Waveshare 3.2 B touchscreen swapxy not working

[marksluser]

I am trying to swap the touchscreen x and y. In my config.txt file I try dtoverlay=waveshare32b:swapxy=1

however It does not work.

Looking at the Waveshare 3.2 B DTS file I see: swapxy = <&waveshare32b_ts>,"swap-xy?"; I believe it should be swapxy = <&waveshare32b_ts>,"ts,swap-xy?";

I tried to compile the dts file using the dtc compiler and received some warinings.

What settings did you use to compile the dts file to a dtb ?

Thank you,

-Mark

[swkim01]

Thank you. I fixed the bug.

[marksluser]

What was the command you used to compile the dts file?

I trieed to compile it using dtc -I dts -O dtb -o waveshare32b.dtbo waveshare32b.dts

[swkim01]

I used the following as to https://github.com/notro/fbtft/wiki/FBTFT-RPI-overlays. dtc -@ -I dts -O dtb -o waveshare32b-overlay.dts waveshare32b.dts

[DRAgon734465502]

The lastest raspbian OS have updated to 2017-03-02-raspbian-jessie

But the touch can not work well ，I use waveshare 3.5inch LCD with ads7846/xpt2046

The calibration file 99-calibration.conf can not work well, seem the file have stopped to work but it can work well at old version Raspbian

the Touch reverse, touch X axis but go to Y axis

please help me ， I am very urgent

[DRAgon734465502]

This driver can not run at 2017-03-02-raspbian-jessie， touch error

[sm3rt]

Hi any updates on this? The touch is still reversed. swap XY does work but then the Y is still reversed. Any ideas please?

[apteryks]

I confirm that even without rotating the waveshare35b-v2 screen, its touchscreen default configuration is off (x => y and y => -x). It's probably fixable via a the CalibrationMatrix libinput option via a Xorg config file (see: https://www.waveshare.com/wiki/3.5inch_DPI_LCD) but it'd be nicer if it worked correctly out of the box.

[apteryks]

I've finally understood what was causing my confusion. The screen is by default rotated 90 degrees in the counter-clockwise direction, but the touchscreen axes are untouched. So the X-Y axes need to be swapped (with swapxy=1) and the y axis needs to be inverted (no current way to do this in the dt overlay, but see: https://github.com/swkim01/waveshare-dtoverlays/pull/40).