#include?
#include?
#include?
#include?
#include?
#include?
#include?

#include?

static?struct?cdev?gec6818_chao_cdev;		//字符設(shè)備結(jié)構(gòu)體

static?dev_t	chao_num=0;					//設(shè)備號(hào)


static?struct?class?	*chaos_class;

static?struct?device?	*chaos_device;

static?void?__iomem		*gpiod_base_va;		//gpioe的虛擬地址基址
static?void?__iomem		*gpiod_out_va;		
static?void?__iomem		*gpiod_outenb_va;	
static?void?__iomem		*gpiod_altfn0_va;
static?void?__iomem		*gpiod_altfn1_va;	

static?int??gec6818_chao_open?（struct?inode?*?inode?struct?file?*file）
{
	printk（“gec6818_chao_open?\n“）;
	
	return?0;
}

static?int??gec6818_chao_release?（struct?inode?*?inode?struct?file?*file）
{
	printk（“gec6818_chao_release?\n“）;
	return?0;
}

static?ssize_t?gec6818_chao_write?（struct?file?*?file?const?char?__user?*?buf?size_t?len?loff_t?*?off）
{
	int?rt;
	
	int?v;
	
	char?kbuf[2]={0};

	//配置GPIOD15GPIOD19為輸出模式
	iowrite32（（ioread32（gpiod_altfn1_va）&（~（3<<6）））|（1<<6）gpiod_altfn1_va）;
	iowrite32（ioread32（gpiod_outenb_va）|（1<<19）gpiod_outenb_va）;
	
	iowrite32（ioread32（gpiod_altfn0_va）&（~（3<<30））gpiod_altfn0_va）;
	iowrite32（ioread32（gpiod_outenb_va）|（1<<15）gpiod_outenb_va）;	
	
	printk（“[gec6818_chao_write]len=%d\n“l(fā)en）;
	
	//判斷當(dāng)前l(fā)en是否合法
	if（len?>?sizeof?kbuf）
		return?-EINVAL;		//返回參數(shù)無效錯(cuò)誤碼
		
	//從用戶空間拷貝數(shù)據(jù)
	
	rt?=?copy_from_user（kbufbuflen）;
	
	if（rt?!=0?）
		return?-EFAULT;
	
	printk（“[gec6818_chao_write]kbuf[0]=%dkbuf[1]=%d\n“kbuf[0]kbuf[1]）;	
	
	switch（kbuf[0]）
	{
		case?5:		//D5
		{
			if（kbuf[1]==1）
			{
				v?=?ioread32（gpiod_out_va）;
				v?&=~（1<<15）;
				iowrite32（vgpiod_out_va）;
				
			}
			else?if（kbuf[1]==0）
			{
				v?=?ioread32（gpiod_out_va）;
				v?|=（1<<15）;
				iowrite32（vgpiod_out_va）;				
				
			}
			else
				return?-EINVAL;
		}break;

		case?9:		//D9
		{
			if（kbuf[1]==1）
			{
				v?=?ioread32（gpiod_out_va）;
				v?&=~（1<<19）;
				iowrite32（vgpiod_out_va）;
				
			}
			else?if（kbuf[1]==0）
			{
				v?=?ioread32（gpiod_out_va）;
				v?|=（1<<19）;
				iowrite32（vgpiod_out_va）;				
				
			}
			else
				return?-EINVAL;	
		}break;				
		
		default:
			return?-EINVAL;
	}
	return?len;
}

static?ssize_t?gec6818_chao_read?（struct?file?*file?char?__user?*buf?size_t?len?loff_t?*?offs）
{
	int?rt;
	
	char?key_val=0;
	

	
	//按鍵的狀態(tài)高電平-1，低電平-0
	//bit019的狀態(tài)
	//bit115的狀態(tài)
	
	
	//判斷當(dāng)前l(fā)en是否合法
	if（len?>?sizeof?key_val）
		return?-EINVAL;		//返回參數(shù)無效錯(cuò)誤碼
		
	key_val?=ioread32（gpiod_out_va）&（1<<19）???0:?1;	
	key_val|=ioread32（gpiod_out_va）&（1<<15）????0:（1<<1）;		
	
	//從內(nèi)核空間拷貝到用戶空間
	rt?=?copy_to_user（buf&key_vallen）;
	
	//獲取成功復(fù)制的字節(jié)數(shù)
	
	len?=?len?-?rt;
	
	
	//printk（“gec6818_key_read__user?buf[%s]len[%d]\n“buflen）;
	
	return?len;
	
	
}

static?const?struct?file_operations?gec6818_chao_fops?=?{
?	.owner?		=?THIS_MODULE
	.

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-11-05?19:08??1超聲波\
?????目錄???????????0??2018-11-06?09:35??1超聲波\demo3\
?????文件?????????374??2018-11-05?20:12??1超聲波\demo3\Makefile
?????文件????????6462??2018-11-06?16:00??1超聲波\demo3\chao_drv.c
?????文件???????82599??2018-11-05?20:19??1超聲波\demo3\chao_drv.ko
?????文件????????7023??2018-11-05?17:22??1超聲波\demo3\key_drv.c
?????文件???????81356??2018-11-05?20:19??1超聲波\demo3\key_drv.ko
?????文件????????8445??2018-11-06?15:55??1超聲波\demo3\led_drv.c
?????文件???????84166??2018-11-05?20:19??1超聲波\demo3\led_drv.ko
?????文件????????7156??2018-11-06?09:35??1超聲波\demo3\led_key_test
?????文件????????2118??2018-11-06?15:55??1超聲波\demo3\led_key_test.c
?????文件????????7352??2018-11-06?09:26??1超聲波\demo3\led_test
?????文件????????5641??2018-11-06?09:33??1超聲波\demo3\pp
?????文件??????????61??2018-11-06?09:33??1超聲波\demo3\pp.c