- * PORTD[ 0] = gpio[ 0x60]
- * :
- * PORTE[ 0] = gpio[ 0x80]
- * ://注意:没有PORTF
- * PORTG[ 0] = gpio[ 0xA0]
- * :
- * PORTH[ 0] = gpio[ 0xC0]
- * :
- * :
- * PORTH[31] = gpio[ 0xDF]
- 102==0x66,这个就是GPD6
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