class_gamepad.cpp

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#include <atlasmv_base/class_gamepad.h>

class_gamepad::class_gamepad()
{
        ret=0;
        fd=0;
        n_buttons=0;
        n_axes=0;
}

class_gamepad::~class_gamepad()
{
        close(fd);
}

int class_gamepad::StartComm(const char*device)
{
        fd = open(device, O_RDONLY | O_NONBLOCK);
        if(fd<0)
        {
                sprintf(err,"Unable to open device: %s",device);
                return -3;
        }
        
        ret=ioctl(fd, JSIOCGAXES, &n_axes);
        if(ret<0)
        {
                strcpy(err,"Unable to read number of axes");
                return -3;
        }
        
        ret=ioctl(fd, JSIOCGBUTTONS, &n_buttons);
        if(ret<0)
        {
                strcpy(err,"Unable to read number of buttons");
                return -3;
        }
        
        ret=ioctl(fd, JSIOCGNAME(sizeof(name)), name);
        if(ret<0)
                strcpy(name,"Unknown");
        
        printf("\33[1m\33[36mGamepad\33[0m %s\n",name);
        
        buttons=(t_button*)malloc(n_buttons*sizeof(t_button));
        
        axes=(t_button*)malloc(n_axes*sizeof(t_button));
        
        for(int i=0;i<n_buttons;i++)
                buttons[i].callback=NULL;
        
        for(int i=0;i<n_axes;i++)
                axes[i].callback=NULL;
        
        return 0;
}

int class_gamepad::GetButtonMapping(void)
{
        ret=ioctl(fd,JSIOCGAXMAP,&m_axes);
        if(ret<0)
        {
                strcpy(err,"Unable to read axes mapping");
                return -3;
        }
        
        ret=ioctl(fd,JSIOCGBTNMAP,&m_buttons);
        if(ret<0)
        {
                strcpy(err,"Unable to read buttons mapping");
                return -3;
        }
        
        return 0;       
}

int class_gamepad::SetButtonMapping(void)
{
        ret=ioctl(fd,JSIOCSAXMAP,&m_axes);
        if(ret<0)
        {
                strcpy(err,"Unable to set axes mapping");
                return -3;
        }
        
        ret=ioctl(fd,JSIOCSBTNMAP,&m_buttons);
        if(ret<0)
        {
                strcpy(err,"Unable to set buttons mapping");
                return -3;
        }
        
        return 0;       
}

int class_gamepad::RegisterCallback(e_type type,int id,void (*callback)(int value,void*data),void*data)
{
        if(type==AXIS)
        {
                if(id>n_axes)
                {
                        sprintf(err,"This device does not have this axis: Axis %d",id);
                        return -2;
                }
                
                axes[id].callback=callback;
                axes[id].userdata=data;
                
        }else if(type==BUTTON)
        {
                if(id>n_buttons)
                {
                        sprintf(err,"This device does not have this Button: Button %d",id);
                        return -2;
                }
                
                buttons[id].callback=callback;
                buttons[id].userdata=data;
        }
        
        
        return 0;
}

int class_gamepad::Dispatch(bool debug)
{
        struct js_event buffer[64];
        
        ret = read (fd, buffer, sizeof(struct js_event)*64);
        if(ret<0)
                return 0;
        
        for(int i=0; i<ret/(signed int)sizeof(struct js_event);i++)
        {
                if(buffer[i].type & JS_EVENT_BUTTON & ~JS_EVENT_INIT)
                {
                        if(debug)printf("Button %d Value %d\n",buffer[i].number,buffer[i].value);
                        if(buttons[buffer[i].number].callback==NULL)
                                continue;
                        
                        buttons[buffer[i].number].value = buffer[i].value;
                        buttons[buffer[i].number].callback(buttons[buffer[i].number].value,buttons[buffer[i].number].userdata);
                }else if(buffer[i].type == JS_EVENT_AXIS)
                {
                        if(debug)printf("Axis %d Value %d\n",buffer[i].number,buffer[i].value);
                        if(axes[buffer[i].number].callback==NULL)
                                continue;
                        
                        axes[buffer[i].number].value = buffer[i].value;
                        axes[buffer[i].number].callback(axes[buffer[i].number].value,axes[buffer[i].number].userdata);
                }
        }
        
        return 0;
}

void class_gamepad::plerr(int ret)
{
        if(ret==-1)
        {
                printf("Error!!   ");
                printf("%s (raising SIGINT)\n",err);
                raise(SIGINT);
        }else if(ret==-2)
        {
                printf("Warning!! ");
                printf("%s\n",err);
        }else if(ret==-3)
        {
                printf("Error!!   ");
                printf("%s, ",err);fflush(stdout);
                perror(NULL);
                raise(SIGINT);
        }
}