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4.3inch Capacitive Touch LCD User Manual
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4.3inch Capacitive Touch LCD
User Manual
OVERVIEW
This is a multicolor graphic LCD display, 4.3inch diagonal, 800x480 pixels.
It is able to display 16,777,216 colors via the 24-bit RGB interface, supports up to 5-points capacitive
touch control via I2C interface.
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4.3inch Capacitive Touch LCD User Manual
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CONTENT
Overview .............................................................................................................................................. 1
Specificiations ....................................................................................................................................... 3
Interface ............................................................................................................................................... 3
Demo codes .......................................................................................................................................... 4
Download Demo codes. ................................................................................................................ 4
STM32F7 examples ....................................................................................................................... 4
Hardware connection ............................................................................................................ 4
Expected result ..................................................................................................................... 6
STM32F4 examples ....................................................................................................................... 6
Hardware connection ............................................................................................................ 6
Expected result ..................................................................................................................... 8
FAQ ...................................................................................................................................................... 9
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4.3inch Capacitive Touch LCD User Manual
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SPECIFICIATIONS
Working voltage：
3.3V/5V
LCD Interface：
24-bit RGB
Logic Level：
3.3V
LCD Type：
TFT
Display Colors：
16,777,216
Resolution ：
800(H)RGB x 480(V)
Display Size：
95.04 (H) x 53.856 (V)mm
Dot Pitch：
0.1188(H) x 0.1122(V) mm
Touch controller：
GT911
Touch Interface：
I2C
Dimension：
106 x 68(mm)
INTERFACE
PIN
Description
5V
Power supply
IRQ
Interrupt (Touch)
SDA
I2C data pin (Touch)
NC
No connected
RST
Reset
SCL
I2C clock pin (Touch)
PWM
Backlight brightness adjustment
R0-R7
Data lines (Red)
G0-G7
Data lines (Green)
B0-B7
Data lines (Blue)
DISP
Brightness control enable (High active)
CLK
LCD clock
VSYNC
Horizontal synchronization
HSYNC
Vertical synchronization
DE
Control mode selection
GND
Ground
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4.3inch Capacitive Touch LCD User Manual
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DEMO CODES
DOWNLOAD DEMO CODES.
Download demo codes from Waveshare wiki.
https://www.waveshare.com/wiki/4.3inch_Capacitive_Touch_LCD#Introduction
Unzip it:
STM32F429: Examples based on Open429I-C, whose chip is STM32F429IGT6. The project uses HAL
libraries
STM32F746:Examples based on Open746I-C, whose chip is STM32746IGT6. The project uses HAL
libraries. With Open746I-C, both RGB Header interface and RGB Cable interface are compatible, so we
provide two examples for both interfaces.
Clean.bat: Batch files sued to clean redundant files generated when compiling.
STM32F7 EXAMPLES
Development board used is Waveshare Open746I-C, chip is STM32F746IGT6. The project uses HAL
libraries.
HARDWARE CONNECTION
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4.3inch Capacitive Touch LCD User Manual
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For this board, we provide two examples, with same functions. The only difference of them is that the
touch interface
RGB Header interface (Interface 1)
STM32
4.3INCH CAPACITIVE TOUCH LCD
5V
5V
IRQ
PD7
SDA
PF8
RST
PF6
SCL
PF7
PWM
PA3
R0
PH2
R1
PH3
R2
PH8
R3
PH9
R4
PH10
R5
PC0
R6
PB1
R7
PG6
G0
PE5
G1
PE6
G2
PH13
G3
PG10
G4
PH15
G5
PI0
G6
PI1
G7
PI2
B0
PE4
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4.3inch Capacitive Touch LCD User Manual
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B1
PG12
B2
PD6
B3
PG11
B4
PI4
B5
PI5
B6
PI6
B7
PI7
DISP
No Connect (Or set it to High)
CLK
PG7
VSYNC
PI9
HSYNC
PI10
DE
PF10
GND
GND
RGB Cable interface (Interface 2), the only difference between Interface 1 is touch pins.
STM32
4.3inch Capacitive Touch LCD
SDA
PD13
RST
PD11
SCL
PD12
EXPECTED RESULT
1. Display a picture
2. Display English and Chinese characters
3. Draw point, line, rectangle and circle.
4. Display the points where finger touch, supports up to 5-points touch
STM32F4 EXAMPLES
Development board used is Waveshare Open429I-C, chip is STM32F429IGT6. The project uses HAL
libraries.
HARDWARE CONNECTION
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4.3inch Capacitive Touch LCD User Manual
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The RGB Cable interface (Interface 2) is used for resistive touch screen, isn’t compatible with
capacitive screen, therefore, we only provide RGB Header example (Interface 1) for this board.
RGB Header Interface (interface 1)
STM32
4.3inch Capacitive Touch LCD
5V
5V
IRQ
PE3
SDA
Pb14
RST
Pd5
SCL
Pb13
PWM
PD4
R0
pH2
R1
PH3
R2
pH8
R3
PH9
R4
PH10
R5
Ph11
R6
Ph12
R7
PG6
G0
PE5
G1
PE6
G2
PH13
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4.3inch Capacitive Touch LCD User Manual
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G3
Ph14
G4
PH15
G5
PI0
G6
PI1
G7
PI2
B0
PE4
B1
PG12
B2
PD6
B3
PG11
B4
PI4
B5
PI5
B6
Pb8
B7
Pb9
DISP
No connect (or set it to High)
CLK
pg7
VSYNC
pi9
HSYNC
pi10
DE
pf10
GND
GND
EXPECTED RESULT
1. DISPLAY a picture
2. Display English and Chinese characters
3. Draw points, line, rectangle and circle
4. Display points touched by fingers, supports up to 5-points touch
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4.3inch Capacitive Touch LCD User Manual
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FAQ
1. Why the codes used RGB565 instead of RGB888 for color displaying?
- The data of RGB888 are too much, required much more RAM. SDRAM is 16-bit input/output. If
we use RGB888, we should save RGB data by writing several times, and cost much more times
and CPU. In fact, even we use RGB565 to transmit data, LCD controller will convert it to RGB888
format and needn’t cost external CPU
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