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发表于 2012-9-6 16:01:41
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回复 1# dglwx
4， 应用程序按键驱动测试
测试驱动源代码：
[guowenxue@centos6 test]$ cat event_button.c
/******************************************************************************
* Copyright: (C) 2012 Guo Wenxue<Email:guowenxue@gmail.com QQ:281143292>
* All rights reserved.
*
* Filename: event_button.c
* Description: This file used to test GPIO button driver builtin Linux kernel on ARM board
*
* Version: 1.0.0(07/13/2012~)
* Author: Guo Wenxue <guowenxue@gmail.com>
* ChangeLog: 1, Release initial version on "07/13/2012 02:46:18 PM"
*
******************************************************************************/
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <libgen.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <linux/input.h>
#include <linux/kd.h>
#include <linux/keyboard.h>
#if 0 /* Just for comment here, Reference to linux-3.3/include/linux/input.h */
struct input_event
{
struct timeval time;
__u16 type; /* 0x00:EV_SYN 0x01:EV_KEY 0x04:EV_MSC 0x11:EV_LED*/
__u16 code; /* key value, which key */
__s32 value; /* 1: Pressed 0:Not pressed 2:Always Pressed */
};
#endif
#define TRUE 1
#define FALSE 0
#define EV_RELEASED 0
#define EV_PRESSED 1
#define EV_REPEAT 2
#define BUTTON_CNT 1
#define MODE_POLL 0x01
#define MODE_NORMAL 0x02
void usage(char *name);
void display_button_event(struct input_event *ev, int cnt);
int main(int argc, char **argv)
{
char *kbd_dev = NULL;
char kbd_name[256] = "Unknown";
int kbd_fd = -1;
int rv, opt;
int mode = MODE_NORMAL;
int size = sizeof (struct input_event);
struct input_event ev[BUTTON_CNT];
struct option long_options[] = {
{"device", required_argument, NULL, 'd'},
{"poll", no_argument, NULL, 'p'},
{"help", no_argument, NULL, 'h'},
{NULL, 0, NULL, 0}
};
while ((opt = getopt_long(argc, argv, "d:ph", long_options, NULL)) != -1)
{
switch (opt)
{
case 'd':
kbd_dev = optarg;
break;
case 'p':
mode = MODE_POLL;
break;
case 'h':
usage(argv[0]);
return 0;
default:
break;
}
}
if(NULL == kbd_dev)
{
usage(argv[0]);
return -1;
}
if ((getuid ()) != 0)
printf ("You are not root! This may not work...\n");
if ((kbd_fd = open(kbd_dev, O_RDONLY)) < 0)
{
printf("Open %s failure: %s", kbd_dev, strerror(errno));
return -1;
}
ioctl (kbd_fd, EVIOCGNAME (sizeof (kbd_name)), kbd_name);
printf ("Monitor input device %s (%s) event with %s mode:\n", kbd_dev, kbd_name, MODE_POLL==mode?"poll":"infilit loop");
#if 0 /* Not implement in the Linux GPIO button driver */
unsigned char key_b[BUTTON_CNT/8 + 1];
memset(key_b, 0, sizeof(key_b));
if(ioctl(kbd_fd, EVIOCGKEY(sizeof(key_b)), key_b) < 0)
{
printf("EVIOCGKEY ioctl get error: %s\n", strerror(errno));
return -1;
}
#endif
#if 0 /* Not implement in the Linux GPIO button driver */
/* rep[0]表示在按键重复出现之前 delay的时间,rep[1]表示按键重复出现的时间间隔。 */
int rep[2] ={2500, 1000} ;
if(ioctl(kbd_fd, EVIOCSREP, rep) < 0)
{
printf("EVIOCSREP ioctl get error: %s\n", strerror(errno));
return -1;
}
if(ioctl(kbd_fd, EVIOCGREP, rep) < 0)
{
printf("EVIOCGKEY ioctl get error: %s\n", strerror(errno));
return -1;
}
else
{
printf("repeate speed: [0]= %d, [1] = %d/n", rep[0], rep[1]);
}
#endif
while (1)
{
if(MODE_POLL==mode)
{
fd_set rds;
FD_ZERO(&rds);
FD_SET(kbd_fd, &rds);
rv = select(kbd_fd + 1, &rds, NULL, NULL, NULL);
if (rv < 0)
{
printf("Select() system call failure: %s\n", strerror(errno));
goto CleanUp;
}
else if (FD_ISSET(kbd_fd, &rds))
{
if ((rv = read (kbd_fd, ev, size*BUTTON_CNT )) < size)
{
printf("Reading data from kbd_fd failure: %s\n", strerror(errno));
break;
}
else
{
display_button_event(ev, rv/size);
}
}
}
else
{
if ((rv = read (kbd_fd, ev, size*BUTTON_CNT )) < size)
{
printf("Reading data from kbd_fd failure: %s\n", strerror(errno));
break;
}
else
{
display_button_event(ev, rv/size);
}
}
}
CleanUp:
close(kbd_fd);
return 0;
}
void usage(char *name)
{
char *progname = NULL;
char *ptr = NULL;
ptr = strdup(name);
progname = basename(ptr);
printf("Usage: %s [-p] -d <device>\n", progname);
printf(" -d[device ] button device name\n");
printf(" -p[poll ] Use poll mode, or default use infinit loop.\n");
printf(" -h[help ] Display this help information\n");
free(ptr);
return;
}
void display_button_event(struct input_event *ev, int cnt)
{
int i;
struct timeval pressed_time, duration_time;
for(i=0; i<cnt; i++)
{
//printf("type:%d code:%d value:%d\n", ev.type, ev.code, ev.value);
if(EV_KEY==ev.type && EV_PRESSED==ev.value)
{
if(BTN_1 == ev.code)
{
pressed_time = ev.time;
//pressed_time.tv_sec = ev.time.tv_sec;
//pressed_time.tv_usec = ev.time.tv_usec;
printf("Restore button key pressed time: %ld.%ld\n", pressed_time.tv_sec, pressed_time.tv_usec);
}
}
if(EV_KEY==ev.type && EV_RELEASED==ev.value)
{
if(BTN_1 == ev.code)
{
timersub(&ev.time, &pressed_time, &duration_time);
printf("Restore button key released time: %ld.%ld\n", ev.time.tv_sec, ev.time.tv_usec);
printf("Restore button key duration time: %ld.%ld\n", duration_time.tv_sec, duration_time.tv_usec);
}
}
} /* for(i=0; i<cnt; i++) */
}
编译，测试结果：
X86上编译：
[guowenxue@centos6 test]$ /opt/buildroot-2011.11/arm926t/usr/bin/arm-linux-gcc -o event_button event_button.c -Wall -Werror --static
[guowenxue@centos6 test]$ file event_button
event_button: ELF 32-bit LSB executable, ARM, version 1 (SYSV), statically linked, not stripped
[guowenxue@centos6 test]$ cp event_button /tftp/
ARM开发板通过tftp下载并做测试：
/tmp >: tftp -gr event_button 192.168.1.78
event_button 100% |*******************************| 123k 0:00:00 ETA
/tmp >: chmod 777 event_button
/tmp >: ./event_button -h
Usage: event_button [-p] -d <device>
-d[device ] button device name
-p[poll ] Use poll mode, or default use infinit loop.
-h[help ] Display this help information
/tmp >: ./event_button -p -d /dev/event0
Monitor input device /dev/event0 (gpio-keys) event with poll mode:
Restore button key pressed time: 1346917034.192994
Restore button key released time: 1346917034.271743
Restore button key duration time: 0.78749
/tmp >: |
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发表于 2012-9-6 16:01:07
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