Please connect the LCD to your Raspberry Pi by the 8PIN cable according to the table below
Use the pin header or PH2.0 8PIN interface, you need to connect according to the following table
LCD
Raspberry Pi
BCM2835
Board
VCC
3.3V
3.3V
GND
GND
GND
DIN
MOSI
19
CLK
SCLK
23
CS
CE0
24
DS
25
22
RST
27
13
BL
18
12
The 1.28inch LCD uses the PH2.0 8PIN interface, which can be connected to the Raspberry Pi according to the above table: (Please connect according to the pin definition table. The color of the wiring in the picture is for reference only, and the actual color shall prevail.)
STM32
The example we provide is based on STM32F103RBT6, and the connection method provided is also the corresponding pin of STM32F103RBT6. If you need to transplant the program, please connect according to the actual pin.
LCD
STM32
VCC
3.3V
GND
GND
DIN
PA7
CLK
PA5
CS
PB6
DC
PA8
RST
PA9
BL
PC7
Arduino
LCD
UNO
VCC
5V
GND
GND
DIN
D11
CLK
D13
CS
D10
DC
D7
RST
D8
BL
D9
The connection diagram is as follows (click to enlarge):
LCD & Controller
The built-in driver used in this LCD is GC9A01, with a resolution of 240RGB×240 dots, 129,600 bytes of GRAM inside. This LCD supports 12/16/18-bit data bus MCU interface, namely the formats of RGB444, RGB565, RGB666, which are commonly used.
Most of the LCD controllers can debug their communication ways such as by 8080 parallel interfaces, three-wire SPI, four-wire SPI, and so on. This LCD adopts a four-wire SPI communication interface, which can greatly save the GPIO port, and the communication speed will be faster.
Maybe you have doubts that as the screen is circular, which point is the first pixel? How to determine the coordinates?
In fact, you can presume that a square screen draws an inscribed circle in it. We only display the content in this inscribed circle, and the pixels beside the square are deleted. The same is true for most of the circular LCDs on the market.
Communication Protocol
Note: Different from the traditional SPI protocol: the data line sent from the slave to the host is hidden as the LCD only needs to be displayed. Please refer to the table on Datasheet Page 105.
RESX: reset, it is pulled low when the module is powered on, and it is usually set to 1.
CSX: the slave chip selection and the chip will be enabled only when CS is low.
D/CX: the data/command control pin of the chip, write command when DC = 0, write data when DC=1
SDA: the transmitted data, that is, RGB data;
SCL: the SPI communication clock.
For SPI communication, data is transmitted with timing, that is, the combination of clock phase (CPHA) and clock polarity (CPOL):
The level of CPHA determines whether the data of the serial synchronization clock is collected on the first clock transition edge or the second clock transition edge. When CPHA = 0, data acquisition is performed on the first transition edge;
The level of CPOL determines the idle state level of the serial synchronous clock. CPOL = 0, which is a low level.
As can be seen from the figure, when the first falling edge of SCLK starts to transmit data, 8bit data is transmitted in one clock cycle, using SPI0, bit-by-bit transmission, high-order first, and low-order at last.
Working with Raspberry Pi
Enable SPI interface
PS: If you are using the system of the Bullseye branch, you need to change "apt-get" to "apt", the system of the Bullseye branch only supports Python3.
Open terminal, use command to enter the configuration page
Please make sure the SPI is not occupied by other devices, you can check in the middle of /boot/config.txt
Install Library
If you use bookworm system, only the lgpio library is available, bcm2835 and wiringPi libarary cannot be installed or used. Please note that the python library does not need to install, you can directly run the demo.
BCM2835
#Open the Raspberry Pi terminal and run the following command
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.71.tar.gz
tar zxvf bcm2835-1.71.tar.gz
cd bcm2835-1.71/
sudo ./configure && sudo make && sudo make check && sudo make install
# For more, you can refer to the official website at: http://www.airspayce.com/mikem/bcm2835/
WiringPi
#Open the Raspberry Pi terminal and run the following command
cd
sudo apt-get install wiringpi
#For Raspberry Pi systems after May 2019 (earlier than that can be executed without), an upgrade may be required:
wget https://project-downloads.drogon.net/wiringpi-latest.deb
sudo dpkg -i wiringpi-latest.deb
gpio -v
# Run gpio -v and version 2.52 will appear, if it doesn't it means there was an installation error
# Bullseye branch system using the following command:
git clone https://github.com/WiringPi/WiringPi
cd WiringPi
. /build
gpio -v
# Run gpio -v and version 2.70 will appear, if it doesn't it means there was an installation error
lgpio
#Open the Raspberry Pi terminal and run the following command
wget https://github.com/joan2937/lg/archive/master.zip
unzip master.zip
cd lg-master
sudo make install
#Raspberry Pi 5
sudo apt install python3-rpi-lgpio
#For more details, you can refer to https://github.com/gpiozero/lg
The RaspberryPi series can share a set of programs, because they are all embedded systems, and the compatibility is relatively strong.
The program is divided into bottom-layer hardware interface, middle-layer LCD screen driver, and upper-layer application;
C
Hardware Interface
We have carried out the low-level encapsulation, if you need to know the internal implementation can go to the corresponding directory to check, for the reason the hardware platform and the internal implementation are different.
You can open DEV_Config.c(.h) to see definitions,which in the directory RaspberryPi\c\lib\Config.
1. There are three ways for C to drive: BCM2835 library, WiringPi library, and Dev library respectively
2. We use Dev libraries by default. If you need to change to BCM2835 or WiringPi libraries, please open RaspberryPi\c\Makefile and modify lines 13-15 as follows:
If you need to draw pictures or display Chinese and English characters, we provide some basic functions here about some graphics processing in the directory RaspberryPi\c\lib\GUI\GUI_Paint.c(.h).
The fonts can be found in RaspberryPi\c\lib\Fonts directory.
New Image Properties: Create a new image buffer, this property includes the image buffer name, width, height, flip Angle, and color.
void Paint_NewImage(UBYTE *image, UWORD Width, UWORD Height, UWORD Rotate, UWORD Color)
Parameters:
Image: the name of the image buffer, which is actually a pointer to the first address of the image buffer;
Width: image buffer Width;
Height: the Height of the image buffer;
Rotate: Indicates the rotation Angle of an image
Color: the initial Color of the image;
Select image buffer: The purpose of the selection is that you can create multiple image attributes, there can be multiple images buffer, you can select each image you create.
void Paint_SelectImage(UBYTE *image)
Parameters:
Image: the name of the image buffer, which is actually a pointer to the first address of the image buffer;
Image Rotation: Set the rotation Angle of the selected image, preferably after Paint_SelectImage(), you can choose to rotate 0, 90, 180, 270.
void Paint_SetRotate(UWORD Rotate)
Parameters:
Rotate: ROTATE_0, ROTATE_90, ROTATE_180, and ROTATE_270 correspond to 0, 90, 180, and 270 degrees.
Image mirror flip: Set the mirror flip of the selected image. You can choose no mirror, horizontal mirror, vertical mirror, or image center mirror
void Paint_SetMirroring(UBYTE mirror)
Parameters:
Mirror: indicates the image mirroring mode. MIRROR_NONE, MIRROR_HORIZONTAL, MIRROR_VERTICAL, MIRROR_ORIGIN correspond to no mirror, horizontal mirror, vertical mirror, and image center mirror respectively.
Set points of the display position and color in the buffer: here is the core GUI function, processing points display position and color in the buffer.
void Paint_SetPixel(UWORD Xpoint, UWORD Ypoint, UWORD Color)
Parameters:
Xpoint: the X position of a point in the image buffer
Ypoint: Y position of a point in the image buffer
Color: indicates the Color of the dot
Image buffer fill color: Fills the image buffer with a color, usually used to flash the screen into blank.
void Paint_Clear(UWORD Color)
Parameters:
Color: fill Color
The fill color of a certain window in the image buffer: the image buffer part of the window filled with a certain color, usually used to fresh the screen into blank, often used for time display, fresh the last second of the screen.
void Paint_ClearWindows(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color)
Parameters:
Xstart: the x-starting coordinate of the window
Ystart: the y-starting coordinate of the window
Xend: the x-end coordinate of the window
Yend: the y-end coordinate of the window
Color: fill Color
Draw point: In the image buffer, draw points on (Xpoint, Ypoint), you can choose the color, the size of the point, the style of the point.
void Paint_DrawPoint(UWORD Xpoint, UWORD Ypoint, UWORD Color, DOT_PIXEL Dot_Pixel, DOT_STYLE Dot_Style)
Parameters:
Xpoint: indicates the X coordinate of a point.
Ypoint: indicates the Y coordinate of a point.
Color: fill Color
Dot_Pixel: The size of the dot, the demo provides 8 size pointss by default.
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Dot_Style: the size of a point that expands from the center of the point or from the bottom left corner of the point to the right and up.
typedef enum {
DOT_FILL_AROUND = 1,
DOT_FILL_RIGHTUP,
} DOT_STYLE;
Draw line: In the image buffer, draw line from (Xstart, Ystart) to (Xend, Yend), you can choose the color, the width and the style of the line.
void Paint_DrawLine(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color, LINE_STYLE Line_Style , LINE_STYLE Line_Style)
Parameters:
Xstart: the x-starting coordinate of a line
Ystart: the y-starting coordinate of the a line
Xend: the x-end coordinate of a line
Yend: the y-end coordinate of a line
Color: fill Color
Line_width: The width of the line, the demo provides 8 sizes of width by default.
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Line_Style: line style. Select whether the lines are joined in a straight or dashed way.
typedef enum {
LINE_STYLE_SOLID = 0,
LINE_STYLE_DOTTED,
} LINE_STYLE;
Draw rectangle: In the image buffer, draw a rectangle from (Xstart, Ystart) to (Xend, Yend), you can choose the color, the width of the line, whether to fill the inside of the rectangle.
void Paint_DrawRectangle(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color, DOT_PIXEL Line_width, DRAW_FILL Draw_Fill)
Parameters:
Xstart: the starting X coordinate of the rectangle
Ystart: the starting Y coordinate of the rectangle
Xend: the x-end coordinate of the rectangle
Yend: the y-end coordinate of the rectangle
Color: fill Color
Line_width: The width of the four sides of a rectangle. And the demo provides 8 sizes of width by default.
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Draw_Fill: Fill, whether to fill the inside of the rectangle
typedef enum {
DRAW_FILL_EMPTY = 0,
DRAW_FILL_FULL,
} DRAW_FILL;
Draw circle: In the image buffer, draw a circle of Radius with (X_Center Y_Center) as the center. You can choose the color, the width of the line, and whether to fill the inside of the circle.
void Paint_DrawCircle(UWORD X_Center, UWORD Y_Center, UWORD Radius, UWORD Color, DOT_PIXEL Line_width, DRAW_FILL Draw_Fill)
Parameters:
X_Center: the x-coordinate of the center of the circle
Y_Center: the y-coordinate of the center of the circle
Radius: indicates the Radius of a circle
Color: fill Color
Line_width: The width of the arc, with a default of 8 widths
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Draw_Fill: fill, whether to fill the inside of the circle
typedef enum {
DRAW_FILL_EMPTY = 0,
DRAW_FILL_FULL,
} DRAW_FILL;
Write Ascii character: In the image buffer, use (Xstart Ystart) as the left vertex, write an Ascii character, you can select Ascii visual character library, font foreground color, font background color.
void Paint_DrawChar(UWORD Xstart, UWORD Ystart, const char Ascii_Char, sFONT* Font, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y-coordinate of the left vertex of a character
Ascii_Char: indicates the Ascii character
Font: Ascii visual character library, in the Fonts folder the demo provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Write English string: In the image buffer, use (Xstart Ystart) as the left vertex, write a string of English characters, you can choose Ascii visual character library, font foreground color, font background color.
void Paint_DrawString_EN(UWORD Xstart, UWORD Ystart, const char * pString, sFONT* Font, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
PString: string, string is a pointer
Font: Ascii visual character library, in the Fonts folder the demo provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Write Chinese string: in the image buffer, use (Xstart Ystart) as the left vertex, write a string of Chinese characters, you can choose character font, font foreground color, and font background color of the GB2312 encoding.
void Paint_DrawString_CN(UWORD Xstart, UWORD Ystart, const char * pString, cFONT* font, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
PString: string, string is a pointer
Font: GB2312 encoding character Font library, in the Fonts folder the demo provides the following Fonts:
Font12CN: ASCII font 11*21, Chinese font 16*21
Font24CN: ASCII font24 *41, Chinese font 32*41
Color_Foreground: Font color
Color_Background: indicates the background color
Write numbers: In the image buffer,use (Xstart Ystart) as the left vertex, write a string of numbers, you can choose Ascii visual character library, font foreground color, font background color.
void Paint_DrawNum(UWORD Xpoint, UWORD Ypoint, double Nummber, sFONT* Font, UWORD Digit, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xpoint: the x-coordinate of the left vertex of a character
Ypoint: the Y coordinate of the left vertex of the font
Nummber: indicates the number displayed, which can be a decimal
Digit: It's a decimal number
Font: Ascii visual character library, in the Fonts folder the demo provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Display time: in the image buffer,use (Xstart Ystart) as the left vertex, display time,you can choose Ascii visual character font, font foreground color, font background color.
void Paint_DrawTime(UWORD Xstart, UWORD Ystart, PAINT_TIME *pTime, sFONT* Font, UWORD Color_Background, UWORD Color_Foreground)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
PTime: display time, A time structure is defined here, as long as the hours, minutes, and seconds are passed to the parameters;
Font: Ascii visual character library, in the Fonts folder the demo provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Read the local bmp image and write it to the cache.
For Linux operating systems such as Raspberry Pi, you can read and write pictures. For Raspberry Pi, in the directory: RaspberryPi\c\lib\GUI\GUI_BMPfile.c(.h).
UBYTE GUI_ReadBmp(const char *path, UWORD Xstart, UWORD Ystart)
parameter:
path: the relative path of the BMP image
Xstart: The X coordinate of the left vertex of the image, generally 0 is passed by default
Ystart: The Y coordinate of the left vertex of the picture, generally 0 by default
Testing Code for Users
For Raspberry Pi, in the directory: RaspberryPi\c\examples, for all the test code;
If you need to run the 0.96-inch LCD test program, you need to add 0.96 as a parameter when running the main demo.
Re-execute in Linux command mode as follows:
make clean
make
sudo ./main 0.96
Python (for Raspberry Pi)
Works with python and python3.
For python, his calls are not as complicated as C.
Raspberry Pi: RaspberryPi\python\lib\
lcdconfig.py
Module initialization and exit processing.
def module_init()
def module_exit()
Note:
1. Here is some GPIO processing before and after using the LCD screen.
2. The module_init() function is automatically called in the INIT () initializer on the LCD, but the module_exit() function needs to be called by itself.
The first parameter defines the color depth of the image, which is defined as "1" to indicate the bitmap of one-bit depth. The second parameter is a tuple that defines the width and height of the image. The third parameter defines the default color of the buffer, which is defined as "WHITE".
Create a drawing object based on Image1 on which all drawing operations will be performed on here.
draw = ImageDraw.Draw(image1)
Draw a line.
draw.line([(20, 10),(70, 60)], fill = "RED",width = 1)
The first parameter is a four-element tuple starting at (0, 0) and ending at (127,0). Draw a line. Fill ="0" means the color of the line is white.
The first argument is a tuple of four elements. (20,10) is the coordinate value in the upper left corner of the rectangle, and (70,60) is the coordinate value in the lower right corner of the rectangle. Fill =" WHITE" means BLACK inside, and outline="BLACK" means the color of the outline is black.
Draw a circle.
draw.arc((150,15,190,55),0, 360, fill =(0,255,0)
Draw an inscribed circle in the square, the first parameter is a tuple of 4 elements, with (150, 15) as the upper left corner vertex of the square, (190, 55) as the lower right corner vertex of the square, specifying the level median line of the rectangular frame is the angle of 0 degrees, the second parameter indicates the starting angle, the third parameter indicates the ending angle, and fill = 0 indicates that the color of the line is white. If the figure is not square according to the coordination, you will get an ellipse.
Besides the arc function, you can also use the chord function for drawing a solid circle.
draw.ellipse((150,65,190,105), fill = 0)
The first parameter is the coordination of the enclosing rectangle. The second and third parameters are the beginning and end degrees of the circle. The fourth parameter is the fill color of the circle.
Character.
The ImageFont module needs to be imported and instantiated:
You can use the fonts of Windows or other fonts which is in ttc format..
Note: Each character library contains different characters; If some characters cannot be displayed, it is recommended that you can refer to the encoding set ro used. To draw English characters, you can directly use the fonts; for Chinese characters, you need to add a symbol u:
draw.text((40, 50), 'WaveShare', fill = (128,255,128),font=Font2)
text= u"微雪电子"
draw.text((74, 150),text, fill = "WHITE",font=Font3)
The first parameter is a tuple of 2 elements, with (40, 50) as the left vertex, the font is Font2, and the fill is the font color. You can directly make fill = "WHITE", because the regular color value is already defined Well, of course, you can also use fill = (128,255,128), the parentheses correspond to the values of the three RGB colors so that you can precisely control the color you want. The second sentence shows Micro Snow Electronics, using Font3, the font color is white.
read local image
image = Image.open('../pic/LCD_1inch28.jpg')
The parameter is the image path.
Other functions.
Using with STM32
Software description
The demo is developed based on the HAL library. Download the demo, find the STM32 program file directory, and open the LCD_demo.uvprojx in the STM32\STM32F103RBT6\MDK-ARM directory to check the program.
Open main.c, you can see all the test programs, remove the comments in front of the test programs on the corresponding screen, and recompile and download.
LCD_0in96_test() 0.96inch LCD test program
LCD_1in14_test() 1.14inch LCD test program
LCD_1in28_test() 1.28inch LCD test program
LCD_1in3_test() 1.3 inch LCD test program
LCD_1in54_test() 1.54inch LCD test program
LCD_1in8_test() 1.8inch LCD test program
LCD_2in_test() 2inch LCD test program
UBYTE System_Init(void);
void System_Exit(void);
Note:
1.here is some GPIO processing before and after using the LCD screen.
2.After the System_Exit(void) function is used, the OLED display will be turned off;
For the screen, if you need to draw pictures, display Chinese and English characters, display pictures, etc., you can use the upper application to do, and we provide some basic functions here about some graphics processing in the directory STM32\STM32F103RB\User\GUI_DEV\GUI_Paint.c(.h)
Note: Because of the size of the internal RAM of STM32 and arduino, the GUI is directly written to the RAM of the LCD.
The character font which GUI dependent is in the directory STM32\STM32F103RB\User\Fonts
New Image Properties: Create a new image property, this property includes the image buffer name, width, height, flip Angle, color.
void Paint_NewImage(UWORD Width, UWORD Height, UWORD Rotate, UWORD Color)
Parameters:
Width: image buffer Width;
Height: the Height of the image buffer;
Rotate: Indicates the rotation Angle of an image
Color: the initial Color of the image;
Set the clear screen function, usually call the clear function of LCD directly.
void Paint_SetClearFuntion(void (*Clear)(UWORD));
parameter:
Clear : Pointer to the clear screen function, used to quickly clear the screen to a certain color;
Set the drawing pixel function
void Paint_SetDisplayFuntion(void (*Display)(UWORD,UWORD,UWORD));
parameter:
Display: Pointer to the pixel drawing function, which is used to write data to the specified location in the internal RAM of the LCD;
Select image buffer:the purpose of the selection is that you can create multiple image attributes, image buffer can exist multiple, you can select each image you create.
void Paint_SelectImage(UBYTE *image)
Parameters:
Image: the name of the image cache, which is actually a pointer to the first address of the image buffer
Image Rotation: Set the selected image rotation Angle, preferably after Paint_SelectImage(), you can choose to rotate 0, 90, 180, 270.
void Paint_SetRotate(UWORD Rotate)
Parameters:
Rotate: ROTATE_0, ROTATE_90, ROTATE_180, and ROTATE_270 correspond to 0, 90, 180, and 270 degrees respectively;
Image mirror flip: Set the mirror flip of the selected image. You can choose no mirror, horizontal mirror, vertical mirror, or image center mirror.
void Paint_SetMirroring(UBYTE mirror)
Parameters:
Mirror: indicates the image mirroring mode. MIRROR_NONE, MIRROR_HORIZONTAL, MIRROR_VERTICAL, MIRROR_ORIGIN correspond to no mirror, horizontal mirror, vertical mirror, and about image center mirror respectively.
Set points of display position and color in the buffer: here is the core GUI function, processing points display position and color in the buffer.
void Paint_SetPixel(UWORD Xpoint, UWORD Ypoint, UWORD Color)
Parameters:
Xpoint: the X position of a point in the image buffer
Ypoint: Y position of a point in the image buffer
Color: indicates the Color of the dot
Image buffer fill color: Fills the image buffer with a color, usually used to flash the screen into blank.
void Paint_Clear(UWORD Color)
Parameters:
Color: fill Color
Image buffer part of the window filling color: the image buffer part of the window filled with a certain color, generally as a window whitewashing function, often used for time display, whitewashing on a second
void Paint_ClearWindows(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color)
Parameters:
Xstart: the x-starting coordinate of the window
Ystart: indicates the Y starting point of the window
Xend: the x-end coordinate of the window
Yend: indicates the y-end coordinate of the window
Color: fill Color
Draw points: In the image buffer, draw points on (Xpoint, Ypoint), you can choose the color, the size of the point, the style of the point.
void Paint_DrawPoint(UWORD Xpoint, UWORD Ypoint, UWORD Color, DOT_PIXEL Dot_Pixel, DOT_STYLE Dot_Style)
Parameters:
Xpoint: indicates the X coordinate of a point
Ypoint: indicates the Y coordinate of a point
Color: fill Color
Dot_Pixel: The size of the dot, providing a default of eight size points
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Dot_Style: the size of a point that expands from the center of the point or from the bottom left corner of the point to the right and up
typedef enum {
DOT_FILL_AROUND = 1,
DOT_FILL_RIGHTUP,
} DOT_STYLE;
Line drawing: In the image buffer, line from (Xstart, Ystart) to (Xend, Yend), you can choose the color, line width, line style.
void Paint_DrawLine(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color, LINE_STYLE Line_Style , LINE_STYLE Line_Style)
Parameters:
Xstart: the x-starting coordinate of a line
Ystart: indicates the Y starting point of a line
Xend: x-terminus of a line
Yend: the y-end coordinate of a line
Color: fill Color
Line_width: The width of the line, which provides a default of eight widths
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Line_Style: line style. Select whether the lines are joined in a straight or dashed way
typedef enum {
LINE_STYLE_SOLID = 0,
LINE_STYLE_DOTTED,
} LINE_STYLE;
Draw rectangle: In the image buffer, draw a rectangle from (Xstart, Ystart) to (Xend, Yend), you can choose the color, the width of the line, whether to fill the inside of the rectangle.
void Paint_DrawRectangle(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color, DOT_PIXEL Line_width, DRAW_FILL Draw_Fill)
Parameters:
Xstart: the starting X coordinate of the rectangle
Ystart: indicates the Y starting point of the rectangle
Xend: X terminus of the rectangle
Yend: specifies the y-end coordinate of the rectangle
Color: fill Color
Line_width: The width of the four sides of a rectangle. Default eight widths are provided
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Draw_Fill: Fill, whether to fill the inside of the rectangle
typedef enum {
DRAW_FILL_EMPTY = 0,
DRAW_FILL_FULL,
} DRAW_FILL;
Draw circle: In the image buffer, draw a circle of Radius with (X_Center Y_Center) as the center. You can choose the color, the width of the line, and whether to fill the inside of the circle.
void Paint_DrawCircle(UWORD X_Center, UWORD Y_Center, UWORD Radius, UWORD Color, DOT_PIXEL Line_width, DRAW_FILL Draw_Fill)
Parameters:
X_Center: the x-coordinate of the center of a circle
Y_Center: Y coordinate of the center of a circle
Radius: indicates the Radius of a circle
Color: fill Color
Line_width: The width of the arc, with a default of 8 widths
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Draw_Fill: fill, whether to fill the inside of the circle
typedef enum {
DRAW_FILL_EMPTY = 0,
DRAW_FILL_FULL,
} DRAW_FILL;
Write Ascii character: In the image buffer, at (Xstart Ystart) as the left vertex, write an Ascii character, you can select Ascii visual character library, font foreground color, font background color.
void Paint_DrawChar(UWORD Xstart, UWORD Ystart, const char Ascii_Char, sFONT* Font, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
Ascii_Char: indicates the Ascii character
Font: Ascii visual character library, in the Fonts folder provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Write English string: In the image buffer, use (Xstart Ystart) as the left vertex, write a string of English characters, can choose Ascii visual character library, font foreground color, font background color.
void Paint_DrawString_EN(UWORD Xstart, UWORD Ystart, const char * pString, sFONT* Font, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
PString: string, string is a pointer
Font: Ascii visual character library, in the Fonts folder provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Write Chinese string: in the image buffer, use (Xstart Ystart) as the left vertex, write a string of Chinese characters, you can choose GB2312 encoding character font, font foreground color, font background color.
void Paint_DrawString_CN(UWORD Xstart, UWORD Ystart, const char * pString, cFONT* font, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
PString: string, string is a pointer
Font: GB2312 encoding character Font library, in the Fonts folder provides the following Fonts:
Font12CN: ASCII font 11*21, Chinese font 16*21
Font24CN: ASCII font24 *41, Chinese font 32*41
Color_Foreground: Font color
Color_Background: indicates the background color
Write numbers: In the image buffer,use (Xstart Ystart) as the left vertex, write a string of numbers, you can choose Ascii visual character library, font foreground color, font background color.
void Paint_DrawNum(UWORD Xpoint, UWORD Ypoint, double Nummber, sFONT* Font, UWORD Digit, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xpoint: the x-coordinate of the left vertex of a character
Ypoint: the Y coordinate of the left vertex of the font
Nummber: indicates the number displayed, which can be a decimal
Digit: It's a decimal number
Font: Ascii visual character library, in the Fonts folder provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Display time: in the image buffer,use (Xstart Ystart) as the left vertex, display time,you can choose Ascii visual character font, font foreground color, font background color.
void Paint_DrawTime(UWORD Xstart, UWORD Ystart, PAINT_TIME *pTime, sFONT* Font, UWORD Color_Background, UWORD Color_Foreground)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
PTime: display time, here defined a good time structure, as long as the hour, minute and second bits of data to the parameter;
Font: Ascii visual character library, in the Fonts folder provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Arduino Software Description
Run program
Please select the corresponding program according to the LCD screen model to open
You can view test programs for all screen sizes, sorted by size:
For example, 1.54inch LCD Module. Open the LCD_1inch54 folder and run the LCD_1inch54.ino file.
Open the program, select the development board model Arduino UNO
Select the corresponding COM port
Then click to compile and download
Program Description
Document Introduction
Take Arduino UNO controlling a 1.54-inch LCD as an example, open the Arduino\LCD_1inch54 directory:
Of which:
LCD_1inch54.ino: open with Arduino IDE;
LCD_Driver.cpp(.h): is the driver of the LCD screen;
DEV_Config.cpp(.h): It is the hardware interface definition, which encapsulates the read and write pin levels, SPI transmission data, and pin initialization;
font8.cpp, font12.cpp, font16.cpp, font20.cpp, font24.cpp, font24CN.cpp, fonts.h: fonts for characters of different sizes;
image.cpp(.h): is the image data, which can convert any BMP image into a 16-bit true color image array through Img2Lcd (downloadable in the development data).
The program is divided into bottom-layer hardware interface, middle-layer LCD screen driver, and upper-layer application;
Underlying hardware interface
The hardware interface is defined in the two files DEV_Config.cpp(.h), and functions such as read and write pin level, delay, and SPI transmission are encapsulated.
write pin level
void DEV_Digital_Write(int pin, int value)
The first parameter is the pin, and the second is the high and low level.
Read pin level
int DEV_Digital_Read(int pin)
The parameter is the pin, and the return value is the level of the read pin.
Delay
DEV_Delay_ms(unsigned int delaytime)
millisecond level delay.
SPI output data
DEV_SPI_WRITE(unsigned char data)
The parameter is char type, occupying 8 bits.
The upper application
For the screen, if you need to draw pictures, display Chinese and English characters, display pictures, etc., you can use the upper application to do, and we provide some basic functions here about some graphics processing in the directory GUI_Paint.c(.h)
Note: Because of the size of the internal RAM of STM32 and arduino, the GUI is directly written to the RAM of the LCD.
The fonts used by the GUI all depend on the font*.cpp(h) files under the same file
New Image Properties: Create a new image property, this property includes the image buffer name, width, height, flip Angle, color.
void Paint_NewImage(UWORD Width, UWORD Height, UWORD Rotate, UWORD Color)
Parameters:
Width: image buffer Width;
Height: the Height of the image buffer;
Rotate: Indicates the rotation Angle of an image
Color: the initial Color of the image;
Set the clear screen function, usually call the clear function of LCD directly.
void Paint_SetClearFuntion(void (*Clear)(UWORD));
parameter:
Clear : Pointer to the clear screen function, used to quickly clear the screen to a certain color;
Set the drawing pixel function.
void Paint_SetDisplayFuntion(void (*Display)(UWORD,UWORD,UWORD));
parameter:
Display: Pointer to the pixel drawing function, which is used to write data to the specified location in the internal RAM of the LCD;
Select image buffer:the purpose of the selection is that you can create multiple image attributes, image buffer can exist multiple, you can select each image you create.
void Paint_SelectImage(UBYTE *image)
Parameters:
Image: the name of the image cache, which is actually a pointer to the first address of the image buffer
Image Rotation: Set the selected image rotation Angle, preferably after Paint_SelectImage(), you can choose to rotate 0, 90, 180, 270.
void Paint_SetRotate(UWORD Rotate)
Parameters:
Rotate: ROTATE_0, ROTATE_90, ROTATE_180, and ROTATE_270 correspond to 0, 90, 180, and 270 degrees respectively;
Image mirror flip: Set the mirror flip of the selected image. You can choose no mirror, horizontal mirror, vertical mirror,or image center mirror.
void Paint_SetMirroring(UBYTE mirror)
Parameters:
Mirror: indicates the image mirroring mode. MIRROR_NONE, MIRROR_HORIZONTAL, MIRROR_VERTICAL, MIRROR_ORIGIN correspond to no mirror, horizontal mirror, vertical mirror, and about image center mirror respectively.
Set points of display position and color in the buffer: here is the core GUI function, processing points display position and color in the buffer.
void Paint_SetPixel(UWORD Xpoint, UWORD Ypoint, UWORD Color)
Parameters:
Xpoint: the X position of a point in the image buffer
Ypoint: Y position of a point in the image buffer
Color: indicates the Color of the dot
Image buffer fill color: Fills the image buffer with a color, usually used to flash the screen into blank.
void Paint_ClearWindows(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color)
Parameters:
Xstart: the x-starting coordinate of the window
Ystart: indicates the Y starting point of the window
Xend: the x-end coordinate of the window
Yend: indicates the y-end coordinate of the window
Color: fill Color
Draw points: In the image buffer, draw points on (Xpoint, Ypoint), you can choose the color, the size of the point, the style of the point.
void Paint_DrawPoint(UWORD Xpoint, UWORD Ypoint, UWORD Color, DOT_PIXEL Dot_Pixel, DOT_STYLE Dot_Style)
Parameters:
Xpoint: indicates the X coordinate of a point
Ypoint: indicates the Y coordinate of a point
Color: fill Color
Dot_Pixel: The size of the dot, providing a default of eight size points
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Dot_Style: the size of a point that expands from the center of the point or from the bottom left corner of the point to the right and up
typedef enum {
DOT_FILL_AROUND = 1,
DOT_FILL_RIGHTUP,
} DOT_STYLE;
Line drawing: In the image buffer, line from (Xstart, Ystart) to (Xend, Yend), you can choose the color, line width, line style.
void Paint_DrawLine(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color, LINE_STYLE Line_Style , LINE_STYLE Line_Style)
Parameters:
Xstart: the x-starting coordinate of a line
Ystart: indicates the Y starting point of a line
Xend: x-terminus of a line
Yend: the y-end coordinate of a line
Color: fill Color
Line_width: The width of the line, which provides a default of eight widths
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Line_Style: line style. Select whether the lines are joined in a straight or dashed way
typedef enum {
LINE_STYLE_SOLID = 0,
LINE_STYLE_DOTTED,
} LINE_STYLE;
Draw rectangle: In the image buffer, draw a rectangle from (Xstart, Ystart) to (Xend, Yend), you can choose the color, the width of the line, whether to fill the inside of the rectangle.
void Paint_DrawRectangle(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color, DOT_PIXEL Line_width, DRAW_FILL Draw_Fill)
Parameters:
Xstart: the starting X coordinate of the rectangle
Ystart: indicates the Y starting point of the rectangle
Xend: X terminus of the rectangle
Yend: specifies the y-end coordinate of the rectangle
Color: fill Color
Line_width: The width of the four sides of a rectangle. Default eight widths are provided
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Draw_Fill: Fill, whether to fill the inside of the rectangle
typedef enum {
DRAW_FILL_EMPTY = 0,
DRAW_FILL_FULL,
} DRAW_FILL;
Draw circle: In the image buffer, draw a circle of Radius with (X_Center Y_Center) as the center. You can choose the color, the width of the line, and whether to fill the inside of the circle.
void Paint_DrawCircle(UWORD X_Center, UWORD Y_Center, UWORD Radius, UWORD Color, DOT_PIXEL Line_width, DRAW_FILL Draw_Fill)
Parameters:
X_Center: the x-coordinate of the center of a circle
Y_Center: Y coordinate of the center of a circle
Radius: indicates the Radius of a circle
Color: fill Color
Line_width: The width of the arc, with a default of 8 widths
typedef enum {
DOT_PIXEL_1X1 = 1, // 1 x 1
DOT_PIXEL_2X2 , // 2 X 2
DOT_PIXEL_3X3 , // 3 X 3
DOT_PIXEL_4X4 , // 4 X 4
DOT_PIXEL_5X5 , // 5 X 5
DOT_PIXEL_6X6 , // 6 X 6
DOT_PIXEL_7X7 , // 7 X 7
DOT_PIXEL_8X8 , // 8 X 8
} DOT_PIXEL;
Draw_Fill: fill, whether to fill the inside of the circle
typedef enum {
DRAW_FILL_EMPTY = 0,
DRAW_FILL_FULL,
} DRAW_FILL;
Write Ascii character: In the image buffer, at (Xstart Ystart) as the left vertex, write an Ascii character, you can select Ascii visual character library, font foreground color, font background color.
void Paint_DrawChar(UWORD Xstart, UWORD Ystart, const char Ascii_Char, sFONT* Font, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
Ascii_Char: indicates the Ascii character
Font: Ascii visual character library, in the Fonts folder provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Write English string: In the image buffer, use (Xstart Ystart) as the left vertex, write a string of English characters, can choose Ascii visual character library, font foreground color, font background color.
void Paint_DrawString_EN(UWORD Xstart, UWORD Ystart, const char * pString, sFONT* Font, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
PString: string, string is a pointer
Font: Ascii visual character library, in the Fonts folder provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Write Chinese string: in the image buffer, use (Xstart Ystart) as the left vertex, write a string of Chinese characters, you can choose GB2312 encoding character font, font foreground color, font background color.
void Paint_DrawString_CN(UWORD Xstart, UWORD Ystart, const char * pString, cFONT* font, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
PString: string, string is a pointer
Font: GB2312 encoding character Font library, in the Fonts folder provides the following Fonts:
Font12CN: ASCII font 11*21, Chinese font 16*21
Font24CN: ASCII font24 *41, Chinese font 32*41
Color_Foreground: Font color
Color_Background: indicates the background color
Write numbers: In the image buffer,use (Xstart Ystart) as the left vertex, write a string of numbers, you can choose Ascii visual character library, font foreground color, font background color.
void Paint_DrawNum(UWORD Xpoint, UWORD Ypoint, double Nummber, sFONT* Font, UWORD Digit, UWORD Color_Foreground, UWORD Color_Background)
Parameters:
Xpoint: the x-coordinate of the left vertex of a character
Ypoint: the Y coordinate of the left vertex of the font
Nummber: indicates the number displayed, which can be a decimal
Digit: It's a decimal number
Font: Ascii visual character library, in the Fonts folder provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Write numbers with decimals: at (Xstart Ystart) as the left vertex, write a string of numbers with decimals, you can choose Ascii code visual character font, font foreground color, font background color
void Paint_DrawFloatNum(UWORD Xpoint, UWORD Ypoint, double Nummber, UBYTE Decimal_Point, sFONT* Font, UWORD Color_Foreground, UWORD Color_Background);
parameter:
Xstart: the X coordinate of the left vertex of the character
Ystart: Y coordinate of the left vertex of the font
Nummber: the displayed number, which is saved in double type here
Decimal_Point: Displays the number of digits after the decimal point
Font: Ascii code visual character font library, the following fonts are provided in the Fonts folder:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: font color
Color_Background: background color
Display time: in the image buffer,use (Xstart Ystart) as the left vertex, display time,you can choose Ascii visual character font, font foreground color, font background color.
void Paint_DrawTime(UWORD Xstart, UWORD Ystart, PAINT_TIME *pTime, sFONT* Font, UWORD Color_Background, UWORD Color_Foreground)
Parameters:
Xstart: the x-coordinate of the left vertex of a character
Ystart: the Y coordinate of the font's left vertex
PTime: display time, here defined a good time structure, as long as the hour, minute and second bits of data to the parameter;
Font: Ascii visual character library, in the Fonts folder provides the following Fonts:
Font8: 5*8 font
Font12: 7*12 font
Font16: 11*16 font
Font20: 14*20 font
Font24: 17*24 font
Color_Foreground: Font color
Color_Background: indicates the background color
Display image: at (Xstart Ystart) as the left vertex, display an image whose width is W_Image and height is H_Image;
void Paint_DrawImage(const unsigned char *image, UWORD xStart, UWORD yStart, UWORD W_Image, UWORD H_Image)
parameter:
image: image address, pointing to the image information you want to display
Xstart: the X coordinate of the left vertex of the character
Ystart: Y coordinate of the left vertex of the font
W_Image: Image width
H_Image: Image height
Take the developed by our company as an example, the connection is as follows:
Test programs for all screens can be viewed, sorted by size:
0inch96_LCD_test.py: 0.96inch LCD test program
1inch14_LCD_test.py: 1.14inch LCD test program
1inch28_LCD_test.py: 1.28inch LCD test program
1inch3_LCD_test.py: 1.3inch LCD test program
1inch47_LCD_test.py: 1.47inch LCD test program
1inch54_LCD_test.py: 1.54inchLCD test program
1inch8_LCD_test.py: 1.8inch LCD test program
2inch_LCD_test.py: 2inch LCD test program
2inch4_LCD_test.py: 2inch4 LCD test program
Python has an image library , it does not need to write code from the logical layer like C and can directly call to the image library for image processing. The following will take a 1.54-inch LCD as an example, we provide a brief description of the demo.
For more information, you can refer to pil
Note: The demos are all tested on Arduino uno. If you need other types of Arduino, you need to determine whether the connected pins are correct.
In the product encyclopedia interface download , and then unzip it. The Arduino program is located at ~/Arduino/…
