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Graphical LCD

Page history last edited by David S 9 years, 9 months ago

LIBRARY CODE

1) Download these two zip files: Adafruit_PCD8544.zip and Adafruit_GFX.zip. Open Arduino and use the Sketch > Import Library > Add Library menu to select and install each zip file (not the unzipped folders!). This will add a sketch under Examples > Adafruit_PCD8544 > pcdtest.

Note: If your computer automatically puts the zip files into the trash, copy them someplace else temporarily; the installer needs to use the zip file.

2) Create a folder ~\Arduino\Strings (on Windows) or ~/Documents/Arduino/Strings/ (on OSX) and move Strings.ino to it. This will add a sketch under Sketchbook > Strings.

3) Download and extract GraphicsExample.zip, and add the unzipped folder to ~\Arduino\ (on Windows) or ~/Documents/Arduino/ (on OSX). This will add a sketch under Sketchbook > GraphicsExample.

4) You'll likely have to restart Arduino to see the new sketches, so do that now.

Note: these steps have already been completed on the lab computer(s).

API

Basic Functions

Adafruit_PCD8544(int8_t SCLK, int8_t DIN, int8_t DC, int8_t CS, int8_t RST)	constructor
void begin(uint8_t contrast = 40);	initializes display and sets contrast to a default value
void setContrast(uint8_t val);	sets contrast of display
void display(); void clearDisplay(void);	pushes the buffer to the screen clears the screen and buffer
void drawPixel(int16_t x, int16_t y, uint16_t color);	draws a single pixel at (x,y) on display (color = BLACK for our purposes)
uint8_t getPixel(int8_t x, int8_t y);	returns "color" of pixel at (x,y)
invertDisplay(boolean i);	change display to white-on-black
void setCursor(int16_t x, int16_t y);	move cursor to pixel (x,y)
void setTextSize(uint8_t s);	sets the size of the text
void setTextWrap(boolean w);	defines wrapping for text
void setRotation(uint8_t r);	rotates display

Graphical Functions

void drawPixel(int16_t x, int16_t y, uint16_t color);	draws a single pixel at (x,y) on display (color = BLACK for our purposes)
uint8_t getPixel(int8_t x, int8_t y);	returns "color" of pixel at (x,y)
virtual void void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color);	draws a line from pixel (x0,y0) to (x1, y1)
virtual void drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color);	draws a vertical line from pixel (x,y) with length=h
virtual void drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color);	draws a horizontal line from pixel (x,y) with length=w
virtual void drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);	draws an empty rectangle with top left corner at (x,y), width=w, and height=h
virtual void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);	draws a filled rectangle with top left corner at (x,y), width=w, and height=h
virtual void fillScreen(uint16_t color);	fills the entire screen
void drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color);	draws an empty circle with center at (x0,y0) and radius=r
void fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color);	draws a filled circle with center at (x0,y0) and radius=r
void drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color);	draws an empty triangle with corners at (x0,y0), (x1,y1), and (x2,y2)
void fillTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color);	draws a filled triangle with corners at (x0,y0), (x1,y1), and (x2,y2)
void drawRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h, int16_t radius, uint16_t color);	draws an empty rectangle with rounded corners, top left corner at (x,y), width=w, and height=h
void fillRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h, int16_t radius, uint16_t color);	draws a filled rectangle with rounded corners, top left corner at (x,y), width=w, and height=h
void drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color);	draws file *bitmap with upper left corrner at (x,y) and size width=w and height=h