Difference between revisions of "KOE LVDS Capacitive Display Set"
| Line 8: | Line 8: | ||
== Mechanical connection == | == Mechanical connection == | ||
| − | When combined with the complete | + | When combined with the complete iMX8M Industrial Kit, the Display Set creates a compact, ready-to-use solution. To assemble them together, the following mechanical and electrical accessories were designed and selected to be part of the Display set: |
| − | * TFT | + | * TFT LCD 1920 x 1080 Pixels display (TX18D200VM0EAA) with LVDS interface and Capacitive Touch with SIS9509 controller |
| − | * | + | * 4x Hex Standoff Threaded M3 35.00mm long [Manufacturer PN: 971350321] |
| − | * | + | * custom 20-pins LVDS cable, 180mm long. The cable is supply with LCD as set |
| − | + | * custom 2-pins cable for LCD back light, 150mm long. The cable is supply with LCD as set | |
| − | * | + | * necessary spacers |
| − | * necessary | + | [[image:iMX8M Industrial Dev Kit KOE LCD Side view.jpg|800px]] |
| − | |||
| − | [[image: | ||
== Hardware connection == | == Hardware connection == | ||
Revision as of 21:40, 10 July 2022
This section shows information about the KOE LVDS Capacitive Display Set. The iMX8M Industrial Development Kit in this configuration is equipped with Yocto dunfell, kernel 5.4 to support LVDS display with a touchscreen layer. In this case the display is installed on the top of the iMX8M Development Baseboard.
Mechanical connection
When combined with the complete iMX8M Industrial Kit, the Display Set creates a compact, ready-to-use solution. To assemble them together, the following mechanical and electrical accessories were designed and selected to be part of the Display set:
- TFT LCD 1920 x 1080 Pixels display (TX18D200VM0EAA) with LVDS interface and Capacitive Touch with SIS9509 controller
- 4x Hex Standoff Threaded M3 35.00mm long [Manufacturer PN: 971350321]
- custom 20-pins LVDS cable, 180mm long. The cable is supply with LCD as set
- custom 2-pins cable for LCD back light, 150mm long. The cable is supply with LCD as set
- necessary spacers
Hardware connection
To enable smooth communication between the board and the display, iMX6 Rex Adapter was designed to connect the set together. To implement the display capabilities, following connections need to be made:
- connection between LVDS Display and LVDS Adapter J1 (using a flexible flat cable)
- LVDS Interface and power connection between iMX6 Rex Development Kit J41 and LVDS Adapter J2 (using LVDS and Touchscreen cable)
- touchscreen connection between iMX6 Rex Development Kit J40 and LVDS Adapter J3 (using LVDS and Touchscreen cable)
LVDS and Touchscreen cable
Software instructions
iMX6 Rex Display Set is preinstalled with Android operation system enabling LVDS and touchscreen capabilities by default. Manual configuration is not necessary, but might be useful in individual cases.
LVDS manual booting
Manually booting with LVDS interface as a primary source for video output:
Rex U-Boot > setenv video 'video=mxcfb0:dev=ldb,edt570,if=RGB666 video=mxcfb1:off' Rex U-Boot > boot
Touchscreen test
Make sure TSC2007 chip is detected and bound as input device:
root@imx6-rexultra:~# dmesg | grep -i tsc2007 input: TSC2007 Touchscreen as /devices/soc0/soc.0/2100000.aips-bus/21a4000.i2c/i2c-1/1-0048/input/input0 evbug: Connected device: input0 (TSC2007 Touchscreen at 1-0048/input0)
Touchscreen events are generated after pressing the resistive layer:
root@imx6-rexultra:~# evtest /dev/input/by-path/platform-21a4000.i2c-event
Input driver version is 1.0.1
Input device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0
Input device name: "TSC2007 Touchscreen"
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 3529
Min 0
Max 4095
Event code 1 (ABS_Y)
Value 375
Min 0
Max 4095
Event code 24 (ABS_PRESSURE)
Value 0
Min 0
Max 4095
Properties:
Testing ... (interrupt to exit)
Event: time 1457899907.959665, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 1
Event: time 1457899907.959665, type 3 (EV_ABS), code 0 (ABS_X), value 1657
Event: time 1457899907.959665, type 3 (EV_ABS), code 1 (ABS_Y), value 2486
Event: time 1457899907.959665, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 3268
Event: time 1457899907.959665, -------------- EV_SYN ------------
Event: time 1457899907.969094, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 0
Event: time 1457899907.969094, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 0
Event: time 1457899907.969094, -------------- EV_SYN ------------