应用调试-----输入模拟器之编写测试模拟功能

自定义print函数缓存打印数据到环形缓冲区

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触摸屏驱动源码：

#include "linux/errno.h"

#include "linux/kernel.h"

#include "linux/module.h"

#include "linux/slab.h"

#include "linux/input.h"

#include "linux/init.h"

#include "linux/serio.h"

#include "linux/delay.h"

#include "linux/platform_device.h"

#include "linux/clk.h"

#include "asm/io.h"

#include "asm/irq.h"

#include "asm/uaccess.h"

#include "asm/plat-s3c24xx/ts.h"

#include "asm/arch/regs-adc.h"

#include "asm/arch/regs-gpio.h"

struct s3c_ts_regs {

unsigned long adccon;

unsigned long adctsc;

unsigned long adcdly;

unsigned long adcdat0;

unsigned long adcdat1;

unsigned long adcupdn;

};

static struct input_dev *s3c_ts_dev;

static volatile struct s3c_ts_regs *s3c_ts_regs;

static struct timer_list ts_timer;

#define MYLOG_BUF_LEN (1024*1024)

#define INPUT_REPLAY 0

#define INPUT_TAG 1

static char *replay_buf;

static int replay_r = 0;

static int replay_w = 0;

static int major = 0;

static struct class *cls;

static struct timer_list replay_timer;

extern int myprintk(const char *fmt, ...);

static ssize_t replay_write(struct file * file, const char __user *buf, size_t size, loff_t *offset)

{

int err;

// 把应用程序传入的数据写入replay_buf //

if (replay_w + size "= MYLOG_BUF_LEN)

{

printk("replay_buf full!\n");

return -EIO;

}

err = copy_from_user(replay_buf + replay_w, buf, size);

if (err)

{

return -EIO;

}

else

{

replay_w += size;

}

return size;

}

// app: ioctl(fd, CMD, ..); //

static int replay_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)

{

char buf[100];

switch (cmd)

{

case INPUT_REPLAY:

{

// 启动回放: 根据replay_buf里的数据来上报事件 //

replay_timer.expires = jiffies + 1;

printk("replay_ioctl add_timer\n");

add_timer(&replay_timer);

break;

}

case INPUT_TAG:

{

copy_from_user(buf, (const void __user *)arg, 100);

buf[99] = \0;

myprintk("%s\n", buf);

break;

}

}

return 0;

}

// 返回值: 0 - 无数据 //

static int replay_get_line(char *line)

{

int i = 0;

// 吃掉前导的空格、回车符 //

while (replay_r "= replay_w)

{

if ((replay_buf[replay_r] == ) || (replay_buf[replay_r] == \n) || (replay_buf[replay_r] == \r) || (replay_buf[replay_r] == \t))

replay_r++;

else

break;

}

while (replay_r "= replay_w)

{

if ((replay_buf[replay_r] == \n) || (replay_buf[replay_r] == \r))

break;

else

{

line[i] = replay_buf[replay_r];

replay_r++;

i++;

}

}

line[i] = \0;

return i;

}

static void input_replay_timer_func(unsigned long data)

{

// 把replay_buf里的一些数据取出来上报

// 读出第1行数据, 确定time值, 上报第1行

// 继续读下1行数据, 如果它的time等于第1行的time, 上报

// 否则: mod_timer

//

unsigned int time;

unsigned int type;

unsigned int code;

int val;

static unsigned int pre_time = 0, pre_type = 0, pre_code = 0;

static int pre_val = 0;

static int cnt = 0;

char line[100];

int ret;

//printk("input_replay_timer_func : %d\n", cnt++);

if (pre_time != 0)

{

// 上报事件 //

input_event(s3c_ts_dev, pre_type, pre_code, pre_val);

}

while (1)

{

ret = replay_get_line(line);

if (ret == 0)

{

printk("end of input replay\n");

del_timer(&replay_timer);

pre_time = pre_type = pre_code = 0;

pre_val = 0;

replay_r = replay_w = 0;

break;

}

// 处理数据 //

time = 0;

type = 0;

code = 0;

val = 0;

sscanf(line, "%x %x %x %d", &time, &type, &code, &val);

//printk("%x %x %x %d\n", time, type, code, val);

if (!time && !type && !code && !val)

continue;

else

{

if ((pre_time == 0) || (time == pre_time))