Class_file&&Android应用调用方法

java代码调用 fos.write这里面是byte类型的

+    private static final String LEDBLPATH="/sys/class/hdyrodent_charger_led/brightness";
+    private final void SetChargerLedBrightness(String path,int brightness)
+    {
+        try{
+                java.io.FileOutputStream fos = new
+                java.io.FileOutputStream(new  java.io.File(path));
+                fos.write(String.valueOf(brightness).getBytes());
+                fos.flush();
+                fos.close();
+                Slog.e(TAG, "--------->SetChargerLedBrightness"+LEDBLPATH+"brightness"+brightness);
+             }catch(Exception e){
+             e.printStackTrace();
+         }
+    }
+    private static final String LEDFEPATH="/sys/class/hdyrodent_charger_led/frequency";
+    private final void SetChargerLedfrequency(String path,int frequency)
+    {
+        try{
+                java.io.FileOutputStream fos = new
+                java.io.FileOutputStream(new  java.io.File(path));
+                fos.write(String.valueOf(frequency).getBytes());
+                fos.flush();
+                fos.close();
+                Slog.e(TAG, "--------->SetChargerLedfrequency"+LEDFEPATH+"frequency"+frequency);
+             }catch(Exception e){
+             e.printStackTrace();
+         }
+    }

/*
* drivers/leds/leds-mt65xx.c
*
* This file is subject to the terms and conditions of the GNU General Public
* License.  See the file COPYING in the main directory of this archive for
* more details.
*
* Hydrodent weiqifa modify add
*
*/

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/leds.h>
#include <linux/leds-mt65xx.h>
#include <linux/workqueue.h>
#include <linux/wakelock.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
//#include <cust_leds.h>
//#include <cust_leds_def.h>
#include <mach/mt_pwm.h>
//#include <mach/mt_pwm_hal.h>
//#include <mach/mt_gpio.h>
#include <mach/pmic_mt6329_hw_bank1.h>
#include <mach/pmic_mt6329_sw_bank1.h>
#include <mach/pmic_mt6329_hw.h>
#include <mach/pmic_mt6329_sw.h>
#include <mach/upmu_common_sw.h>
#include <mach/upmu_hw.h>
//#include <mach/mt_pmic_feature_api.h>
//#include <mach/mt_boot.h>
#include <leds_hal.h>
//#include <linux/leds_hal.h>
#include "leds_drv.h"

static struct class *hdyrodent_pwm_class=NULL;
int show_value=123;
/****************************************************************************
* scnprintf是linux下面一个函数，这个函数把后面 的值格式话转化成字符串
* 并在adb 下面显示出来
***************************************************************************/
static ssize_t hdyrodent_pwm_show(struct device *dev,struct device_attribute *attr, char *buf)
{
printk("%s\n", __FUNCTION__);

return scnprintf(buf, PAGE_SIZE, "%d\n", show_value);
}
/****************************************************************************
* echo　pwm这个节点的时候就会调用下面这个函数，echo "12" > pwm
* 那么value的值就是12 可以通过这样设置pwm的数值
***************************************************************************/
static ssize_t hdyrodent_pwm_store(struct class *cls, struct class_attribute *attr, const  char *_buf, size_t _count)
{
int value=0;
sscanf(_buf, "%d", &value);
sscanf(_buf, "%d", &show_value);//把值传给show_value这样　cat的值就是echo 进去的值了
printk("%s: value: %d _count:%d\n", __FUNCTION__, value,_count);

return _count;
}

/****************************************************************************
* __ATTR的第一个参数是在sys文件系统里面显示的名字
　* ０６６６是这个节点的属性，0666表示是可读可写
　* hdyrodent_pwm_show 是cat 这个文件的时候调用的函数
　* hdyrodent_pwm_store 是echo的时候调用的函数
***************************************************************************/
static struct class_attribute hdyrodent_attr[] = {
__ATTR(pwm,0666, hdyrodent_pwm_show, hdyrodent_pwm_store),
__ATTR_NULL,

};

static int __init hdyrodent_pwm_init(void)
{
int ret;
int i = 0;

printk("%s start\n", __FUNCTION__);
//用class_create在sys/class/下面生成sys文件系统
hdyrodent_pwm_class=class_create(THIS_MODULE,"hdyrodent");
if(IS_ERR(hdyrodent_pwm_class))
{
printk("create hdyrodent module fail \n");
return PTR_ERR(hdyrodent_pwm_class);;
}

for (i = 0 ; NULL != attr_name(hdyrodent_attr[i]);i++)
{
ret = class_create_file(hdyrodent_pwm_class, &hdyrodent_attr[i]);
if (0 != ret)
{
printk("creat %s class file fail\n",attr_name(hdyrodent_attr[i]));
break;
}
}

printk("%s end\n", __FUNCTION__);

return 0;

}

static void __exit hdyrodent_pwm_exit(void)
{
int i = 0;

printk("hdyrodent module cleanup start.\n");
for (i = 0 ; NULL != attr_name(hdyrodent_attr[i]);i++)
{
class_remove_file(hdyrodent_pwm_class, &hdyrodent_attr[i]);
}
class_destroy(hdyrodent_pwm_class);
printk("hdyrodent module cleanup OK!\n");
}

MODULE_AUTHOR("329410527@qq.com");
MODULE_DESCRIPTION("HDYRODENT PWM MODULE");
MODULE_LICENSE("GPL");
MODULE_VERSION("ver0.1");

module_init(hdyrodent_pwm_init);
module_exit(hdyrodent_pwm_exit);