zynq_7010/zynq_7010_code/Keyboard.cpp

#include "Keyboard.h"
#include <stdio.h>
#include <sys/time.h>
#include "utilsfunc.h"
#define KEYCODE_POWER 116
#define KEYCODE_START 60
#define KEYCODE_STOP 115

namespace huagao
{

    Keyboard::Keyboard(std::function<void(const int)> buttonevent)
    {
        m_event = buttonevent;
        mInputFd = open("/dev/input/event0", O_RDONLY | O_NONBLOCK);
    }

    Keyboard::~Keyboard()
    {
        b_run = false;
        if (pollthread.joinable())
            pollthread.join();
        if (mInputFd > 0)
        {
            ::close(mInputFd);
        }
        ::close(mEpId);
    }

    void Keyboard::init()
    {
        mEpId = epoll_create(1);
        int err;
        int len;
        int i;
        unsigned char byte;
        int bit;
        struct input_id id;
        unsigned int evbit[2];
        std::string ev_name[] = {
            "EV_SYN",
            "EV_KEY",
            "EV_REL",
            "EV_ABS",
            "EV_MSC",
            "EV_SW",
            "NULL",
            "NULL",
            "NULL",
            "NULL",
            "NULL",
            "NULL",
            "NULL",
            "NULL",
            "NULL",
            "NULL",
            "NULL",
            "EV_LED",
            "EV_LND",
            "NULL",
            "EV_REP",
            "EV_FF",
            "EV_PWR",
        };
        if (mInputFd == -1)
        {
            LOG("open kd device or mouse fail! \n");
        }
        else
        {
            ev.data.fd = mInputFd;
            ev.events = EPOLLIN | EPOLLET;
            int ret = epoll_ctl(mEpId, EPOLL_CTL_ADD, mInputFd, &ev);
            if (ret == -1)
            {
                LOG("add kd device in epoll fail! \n");
            }
        }
        err = ioctl(mInputFd, EVIOCGID, &id);

        if (err == 0)
        {
            LOG("bustype = 0x%x\n", id.bustype);
            LOG("vendor = 0x%x\n", id.vendor);
            LOG("product = 0x%x\n", id.product);
            LOG("version = 0x%x\n", id.version);
        }

        len = ioctl(mInputFd, EVIOCGBIT(0, sizeof(evbit)), &evbit);
        if (len > 0 && len <= sizeof(evbit))
        {
            LOG("support ev type : ");
            for (i = 0; i < len; i++)
            {
                byte = ((unsigned char *)evbit)[i];
                for (bit = 0; bit < 8; bit++)
                {
                    if (byte & (1 << bit))
                        LOG("%s ", ev_name[i * 8 + bit].c_str());
                }
            }
            LOG("\n");
        }
        b_run = true;
        pollthread = std::thread(&Keyboard::poll, this);
    }

    void Keyboard::poll()
    {
        int re = 0;
        while (b_run)
        {
            re = epoll_wait(mEpId, events, MAX_EVENTS, 1000);
            for (int i = 0; i < re; ++i)
            {
                if (events[i].events & EPOLLIN)
                {
                    LOG("poll\n");
                    doInput(events + i);
                }
            }
            re = 0;
        }
    }

    long time_pressed_sec;
    long time_pressed_usec;

    void Keyboard::doInput(const epoll_event *ev)
    {
        ssize_t resize = 0;
        ssize_t n = 0;
        struct input_event input_ev;
        while ((resize = read(ev->data.fd, buffer + n, sizeof(struct input_event) - n)) > 0)
        {
            n += resize;
            if (n == sizeof(input_event))
            {
                memcpy((void *)(&input_ev), buffer, sizeof(input_event));
                if (input_ev.type != 1)  // 非按键不响应
                {
                    n = 0;
                    continue;
                }

                LOG("keyboard type=%d; code=%d; value=%d, sec=%ld, usec=%ld\n", (int)input_ev.type,
                    (int)input_ev.code, (int)input_ev.value, input_ev.time.tv_sec, input_ev.time.tv_usec);

                if (input_ev.value == 0 &&  input_ev.type == 1)  //记录按下的时间状态
                {
                    time_pressed_sec = (long)input_ev.time.tv_sec;
                    time_pressed_usec = (long)input_ev.time.tv_usec;
                    n = 0;
                    continue;
                }
                LOG("keyboard press tiem sec=%ld, usec=%ld\n", time_pressed_sec, time_pressed_usec);
                double delay = (input_ev.time.tv_usec - time_pressed_usec) / 1000;
                delay = delay + (input_ev.time.tv_sec - time_pressed_sec) * 1000;
                LOG("press delay:%lf\n", delay);
                switch (input_ev.code)
                {
                case KEYCODE_POWER:


                    if (delay >= 3000 && delay <= 200000)
                    {
                        printf("设备关机中。。。\r\n");
                        system("poweroff");   
                    }
                    else  if (get_devs_status(SLEEP_STATUS_PATH) == SCANNER_ERR_SLEEP)
                    {
                         m_event(3);
                         printf("按键唤醒设备中。。。\r\n");
                    }
                    break;
                case KEYCODE_START:
                    printf("KEYCODE_START\r\n");
                    m_event(0);
                    break;
                case KEYCODE_STOP:
                    printf("按键停止扫描!!!\n");
                    m_event(1);
                    break;
                default:
                    break;
                }
                n = 0;
            }
        }
    }

} // namespace huagao