LINUX_GPIO
LINUX_GPIO
1. GPIO_SYSFS echo 1 > /sys/class/gpio/export(unexport) 导出(取消)控制的GPIO引脚编号
echo in(out) > /sys/class/gpio/gpio1/direction echo 1(0) > /sys/class/gpio/gpio1/value 写 cat /sys/class/gpio/gpio1/value 读
- 非中断引脚:
echo "none" > edge
- 上升沿触发:
echo "rising" > edge
- 下降沿触发:
echo "falling" > edge
- 边沿触发:
echo "both" > edge
2. int gpio_request(unsigned gpio,constchar* label) void gpio_free(unsigned gpio) int gpio_direction_input(unsigned gpio) int gpio_direction_output(unsigned gpio,int value) int gpio_get_value(unsigned gpio) void gpio_set_value(unsigned gpio,int value) int gpio_to_irq(unsigned gpio)
Stay hungry, stay foolish
待续。。。