/*
* jstest.c Version 1.2
*
* Copyright (c) 1996-1999 Vojtech Pavlik
*
* Sponsored by SuSE
*/
/*
* This program can be used to test all the features of the Linux
* joystick API, including non-blocking and select() access, as
* well as version 0.x compatibility mode. It is also intended to
* serve as an example implementation for those who wish to learn
* how to write their own joystick using applications.
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Should you need to contact me, the author, you can do so either by
* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
*/
#include <fcntl.h>
#include <linux/input.h>
#include <linux/joystick.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <cerrno>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
char *axis_names[ABS_MAX + 1] = {
"X", "Y", "Z", "Rx", "Ry", "Rz", "Throttle", "Rudder",
"Wheel", "Gas", "Brake", "?", "?", "?", "?", "?",
"Hat0X", "Hat0Y", "Hat1X", "Hat1Y", "Hat2X", "Hat2Y", "Hat3X", "Hat3Y",
"?", "?", "?", "?", "?", "?", "?",
};
char *button_names[KEY_MAX - BTN_MISC + 1] = {
"Btn0", "Btn1", "Btn2", "Btn3", "Btn4",
"Btn5", "Btn6", "Btn7", "Btn8", "Btn9",
"?", "?", "?", "?", "?",
"?", "LeftBtn", "RightBtn", "MiddleBtn", "SideBtn",
"ExtraBtn", "ForwardBtn", "BackBtn", "TaskBtn", "?",
"?", "?", "?", "?", "?",
"?", "?", "Trigger", "ThumbBtn", "ThumbBtn2",
"TopBtn", "TopBtn2", "PinkieBtn", "BaseBtn", "BaseBtn2",
"BaseBtn3", "BaseBtn4", "BaseBtn5", "BaseBtn6", "BtnDead",
"BtnA", "BtnB", "BtnC", "BtnX", "BtnY",
"BtnZ", "BtnTL", "BtnTR", "BtnTL2", "BtnTR2",
"BtnSelect", "BtnStart", "BtnMode", "BtnThumbL", "BtnThumbR",
"?", "?", "?", "?", "?",
"?", "?", "?", "?", "?",
"?", "?", "?", "?", "?",
"?", "?", "WheelBtn", "Gear up",
};
#define NAME_LENGTH 128
int main(int argc, char **argv) {
int fd, i;
unsigned char axes = 2;
unsigned char buttons = 2;
int version = 0x000800;
char name[NAME_LENGTH] = "Unknown";
uint16_t btnmap[KEY_MAX - BTN_MISC + 1];
uint8_t axmap[ABS_MAX + 1];
if (argc < 2 || argc > 3 || !strcmp("--help", argv[1])) {
puts("");
puts("Usage: jstest [<mode>] <device>");
puts("");
puts("Modes:");
puts(" --normal One-line mode showing immediate status");
puts(" --old Same as --normal, using 0.x interface");
puts(" --event Prints events as they come in");
puts(" --nonblock Same as --event, in nonblocking mode");
puts(" --select Same as --event, using select() call");
puts("");
return 1;
}
if ((fd = open(argv[argc - 1], O_RDONLY)) < 0) {
perror("jstest");
return 1;
}
ioctl(fd, JSIOCGVERSION, &version);
ioctl(fd, JSIOCGAXES, &axes);
ioctl(fd, JSIOCGBUTTONS, &buttons);
ioctl(fd, JSIOCGNAME(NAME_LENGTH), name);
ioctl(fd, JSIOCGAXMAP, axmap);
ioctl(fd, JSIOCGBTNMAP, btnmap);
printf("Driver version is %d.%d.%d.\n", version >> 16, (version >> 8) & 0xff,
version & 0xff);
if (buttons > 0 && btnmap[0] < BTN_MISC) {
/* btnmap out of range for names. Don't print any. */
printf("Joystick (%s) has %d axes ", name, axes);
printf("and %d buttons.\n", buttons);
} else {
printf("Joystick (%s) has %d axes (", name, axes);
for (i = 0; i < axes; i++)
printf("%s%s", i > 0 ? ", " : "", axis_names[axmap[i]]);
puts(")");
printf("and %d buttons (", buttons);
for (i = 0; i < buttons; i++)
printf("%s%s", i > 0 ? ", " : "", button_names[btnmap[i] - BTN_MISC]);
puts(").");
}
printf("Testing ... (interrupt to exit)\n");
/*
* Old (0.x) interface.
*/
if ((argc == 2 && version < 0x010000) || !strcmp("--old", argv[1])) {
struct JS_DATA_TYPE js;
while (1) {
if (read(fd, &js, JS_RETURN) != JS_RETURN) {
perror("\njstest: error reading");
return 1;
}
printf("Axes: X:%3d Y:%3d Buttons: A:%s B:%s\r", js.x, js.y,
(js.buttons & 1) ? "on " : "off",
(js.buttons & 2) ? "on " : "off");
fflush(stdout);
usleep(10000);
}
}
/*
* Event interface, single line readout.
*/
if (argc == 2 || !strcmp("--normal", argv[1])) {
int *axis;
char *button;
int i;
struct js_event js;
axis = calloc(axes, sizeof(int));
button = calloc(buttons, sizeof(char));
while (1) {
if (read(fd, &js, sizeof(struct js_event)) != sizeof(struct js_event)) {
perror("\njstest: error reading");
return 1;
}
switch (js.type & ~JS_EVENT_INIT) {
case JS_EVENT_BUTTON:
button[js.number] = js.value;
break;
case JS_EVENT_AXIS:
axis[js.number] = js.value;
break;
}
printf("\r");
if (axes) {
printf("Axes: ");
for (i = 0; i < axes; i++) printf("%2d:%6d ", i, axis[i]);
}
if (buttons) {
printf("Buttons: ");
for (i = 0; i < buttons; i++)
printf("%2d:%s ", i, button[i] ? "on " : "off");
}
fflush(stdout);
}
}
/*
* Event interface, events being printed.
*/
if (!strcmp("--event", argv[1])) {
struct js_event js;
while (1) {
if (read(fd, &js, sizeof(struct js_event)) != sizeof(struct js_event)) {
perror("\njstest: error reading");
return 1;
}
printf("Event: type %d, time %d, number %d, value %d\n", js.type, js.time,
js.number, js.value);
fflush(stdout);
}
}
/*
* Reading in nonblocking mode.
*/
if (!strcmp("--nonblock", argv[1])) {
struct js_event js;
fcntl(fd, F_SETFL, O_NONBLOCK);
while (1) {
while (read(fd, &js, sizeof(struct js_event)) ==
sizeof(struct js_event)) {
printf("Event: type %d, time %d, number %d, value %d\n", js.type,
js.time, js.number, js.value);
}
if (errno != EAGAIN) {
perror("\njstest: error reading");
return 1;
}
usleep(10000);
}
}
/*
* Using select() on joystick fd.
*/
if (!strcmp("--select", argv[1])) {
struct js_event js;
struct timeval tv;
fd_set set;
tv.tv_sec = 1;
tv.tv_usec = 0;
while (1) {
FD_ZERO(&set);
FD_SET(fd, &set);
if (select(fd + 1, &set, NULL, NULL, &tv)) {
if (read(fd, &js, sizeof(struct js_event)) != sizeof(struct js_event)) {
perror("\njstest: error reading");
return 1;
}
printf("Event: type %d, time %d, number %d, value %d\n", js.type,
js.time, js.number, js.value);
}
}
}
printf("jstest: unknown mode: %s\n", argv[1]);
return -1;
}