diff --git a/11_key/.vscode/c_cpp_properties.json b/11_key/.vscode/c_cpp_properties.json
new file mode 100644
index 0000000000000000000000000000000000000000..7ee3d5b701c1010964e824eea25d2856aa3e67b5
--- /dev/null
+++ b/11_key/.vscode/c_cpp_properties.json
@@ -0,0 +1,21 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "includePath": [
+                "${workspaceFolder}/**",
+                "/home/youxiu/linux/linux-imx-rel_imx_4.1.15_2.1.0_ga/include/**", 
+                "/home/youxiu/linux/linux-imx-rel_imx_4.1.15_2.1.0_ga/arch/arm/include/**", 
+                "/home/youxiu/linux/linux-imx-rel_imx_4.1.15_2.1.0_ga/arch/arm/include/generated/**",
+                "/home/youxiu/linux/linux-imx-rel_imx_4.1.15_2.1.0_ga/drivers/**"
+            ],
+            "defines": [],
+            "compilerPath": "/usr/bin/clang",
+            "cStandard": "c11",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "clang-x64"
+        }
+    ],
+    "version": 4
+}
+
diff --git a/11_key/.vscode/settings.json b/11_key/.vscode/settings.json
new file mode 100644
index 0000000000000000000000000000000000000000..1a2a04ac7a2d6b080404235adcd34b94bc581cb4
--- /dev/null
+++ b/11_key/.vscode/settings.json
@@ -0,0 +1,21 @@
+{
+    "search.exclude": {
+        "**/node_modules": true,
+        "**/bower_components": true,
+        "**/*.o":true,
+        "**/*.su":true, 
+        "**/*.cmd":true,
+        "Documentation":true,      
+    },
+    "files.exclude": {
+        "**/.git": true,
+        "**/.svn": true,
+        "**/.hg": true,
+        "**/CVS": true,
+        "**/.DS_Store": true,  
+        "**/*.o":true,
+        "**/*.su":true, 
+        "**/*.cmd":true,
+        "Documentation":true, 
+    }
+}
\ No newline at end of file
diff --git a/11_key/11_key.code-workspace b/11_key/11_key.code-workspace
new file mode 100644
index 0000000000000000000000000000000000000000..f5bceea103bfd144b4918ccc83b822ec90b9f86d
--- /dev/null
+++ b/11_key/11_key.code-workspace
@@ -0,0 +1,10 @@
+{
+	"folders": [
+		{
+			"path": "."
+		}
+	],
+	"settings":{
+		
+		}
+}
\ No newline at end of file
diff --git a/11_key/Makefile b/11_key/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..c8ee05b84cf33c1e3a000ec7207f0049e91a91cb
--- /dev/null
+++ b/11_key/Makefile
@@ -0,0 +1,13 @@
+KERNELDIR := /home/youxiu/linux/linux-imx-rel_imx_4.1.15_2.1.0_ga
+CURRENT_PATH := $(shell pwd)
+obj-m := key.o
+
+build: kernel_modules
+
+kernel_modules:
+	$(MAKE) -C $(KERNELDIR) M=$(CURRENT_PATH) modules
+
+clean:
+	$(MAKE) -C $(KERNELDIR) M=$(CURRENT_PATH) clean
+
+
diff --git a/11_key/key.c b/11_key/key.c
new file mode 100644
index 0000000000000000000000000000000000000000..d8dc4c438628a483b731b0b42816a288bbdd72a3
--- /dev/null
+++ b/11_key/key.c
@@ -0,0 +1,136 @@
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/gpio.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_gpio.h>
+#include <asm/mach/map.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define KEY_CNT 1     /* 设备号个数 */
+#define KEY_NAME      "key"   /* 名字 */
+
+/* 定义按键值 */
+#define KEY0VALUE 0xF0   /* 按键值*/
+#define INVAKEY   0x00  /* 无效的按键值 */
+
+
+/* key设备结构体 */
+struct key_dev{
+    dev_t devid;           /* 设备号 */
+    struct cdev cdev;      /* cdev */
+    struct class *class;  /* 类 */
+    struct device *device;   /* 设备 */
+    int major;     /*  主设备号 */
+    int minor;     /* 次设备号 */
+    struct device_node *nd;    /* 设备节点 */
+    int key_gpio;
+    atomic_t keyvalue;         /* 按键值*/
+};
+
+struct key_dev keydev;
+
+static int key_open(struct inode *inode, struct file *filp)
+{
+    filp->private_data = &keydev;
+    keydev.nd = of_find_node_by_path("/key");
+    if(keydev.nd == NULL){
+        return -EINVAL;
+    }
+
+    keydev.key_gpio = of_get_named_gpio(keydev.nd, "key-gpio",0);
+    if(keydev.key_gpio < 0) {
+        printk("can't get key0\r\n");
+        return -EINVAL;
+    }
+    printk("key_gpio = %d\r\n", keydev.key_gpio);
+    /* 初始化key所使用的IO */
+    gpio_request(keydev.key_gpio, "key0");
+    gpio_direction_input(keydev.key_gpio);
+
+    return 0;
+}
+
+static ssize_t key_read(struct file *filp, char __user *buf,
+                        size_t cnt,loff_t *offt)
+{
+    int ret = 0;
+    unsigned char value;
+    struct key_dev *dev = filp->private_data;
+    if(gpio_get_value(dev->key_gpio) == 0){
+        while(!gpio_get_value(dev->key_gpio))
+            ;
+        atomic_set(&dev->keyvalue,KEY0VALUE);
+    }else{
+        atomic_set(&dev->keyvalue,INVAKEY);
+    }
+    value = atomic_long_read(&dev->keyvalue);
+    ret =  copy_to_user(buf,&value,sizeof(value));
+    return ret;
+}
+
+static struct file_operations key_fops = {
+    .owner	= THIS_MODULE,
+    .open	= key_open,
+    .read	= key_read,
+};
+
+static __init mykey_init(void)
+{
+    /* 初始化源自变量 */
+    atomic_set(&keydev.keyvalue,INVAKEY);
+    /* 注册字符设备驱动 */
+    /* 1、创建设备号 */
+    if(keydev.major){   /* 如果定义了设备号 */
+        keydev.devid = MKDEV(keydev.major,0);
+        register_chrdev_region(keydev.devid,KEY_CNT,KEY_NAME);
+    }else {    /* 没有定义设备号 */
+        alloc_chrdev_region(&keydev.devid,0,KEY_CNT,KEY_NAME);
+        keydev.major = MAJOR(keydev.devid);  /* 获取分配的主设备号 */
+        keydev.minor = MINOR(keydev.devid);  /* 获取分配的次设备号 */
+    }
+
+    /* 2、初始化cdev */
+    keydev.cdev.owner = THIS_MODULE;
+    cdev_init(&keydev.cdev,&key_fops);
+
+    /* 3、添加一个cdev */
+    cdev_add(&keydev.cdev,keydev.devid,KEY_CNT);
+    /* 4、创建类 */
+    keydev.class = class_create(THIS_MODULE,KEY_NAME);
+    if(IS_ERR(keydev.class)){
+        return PTR_ERR(keydev.class);
+    }
+
+    /* 5、创建设备 */
+    keydev.device = device_create(keydev.class,NULL,keydev.devid,NULL,KEY_NAME);
+    if(IS_ERR(keydev.device)){
+        return PTR_ERR(keydev.device);
+    }
+    
+    return 0;
+}
+
+static __exit mykey_exit(void)
+{
+    //注销字符设备驱动
+    gpio_free(keydev.key_gpio);
+    cdev_del(&keydev.cdev);
+    unregister_chrdev_region(keydev.devid,KEY_CNT);
+
+    device_destroy(keydev.class,keydev.devid);
+    class_destroy(keydev.class);
+}
+
+module_init(mykey_init);
+module_exit(mykey_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("zhangchaoliang");
diff --git a/11_key/keyApp.c b/11_key/keyApp.c
new file mode 100644
index 0000000000000000000000000000000000000000..52d7b5a163238c822a576ce89cb314644efa510d
--- /dev/null
+++ b/11_key/keyApp.c
@@ -0,0 +1,49 @@
+#include "stdio.h"
+#include "unistd.h"
+#include "sys/types.h"
+#include "sys/stat.h"
+#include "fcntl.h"
+#include "stdlib.h"
+#include "string.h"
+
+
+/* 定义按键值 */
+#define KEY0VALUE 0xF0
+#define INVAKEY   0x00
+
+
+/*
+
+*/
+int main(int argc, char *argv[]){
+	int fd, ret;
+	char *filename;
+	unsigned char keyvalue;
+	if (argc != 2) {
+		printf("Error Usage!\r\n");
+		return -1;
+	}
+	
+	filename = argv[1];
+	fd = open(filename, O_RDWR);
+	if(fd < 0) {
+		printf("file %s open failed\r\n",argv[1]);
+		return -1;
+	}
+
+	// 循环读取按键数据！
+	while(1){
+		read(fd,&keyvalue,sizeof(keyvalue));
+		if(keyvalue == KEY0VALUE) {
+			printf("KEY0 Press,value = %#x\r\n",keyvalue);// 按下
+		}
+	}
+
+	ret = close(fd);  // close文件
+	if(ret <0){
+		printf("file %s close failed\r\n",argv[1]);
+		return -1;
+	}
+
+	return 0;
+}