Lib for the new LCD Display with ILI9341 controller Modified for huge fonts (>255 bytes/char). Needs modified font.h files with 2-byte size parameter. Window size is set on a per-character basis to minimise the number of pixels written (speed-up, plus better detection of whether one last character will fit on the current line). NUCLEO & NXP DMA-enabled versions are modified but untested.
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SPI_TFT_ILI9341 Class Reference
Display control class, based on GraphicsDisplay and TextDisplay. More...
#include <SPI_TFT_ILI9341.h>
Inherits GraphicsDisplay.
Public Member Functions | |
SPI_TFT_ILI9341 (PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset, PinName dc, const char *name="TFT") | |
Create a SPI_TFT object connected to SPI and three pins. | |
virtual int | width () |
Get the width of the screen in pixel. | |
virtual int | height () |
Get the height of the screen in pixel. | |
virtual void | pixel (int x, int y, int colour) |
Draw a pixel at x,y with color. | |
void | circle (int x, int y, int r, int colour) |
draw a circle | |
void | fillcircle (int x, int y, int r, int colour) |
draw a filled circle | |
void | line (int x0, int y0, int x1, int y1, int colour) |
draw a 1 pixel line | |
void | rect (int x0, int y0, int x1, int y1, int colour) |
draw a rect | |
void | fillrect (int x0, int y0, int x1, int y1, int colour) |
draw a filled rect | |
virtual void | locate (int x, int y) |
setup cursor position | |
virtual void | cls (void) |
Fill the screen with _backgroun color. | |
virtual int | columns (void) |
calculate the max number of char in a line | |
virtual int | rows (void) |
calculate the max number of columns | |
virtual int | _putc (int value) |
put a char on the screen | |
virtual void | character (int x, int y, int c) |
draw a character on given position out of the active font to the TFT | |
void | Bitmap (unsigned int x, unsigned int y, unsigned int w, unsigned int h, unsigned char *bitmap) |
paint a bitmap on the TFT | |
int | BMP_16 (unsigned int x, unsigned int y, const char *Name_BMP) |
paint a 16 bit BMP from filesytem on the TFT (slow) | |
void | set_font (unsigned char *f) |
select the font to use | |
void | set_orientation (unsigned int o) |
Set the orientation of the screen x,y: 0,0 is always top left. | |
int | Read_ID (void) |
read out the manufacturer ID of the LCD can used for checking the connection to the display | |
virtual bool | claim (FILE *stream) |
redirect output from a stream (stoud, sterr) to display | |
Protected Member Functions | |
void | WindowMax (void) |
Set draw window region to whole screen. | |
void | hline (int x0, int x1, int y, int colour) |
draw a horizontal line | |
void | vline (int y0, int y1, int x, int colour) |
draw a vertical line | |
virtual void | window (unsigned int x, unsigned int y, unsigned int w, unsigned int h) |
Set draw window region. | |
void | tft_reset () |
Init the ILI9341 controller. | |
void | wr_dat (unsigned char value) |
Write data to the LCD controller. | |
void | wr_cmd (unsigned char value) |
Write a command the LCD controller. | |
char | rd_byte (unsigned char cmd) |
Start data sequence to the LCD controller. | |
virtual void | f_write (int data) |
Write a value to the to a LCD register. |
Detailed Description
Display control class, based on GraphicsDisplay and TextDisplay.
Example:
#include "stdio.h" #include "mbed.h" #include "SPI_TFT_ILI9341.h" #include "string" #include "Arial12x12.h" #include "Arial24x23.h" // the TFT is connected to SPI pin 5-7 and IO's 8-10 SPI_TFT_ILI9341 TFT(p5, p6, p7, p8, p9, p10,"TFT"); // mosi, miso, sclk, cs, reset, dc If your display need a signal for switch the backlight use a aditional IO pin in your program int main() { TFT.claim(stdout); // send stdout to the TFT display //TFT.claim(stderr); // send stderr to the TFT display TFT.background(Black); // set background to black TFT.foreground(White); // set chars to white TFT.cls(); // clear the screen TFT.set_font((unsigned char*) Arial12x12); // select the font TFT.set_orientation(0); printf(" Hello Mbed 0"); TFT.set_font((unsigned char*) Arial24x23); // select font 2 TFT.locate(48,115); TFT.printf("Bigger Font"); }
Definition at line 80 of file SPI_TFT_ILI9341.h.
Constructor & Destructor Documentation
SPI_TFT_ILI9341 | ( | PinName | mosi, |
PinName | miso, | ||
PinName | sclk, | ||
PinName | cs, | ||
PinName | reset, | ||
PinName | dc, | ||
const char * | name = "TFT" |
||
) |
Create a SPI_TFT object connected to SPI and three pins.
- Parameters:
-
mosi pin connected to SDO of display miso pin connected to SDI of display sclk pin connected to RS of display cs pin connected to CS of display reset pin connected to RESET of display dc pin connected to WR of display the IM pins have to be set to 1110 (3-0)
Definition at line 35 of file SPI_TFT_ILI9341.cpp.
Member Function Documentation
int _putc | ( | int | value ) | [virtual] |
put a char on the screen
- Parameters:
-
value char to print
- Returns:
- printed char
Definition at line 590 of file SPI_TFT_ILI9341.cpp.
void Bitmap | ( | unsigned int | x, |
unsigned int | y, | ||
unsigned int | w, | ||
unsigned int | h, | ||
unsigned char * | bitmap | ||
) |
paint a bitmap on the TFT
- Parameters:
-
x,y : upper left corner w width of bitmap h high of bitmap *bitmap pointer to the bitmap data
bitmap format: 16 bit R5 G6 B5
use Gimp to create / load , save as BMP, option 16 bit R5 G6 B5 use winhex to load this file and mark data stating at offset 0x46 to end use edit -> copy block -> C Source to export C array paste this array into your program
define the array as static const unsigned char to put it into flash memory cast the pointer to (unsigned char *) : tft.Bitmap(10,40,309,50,(unsigned char *)scala);
Definition at line 674 of file SPI_TFT_ILI9341.cpp.
int BMP_16 | ( | unsigned int | x, |
unsigned int | y, | ||
const char * | Name_BMP | ||
) |
paint a 16 bit BMP from filesytem on the TFT (slow)
- Parameters:
-
x,y : position of upper left corner *Name_BMP name of the BMP file with drive: "/local/test.bmp"
- Returns:
- 1 if bmp file was found and painted
- 0 if bmp file was found not found
- -1 if file is no bmp
- -2 if bmp file is no 16 bit bmp
- -3 if bmp file is to big for screen
- -4 if buffer malloc go wrong
bitmap format: 16 bit R5 G6 B5
use Gimp to create / load , save as BMP, option 16 bit R5 G6 B5 copy to internal file system or SD card
Definition at line 721 of file SPI_TFT_ILI9341.cpp.
void character | ( | int | x, |
int | y, | ||
int | c | ||
) | [virtual] |
draw a character on given position out of the active font to the TFT
- Parameters:
-
x x-position of char (top left) y y-position c char to print
Definition at line 605 of file SPI_TFT_ILI9341.cpp.
void circle | ( | int | x, |
int | y, | ||
int | r, | ||
int | colour | ||
) |
draw a circle
- Parameters:
-
x0,y0 center r radius color 16 bit color *
Definition at line 365 of file SPI_TFT_ILI9341.cpp.
bool claim | ( | FILE * | stream ) | [virtual, inherited] |
redirect output from a stream (stoud, sterr) to display
- Parameters:
-
stream stream that shall be redirected to the TextDisplay
Definition at line 65 of file TextDisplay.cpp.
void cls | ( | void | ) | [virtual] |
Fill the screen with _backgroun color.
Definition at line 358 of file SPI_TFT_ILI9341.cpp.
int columns | ( | void | ) | [virtual] |
calculate the max number of char in a line
- Returns:
- max columns depends on actual font size
Definition at line 576 of file SPI_TFT_ILI9341.cpp.
void f_write | ( | int | data ) | [protected, virtual] |
Write a value to the to a LCD register.
- Parameters:
-
reg register to be written val data to be written Read a LCD register reg register to be read
- Returns:
- value of the register fast SPI write function for optimized versions
- Parameters:
-
data data written to SPI
Definition at line 72 of file SPI_TFT_ILI9341_NUCLEO.cpp.
void fillcircle | ( | int | x, |
int | y, | ||
int | r, | ||
int | colour | ||
) |
draw a filled circle
- Parameters:
-
x0,y0 center r radius color 16 bit color *
Definition at line 384 of file SPI_TFT_ILI9341.cpp.
void fillrect | ( | int | x0, |
int | y0, | ||
int | x1, | ||
int | y1, | ||
int | colour | ||
) |
draw a filled rect
- Parameters:
-
x0,y0 top left corner x1,y1 down right corner color 16 bit color
Definition at line 542 of file SPI_TFT_ILI9341.cpp.
int height | ( | ) | [virtual] |
Get the height of the screen in pixel.
- Returns:
- height of screen in pixel
Definition at line 53 of file SPI_TFT_ILI9341.cpp.
void hline | ( | int | x0, |
int | x1, | ||
int | y, | ||
int | colour | ||
) | [protected] |
draw a horizontal line
- Parameters:
-
x0 horizontal start x1 horizontal stop y vertical position color 16 bit color
Definition at line 400 of file SPI_TFT_ILI9341.cpp.
void line | ( | int | x0, |
int | y0, | ||
int | x1, | ||
int | y1, | ||
int | colour | ||
) |
draw a 1 pixel line
- Parameters:
-
x0,y0 start point x1,y1 stop point color 16 bit color
Definition at line 450 of file SPI_TFT_ILI9341.cpp.
void locate | ( | int | x, |
int | y | ||
) | [virtual] |
setup cursor position
- Parameters:
-
x x-position (top left) y y-position
Definition at line 568 of file SPI_TFT_ILI9341.cpp.
void pixel | ( | int | x, |
int | y, | ||
int | colour | ||
) | [virtual] |
Draw a pixel at x,y with color.
- Parameters:
-
x horizontal position y vertical position color 16 bit pixel color
Definition at line 310 of file SPI_TFT_ILI9341.cpp.
char rd_byte | ( | unsigned char | cmd ) | [protected] |
Start data sequence to the LCD controller.
Stop of data writing to the LCD controller write data to the LCD controller
- Parameters:
-
data to be written * Read byte from the LCD controller cmd comand to controller
- Returns:
- data from LCD controller
Definition at line 104 of file SPI_TFT_ILI9341.cpp.
int Read_ID | ( | void | ) |
read out the manufacturer ID of the LCD can used for checking the connection to the display
- Returns:
- ID
Definition at line 141 of file SPI_TFT_ILI9341.cpp.
void rect | ( | int | x0, |
int | y0, | ||
int | x1, | ||
int | y1, | ||
int | colour | ||
) |
draw a rect
- Parameters:
-
x0,y0 top left corner x1,y1 down right corner color 16 bit color *
Definition at line 522 of file SPI_TFT_ILI9341.cpp.
int rows | ( | void | ) | [virtual] |
calculate the max number of columns
- Returns:
- max column depends on actual font size
Definition at line 583 of file SPI_TFT_ILI9341.cpp.
void set_font | ( | unsigned char * | f ) |
select the font to use
- Parameters:
-
f pointer to font array
font array can created with GLCD Font Creator from http://www.mikroe.com you have to add 4 parameter at the beginning of the font array to use:
- the number of byte / char
- the vertial size in pixel
- the horizontal size in pixel
- the number of byte per vertical line you also have to change the array to char[]
Definition at line 667 of file SPI_TFT_ILI9341.cpp.
void set_orientation | ( | unsigned int | o ) |
Set the orientation of the screen x,y: 0,0 is always top left.
- Parameters:
-
o direction to use the screen (0-3)
Definition at line 60 of file SPI_TFT_ILI9341.cpp.
void tft_reset | ( | ) | [protected] |
Init the ILI9341 controller.
Definition at line 153 of file SPI_TFT_ILI9341.cpp.
void vline | ( | int | y0, |
int | y1, | ||
int | x, | ||
int | colour | ||
) | [protected] |
draw a vertical line
- Parameters:
-
x horizontal position y0 vertical start y1 vertical stop color 16 bit color
Definition at line 425 of file SPI_TFT_ILI9341.cpp.
int width | ( | ) | [virtual] |
Get the width of the screen in pixel.
- Returns:
- width of screen in pixel
Definition at line 46 of file SPI_TFT_ILI9341.cpp.
void window | ( | unsigned int | x, |
unsigned int | y, | ||
unsigned int | w, | ||
unsigned int | h | ||
) | [protected, virtual] |
Set draw window region.
- Parameters:
-
x horizontal position y vertical position w window width in pixel h window height in pixels
Definition at line 333 of file SPI_TFT_ILI9341.cpp.
void WindowMax | ( | void | ) | [protected] |
Set draw window region to whole screen.
Definition at line 351 of file SPI_TFT_ILI9341.cpp.
void wr_cmd | ( | unsigned char | value ) | [protected] |
Write a command the LCD controller.
- Parameters:
-
cmd,: command to be written
Definition at line 85 of file SPI_TFT_ILI9341.cpp.
void wr_dat | ( | unsigned char | value ) | [protected] |
Write data to the LCD controller.
- Parameters:
-
dat data written to LCD controller
Definition at line 95 of file SPI_TFT_ILI9341.cpp.
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