Pico Quick Start

Hardware connection

Please take care of the direction when you connect Pico, a USB port is printed to indicate. You can also check the pin of Pico and the LCD board when connecting.
You can connect the display according to the table.

Pico Pin Correspondence
LCD	Pico	Function
VCC	VSYS	Power Input
GND	GND	Ground
DIN	GP11	SPI MOSI pin, input from the device data
CLK	GP10	SPI SCK pin, input from the device clock
CS	GP9	SPI chip select (low active)
DC	GP8	Data/command control pin (high for data, low for command)
RST	GP12	External reset pin
BL	GP13	Backlight control
KEY0	GP15	User KEY0
KEY1	GP17	User KEY1
KEY2	GP2	User KEY2
KEY3	GP3	User KEY3

Connection (Directly)

Connection (with adapter board)

Setup environment

Please refer to Raspberry Pi's guide: https://www.raspberrypi.org/documentation/pico/getting-started/

Download Demo codes

Open the terminal and run the following command：

sudo apt-get install p7zip-full
cd ~
sudo wget  https://files.waveshare.com/upload/2/28/Pico_code.7z
7z x Pico_code.7z -o./Pico_code
cd ~/Pico_code
cd c/build/

Run the Demo codes

This guide is based on Raspberry Pi.

C examples

Open a terminal and enter the directory of C codes:

cd ~/Pico_code/c/

Modify the main.c file and define the type according to the type.

sudo nano main.c

Create a build folder and add SDK:
For example, if the path of SDK is ../../pico-sdk
Then you should create build and add the path like these:

mkdir build
cd build
export PICO_SDK_PATH=../../pico-sdk

Run cmake.. command to to generate Makefile file.

cmake ..

Run make command to build.

make -j

After building, a uf2 file is generated. You need to hold the button of the Pico board and connect it to Raspberry Pi or PC by USB cable. Then the Pico board is recognized as a portable drive (RPI-RP2). Copy the main.uf2 file generated to the drive.

cp main.uf2 /media/pi/RPI-RP2/

Python examples

Hold the button of the Pico board, and connect it to Raspberry Pi or PC by USB cable. Then the Pico board is recognized as a portable drive (RPI-RP2).
Copy the pico_micropython_20210121.uf2 file to the drive, the file is saved in the python directory.
Update your Thonny IDE to the newest version.

 sudo apt upgrade thonny

Open the Thonny IDE, choose Tools -> Options... -> Interpreter/. Set the MicroPython to ARaspberry Pi Pico and the port is ttyACM0
Open the python/Pico-LCD-1.44/Pico-LCD-1.44.py file in IDE and run it.

Codes Analysis

C

Bottom hardware interface

We package the hardware layer for easily porting to the different hardware platforms.
DEV_Config.c(.h) in the directory:...\c\lib \Config

Data type：

#define UBYTE   uint8_t
#define UWORD   uint16_t
#define UDOUBLE uint32_t

Module initialize and exit:

void DEV_Module_Init(void);
void DEV_Module_Exit(void);
Note：
1. The functions above are used to initialize the display or exit handle.

GPIO write/read：

void 	DEV_Digital_Write(UWORD Pin, UBYTE Value);
UBYTE 	DEV_Digital_Read(UWORD Pin);

SPI transmits data

void DEV_SPI_WriteByte(UBYTE Value);

Application functions

We provide basic GUI functions for testing, like draw point, line, string, and so on. The GUI function can be found in directory:..\c\lib\GUI\GUI_Paint.c(.h).

The fonts used can be found in the directory: RaspberryPi\c\lib\Fonts.

Create a new image, you can set the image name, width, height, rotate angle, and color.

void Paint_NewImage(UWORD *image, UWORD Width, UWORD Height, UWORD Rotate, UWORD Color, UWORD Depth)
Parameter:
 	image: Name of the image buffer, this is a pointer;
 	Width: Width of the image;
 	Height: Height of the image;
 	Rotate: Rotate the angle of the Image;
 	Color: The initial color of the image;
 	Depth: Depth of the color

Select image buffer: You can create multiple image buffers at the same time select a certain one and draw by this function.

void Paint_SelectImage(UBYTE *image)
Parameter:
 	image: The name of the image buffer, this is a pointer;

Rotate image: You need to set the rotation angle of the image, this function should be used after Paint_SelectImage(). The angle can be 0, 90, 180, 270

void Paint_SetRotate(UWORD Rotate)
Parameter:
 	Rotate: Rotate the angle of the image, the parameter can be ROTATE_0, ROTATE_90, ROTATE_180, ROTATE_270.

【Note】Afer rotating, the place of the first pixel is different as below

Image mirror: This function is used to set the image mirror.

void Paint_SetMirroring(UBYTE mirror)
Parameter:
 	mirror: Mirror type if the image, the parameter can be MIRROR_NONE、MIRROR_HORIZONTAL、MIRROR_VERTICAL、MIRROR_ORIGIN.

Set the position and color of pixels: This is the basic function of GUI, it is used to set the position and color of a pixel in the buffer.

void Paint_SetPixel(UWORD Xpoint, UWORD Ypoint, UWORD Color)
Parameter:
 	Xpoint: The X-axis position of the point in the image buffer
 	Ypoint: The Y-axis position of the point in the image buffer
 	Color: The color of the point

Color of the image: To set the color of the image, this function always be used to clear the display.

void Paint_Clear(UWORD Color)
Parameter:
 	Color: The color of the image

Color of the windows: This function is used to set the color of windows, it is always used for updating partial areas like displaying a clock.

void Paint_ClearWindows(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color)
Parameter:
 	Xstart: X-axis position of the start point.
 	Ystart: Y-axis position of the start point.
 	Xend: X-axis position of the end point.
 	Yend: Y-axis position of the end point
 	Color: Color of the windows.

Draw point: Draw a point at the position (Xpoint, Ypoint) of the image buffer, you can configure the color, size, and style.

void Paint_DrawPoint(UWORD Xpoint, UWORD Ypoint, UWORD Color, DOT_PIXEL Dot_Pixel, DOT_STYLE Dot_Style)
Parameter:
 	Xpoint: X-axis position of the point.
 	Ypoint: Y-axis position of the point
 	Color: Color of the point
 	Dot_Pixel: Size of the point, 8 sizes are available.
 	 	 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 style of the point, defines the extended mode of the point.
 	 	typedef enum {
 	 	   DOT_FILL_AROUND  = 1,		
 	 	   DOT_FILL_RIGHTUP,
 	 	} DOT_STYLE;

Draw the line: Draw a line from (Xstart, Ystart) to (Xend, Yend) in the image buffer, you can configure the color, width, and style.

void Paint_DrawLine(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color, LINE_STYLE Line_Style , LINE_STYLE Line_Style)
Parameter:
 	Xstart: Xstart of the line
 	Ystart: Ystart of the line
 	Xend: Xend of the line
 	Yend: Yend of the line
 	Color: The color of the line
 	Line_width: Width of the line, 8 sizes are available.
 	 	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: Style of the line, Solid or Dotted.
 	 	typedef enum {
 	 	 	 LINE_STYLE_SOLID = 0,
 	 	 	 LINE_STYLE_DOTTED,
 	 	} LINE_STYLE;

Draw a rectangle: Draw a rectangle from (Xstart, Ystart) to (Xend, Yend), you can configure the color, width, and style.

void Paint_DrawRectangle(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, UWORD Color, DOT_PIXEL Line_width, DRAW_FILL Draw_Fill)
Parameter:
 	Xstart: Xstart of the rectangle.
 	Ystart: Ystart of the rectangle.
 	Xend: Xend of the rectangle.
 	Yend: Yend of the rectangle.
 	Color: The color of the rectangle
 	Line_width: The width of the edges. 8 sizes are available.
 	 	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: Style of the rectangle, empty or filled.
 	 	typedef enum {
 	 	 	 DRAW_FILL_EMPTY = 0,
 	 	 	 DRAW_FILL_FULL,
 	 	} DRAW_FILL;

Draw circle: Draw a circle in the image buffer, using (X_Center Y_Center) as the center and Radius as the radius. You can configure the color, width of the line, and the style of the circle.

void Paint_DrawCircle(UWORD X_Center, UWORD Y_Center, UWORD Radius, UWORD Color, DOT_PIXEL Line_width, DRAW_FILL Draw_Fill)
Parameter:
 	X_Center: X-axis of center
 	Y_Center: Y-axis of center
 	Radius： radius of circle
 	Color: The color of the circle
 	Line_width: The width of the arc, 8 sizes are available.
 	 	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: Style of the circle: empty or filled.
 	 	typedef enum {
 	 	 	 DRAW_FILL_EMPTY = 0,
 	 	 	 DRAW_FILL_FULL,
 	 	} DRAW_FILL;

Show Ascii character: Show a character in (Xstart, Ystart) position, you can configure the font, foreground, and background.

void Paint_DrawChar(UWORD Xstart, UWORD Ystart, const char Ascii_Char, sFONT* Font, UWORD Color_Foreground, UWORD Color_Background)
Parameter:
 	Xstart: Xstart of the character
 	Ystart: Ystart of the character
 	Ascii_Char: Ascii char
 	Font: five fonts are available：
 	 	font8：5*8
 	 	font12：7*12
 	 	font16：11*16
 	 	font20：14*20
 	 	font24：17*24
 	Color_Foreground: foreground color
 	Color_Background: background color

Draw string: Draw string at (Xstart Ystart), you can configure the fonts, foreground, and the background

void Paint_DrawString_EN(UWORD Xstart, UWORD Ystart, const char * pString, sFONT* Font, UWORD Color_Foreground, UWORD Color_Background)
Parameter:
 	Xstart: Xstart of the string
 	Ystart: Ystart of the string
 	pString：String
 	Font: five fonts are available：
 	 	font8：5*8
 	 	font12：7*12
 	 	font16：11*16
 	 	font20：14*20
 	 	font24：17*24的
 	Color_Foreground: foreground color
 	Color_Background: background color

Draw Chinese string: Draw Chinese string at (Xstart Ystart) of image buffer. You can configure fonts (GB2312), foreground, and the background.

void Paint_DrawString_CN(UWORD Xstart, UWORD Ystart, const char * pString, cFONT* font, UWORD Color_Foreground, UWORD Color_Background)
Parameter:
 	Xstart: Xstart of string
 	Ystart: Ystart of string
 	pString: string
 	Font: GB2312 fonts, two fonts are available                                                                                 ：
 	 	font12CN：ascii 11*21，Chinese 16*21
 	 	font24CN：ascii 24*41，Chinese 32*41
 	Color_Foreground: Foreground color
 	Color_Background: Background color

Draw number: In the image buffer, at (Xstart Ystart) as the left vertex, write a string of numbers, you can choose the Ascii font, font foreground color, or font background color.

void Paint_DrawNum(UWORD Xpoint, UWORD Ypoint, double Nummber, sFONT* Font, UWORD Digit,UWORD Color_Foreground, UWORD Color_Background);
Parameter:
 	Xstart: Left vertex X coordinate
 	Ystart: Left vertex Y coordinate
 	Nummber： The displayed number is stored in a 32-bit int type, which can be displayed up to 2147483647.
 	 	font8：5*8
 	 	font12：7*12
 	 	font16：11*16
 	 	font20：14*20
 	 	font24：17*24
        Digit: Display decimal places
 	Color_Foreground: Foreground color
 	Color_Background: Background color

Display time: Display time at (Xstart Ystart) of the image buffer, you can configure fonts, foreground, and background.

void Paint_DrawTime(UWORD Xstart, UWORD Ystart, PAINT_TIME *pTime, sFONT* Font, UWORD Color_Background, UWORD Color_Foreground)
Parameter:
 	Xstart: Xstart of time
 	Ystart: Ystart of time
 	pTime: Structure of time
 	Font: Ascii font, five fonts are available
 	 	font8：5*8
 	 	font12：7*12
 	 	font16：11*16
 	 	font20：14*20
 	 	font24：17*24
 	Color_Foreground: Foreground
 	Color_Background: Background

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