root@cubieboard:/sys/class/gpio# echo 4 > /sys/class/gpio/export root@cubieboard:/sys/class/gpio# ls export gpio4_pi7 gpiochip1 unexport root@cubieboard:/sys/class/gpio#
directioneboard:/sys/class/gpio/gpio4_pi7# echo out > /sys/class/gpio/gpio4_pi7/d root@cubieboard:/sys/class/gpio/gpio4_pi7# cat direction out root@cubieboard:/sys/class/gpio/gpio4_pi7#
root@cubieboard:/sys/class/gpio/gpio4_pi7# cat value 1 root@cubieboard:/sys/class/gpio/gpio4_pi7#
root@cubieboard:/sys/class/gpio/gpio4_pi7# cat value 0 root@cubieboard:/sys/class/gpio/gpio4_pi7#
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ahha007 发表于 2014-4-8 19:16 不错哦。。有没有在GPIO上加一个限流电阻啊??
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