Mango-AM335x 10.4인치 감압식 LCD display및 터치 보정하기

1. 소스 다운로드 및 컴파일

http://crztech.iptime.org:8080/Release/mango-am335x-ST/Linux/

에서 최종 릴리즈 소스를 다운로드 합니다.

$ wget http://crztech.iptime.org:8080/Release/mango-am335x-ST/Linux/kernel4.4/20200702/m3358_buildroot_k4419-20200702.tgz

이미지도 다운로드 한다.

$wget http://crztech.iptime.org:8080/Release/mango-am335x-ST/Linux/kernel4.4/20200702/m3358_buildroot_k4419-20200702-image.tgz

압축 풀기

$ tar xf m3358_buildroot_k4419-20200702.tgz

$ tar xf m3358_buildroot_k4419-20200702-image.tgz

$ mv m3358_buildroot_k4419-20200702-image m3358_buildroot_k4419-20200702/image

$ ./build_kernel defconfig m3358_audio_defconfig

$ ./build_kernel

2. LCD display Timming 변경

" arch/arm/boot/dts/am335x-evmsk.dts " 수정

#if 1 //crazyboys 20210706 10.4inch

display-timings {

800x600 {

hactive = <800>;

vactive = <600>;

hback-porch = <46>;

hfront-porch = <210>;

hsync-len = <1>;

vback-porch = <23>;

vfront-porch = <12>;

vsync-len = <1>;

clock-frequency = <40000000>;

hsync-active = <0>;

vsync-active = <0>;

};

#endif

3. 터치 드라이버 포팅

회로도에 아래와 같이 정의가 되어 있다.

코드가 아래와 같이 되어 있으므로

static int titsc_config_wires(struct titsc *ts_dev)

{

u32 analog_line[4];

u32 wire_order[4];

int i, bit_cfg;

for (i = 0; i < 4; i++) {

/*

* Get the order in which TSC wires are attached

* w.r.t. each of the analog input lines on the EVM.

*/

analog_line[i] = (ts_dev->config_inp[i] & 0xF0) >> 4;

wire_order[i] = ts_dev->config_inp[i] & 0x0F;

if (WARN_ON(analog_line[i] > 7))

return -EINVAL;

if (WARN_ON(wire_order[i] > ARRAY_SIZE(config_pins)))

return -EINVAL;

}

for (i = 0; i < 4; i++) {

int an_line;

int wi_order;

an_line = analog_line[i];

wi_order = wire_order[i];

bit_cfg = config_pins[wi_order];

if (bit_cfg == 0)

return -EINVAL;

switch (wi_order) {

case 0:

ts_dev->bit_xp = bit_cfg;

ts_dev->inp_xp = an_line;

break;

case 1:

ts_dev->bit_xn = bit_cfg;

ts_dev->inp_xn = an_line;

break;

case 2:

ts_dev->bit_yp = bit_cfg;

ts_dev->inp_yp = an_line;

break;

case 3:

ts_dev->bit_yn = bit_cfg;

ts_dev->inp_yn = an_line;

break;

}

return 0;

}

" arch/arm/boot/dts/am335x-evmsk.dts "

&tscadc {

status = "okay";

tsc {

ti,wires = <4>;

ti,x-plate-resistance = <200>;

ti,coordinate-readouts = <5>;

ti,wire-config = <0x01 0x10 0x23 0x32>;

ti,charge-delay = <0x400>;

};

CONFIG_TOUCHSCREEN_TI_AM335X_TSC=y

CONFIG_MFD_TI_AM335X_TSCADC=y

4. 커널 이미지 Write하기

커널 컴파일 시 image 디렉토리는 아래와 같이 존재를 해야 합니다.

$ ls

app buildroot-2013.11 image kernel mango_build_clean.sh uboot

$ ls image/

boot-images boot_tar_make.sh custom_datafs custom_datafs_make.sh rootfs.tar.gz

boot.tar.gz create-sdcard.sh custom_datafs.tar.gz rootfs.tar

Kernel 이미지는 custom_datafs/boot 디렉토리에 복사가 된다.

$ ./custom_datafs_make.sh

실행 후 custom_datafs.tar.gz 파일이 생성이 된다.

PC에 Micro SD를 삽입 후 Write를 한다. 디바이스 노드를 확인 한다.

$ sudo ./create-sdcard-ubuntu16.0.6.sh /dev/sdc

전체 이미지가 Write된다.

커널 이미지만 Write하기

$ cd image

$ mkdir fs

$ sudo mount /dev/sdc2 fs

$ sudo cp custom_datafs/boot/* fs/boot/

$ sudo umount fs

5. QT 어플 example 테스트

[root@localhost ~]# cat /proc/bus/input/devices

I: Bus=0000 Vendor=0000 Product=0000 Version=0000

N: Name="ti-tsc"

P: Phys=

S: Sysfs=/devices/platform/ocp/44e0d000.tscadc/TI-am335x-tsc/input/input0

U: Uniq=

H: Handlers=mouse0 event0

B: PROP=0

B: EV=b

B: KEY=400 0 0 0 0 0 0 0 0 0 0

B: ABS=1000003

export QWS_MOUSE_PROTO="tslib:/dev/input/event0"

export TSLIB_TSEVENTTYPE=INPUT

export TSLIB_TSDEVICE=/dev/input/event0

export TSLIB_CALIBFILE=/etc/pointercal

export TSLIB_CONFFILE=/etc/ts.conf

export TSLIB_PLUGINDIR=/usr/lib/ts

export LD_LIBRARY_PATH=/usr/lib:/lib

export QWS_SIZE=800*600

export QWS_DISPLAY=Transformed:Rot270:VNC:LinuxFb

6. 터치 및 display 테스트 방법

<터치 테스트>

# ts_calibrate

xres = 800, yres = 600

[ 43.868857] random: nonblocking pool is initialized

Took 62 samples...

Top left : X = 3815 Y = 3686

Took 66 samples...

Top right : X = 357 Y = 3657

Took 46 samples...

Bot right : X = 341 Y = 437

Took 61 samples...

Bot left : X = 3766 Y = 419

Took 60 samples...

Center : X = 2059 Y = 2062

816.349548 -0.203397 0.002043

615.823853 0.000250 -0.154147

Calibration constants: 53500284 -13329 133 40358632 16 -10102 65536

[root@localhost ~]# ts_test

[root@localhost ~]# fb-test

fb-test 1.0.0 (tablet_rosa)

fb res 800x600 virtual 800x600, line_len 3200

dim -1mm x -1mm

이미지를 삽입해서 fbv명령을 이용하여 이미지를 display 할 수 있다.

#fbv 1.jpg

사용법은 아래와 같습니다.

[root@localhost ~]# fbv

Usage: fbv [options] image1 image2 image3 ...

Available options:

--help | -h : Show this help

--alpha | -a : Use the alpha channel (if applicable)

--dontclear | -c : Do not clear the screen before and after displaying the image

--donthide | -u : Do not hide the cursor before and after displaying the image

--noinfo | -i : Supress image information

--stretch | -f : Strech (using a simple resizing routine) the image to fit onto screen if necessary

--colorstretch| -k : Strech (using a 'color average' resizing routine) the image to fit onto screen if necessary

--enlarge | -e : Enlarge the image to fit the whole screen if necessary

--ignore-aspect| -r : Ignore the image aspect while resizing

--delay <d> | -s <delay> : Slideshow, 'delay' is the slideshow delay in tenths of seconds.

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