2.8inch Arduino Display

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Product description

Support development boards such as ArduinoUNO and Mega2560 for use without wiring
320X240 HD resolution and support touch function
Supports 16-bit RGB 65K color display and rich color display
using 8-bit parallel bus, refresh faster than serial SPI
With SD card slot to facilitate the expansion of the experiment
Provide Arduino library, provide a wealth of sample programs
Military-grade process standards, long-term work stably
Provides underlying driver technology support
Data Acquisition: See Driver download

Product parameters

name	parameter
SKU	MAR2808
size	2.8(inch)
type	TFT
driver chip	ILI9341
resolution	320*240 (Pixel)
module interface	8-bit parallel interface
effective display area	57.6x43.2(mm)
module PCB size	78.22x52.7(mm)
operating temperature	-20℃~70℃
operating Voltage	5V
power consumption	about 90mw
product weight	25(g)

Interface definition

number	label	pin description
1	LCD_RST	LCD bus reset signal
2	LCD_CS	LCD bus chip select signal
3	LCD_RS	LCD bus command/data select signal
4	LCD_WR	LCD bus write signal
5	LCD_RD	LCD bus read signal
6	GND	power ground
7	5V	5V power input
8	3V3	NC this pin can not be connected
9	LCD_D0	LCD 8-bit data Bit0
10	LCD_D1	LCD 8-bit data Bit1
11	LCD_D2	LCD 8-bit data Bit2
12	LCD_D3	LCD 8-bit data Bit3
13	LCD_D4	LCD 8-bit data Bit4
14	LCD_D5	LCD 8-bit data Bit5
15	LCD_D6	LCD 8-bit data Bit6
16	LCD_D7	LCD 8-bit data Bit7
17	SD_SS	SD card SPI bus chip select signal
18	SD_DI	SD card SPI bus MOSI signal
19	SD_DO	SD card SPI bus MISO signal
20	SD_SCK	SD card SPI bus clock signal

Product size

Product size drawing：

Hardware description

Hardware schematic：Arduino 2.8 inch display module schematic.pdf

Using Instructions

Arduino platform using instructions

1.Wiring instructions

connect with UNO development board		Connect with Mega2560 Development Board
pins on the module	UNO microcontroller pin	pins on the module	Mega2560 microcontroller pin
LCD_RST	A4	LCD_RST	5V
LCD_CS	A3	LCD_CS	GND
LCD_RS	A2	LCD_RS	21
LCD_WR	A1	LCD_WR	20
LCD_RD	A0	LCD_RD	A0
GND	GND	GND	GND
5V	5V	5V	5V
LCD_D0	8	LCD_D0	8
LCD_D1	9	LCD_D1	9
LCD_D2	2	LCD_D2	2
LCD_D3	3	LCD_D3	3
LCD_D4	4	LCD_D4	4
LCD_D5	5	LCD_D5	5
LCD_D6	6	LCD_D6	6
LCD_D7	7	LCD_D7	7
SD_SS	10	SD_SS	10
SD_DI	11	SD_DI	11
SD_DO	12	SD_DO	12
SD_SCK	13	SD_SCK	13

2.operating instructions

Install the Arduino IDE software on your computer before doing the following

a.Connect the 2.8-inch display module to the Arduino development board according to the wiring instructions and power it on (note the development board model)

b.Download the 2.8 inch display module package from Driver download column

c.Extract the data package,open the install library folder,you can see the LCDWIKI_GUI,LCDWIKI_KBV and touch screen these three libraries,as shown below:

d.Copy the three libraries:LCDWIKI_GUI,LCDWIKI_KBV,and touch screen to the directory where the Arduino project files are located,

The default directory for Arduino project files is "C:\Users\Administrator\Documents\Arduino",You can define it yourself as follows:

Open Arduino IDE software,click File->Preferences to define the directory where Arduino project files are located,as shown in the following figure:

e.Open the Example folder in the package, you can see there are 11 test examples, as shown below:

f.Open any test example,eg open "Example_02_clear_screen"

g.After opening the "Example_02_clear_screen" test program,click the Tools button to select the board model and port number,as shown in the following figure:

If the development board model selection Mega, you also need to select the processor model, for the 2.8-inch display module,

we only select the ATmega2560 processor, as shown below:

h.Click the upload button to compile and download. When "Done Uploading" is displayed,the program has been successfully downloaded to the development board,

as shown in the following figure:

i.If the 2.8-inch display module is continuously displayed in black, white, red, green, and blue, the program runs successfully.

Matters needing attention

a.The display module uses 8-bit parallel port to transfer data,so the LCDWIKI library also needs to be set to 8-bit mode (since the LCDWIKI library supports

both 8-bit and 16-bit modes),the modification method is as follows:

Open the file LCDWKI_KBV\lcd_mode.h and set the CONFIG_USE_8BIT_BUS macro to 1, as shown below:

//if using 8bit mode,set the below macro definition to 1
//if using 16bit mode,set the below macro definition to 0
#define CONFIG_USE_8BIT_BUS 1

STM32 platform using instructions

1.Wiring instructions

pins on the module	STM32 corresponding wiring pin
LCD_RST	PC5
LCD_CS	PC9
LCD_RS	PC8
LCD_WR	PC7
LCD_RD	PC6
GND	GND
5V	5V
LCD_D0	PB8
LCD_D1	PB9
LCD_D2	PB10
LCD_D3	PB11
LCD_D4	PB12
LCD_D5	PB13
LCD_D6	PB14
LCD_D7	PB15
SD_SS	NC(No need to connect)
SD_DI	NC(No need to connect)
SD_DO	NC(No need to connect)
SD_SCK	NC(No need to connect)

2.operating instructions

Before you do the following, first install the keil software on your computer

a.Connect the 2.8-inch display module to the STM32 development board and power it up according to the wiring instructions

b.Download the 2.8 inch display module package from Driver download column

c.Unpack the package, open the "3-STM32测试程序\STM32_Demo_STM32F103RCT6_8BIT\STM32综合测试程序ILI9341_IO模拟\USER" folder,

find the "TOUCH.uvproj" file, double-click to open, as shown below:

d.After opening the project, first make JTAG settings, the setup steps are as follows (if the project has been set, you do not need to set it):

Connect JTAG to the computer and development board, click the magic wand icon -> Debug-> drop-down menu to select J-LINK/J-TRACE Cortex, as shown below:

Next click Settings, set ort to SW, Max to 2MHz, as shown below:

e.Set flash, the setup steps are as follows (if the project has been set, you do not need to set it):

First select the MCU model, click the magic wand icon -> Device -> select STM32F103RC MCU model, as shown below:

Then select the flash model, click Utilities->Settings->Add->Select STM32F10x High-density Flash->Add, as shown below:

f.Compile the project, click the compile button to compile the project. If the "FromELF: creating hex file..." prompt appears, the compilation is successful,

as shown in the following figure:

g.Download the program, click the download button, download the hex file to the development board, if the “Programming Done. Verify OK.” prompt appears,

the download is successful, as shown below:

h.If the module displays characters and graphics normally, the program runs successfully.

Matters needing attention

a.When downloading the program, if the following error occurs, the JTAG setting is incorrect. Please follow the instructions in step d to set it:

b.If the following error occurs, the flash setting is incorrect. Please follow the instructions in step e:

c.If the module does not display any after the program is successfully downloaded, you need to press the reset button to reset

Follow the steps below to run the program directly after downloading successfully (do not need to press the reset button)

Click the magic wand icon -> Utilities->Settings-> check Reset and run, as shown below: