linux输入子系统驱动按键程序示例代码

最新推荐文章于 2024-06-14 21:19:09 发布

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最新推荐文章于 2024-06-14 21:19:09 发布 · 330 阅读

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CC 4.0 BY-SA版权

这篇博客介绍了Linux输入子系统驱动程序的实现，包括一个名为input_sys_key_drv.c的驱动示例代码，以及对应的input_key_app.c应用程序代码。通过这些代码，读者可以了解到如何在Linux中处理按键输入事件。

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输入子系统驱动程序：
input_sys_key_drv.c

#include <linux/init.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/interrupt.h>//中断用的
#include <linux/gpio.h> //gpio接口函数

static struct input_dev *key_inputdev;
static int irqno;


// 设计一个对象--描述一个按键--属性(irq, gpio, 触发方式, 名字， 码值code(数字))
struct key_desc{
	char *name;
	int irqno;
	int gpio;
	int flags;
	int code;
};

struct key_desc  allkeys[] = {
	[0]= {
		.name = "key1_up",
		.irqno = IRQ_EINT(0), 
		.gpio = S5PV210_GPH0(0),
		.flags = IRQF_TRIGGER_FALLING|IRQF_TRIGGER_RISING,
		.code = KEY_UP,
	},

	[1] = {
		.name = "key2_down",
		.irqno = IRQ_EINT(1), 
		.gpio = S5PV210_GPH0(1),
		.flags = IRQF_TRIGGER_FALLING|IRQF_TRIGGER_RISING,
		.code = KEY_DOWN,
	},
	[2] = {
		.name = "key3_left",
		.irqno = IRQ_EINT(2), 
		.gpio = S5PV210_GPH0(2),
		.flags = IRQF_TRIGGER_FALLING|IRQF_TRIGGER_RISING,
		.code = KEY_LEFT,
	},
	[3] = {
		.name = "key4_right",
		.irqno = IRQ_EINT(3), 
		.gpio = S5PV210_GPH0(3),
		.flags = IRQF_TRIGGER_FALLING|IRQF_TRIGGER_RISING,
		.code = KEY_RIGHT,
	},
	[4] = {
		.name = "key3_enter",
		.irqno = IRQ_EINT(4), 
		.gpio = S5PV210_GPH0(4),
		.flags = IRQF_TRIGGER_FALLING|IRQF_TRIGGER_RISING,
		.code = KEY_ENTER,
	},
	[5] = {
		.name = "key3_ESC",
		.irqno = IRQ_EINT(5), 
		.gpio = S5PV210_GPH0(5),
		.flags = IRQF_TRIGGER_FALLING|IRQF_TRIGGER_RISING,
		.code = KEY_ESC,
	},
	[6]