Copyright 2018 Moddable Tech, Inc.
Revised: December 6, 2018
| 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. |
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.
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
| 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) |
