參考的驅動**如下
#include #include #include #include #include #include #include #include #include #define device_name "temp" //裝置名字
static struct cdev cdev;
struct class *tem_class;
static dev_t devno;
static int major = 243;
void tem_reset(void)
void tem_wbyte(unsigned char data)
udelay(60);
gpio_set_value(s3c64xx_gpn(8), 1);
udelay(15);
data >>= 1;
}gpio_set_value(s3c64xx_gpn(8), 1);
}unsigned char tem_rbyte(void)
udelay(60);
}s3c_gpio_cfgpin(s3c64xx_gpn(8), s3c_gpio_sfn(1));
return ret;
}static ssize_t tem_read(struct file *filp, char *buf, size_t len, loff_t *offset)
static struct file_operations tem_fops =
;static int __init tem_init(void)
cdev_init(&cdev, &tem_fops);
cdev.owner = this_module;
cdev.ops = &tem_fops;
result = cdev_add(&cdev, devno, 1);
if (result)
tem_class = class_create(this_module, "tmp_class");
if (is_err(tem_class))
device_create(tem_class, null, devno, device_name, device_name);
return 0;
fail2:
cdev_del(&cdev);
fail1:
unregister_chrdev_region(devno, 1);
return result;
}static void __exit tem_exit(void)
module_init(tem_init);
module_exit(tem_exit);
module_license("gpl");
module_author([email protected]);
#include "stdio.h"
#include "sys/types.h"
#include "sys/ioctl.h"
#include "stdlib.h"
#include "termios.h"
#include "sys/stat.h"
#include "fcntl.h"
#include "sys/time.h"
main()
else
close(fd);
}}
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