【米尔瑞萨RZ/G2L开发板-试用体验】LCD触摸屏测试

我们连接RGB的LCD屏后，先进入终端把开机启动的mxapp2关闭。有两种方式，一是killall mxapp2，二是用top查到mxapp2的进程，然后用kill 进程ID

执行测试

1. root@myir-yg2lx:~# framebuffer_test
   
2. The framebuffer device was opened successfully.
   
3. vinfo.xres=800
   
4. vinfo.yres=480
   
5. vinfo.bits_per_bits=32
   
6. vinfo.xoffset=0
   
7. vinfo.yoffset=0
   
8. red.offset=16
   
9. green.offset=8
   
10. blue.offset=0
    
11. transp.offset=0
    
12. finfo.line_length=3200
    
13. finfo.type = PACKED_PIXELS
    
14. The framebuffer device was mapped to memory successfully.
    
15. color: red   rgb_val: 00FF0000
    
16. color: green   rgb_val: 0000FF00
    
17. color: blue   rgb_val: 000000FF
    
18. color: r & g   rgb_val: 00FFFF00
    
19. color: g & b   rgb_val: 0000FFFF
    
20. color: r & b   rgb_val: 00FF00FF
    
21. color: white   rgb_val: 00FFFFFF
    
22. color: black   rgb_val: 00000000

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注意 如果有上述输出，但是屏没有显示，是因为设备树没有更新，需要进入uboot执行：

1. => setenv fdt_file myb-rzg2l-disp.dtb
   
2. => saveenv

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触摸测试

需要连接带触摸的屏，我这里是MY-TFT070-K

终端执行行“evtest”进入测试界面

1. root@myir-yg2lx:~# evtest
   
2. No device specified, trying to scan all of /dev/input/event*
   
3. Available devices:
   
4. /dev/input/event0:      keyboard
   
5. /dev/input/event1:      generic ft5x06 (79)
   
6. /dev/input/event2:      A4TECH USB Device Keyboard
   
7. /dev/input/event3:      A4TECH USB Device System Control
   
8. /dev/input/event4:      A4TECH USB Device Consumer Control
   
9. /dev/input/event5:      A4TECH USB Device
   
10. /dev/input/event6:      A4TECH USB Device
    
11. Select the device event number [0-6]:

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从结果我看到，触摸屏ft5x06为event1。我们输入1

1. Select the device event number [0-6]: 1
   
2. Input driver version is 1.0.1
   
3. Input device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0
   
4. Input device name: "generic ft5x06 (79)"
   
5. Supported events:
   
6.   Event type 0 (EV_SYN)
   
7.   Event type 1 (EV_KEY)
   
8.     Event code 330 (BTN_TOUCH)
   
9.   Event type 3 (EV_ABS)
   
10.     Event code 0 (ABS_X)
    
11.       Value    155
    
12.       Min        0
    
13.       Max      799
    
14.     Event code 1 (ABS_Y)
    
15.       Value    476
    
16.       Min        0
    
17.       Max      479
    
18.     Event code 47 (ABS_MT_SLOT)
    
19.       Value      0
    
20.       Min        0
    
21.       Max        4
    
22.     Event code 53 (ABS_MT_POSITION_X)
    
23.       Value      0
    
24.       Min        0
    
25.       Max      799
    
26.     Event code 54 (ABS_MT_POSITION_Y)
    
27.       Value      0
    
28.       Min        0
    
29.       Max      479
    
30.     Event code 57 (ABS_MT_TRACKING_ID)
    
31.       Value      0
    
32.       Min        0
    
33.       Max    65535
    
34. Properties:
    
35.   Property type 1 (INPUT_PROP_DIRECT)
    
36. Testing ... (interrupt to exit)

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然后我们点击屏就有相应的输出：

1. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 57 (ABS_MT_TRACKING_ID), value 34
   
2. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 486
   
3. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 172
   
4. Event: time 3029532101.3029532101, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 1
   
5. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 0 (ABS_X), value 486
   
6. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 1 (ABS_Y), value 172
   
7. Event: time 3029532101.3029532101, -------------- SYN_REPORT ------------
   
8. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 485
   
9. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 171
   
10. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 0 (ABS_X), value 485
    
11. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 1 (ABS_Y), value 171
    
12. Event: time 3029532101.3029532101, -------------- SYN_REPORT ------------
    
13. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 484
    
14. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 0 (ABS_X), value 484
    
15. Event: time 3029532101.3029532101, -------------- SYN_REPORT ------------
    
16. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 485
    
17. Event: time 3029532101.30295322
    
18. Event: time 3029532101.3029532101, -------------- SYN_REPORT ------------
    
19. Event: time 3029532101.3029532101, type 3 (EV_ABS), code 57 (ABS_MT_TRACKING_ID), value -1
    
20. Event: time 3029532101.3029532101, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 0
    
21. Event: time 3029532101.3029532101, -------------- SYN_REPORT ------------

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由上面可知，主要显示坐标值、键值，具体信息如下：

EV_SYN：同步事件

EV_KEY：按键事件，如 BTN_TOUCH 表示是触摸按键

EV_ABS：绝对坐标，如触摸屏上报的坐标

BTN_TOUCH：触摸按键

ABS_MT_SLOT：事件中对应的 value

ABS_MT_TRACKING_ID 表示采集信息开始

单点触摸信息是以 ABS 承载并按一定顺序发送,如：

ABS_X：是相对于屏幕绝对坐标 X

ABS_Y:是相对于屏幕绝对坐标 Y

而多点触摸信息则是以 ABS_MT 承载并按一定顺序发送，如：

ABS_MT_POSITION_X：表示屏幕接触面的中心点 x 坐标位置.

ABS_MT_POSITION_Y：表示屏幕接触面的中心点 Y 坐标位置