Craig Evans
Demo program for LCD and Joystick
Dependents: ELEC2645_Race_Collision
Diff: lib/N5110.h
- Revision:
- 0:be41a15e7a86
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/N5110.h Fri Dec 11 12:25:25 2020 +0000
@@ -0,0 +1,538 @@
+#ifndef N5110_H
+#define N5110_H
+
+#include "mbed.h"
+
+// number of pixels on display
+#define WIDTH 84
+#define HEIGHT 48
+#define BANKS 6
+
+/// Fill types for 2D shapes
+enum FillType {
+ FILL_TRANSPARENT, ///< Transparent with outline
+ FILL_BLACK, ///< Filled black
+ FILL_WHITE, ///< Filled white (no outline)
+};
+
+/** N5110 Class
+@brief Library for interfacing with Nokia 5110 LCD display (https://www.sparkfun.com/products/10168) using the hardware SPI on the mbed.
+@brief The display is powered from a GPIO pin meaning it can be controlled via software. The LED backlight is also software-controllable (via PWM pin).
+@brief Can print characters and strings to the display using the included 5x7 font.
+@brief The library also implements a screen buffer so that individual pixels on the display (84 x 48) can be set, cleared and read.
+@brief The library can print primitive shapes (lines, circles, rectangles)
+@brief Acknowledgements to Chris Yan's Nokia_5110 Library.
+
+@brief Revision 1.3
+
+@author Craig A. Evans
+@date 7th February 2017
+
+@code
+
+#include "mbed.h"
+#include "N5110.h"
+
+// rows,cols
+int sprite[8][5] = {
+ { 0,0,1,0,0 },
+ { 0,1,1,1,0 },
+ { 0,0,1,0,0 },
+ { 0,1,1,1,0 },
+ { 1,1,1,1,1 },
+ { 1,1,1,1,1 },
+ { 1,1,0,1,1 },
+ { 1,1,0,1,1 },
+};
+
+// VCC,SCE,RST,D/C,MOSI,SCLK,LED
+//N5110 lcd(p7,p8,p9,p10,p11,p13,p21); // LPC1768 - pwr from GPIO
+N5110 lcd(p8,p9,p10,p11,p13,p21); // LPC1768 - powered from +3V3 - JP1 in 2/3 position
+//N5110 lcd(PTC9,PTC0,PTC7,PTD2,PTD1,PTC11); // K64F - pwr from 3V3
+
+int main()
+{
+ // first need to initialise display
+ lcd.init();
+
+ // change set contrast in range 0.0 to 1.0
+ // 0.4 appears to be a good starting point
+ lcd.setContrast(0.4);
+
+ while(1) {
+
+ // these are default settings so not strictly needed
+ lcd.normalMode(); // normal colour mode
+
+ lcd.clear();
+ // x origin, y origin, rows, cols, sprite
+ lcd.drawSprite(20,6,8,5,(int *)sprite);
+ lcd.refresh();
+ wait(5.0);
+
+ lcd.clear(); // clear buffer at start of every loop
+ // can directly print strings at specified co-ordinates (must be less than 84 pixels to fit on display)
+ lcd.printString("Hello, World!",0,0);
+
+ char buffer[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
+ // so can display a string of a maximum 14 characters in length
+ // or create formatted strings - ensure they aren't more than 14 characters long
+ int temperature = 27;
+ int length = sprintf(buffer,"T = %2d C",temperature); // print formatted data to buffer
+ // it is important the format specifier ensures the length will fit in the buffer
+ if (length <= 14) // if string will fit on display (assuming printing at x=0)
+ lcd.printString(buffer,0,1); // display on screen
+
+ float pressure = 1012.3; // same idea with floats
+ length = sprintf(buffer,"P = %.2f mb",pressure);
+ if (length <= 14)
+ lcd.printString(buffer,0,2);
+
+ // can also print individual characters at specified place
+ lcd.printChar('X',5,3);
+
+ // draw a line across the display at y = 40 pixels (origin top-left)
+ for (int i = 0; i < WIDTH; i++) {
+ lcd.setPixel(i,40,true);
+ }
+ // need to refresh display after setting pixels or writing strings
+ lcd.refresh();
+ wait(5.0);
+
+ // can check status of pixel using getPixel(x,y);
+ lcd.clear(); // clear buffer
+ lcd.setPixel(2,2,true); // set random pixel in buffer
+ lcd.refresh();
+ wait(1.0);
+
+ int pixel_to_test = lcd.getPixel(2,2);
+
+ if ( pixel_to_test ) {
+ lcd.printString("2,2 is set",0,4);
+ }
+
+ // this one shouldn't be set
+ lcd.setPixel(3,3,false); // clear random pixel in buffer
+ lcd.refresh();
+ pixel_to_test = lcd.getPixel(3,3);
+
+ if ( pixel_to_test == 0 ) {
+ lcd.printString("3,3 is clear",0,5);
+ }
+
+ lcd.refresh();
+ wait(4.0);
+
+ lcd.clear(); // clear buffer
+ lcd.inverseMode(); // invert colours
+ lcd.setBrightness(1.0); // put LED backlight on full
+
+ float array[84];
+
+ for (int i = 0; i < 84; i++) {
+ array[i] = 0.5 + 0.5*sin(i*2*3.14/84);
+ }
+
+ // can also plot graphs - 84 elements only
+ // values must be in range 0.0 - 1.0
+ lcd.plotArray(array);
+ lcd.refresh();
+ wait(5.0);
+
+ lcd.clear();
+ lcd.normalMode(); // normal colour mode back
+ lcd.setBrightness(0.5); // put LED backlight on 50%
+
+ // example of drawing lines
+ for (int x = 0; x < WIDTH ; x+=10) {
+ // x0,y0,x1,y1,type 0-white,1-black,2-dotted
+ lcd.drawLine(0,0,x,HEIGHT,2);
+ }
+ lcd.refresh(); // refresh after drawing shapes
+ wait(5.0);
+
+
+ lcd.clear();
+ // example of how to draw circles
+ lcd.drawCircle(WIDTH/2,HEIGHT/2,20,FILL_BLACK); // x,y,radius,black fill
+ lcd.drawCircle(WIDTH/2,HEIGHT/2,10,FILL_WHITE); // x,y,radius,white fill
+ lcd.drawCircle(WIDTH/2,HEIGHT/2,30,FILL_TRANSPARENT); // x,y,radius,transparent with outline
+ lcd.refresh(); // refresh after drawing shapes
+ wait(5.0);
+
+ lcd.clear();
+ // example of how to draw rectangles
+ // origin x,y,width,height,type
+ lcd.drawRect(10,10,50,30,FILL_BLACK); // filled black rectangle
+ lcd.drawRect(15,15,20,10,FILL_WHITE); // filled white rectange (no outline)
+ lcd.drawRect(2,2,70,40,FILL_TRANSPARENT); // transparent, just outline
+ lcd.refresh(); // refresh after drawing shapes
+ wait(5.0);
+
+ }
+}
+
+
+@endcode
+*/
+class N5110
+{
+private:
+// objects
+ SPI *_spi;
+ DigitalOut *_led;
+ DigitalOut *_pwr;
+ DigitalOut *_sce;
+ DigitalOut *_rst;
+ DigitalOut *_dc;
+
+// variables
+ unsigned char buffer[84][6]; // screen buffer - the 6 is for the banks - each one is 8 bits;
+
+public:
+ /** Create a N5110 object connected to the specified pins
+ *
+ * @param pwr Pin connected to Vcc on the LCD display (pin 1)
+ * @param sce Pin connected to chip enable (pin 3)
+ * @param rst Pin connected to reset (pin 4)
+ * @param dc Pin connected to data/command select (pin 5)
+ * @param mosi Pin connected to data input (MOSI) (pin 6)
+ * @param sclk Pin connected to serial clock (SCLK) (pin 7)
+ * @param led Pin connected to LED backlight (must be PWM) (pin 8)
+ *
+ */
+ N5110(PinName const pwrPin,
+ PinName const scePin,
+ PinName const rstPin,
+ PinName const dcPin,
+ PinName const mosiPin,
+ PinName const sclkPin,
+ PinName const ledPin);
+
+ /** Create a N5110 object connected to the specified pins (Vcc to +3V3)
+ *
+ * @param sce Pin connected to chip enable (pin 3)
+ * @param rst Pin connected to reset (pin 4)
+ * @param dc Pin connected to data/command select (pin 5)
+ * @param mosi Pin connected to data input (MOSI) (pin 6)
+ * @param sclk Pin connected to serial clock (SCLK) (pin 7)
+ * @param led Pin connected to LED backlight (must be PWM) (pin 8)
+ *
+ */
+ N5110(PinName const scePin,
+ PinName const rstPin,
+ PinName const dcPin,
+ PinName const mosiPin,
+ PinName const sclkPin,
+ PinName const ledPin);
+
+ /**
+ * Free allocated memory when object goes out of scope
+ */
+ ~N5110();
+
+ /** Initialise display
+ *
+ * Powers up the display and turns on backlight (50% brightness default).
+ * Sets the display up in horizontal addressing mode and with normal video mode.
+ */
+ void init();
+
+ /** Turn off
+ *
+ * Powers down the display and turns of the backlight.
+ * Needs to be reinitialised before being re-used.
+ */
+ void turnOff();
+
+ /** Clear
+ *
+ * Clears the screen buffer.
+ */
+ void clear();
+
+ /** Set screen constrast
+ * @param constrast - float in range 0.0 to 1.0 (0.40 to 0.60 is usually a good value)
+ */
+ void setContrast(float contrast);
+
+ /** Turn on normal video mode (default)
+ * Black on white
+ */
+ void normalMode();
+
+ /** Turn on inverse video mode (default)
+ * White on black
+ */
+ void inverseMode();
+
+ /** Backlight On
+ *
+ * Turns backlight on
+ */
+ void backLightOn();
+
+ /** Set Brightness
+ *
+ * Turns backlight off
+ */
+ void backLightOff();
+
+ /** Print String
+ *
+ * Prints a string of characters to the screen buffer. String is cut-off after the 83rd pixel.
+ * @param x - the column number (0 to 83)
+ * @param y - the row number (0 to 5) - the display is split into 6 banks - each bank can be considered a row
+ */
+ void printString(char const *str,
+ unsigned int const x,
+ unsigned int const y);
+
+ /** Print Character
+ *
+ * Sends a character to the screen buffer. Printed at the specified location. Character is cut-off after the 83rd pixel.
+ * @param c - the character to print. Can print ASCII as so printChar('C').
+ * @param x - the column number (0 to 83)
+ * @param y - the row number (0 to 5) - the display is split into 6 banks - each bank can be considered a row
+ */
+ void printChar(char const c,
+ unsigned int const x,
+ unsigned int const y);
+
+ /**
+ * @brief Set a Pixel
+ *
+ * @param x The x co-ordinate of the pixel (0 to 83)
+ * @param y The y co-ordinate of the pixel (0 to 47)
+ * @param state The state of the pixel [true=black (default), false=white]
+ *
+ * @details This function sets the state of a pixel in the screen buffer.
+ * The third parameter can be omitted,
+ */
+ void setPixel(unsigned int const x,
+ unsigned int const y,
+ bool const state = true);
+
+ /**
+ * @brief Clear a Pixel
+ *
+ * @param x - the x co-ordinate of the pixel (0 to 83)
+ * @param y - the y co-ordinate of the pixel (0 to 47)
+ *
+ * @details This function clears pixel in the screen buffer
+ *
+ * @deprecated Use setPixel(x, y, false) instead
+ */
+ void clearPixel(unsigned int const x,
+ unsigned int const y)
+ __attribute__((deprecated("Use setPixel(x,y,false) instead")));
+
+ /** Get a Pixel
+ *
+ * This function gets the status of a pixel in the screen buffer.
+ * @param x - the x co-ordinate of the pixel (0 to 83)
+ * @param y - the y co-ordinate of the pixel (0 to 47)
+ * @returns
+ * 0 - pixel is clear
+ * 1 - pixel is set
+ */
+ int getPixel(unsigned int const x,
+ unsigned int const y) const;
+
+ /** Refresh display
+ *
+ * This functions sends the screen buffer to the display.
+ */
+ void refresh();
+
+ /** Randomise buffer
+ *
+ * This function fills the buffer with random data. Can be used to test the display.
+ * A call to refresh() must be made to update the display to reflect the change in pixels.
+ * The seed is not set and so the generated pattern will probably be the same each time.
+ * TODO: Randomise the seed - maybe using the noise on the AnalogIn pins.
+ */
+ void randomiseBuffer();
+
+ /** Plot Array
+ *
+ * This function plots a one-dimensional array in the buffer.
+ * @param array[] - y values of the plot. Values should be normalised in the range 0.0 to 1.0. First 84 plotted.
+ */
+ void plotArray(float const array[]);
+
+ /** Draw Circle
+ *
+ * This function draws a circle at the specified origin with specified radius in the screen buffer
+ * Uses the midpoint circle algorithm.
+ * @see http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
+ * @param x0 - x-coordinate of centre
+ * @param y0 - y-coordinate of centre
+ * @param radius - radius of circle in pixels
+ * @param fill - fill-type for the shape
+ */
+ void drawCircle(unsigned int const x0,
+ unsigned int const y0,
+ unsigned int const radius,
+ FillType const fill);
+
+ /** Draw Line
+ *
+ * This function draws a line between the specified points using linear interpolation.
+ * @param x0 - x-coordinate of first point
+ * @param y0 - y-coordinate of first point
+ * @param x1 - x-coordinate of last point
+ * @param y1 - y-coordinate of last point
+ * @param type - 0 white,1 black,2 dotted
+ */
+ void drawLine(unsigned int const x0,
+ unsigned int const y0,
+ unsigned int const x1,
+ unsigned int const y1,
+ unsigned int const type);
+
+ /** Draw Rectangle
+ *
+ * This function draws a rectangle.
+ * @param x0 - x-coordinate of origin (top-left)
+ * @param y0 - y-coordinate of origin (top-left)
+ * @param width - width of rectangle
+ * @param height - height of rectangle
+ * @param fill - fill-type for the shape
+ */
+ void drawRect(unsigned int const x0,
+ unsigned int const y0,
+ unsigned int const width,
+ unsigned int const height,
+ FillType const fill);
+
+ /** Draw Sprite
+ *
+ * This function draws a sprite as defined in a 2D array
+ * @param x0 - x-coordinate of origin (top-left)
+ * @param y0 - y-coordinate of origin (top-left)
+ * @param nrows - number of rows in sprite
+ * @param ncols - number of columns in sprite
+ * @param sprite - 2D array representing the sprite
+ */
+ void drawSprite(int x0,
+ int y0,
+ int nrows,
+ int ncols,
+ int *sprite);
+
+
+private:
+// methods
+ void setXYAddress(unsigned int const x,
+ unsigned int const y);
+ void initSPI();
+ void turnOn();
+ void reset();
+ void clearRAM();
+ void sendCommand(unsigned char command);
+ void sendData(unsigned char data);
+ void setTempCoefficient(char tc); // 0 to 3
+ void setBias(char bias); // 0 to 7
+};
+
+const unsigned char font5x7[480] = {
+ 0x00, 0x00, 0x00, 0x00, 0x00,// (space)
+ 0x00, 0x00, 0x5F, 0x00, 0x00,// !
+ 0x00, 0x07, 0x00, 0x07, 0x00,// "
+ 0x14, 0x7F, 0x14, 0x7F, 0x14,// #
+ 0x24, 0x2A, 0x7F, 0x2A, 0x12,// $
+ 0x23, 0x13, 0x08, 0x64, 0x62,// %
+ 0x36, 0x49, 0x55, 0x22, 0x50,// &
+ 0x00, 0x05, 0x03, 0x00, 0x00,// '
+ 0x00, 0x1C, 0x22, 0x41, 0x00,// (
+ 0x00, 0x41, 0x22, 0x1C, 0x00,// )
+ 0x08, 0x2A, 0x1C, 0x2A, 0x08,// *
+ 0x08, 0x08, 0x3E, 0x08, 0x08,// +
+ 0x00, 0x50, 0x30, 0x00, 0x00,// ,
+ 0x08, 0x08, 0x08, 0x08, 0x08,// -
+ 0x00, 0x60, 0x60, 0x00, 0x00,// .
+ 0x20, 0x10, 0x08, 0x04, 0x02,// /
+ 0x3E, 0x51, 0x49, 0x45, 0x3E,// 0
+ 0x00, 0x42, 0x7F, 0x40, 0x00,// 1
+ 0x42, 0x61, 0x51, 0x49, 0x46,// 2
+ 0x21, 0x41, 0x45, 0x4B, 0x31,// 3
+ 0x18, 0x14, 0x12, 0x7F, 0x10,// 4
+ 0x27, 0x45, 0x45, 0x45, 0x39,// 5
+ 0x3C, 0x4A, 0x49, 0x49, 0x30,// 6
+ 0x01, 0x71, 0x09, 0x05, 0x03,// 7
+ 0x36, 0x49, 0x49, 0x49, 0x36,// 8
+ 0x06, 0x49, 0x49, 0x29, 0x1E,// 9
+ 0x00, 0x36, 0x36, 0x00, 0x00,// :
+ 0x00, 0x56, 0x36, 0x00, 0x00,// ;
+ 0x00, 0x08, 0x14, 0x22, 0x41,// <
+ 0x14, 0x14, 0x14, 0x14, 0x14,// =
+ 0x41, 0x22, 0x14, 0x08, 0x00,// >
+ 0x02, 0x01, 0x51, 0x09, 0x06,// ?
+ 0x32, 0x49, 0x79, 0x41, 0x3E,// @
+ 0x7E, 0x11, 0x11, 0x11, 0x7E,// A
+ 0x7F, 0x49, 0x49, 0x49, 0x36,// B
+ 0x3E, 0x41, 0x41, 0x41, 0x22,// C
+ 0x7F, 0x41, 0x41, 0x22, 0x1C,// D
+ 0x7F, 0x49, 0x49, 0x49, 0x41,// E
+ 0x7F, 0x09, 0x09, 0x01, 0x01,// F
+ 0x3E, 0x41, 0x41, 0x51, 0x32,// G
+ 0x7F, 0x08, 0x08, 0x08, 0x7F,// H
+ 0x00, 0x41, 0x7F, 0x41, 0x00,// I
+ 0x20, 0x40, 0x41, 0x3F, 0x01,// J
+ 0x7F, 0x08, 0x14, 0x22, 0x41,// K
+ 0x7F, 0x40, 0x40, 0x40, 0x40,// L
+ 0x7F, 0x02, 0x04, 0x02, 0x7F,// M
+ 0x7F, 0x04, 0x08, 0x10, 0x7F,// N
+ 0x3E, 0x41, 0x41, 0x41, 0x3E,// O
+ 0x7F, 0x09, 0x09, 0x09, 0x06,// P
+ 0x3E, 0x41, 0x51, 0x21, 0x5E,// Q
+ 0x7F, 0x09, 0x19, 0x29, 0x46,// R
+ 0x46, 0x49, 0x49, 0x49, 0x31,// S
+ 0x01, 0x01, 0x7F, 0x01, 0x01,// T
+ 0x3F, 0x40, 0x40, 0x40, 0x3F,// U
+ 0x1F, 0x20, 0x40, 0x20, 0x1F,// V
+ 0x7F, 0x20, 0x18, 0x20, 0x7F,// W
+ 0x63, 0x14, 0x08, 0x14, 0x63,// X
+ 0x03, 0x04, 0x78, 0x04, 0x03,// Y
+ 0x61, 0x51, 0x49, 0x45, 0x43,// Z
+ 0x00, 0x00, 0x7F, 0x41, 0x41,// [
+ 0x02, 0x04, 0x08, 0x10, 0x20,// "\"
+ 0x41, 0x41, 0x7F, 0x00, 0x00,// ]
+ 0x04, 0x02, 0x01, 0x02, 0x04,// ^
+ 0x40, 0x40, 0x40, 0x40, 0x40,// _
+ 0x00, 0x01, 0x02, 0x04, 0x00,// `
+ 0x20, 0x54, 0x54, 0x54, 0x78,// a
+ 0x7F, 0x48, 0x44, 0x44, 0x38,// b
+ 0x38, 0x44, 0x44, 0x44, 0x20,// c
+ 0x38, 0x44, 0x44, 0x48, 0x7F,// d
+ 0x38, 0x54, 0x54, 0x54, 0x18,// e
+ 0x08, 0x7E, 0x09, 0x01, 0x02,// f
+ 0x08, 0x14, 0x54, 0x54, 0x3C,// g
+ 0x7F, 0x08, 0x04, 0x04, 0x78,// h
+ 0x00, 0x44, 0x7D, 0x40, 0x00,// i
+ 0x20, 0x40, 0x44, 0x3D, 0x00,// j
+ 0x00, 0x7F, 0x10, 0x28, 0x44,// k
+ 0x00, 0x41, 0x7F, 0x40, 0x00,// l
+ 0x7C, 0x04, 0x18, 0x04, 0x78,// m
+ 0x7C, 0x08, 0x04, 0x04, 0x78,// n
+ 0x38, 0x44, 0x44, 0x44, 0x38,// o
+ 0x7C, 0x14, 0x14, 0x14, 0x08,// p
+ 0x08, 0x14, 0x14, 0x18, 0x7C,// q
+ 0x7C, 0x08, 0x04, 0x04, 0x08,// r
+ 0x48, 0x54, 0x54, 0x54, 0x20,// s
+ 0x04, 0x3F, 0x44, 0x40, 0x20,// t
+ 0x3C, 0x40, 0x40, 0x20, 0x7C,// u
+ 0x1C, 0x20, 0x40, 0x20, 0x1C,// v
+ 0x3C, 0x40, 0x30, 0x40, 0x3C,// w
+ 0x44, 0x28, 0x10, 0x28, 0x44,// x
+ 0x0C, 0x50, 0x50, 0x50, 0x3C,// y
+ 0x44, 0x64, 0x54, 0x4C, 0x44,// z
+ 0x00, 0x08, 0x36, 0x41, 0x00,// {
+ 0x00, 0x00, 0x7F, 0x00, 0x00,// |
+ 0x00, 0x41, 0x36, 0x08, 0x00,// }
+ 0x08, 0x08, 0x2A, 0x1C, 0x08,// ->
+ 0x08, 0x1C, 0x2A, 0x08, 0x08 // <-
+};
+
+#endif
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