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FAQ.md

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常见问题

中文 FAQ

Why does the screen display normally but capacitive touch cannot be used?
  1. Confirm whether the driver is installed correctly
  2. Confirm whether the correct configuration parameters are added to config.txt
  3. Enter i2cdetect -y -r 1 to check the touch device status
  4. If the following situation occurs, it means the touch driver is normal 
    pi@mainsailos:~ $ i2cdetect -y -r 1
    0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- -- 
10: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --
  5. If the following situation occurs, it means that the touch driver is not installed correctly. 
    pi@mainsailos:~ $ i2cdetect -y -r 1
    0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- 5d -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --
  6. When the above step 5 occurs (driver exception), you can try the following operations:
    1. Modify the dtoverlay=fly-tft-v2 added in config.txt to dtoverlay=fly-tft-v2-0x5d
    2. Restart the device
  7. If the above step 4 occurs (the driver is normal), you can try the following operations:
    1. Execute hexdump /dev/input/event0 command
    2. Touch the screen with your finger and observe the command line output
    3. If a large number of characters appear in the command line output, the driver is normal. Please check the touch configuration of your KlipperScreen.
    4. If there is no output in the command line, it means the driver is abnormal. Please contact us for resolution.
    5. CTRL + C Exit the command line