Search
Filters
Close

HDMI Interface TFTs for Raspberry Systems. Connection Guide for Plug and Play Devices...

Tuesday, July 12, 2022

2022/1/11

HDMI Series is plug and play device. There are two IC transfers display and touch signal to master device. For touch panel, there are Mouse Mode (default) and Touch Pad Mode. And capacitive touch panel can update the firmware through USB port. It can work with Windows and Raspbian operating system.

1 Connect HDMI port

   1.1 Connect HDMI port

   1.2 Connect USB port The power of 5” module is support by USB port. Please make sure, the power is enough for module. For 7” and 10.1”, it is not necessary connected when module without touch panel

   1.3 Power ON If “power on” before connecting HDMI, there are dummy data on screen. In the same way, it should be power off when HDMI data stop

   1.4 Resolution and display character setting

 

2 Backlight

  2.1 WF70A8 

 

3 With Raspberry PI and Raspbian Backlight

  3.1 Hardware

There are 2 parts must connect to Raspberry Pi: HDMI port and USB port (if there is touch function or it is 5” module). The GPIO socket on the top is just for fixing Raspberry Pi and transfers Raspberry Pi’s PIN to the right side. Therefore, Raspberry Pi’s I/O can be used normally to control other devices or application.

After combine Raspberry Pi with module. There are optional accessories including HDMI connector, USB cable and spacer support. With then, you can use Raspberry PI more easily. ( 6.2 Optional accessories)

 

 

  3.2 Display Character Setting in Raspbian 

Raspbian is Raspberry Pi official OS. Use it with module, you should add or change setting in config.txt file of the SD card. The setting value as blow: 

4 Rotate screen in Raspbain

   4.1 Rotate the Display

Depend different rotation degree, add the instruction to the config.txt file in SD card. , After reboot Raspberry Pi, the screen has been rotated. (Note: not for touch panel yet.) 

Rotation degree

Instruction

display_rotate=0

90°

display_rotate=1

180°

display_rotate=2

270°

display_rotate=3

 Table1: Display rotate instruction

   4.2 Mouse mode rotate setting 

   4.3 Pad mode rotate setting

 

5 Touch Panel

   5.1.1 Operator System Support 

Hardware PC Raspberry Pi Other
OS Win 7 Win 10 Raspbian Ubuntu 18.04/20.10 Win 10 IOT Android
RTP O O O O O X
CTP O O O O O Coming soon

*With other OS, please contact us for more information.

 

    5.1.2 Resistive Touch Panel

It is recommended to calibrate every year.

With Windows OS, please download the Calibration tool from https://touch-base.com/oem/microchip/

With Raspbian OS, plese fallow the steps below: 

- Before starting, make sure you are on-line

- Requires:

#sudo apt-get update

#sudo apt-get install git-core

#sudo apt-get install git make g++ libusb-1.0-0-dev libgtk2.0-dev

#cd ~

#git clone https://github.com/tom-2015/rpi-AR1100.git

#cd rpi-AR1100

#make

#sudo chmod +x AR1100

sudo ./AR1100-c9-m

You can calibrate with 4 or 25 points, 9 is the default. And it is only support mouse mode. 

 

   5.1.3 Capacitive Touch Panel 

The default mode is Mouse Mode (single touch). If you want Pad Mode (2 finger), there are firmware change tool on WINSTAR distributor download page.  

 

 6 Connector information 

   6.1 Connector on PCB 

 

    6.2 Optional accessories 

 

 7 Recommended fixing method 

  8 Q&A

Why is touch panel not working? 

1) Please check if touch panel shows on the “Device Manager”. 

> Yes, try to remove device of touch panel. Select the correct device from the device information. It will be similar with the picture below. Then re-plug and waiting re-install driver automatic by system. 

> No, try plug USB cable again. Make sure the cable is good connected. 

2) What kind of OS? (see 5.1.1.)

 

Touch point isn’t on the right place. 

(1) RTP: Please do calibration (See 5.1.2 Resistive Touch Panel)

(2) CTP: Check if setting of screen resolution is correct. And the desktop is full screen. 

 

 The screen doesn’t show anything.

(1) Check HDMI cable is good connected. 

(2) Make sure the power current is enough. The backlight should be turn on. 

(3) It need to setting display information with some OS. There is an example for Raspberry Pi(See 3.2)

 

There is something wrong with screen. The picture doesn’t in the right place or there are some strange lines on the side.

(1) Check the resolution and display setting.

 

Why there is dummy signal in the beginning before image data?

(1) See 1.3

 

I need right button function of mouse

(1) Please change the TP firmware to touch panel Mode (See 5)

;