Linux/AM3352: AM3352 touch is not working

Tool/software: Linux

Hi,

Processor SDK : ti-processor-sdk-linux-rt-am335x-evm-04.03.00.05

Display is using resistive touch panel , resolution is 480x272 , 4-wire

I use ts_calibrate for touch calibration , however touch still can't work.

following is my debug process...

Step 1:

I dump log from ti_am335x_tsc.c and get left upper corner position is (x,y) = (1142,1630)

right lower corner position is (x,y) = (2932,2430)

Step 2:

>hexdump /dev/input/event

left upper corner still get (1142,1630)

Step 3:

I use evtest to verify

following is the log:

Available devices:
/dev/input/event0:      ti-tsc
/dev/input/event1:      SIGMACHIP Usb Mouse
Select the device event number [0-1]: 0
Input driver version is 1.0.1
Input device ID: bus 0x0 vendor 0x0 product 0x0 version 0x0
Input device name: "ti-tsc"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 330 (BTN_TOUCH)
  Event type 3 (EV_ABS)
    Event code 0 (ABS_X)
      Value      0
      Min        0
      Max     4095
    Event code 1 (ABS_Y)
      Value      0
      Min        0
      Max     4095
    Event code 24 (ABS_PRESSURE)
      Value      0
      Min        0
      Max     4095
Properties:
Testing ... (interrupt to exit)   // I touch one point randomly 
Event: time 1540265814.525759, type 3 (EV_ABS), code 0 (ABS_X), value 2152
Event: time 1540265814.525759, type 3 (EV_ABS), code 1 (ABS_Y), value 1707
Event: time 1540265814.525759, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 159
Event: time 1540265814.525759, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 1
Event: time 1540265814.525759, -------------- SYN_REPORT ------------
Event: time 1540265814.538435, type 3 (EV_ABS), code 0 (ABS_X), value 1165
Event: time 1540265814.538435, type 3 (EV_ABS), code 1 (ABS_Y), value 1632
Event: time 1540265814.538435, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 278
Event: time 1540265814.538435, -------------- SYN_REPORT ------------
Event: time 1540265814.538476, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 0
Event: time 1540265814.538476, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 0
Event: time 1540265814.538476, -------------- SYN_REPORT ------------

Step 4:

I use ts_calibrate to try

ts_calibrate works good

ts_test works good

ts_print also works good

the x,y value are between (1~480,1~272)

However, my touch still can't work when Matrix is running.

Could someone advice me how to solve this problem.......

Thank you so much!

Best regards,

Helen

following is my setting:

---------------------

DTS:

&tscadc {
 status = "okay";
 tsc {
  ti,wires = <4>;
  ti,wires = <4>;
  ti,x-plate-resistance = <200>;
  ti,coordinate-readouts = <5>;
  ti,wire-config = <0x00 0x11 0x22 0x33>;
 };
 adc {
      ti,adc-channels = <4 5 6 7>;
      };

};

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