GT9XX触摸屏双击唤醒功能分析

来源：互联网发布：octane render mac 编辑：程序博客网时间：2024/05/21 15:38

一、触摸屏唤醒方式

1.在屏幕上画其中26个字母中的一个来唤醒屏幕：例如：a/b/c/d….
2. 在屏幕上画线唤醒屏幕：”上/下/左/右”
3.双击屏幕唤醒：在屏幕上双击两下。

二、触摸屏唤醒的原理

其实唤醒屏幕的原理很简单，就是检测触摸屏上面的动作，如果该动作是唤醒手势，则触发电源开关键来唤醒屏幕，调用的方法是input_report_key(ts->input_dev, KEY_POWER, 1); input_sync(ts->input_dev); input_report_key(ts->input_dev, KEY_POWER, 0); input_sync(ts->input_dev);
这里写图片描述

三、GT9XX触摸屏的唤醒代码

static void goodix_ts_work_func(struct work_struct *work){    u8  end_cmd[3] = {GTP_READ_COOR_ADDR >> 8, GTP_READ_COOR_ADDR & 0xFF, 0};    u8  point_data[2 + 1 + 8 * GTP_MAX_TOUCH + 1]={GTP_READ_COOR_ADDR >> 8, GTP_READ_COOR_ADDR & 0xFF};    u8  touch_num = 0;    u8  finger = 0;    static u16 pre_touch = 0;    static u8 pre_key = 0;#if GTP_WITH_PEN    u8 pen_active = 0;    static u8 pre_pen = 0;#endif    u8  key_value = 0;    u8* coor_data = NULL;    s32 input_x = 0;    s32 input_y = 0;    s32 input_w = 0;    s32 id = 0;    s32 i  = 0;    s32 ret = -1;    struct goodix_ts_data *ts = NULL;#if GTP_COMPATIBLE_MODE    u8 rqst_buf[3] = {0x80, 0x43};  // for GT9XXF#endif#if GTP_GESTURE_WAKEUP    u8 doze_buf[3] = {0x81, 0x4B};#endif    GTP_DEBUG_FUNC();    ts = container_of(work, struct goodix_ts_data, work);    if (ts->enter_update)    {        return;    }#if GTP_GESTURE_WAKEUP    if (DOZE_ENABLED == doze_status)    {                       ret = gtp_i2c_read(i2c_connect_client, doze_buf, 3);        GTP_DEBUG("0x814B = 0x%02X", doze_buf[2]);        if (ret > 0)        {                 /***************  画字母唤醒  **********************/            if ((doze_buf[2] == 'a') || (doze_buf[2] == 'b') || (doze_buf[2] == 'c') ||                (doze_buf[2] == 'd') || (doze_buf[2] == 'e') || (doze_buf[2] == 'g') ||                 (doze_buf[2] == 'h') || (doze_buf[2] == 'm') || (doze_buf[2] == 'o') ||                (doze_buf[2] == 'q') || (doze_buf[2] == 's') || (doze_buf[2] == 'v') ||                 (doze_buf[2] == 'w') || (doze_buf[2] == 'y') || (doze_buf[2] == 'z') ||                (doze_buf[2] == 0x5E) /* ^ */                )            {                if (doze_buf[2] != 0x5E)                {                    GTP_INFO("Wakeup by gesture(%c), light up the screen!", doze_buf[2]);                }                else                {                    GTP_INFO("Wakeup by gesture(^), light up the screen!");                }                doze_status = DOZE_WAKEUP;                input_report_key(ts->input_dev, KEY_POWER, 1);                input_sync(ts->input_dev);                input_report_key(ts->input_dev, KEY_POWER, 0);                input_sync(ts->input_dev);                // clear 0x814B                doze_buf[2] = 0x00;                gtp_i2c_write(i2c_connect_client, doze_buf, 3);            }             /***************  画直线唤醒  **********************/               else if ( (doze_buf[2] == 0xAA) || (doze_buf[2] == 0xBB) ||                (doze_buf[2] == 0xAB) || (doze_buf[2] == 0xBA) )            {                char *direction[4] = {"Right", "Down", "Up", "Left"};                u8 type = ((doze_buf[2] & 0x0F) - 0x0A) + (((doze_buf[2] >> 4) & 0x0F) - 0x0A) * 2;                GTP_INFO("%s slide to light up the screen!", direction[type]);                doze_status = DOZE_WAKEUP;                input_report_key(ts->input_dev, KEY_POWER, 1);                input_sync(ts->input_dev);                input_report_key(ts->input_dev, KEY_POWER, 0);                input_sync(ts->input_dev);                // clear 0x814B                doze_buf[2] = 0x00;                gtp_i2c_write(i2c_connect_client, doze_buf, 3);            }            /***************  双击屏幕唤醒  **********************/            else if (0xCC == doze_buf[2])            {                GTP_INFO("Double click to light up the screen!");                doze_status = DOZE_WAKEUP;                /////////////  模拟按下电源键唤醒  ///////////////////                input_report_key(ts->input_dev, KEY_POWER, 1);                input_sync(ts->input_dev);                input_report_key(ts->input_dev, KEY_POWER, 0);                input_sync(ts->input_dev);                // clear 0x814B                doze_buf[2] = 0x00;                gtp_i2c_write(i2c_connect_client, doze_buf, 3);            }            else            {                // clear 0x814B                doze_buf[2] = 0x00;                gtp_i2c_write(i2c_connect_client, doze_buf, 3);                gtp_enter_doze(ts);            }        }        if (ts->use_irq)        {            gtp_irq_enable(ts);        }        return;    }#endif    ret = gtp_i2c_read(ts->client, point_data, 12);    if (ret < 0)    {        GTP_ERROR("I2C transfer error. errno:%d\n ", ret);        if (ts->use_irq)        {            gtp_irq_enable(ts);        }        return;    }    finger = point_data[GTP_ADDR_LENGTH];}

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