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|
#include <fcntl.h>
#include <unistd.h>
#include <cstdlib>
#include <cstdio>
#include <string>
#include <sys/types.h>
#include <linux/input.h>
using std::string;
const unsigned char BUT1 = 0x01;
const unsigned char BUT2 = 0x04;
const unsigned char BUT3 = 0x02;
const unsigned char BUT4 = 0x40;
const unsigned char BUT5 = 0x80;
#define BITMASK( name, numbits ) \
unsigned short name[ ((numbits) - 1) / (sizeof( short ) * 8) + 1 ]; \
memset( name, 0, sizeof( name ) )
#define TEST_BIT( bitmask, bit ) \
( bitmask[ (bit) / sizeof(short) / 8 ] & (1u << ( (bit) % (sizeof(short) * 8))) )
int Open_cPad()
{
size_t MAX_DEVICES = 1;
int fd = -1;
input_id info;
for( size_t i = 0; i < MAX_DEVICES; ++i )
{
string devpath( "/dev/input/event0" );
//devpath << (int)i;
fd = open( devpath.c_str(), O_RDONLY, &info );
if( fd >= 0 )
{
int version = -1;
/* ioctl() accesses the underlying driver */
if (ioctl(fd, EVIOCGVERSION, &version)) {
perror("evdev ioctl");
}
/* the EVIOCGVERSION ioctl() returns an int */
/* so we unpack it and display it */
printf("evdev driver version is %d.%d.%d\n",
version >> 16, (version >> 8) & 0xff,
version & 0xff);
// Get Identifying info
if( ioctl( fd, EVIOCGID, &info) )
{
perror( "event device ioctl" );
return -1;
}
printf( "Bus: %#x, Vendor: %#x, Product: %#x, Version: %#x\n",
info.bustype, info.vendor, info.product, info.version );
switch ( info.bustype)
{
case BUS_PCI :
printf(" is on a PCI bus\n");
break;
case BUS_USB :
printf(" is on a Universal Serial Bus\n");
break;
/* ... */
}
// Get device 'name'
char name[256] = "Unknown";
if( ioctl( fd, EVIOCGNAME(sizeof name ), name) < 0 )
{
perror( "event device ioctl" );
}else
printf( "Device name '%s'\n", name );
if(ioctl(fd, EVIOCGPHYS(sizeof(name)), name) < 0) {
perror("event ioctl");
}else
printf("Device path '%s'\n", name );
if(ioctl(fd, EVIOCGUNIQ(sizeof(name)), name) < 0) {
perror("event ioctl");
}else
printf("Device identity '%s'\n", name );
// Get feature types
BITMASK( features, EV_MAX );
if( ioctl( fd, EVIOCGBIT( 0, EV_MAX ), features) < 0 )
{
perror( "event device ioctl" );
return -1;
}
printf( "Supported features:\n" );
for( size_t bit = 0; bit < EV_MAX; ++bit )
{
if( TEST_BIT( features, bit ) )
{
switch( bit )
{
case EV_SYN :
printf(" Sync. Events\n");
break;
//case EV_RST:
// printf( " Reset?\n" );
// break;
case EV_KEY:
printf( " Keys or buttons\n" );
break;
case EV_REL:
printf( " Relative axes\n" );
break;
case EV_ABS:
printf( " Absolute axes\n" );
break;
case EV_MSC:
printf( " Misc\n" );
break;
case EV_LED:
printf( " Led's\n" );
break;
case EV_SND:
printf( " Sounds\n" );
break;
case EV_REP:
printf( " Repeat\n" );
break;
case EV_FF : // fallthrough
case EV_FF_STATUS:
printf(" Force Feedback\n");
break;
case EV_PWR:
printf(" Power Management\n");
break;
default:
printf( " Unknown (bit %d)\n", bit );
}
}
}
// Check keystate
BITMASK( keys, KEY_MAX );
if( ioctl( fd, EVIOCGKEY( sizeof(keys) ), keys ) < 0 )
{
perror( "event device ioctl" );
return -1;
}
printf( "Key global status:\n" );
for( size_t bit = 0; bit < KEY_MAX; ++bit )
{
if( TEST_BIT( keys, bit ) )
{
printf( "Key (bit %d) active\n", bit );
}
}
}
else
printf( "Failed to open device\n" );
close( fd );
}
return fd;
}
int main( int argc, char **argv )
{
//printf(" Long: %d, int %d, short %d\n", sizeof( long ), sizeof( int ), sizeof( short ) );
//printf( "num chars %d\n", snprintf( NULL, 0, 0 ) );
//exit( 0 );
Open_cPad();
#if 1
int fd = open( "/dev/input/event0", O_RDONLY );
if( fd == -1 )
{
printf( "Failed to open device\n" );
goto hell;
}
struct input_event evbuf;
for(;;)
{
if( read( fd, &evbuf, sizeof evbuf ) == -1 )
{
printf( "Read error\n" );
goto hell;
}
printf( "Type: %d, Code: %d, Value: %d\n", evbuf.type, evbuf.code, evbuf.value );
}
#endif
#if 0
unsigned char buf[ 4 ];
for(;;)
{
if( read( fd, buf, sizeof buf ) == -1 )
{
printf( "Read error\n" );
goto hell;
}
printf( "Raw:\t%#x\t%#x\t%#x\t%#x\n", buf[ 0 ], buf[ 1 ], buf[ 2 ], buf[ 3 ] );
int dx = buf[ 1 ];
if( ( buf[ 0 ] & 0x10 ) != 0 )
dx -= 256;
int dy = - buf[ 2 ];
if( ( buf[ 0 ] & 0x20 ) != 0 )
dy += 256;
printf( "( %d, %d )\t", dx, dy );
if( buf[ 0 ] & BUT1 )
printf( "Left\t" );
if( buf[ 0 ] & BUT2 )
printf( "Middle\t" );
if( buf[ 0 ] & BUT3 )
printf( "Right\t" );
printf( "\n" );
}
#endif
//close( fd );
exit( EXIT_SUCCESS );
hell:
exit( EXIT_FAILURE );
}
|
