BuyDisplay 2.8" CTP Display Wiring Guide - ESP8266
Copyright 2018 Moddable Tech, Inc.
Revised: December 6, 2018
Specs
|
|
| Part |
ER-TFTM028-4 LCD w/Capacitive Touch Screen Module (datasheet) |
| Size |
2.8", 320 x 240 |
| Type |
TFT LCD |
| Interface |
SPI |
| Drivers |
video ILI9341, touch FT6206 |
| Availability |
2.8" BuyDisplay CTP display |
| Description |
This BuyDisplay screen is highly configurable and can be ordered with varying touch modules, main power voltage and connection types. This sample is for the 3.3v CTP version. |
Configuration
This display supports many configurations. For this sample, Moddable configured the display IMO settings to support 4 wire SPI. See the ER-TFTM028-4 datasheet. The jumper settings below are open or closed drag solder pads on the PCB.
| IMO Mode |
Jumper settings |
| 4-wire SPI Interface |
J2, J3, J4, J5 Short
J1, J6, J7, J8 Open
R1-R10=0R
R19=0R
R21-R28=0R
R17, R18, R20 not soldered |
Display input voltage
The TFTM028-4 can be configured to be powered by either 5v or 3.3v via a solder jumper. See Table 4.3 in the datasheet. For this guide the display was set to run with 3.3v input. If the display was configured for 5v Pin 2 on the display header would require 5v input.
Moddable Sample code
The drag example is good for testing this display. To run a debug build, use the following build command:
cd $MODDABLE/examples/piu/drag
mcconfig -d -m -p esp/buydisplay_ctp
ESP8266 Pinout
| BuyDisplay CTP Display |
ESP8266 |
ESP8266 Devboard label |
| 1 - VSS |
GND |
|
| 2 - VDD |
3.3V |
|
| 21 - Reset |
3.3V |
|
| 23 - CS |
GPIO 15 |
(D8) |
| 24 - SCK |
GPIO 14 |
(D5) |
| 25 - DC |
GPIO 2 |
(D4) |
| 27 - SDI |
GPIO 13 |
(D7) |
| 28 - SDO |
GPIO 12 |
(D6) |
| 30 - CPT SCL |
GPIO 4 |
(D2) |
| 31 - CPT SDA |
GPIO 5 |
(D1) |
