#include <math.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cascoda-bm/cascoda_evbme.h"
#include "cascoda-bm/cascoda_interface.h"
#include "cascoda-util/cascoda_tasklet.h"
#include "gfx_driver.h"
#include "gfx_library.h"

Include dependency graph for gfx_library.c:

Macros
#define	min(a, b) (((a) < (b)) ? (a) : (b))

#define	_swap_int16_t(a, b)

Functions
void	display_drawCircleHelper (uint16_t x0, uint16_t y0, uint16_t r, uint8_t cornername, uint16_t color)
	Quarter-circle drawer, used to do circles and roundrects. More...

void	display_fillCircleHelper (uint16_t x0, uint16_t y0, uint16_t r, uint8_t corners, uint16_t delta, uint16_t color)
	Quarter-circle drawer with fill, used for circles and roundrects. More...

void	writeLine (uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t color)
	Write a line. More...

uint8_t	printNumber (uint32_t n, int8_t n_width, uint8_t _flags)

void	printFloat (float float_n, int8_t f_width, int8_t decimal, uint8_t _flags)

void	v_printf (const char *fmt, va_list arp)

void	fillRect (uint16_t x0, uint16_t y0, uint16_t x1, int16_t y1, uint16_t color)

void	display_drawPixel (int16_t x, int16_t y, uint16_t color)

void	display_clear (void)
	clears the frame buffer intializes the background on white. More...

void	display_setRotation (uint16_t rotation)
	set the rotation prints starting at the cursor position. More...

void	display_fillRect (uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color)
	draw filled rectangle More...

void	display_drawHLine (uint16_t x0, uint16_t y0, uint16_t x1, uint16_t color)

void	display_drawVLine (uint16_t x0, uint16_t y0, uint16_t y1, uint16_t color)

void	display_drawLine (uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t color)
	Draw a line. More...

void	display_drawCircle (uint16_t x0, uint16_t y0, uint16_t r, uint16_t color)
	Draw a circle outline. More...

void	display_fillCircle (uint16_t x0, uint16_t y0, uint16_t r, uint16_t color)
	Draw a circle with filled color. More...

void	display_drawRect (uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color)
	Draw a rectangle with no fill color. More...

void	display_drawRoundRect (uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t r, uint16_t color)
	Draw a rounded rectangle with no fill color. More...

void	display_fillRoundRect (uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t r, uint16_t color)
	Draw a rounded rectangle with fill color. More...

void	display_drawTriangle (uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color)
	Draw a triangle with no fill color. More...

void	display_fillTriangle (uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color)
	Draw a triangle with color-fill. More...

void	display_putc (uint8_t c)
	Print one byte/character of data. More...

void	display_puts (const uint8_t *s)
	Print a string to the display. More...

void	display_puts_max_n (const uint8_t *s, uint8_t n)
	Print a maximum of (n - 1) characters from the input string to the display and put "..." as the nth character afterwards to indicate that the string was truncated. More...

void	display_customChar (const uint8_t *c)

void	display_drawChar (uint16_t x, uint16_t y, uint8_t c, uint16_t color, uint16_t bg, uint8_t size)
	Draw a single character. More...

void	display_setCursor (uint16_t x, uint16_t y)
	Set text cursor location. More...

uint16_t	display_getCursorX (void)
	Get text cursor X location. More...

uint16_t	display_getCursorY (void)
	Get text cursor Y location. More...

void	display_setTextSize (uint8_t s)
	Set text 'magnification' size. More...

void	display_setTextColor (uint16_t c, uint16_t b)
	Set text font color with custom background color. More...

void	display_setTextWrap (bool w)
	Whether text that is too long should 'wrap' around to the next line. More...

uint8_t	display_getRotation (void)
	Get rotation setting for display. More...

uint16_t	display_getWidth (void)
	Get width of the display, accounting for the current rotation. More...

uint16_t	display_getHeight (void)
	Get height of the display, accounting for the current rotation. More...

uint16_t	display_color565 (uint8_t red, uint8_t green, uint8_t blue)
	Given 8-bit red, green and blue values, return a 'packed' 16-bit color value in '565' RGB format (5 bits red, 6 bits green, 5 bits blue). More...

void	display_drawBitmapV1 (uint16_t x, uint16_t y, const uint8_t *bitmap, uint16_t w, uint16_t h, uint16_t color)
	Draw a ROM-resident 1-bit image at the specified (x,y) position, using the specified foreground color (unset bits are transparent). More...

void	display_drawBitmapV1_bg (uint16_t x, uint16_t y, const uint8_t *bitmap, uint16_t w, uint16_t h, uint16_t color, uint16_t bg)
	Draw a ROM-resident 1-bit image at the specified (x,y) position, using the specified foreground (for set bits) and background (unset bits) colors. More...

void	display_drawBitmapV2 (uint16_t x, uint16_t y, const uint8_t *bitmap, uint16_t w, uint16_t h, uint16_t color)
	Draw a ROM-resident 1-bit image at the specified (x,y) position, using the specified foreground color (unset bits are transparent). More...

void	display_drawBitmapV2_bg (uint16_t x, uint16_t y, const uint8_t *bitmap, uint16_t w, uint16_t h, uint16_t color, uint16_t bg)
	Draw a ROM-resident 1-bit image at the specified (x,y) position, using the specified foreground (for set bits) and background (unset bits) colors. More...

void	display_double (char *text, int text_size, double v, int decimalDigits)
	convert a float to a string More...

void	display_slider (int x, int y, int length, int value)

void	display_progressbar (int x, int y, int length, int value)

Macro Definition Documentation

◆ _swap_int16_t

#define _swap_int16_t	(	a,
		b
	)

Value:

    {                       \
        int16_t t = a;      \
        a         = b;      \
        b         = t;      \
    }

◆ min

#define min	(	a,
		b
	)	(((a) < (b)) ? (a) : (b))

Function Documentation

◆ display_clear()

void display_clear ( void )

clears the frame buffer intializes the background on white.

◆ display_color565()

uint16_t display_color565	(	uint8_t	red,
		uint8_t	green,
		uint8_t	blue
	)

Given 8-bit red, green and blue values, return a 'packed' 16-bit color value in '565' RGB format (5 bits red, 6 bits green, 5 bits blue).

This is just a mathematical operation, no hardware is touched.

Parameters

red	8-bit red brightnesss (0 = off, 255 = max).
green	8-bit green brightnesss (0 = off, 255 = max).
blue	8-bit blue brightnesss (0 = off, 255 = max).

Returns: 'Packed' 16-bit color value (565 format).

◆ display_customChar()

void display_customChar ( const uint8_t * c )

◆ display_double()

void display_double	(	char *	text,
		int	text_size,
		double	v,
		int	decimalDigits
	)

convert a float to a string

Parameters

text	the text buffer to write in
text_size	the size of the text buffer
v	the floating number to display
decimalDigits	the decimal digit to display

◆ display_drawBitmapV1()

void display_drawBitmapV1	(	uint16_t	x,
		uint16_t	y,
		const uint8_t *	bitmap,
		uint16_t	w,
		uint16_t	h,
		uint16_t	color
	)

Draw a ROM-resident 1-bit image at the specified (x,y) position, using the specified foreground color (unset bits are transparent).

Parameters

x	Top left corner x coordinate
y	Top left corner y coordinate
bitmap	byte array with monochrome bitmap
w	Width of bitmap in pixels
h	Hieght of bitmap in pixels
color	16-bit 5-6-5 Color to draw with

◆ display_drawBitmapV1_bg()

void display_drawBitmapV1_bg	(	uint16_t	x,
		uint16_t	y,
		const uint8_t *	bitmap,
		uint16_t	w,
		uint16_t	h,
		uint16_t	color,
		uint16_t	bg
	)

Draw a ROM-resident 1-bit image at the specified (x,y) position, using the specified foreground (for set bits) and background (unset bits) colors.

Parameters

x	Top left corner x coordinate
y	Top left corner y coordinate
bitmap	byte array with monochrome bitmap
w	Width of bitmap in pixels
h	Hieght of bitmap in pixels
color	16-bit 5-6-5 Color to draw pixels with
bg	16-bit 5-6-5 Color to draw background with

◆ display_drawBitmapV2()

void display_drawBitmapV2	(	uint16_t	x,
		uint16_t	y,
		const uint8_t *	bitmap,
		uint16_t	w,
		uint16_t	h,
		uint16_t	color
	)

Draw a ROM-resident 1-bit image at the specified (x,y) position, using the specified foreground color (unset bits are transparent).

Parameters

x	Top left corner x coordinate
y	Top left corner y coordinate
bitmap	byte array with monochrome bitmap
w	Width of bitmap in pixels
h	Hieght of bitmap in pixels
color	16-bit 5-6-5 Color to draw pixels with

◆ display_drawBitmapV2_bg()

void display_drawBitmapV2_bg	(	uint16_t	x,
		uint16_t	y,
		const uint8_t *	bitmap,
		uint16_t	w,
		uint16_t	h,
		uint16_t	color,
		uint16_t	bg
	)

Draw a ROM-resident 1-bit image at the specified (x,y) position, using the specified foreground (for set bits) and background (unset bits) colors.

Parameters

x	Top left corner x coordinate
y	Top left corner y coordinate
bitmap	byte array with monochrome bitmap
w	Width of bitmap in pixels
h	Hieght of bitmap in pixels
color	16-bit 5-6-5 Color to draw pixels with
bg	16-bit 5-6-5 Color to draw background with

◆ display_drawChar()

void display_drawChar	(	uint16_t	x,
		uint16_t	y,
		uint8_t	c,
		uint16_t	color,
		uint16_t	bg,
		uint8_t	size
	)

Draw a single character.

Parameters

x	Bottom left corner x coordinate
y	Bottom left corner y coordinate
c	The 8-bit font-indexed character (likely ascii)
color	16-bit 5-6-5 Color to draw chraracter with
bg	16-bit 5-6-5 Color to fill background with (if same as color, no background)
size	Font magnification level, 1 is 'original' size

◆ display_drawCircle()

void display_drawCircle	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	r,
		uint16_t	color
	)

Draw a circle outline.

draw circle

Parameters

x0	Center-point x coordinate
y0	Center-point y coordinate
r	Radius of circle
color	16-bit 5-6-5 Color to draw with

◆ display_drawCircleHelper()

void display_drawCircleHelper	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	r,
		uint8_t	cornername,
		uint16_t	color
	)

Quarter-circle drawer, used to do circles and roundrects.

Parameters

x0	Center-point x coordinate
y0	Center-point y coordinate
r	Radius of circle
cornername	Mask bit #1 or bit #2 to indicate which quarters of the circle we're doing
color	16-bit 5-6-5 Color to draw with

◆ display_drawHLine()

void display_drawHLine	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	x1,
		uint16_t	color
	)

◆ display_drawLine()

void display_drawLine	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	x1,
		uint16_t	y1,
		uint16_t	color
	)

Draw a line.

draw line

Parameters

x0	Start point x coordinate
y0	Start point y coordinate
x1	End point x coordinate
y1	End point y coordinate
color	16-bit 5-6-5 Color to draw with

◆ display_drawPixel()

void display_drawPixel	(	int16_t	x,
		int16_t	y,
		uint16_t	color
	)

◆ display_drawRect()

void display_drawRect	(	uint16_t	x,
		uint16_t	y,
		uint16_t	w,
		uint16_t	h,
		uint16_t	color
	)

Draw a rectangle with no fill color.

draw rectangle

Parameters

x	Top left corner x coordinate
y	Top left corner y coordinate
w	Width in pixels
h	Height in pixels
color	16-bit 5-6-5 Color to draw with

◆ display_drawRoundRect()

void display_drawRoundRect	(	uint16_t	x,
		uint16_t	y,
		uint16_t	w,
		uint16_t	h,
		uint16_t	r,
		uint16_t	color
	)

Draw a rounded rectangle with no fill color.

Parameters

x	Top left corner x coordinate
y	Top left corner y coordinate
w	Width in pixels
h	Height in pixels
r	Radius of corner rounding
color	16-bit 5-6-5 Color to draw with

◆ display_drawTriangle()

void display_drawTriangle	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	x1,
		uint16_t	y1,
		uint16_t	x2,
		uint16_t	y2,
		uint16_t	color
	)

Draw a triangle with no fill color.

Parameters

x0	Vertex #0 x coordinate
y0	Vertex #0 y coordinate
x1	Vertex #1 x coordinate
y1	Vertex #1 y coordinate
x2	Vertex #2 x coordinate
y2	Vertex #2 y coordinate
color	16-bit 5-6-5 Color to draw with

◆ display_drawVLine()

void display_drawVLine	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	y1,
		uint16_t	color
	)

◆ display_fillCircle()

void display_fillCircle	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	r,
		uint16_t	color
	)

Draw a circle with filled color.

draw a filled circle

Parameters

x0	Center-point x coordinate
y0	Center-point y coordinate
r	Radius of circle
color	16-bit 5-6-5 Color to fill with

◆ display_fillCircleHelper()

void display_fillCircleHelper	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	r,
		uint8_t	corners,
		uint16_t	delta,
		uint16_t	color
	)

Quarter-circle drawer with fill, used for circles and roundrects.

Parameters

x0	Center-point x coordinate
y0	Center-point y coordinate
r	Radius of circle
corners	Mask bits indicating which quarters we're doing
delta	Offset from center-point, used for round-rects
color	16-bit 5-6-5 Color to fill with

◆ display_fillRect()

void display_fillRect	(	uint16_t	x,
		uint16_t	y,
		uint16_t	w,
		uint16_t	h,
		uint16_t	color
	)

draw filled rectangle

draws a filled rectangle

Parameters

x0	the x coordinate
y0	the y coordinate
w	the width of the rectangle
h	the height of the rectangle
color	the color of the line (BLACK or WHITE)

◆ display_fillRoundRect()

void display_fillRoundRect	(	uint16_t	x,
		uint16_t	y,
		uint16_t	w,
		uint16_t	h,
		uint16_t	r,
		uint16_t	color
	)

Draw a rounded rectangle with fill color.

Parameters

x	Top left corner x coordinate
y	Top left corner y coordinate
w	Width in pixels
h	Height in pixels
r	Radius of corner rounding
color	16-bit 5-6-5 Color to draw/fill with

◆ display_fillTriangle()

void display_fillTriangle	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	x1,
		uint16_t	y1,
		uint16_t	x2,
		uint16_t	y2,
		uint16_t	color
	)

Draw a triangle with color-fill.

Parameters

x0	Vertex #0 x coordinate
y0	Vertex #0 y coordinate
x1	Vertex #1 x coordinate
y1	Vertex #1 y coordinate
x2	Vertex #2 x coordinate
y2	Vertex #2 y coordinate
color	16-bit 5-6-5 Color to fill/draw with

◆ display_getCursorX()

uint16_t display_getCursorX ( void )

Get text cursor X location.

Returns: X coordinate in pixels

◆ display_getCursorY()

uint16_t display_getCursorY ( void )

Get text cursor Y location.

Returns: Y coordinate in pixels

◆ display_getHeight()

uint16_t display_getHeight ( void )

Get height of the display, accounting for the current rotation.

Get display Height.

Returns: Height in pixels

◆ display_getRotation()

uint8_t display_getRotation ( void )

Get rotation setting for display.

Returns: 0 thru 3 corresponding to 4 cardinal rotations

◆ display_getWidth()

uint16_t display_getWidth ( void )

Get width of the display, accounting for the current rotation.

Get display Width.

Returns: Width in pixels

◆ display_progressbar()

void display_progressbar	(	int	x,
		int	y,
		int	length,
		int	value
	)

◆ display_putc()

void display_putc ( uint8_t c )

Print one byte/character of data.

Parameters

c	The 8-bit ascii character to write

◆ display_puts()

void display_puts ( const uint8_t * s )

Print a string to the display.

Parameters

s	The string to write

note use snprintf to format text snprintf does not display floating numbers use display_double() to display floating numbers

◆ display_puts_max_n()

void display_puts_max_n	(	const uint8_t *	s,
		uint8_t	n
	)

Print a maximum of (n - 1) characters from the input string to the display and put "..." as the nth character afterwards to indicate that the string was truncated.

Parameters

s	The input string to write (will be truncated if longer than n characters)
n	The maximum number of characters (minus 1 to leave space for "...") to display from the input string NOTE: This is only the number of VISIBLE characters, so excludes NULL terminator.

note use snprintf to format text snprintf does not display floating numbers use display_double() to display floating numbers

EXAMPLE: const char *str = "Hello, World!"; display_puts_max_n(s, 30); // Result is: Hello, World! display_puts_max_n(s, 9); // Result is: Hello, W...

◆ display_setCursor()

void display_setCursor	(	uint16_t	x,
		uint16_t	y
	)

Set text cursor location.

Parameters

x	X coordinate in pixels
y	Y coordinate in pixels

◆ display_setRotation()

void display_setRotation ( uint16_t rotation )

set the rotation prints starting at the cursor position.

Parameters

rotation 0 == no rotation, 1 = 90 degrees

◆ display_setTextColor()

void display_setTextColor	(	uint16_t	c,
		uint16_t	b
	)

Set text font color with custom background color.

Parameters

c	16-bit 5-6-5 Color to draw text with
b	16-bit 5-6-5 Color to draw background/fill with

◆ display_setTextSize()

void display_setTextSize ( uint8_t s )

Set text 'magnification' size.

Each increase in s makes 1 pixel that much bigger.

Parameters

s	Desired text size. 1 is default 6x8, 2 is 12x16, 3 is 18x24, etc

◆ display_setTextWrap()

void display_setTextWrap ( bool w )

Whether text that is too long should 'wrap' around to the next line.

Parameters

w	Set true for wrapping, false for clipping

◆ display_slider()

void display_slider	(	int	x,
		int	y,
		int	length,
		int	value
	)

◆ fillRect()

void fillRect	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	x1,
		int16_t	y1,
		uint16_t	color
	)

◆ printFloat()

void printFloat	(	float	float_n,
		int8_t	f_width,
		int8_t	decimal,
		uint8_t	_flags
	)

◆ printNumber()

uint8_t printNumber	(	uint32_t	n,
		int8_t	n_width,
		uint8_t	_flags
	)

◆ v_printf()

void v_printf	(	const char *	fmt,
		va_list	arp
	)

◆ writeLine()

void writeLine	(	uint16_t	x0,
		uint16_t	y0,
		uint16_t	x1,
		uint16_t	y1,
		uint16_t	color
	)

Write a line.

Bresenham's algorithm - thx wikpedia

Parameters

x0	Start point x coordinate
y0	Start point y coordinate
x1	End point x coordinate
y1	End point y coordinate
color	16-bit 5-6-5 Color to draw with

Macros

Functions

Macro Definition Documentation

◆ _swap_int16_t

◆ min

Function Documentation

◆ display_clear()

◆ display_color565()

◆ display_customChar()

◆ display_double()

◆ display_drawBitmapV1()

◆ display_drawBitmapV1_bg()

◆ display_drawBitmapV2()

◆ display_drawBitmapV2_bg()

◆ display_drawChar()

◆ display_drawCircle()

◆ display_drawCircleHelper()

◆ display_drawHLine()

◆ display_drawLine()

◆ display_drawPixel()

◆ display_drawRect()

◆ display_drawRoundRect()

◆ display_drawTriangle()

◆ display_drawVLine()

◆ display_fillCircle()

◆ display_fillCircleHelper()

◆ display_fillRect()

◆ display_fillRoundRect()

◆ display_fillTriangle()

◆ display_getCursorX()

◆ display_getCursorY()

◆ display_getHeight()

◆ display_getRotation()

◆ display_getWidth()

◆ display_progressbar()

◆ display_putc()

◆ display_puts()

◆ display_puts_max_n()

◆ display_setCursor()

◆ display_setRotation()

◆ display_setTextColor()

◆ display_setTextSize()

◆ display_setTextWrap()

◆ display_slider()

◆ fillRect()

◆ printFloat()

◆ printNumber()

◆ v_printf()

◆ writeLine()