Jonne Valola / Mbed 2 deprecated SPI18TFT

1.8" ST7735 SPI TFT Starfield demo for the SPI ST7735 library http://mbed.org/users/smultron1977/libraries/ST7735_TFT/m20nw8

Dependencies:   mbed

main.cpp@0:309c546f048d, 2011-12-11 (annotated)

Committer:
smultron1977
Date:
Sun Dec 11 21:14:33 2011 +0000
Revision:
0:309c546f048d
SPI 1.8" TFT Starfield demo, Work in Progress

Who changed what in which revision?

UserRevisionLine numberNew contents of line
smultron1977 0:309c546f048d 1 #include "stdio.h"
smultron1977 0:309c546f048d 2 #include "stdlib.h"
smultron1977 0:309c546f048d 3 #include "math.h"
smultron1977 0:309c546f048d 4 #include "mbed.h"
smultron1977 0:309c546f048d 5 #include "ST7735_TFT.h"
smultron1977 0:309c546f048d 6 #include "string"
smultron1977 0:309c546f048d 7 #include "Arial12x12.h"
smultron1977 0:309c546f048d 8 #include "Arial24x23.h"
smultron1977 0:309c546f048d 9 #include "Arial28x28.h"
smultron1977 0:309c546f048d 10
smultron1977 0:309c546f048d 11 #define NUMBER_OF_STARS 300
smultron1977 0:309c546f048d 12 #define SCREEN_WIDTH 128
smultron1977 0:309c546f048d 13 #define SCREEN_HEIGHT 160
smultron1977 0:309c546f048d 14
smultron1977 0:309c546f048d 15 /*star struct*/
smultron1977 0:309c546f048d 16 typedef struct
smultron1977 0:309c546f048d 17 {
smultron1977 0:309c546f048d 18 float xpos, ypos;
smultron1977 0:309c546f048d 19 short zpos, speed;
smultron1977 0:309c546f048d 20 unsigned int color;
smultron1977 0:309c546f048d 21 } STAR;
smultron1977 0:309c546f048d 22
smultron1977 0:309c546f048d 23 static STAR stars[NUMBER_OF_STARS];
smultron1977 0:309c546f048d 24
smultron1977 0:309c546f048d 25
smultron1977 0:309c546f048d 26 void init_star(STAR* star, int i)
smultron1977 0:309c546f048d 27 {
smultron1977 0:309c546f048d 28 /* randomly init stars, generate them around the center of the screen */
smultron1977 0:309c546f048d 29
smultron1977 0:309c546f048d 30 star->xpos = -10.0 + (20.0 * (rand()/(RAND_MAX+1.0)));
smultron1977 0:309c546f048d 31 star->ypos = -10.0 + (20.0 * (rand()/(RAND_MAX+1.0)));
smultron1977 0:309c546f048d 32
smultron1977 0:309c546f048d 33 star->xpos *= 3072.0; /*change viewpoint */
smultron1977 0:309c546f048d 34 star->ypos *= 3072.0;
smultron1977 0:309c546f048d 35
smultron1977 0:309c546f048d 36 star->zpos = i;
smultron1977 0:309c546f048d 37 star->speed = 2 + (int)(2.0 * (rand()/(RAND_MAX+1.0)));
smultron1977 0:309c546f048d 38
smultron1977 0:309c546f048d 39 star->color = i*Cyan >> 2; /*the closer to the viewer the brighter*/
smultron1977 0:309c546f048d 40 }
smultron1977 0:309c546f048d 41
smultron1977 0:309c546f048d 42
smultron1977 0:309c546f048d 43 void init()
smultron1977 0:309c546f048d 44 {
smultron1977 0:309c546f048d 45 int i;
smultron1977 0:309c546f048d 46
smultron1977 0:309c546f048d 47 for (i = 0; i < NUMBER_OF_STARS; i++)
smultron1977 0:309c546f048d 48 {
smultron1977 0:309c546f048d 49 init_star(stars + i, i + 1);
smultron1977 0:309c546f048d 50 }
smultron1977 0:309c546f048d 51 }
smultron1977 0:309c546f048d 52
smultron1977 0:309c546f048d 53
smultron1977 0:309c546f048d 54 // the TFT is connected to SPI pin 5-7, CS is p8, RS is p11, reset is p15
smultron1977 0:309c546f048d 55 ST7735_TFT TFT(p5, p6, p7, p8, p11, p15,"TFT"); // mosi, miso, sclk, cs, rs, reset
smultron1977 0:309c546f048d 56
smultron1977 0:309c546f048d 57 Serial pc(USBTX, USBRX); // tx, rx
smultron1977 0:309c546f048d 58 Timer t;
smultron1977 0:309c546f048d 59
smultron1977 0:309c546f048d 60 extern unsigned char p1[]; // the mbed logo
smultron1977 0:309c546f048d 61
smultron1977 0:309c546f048d 62 int main() {
smultron1977 0:309c546f048d 63
smultron1977 0:309c546f048d 64 unsigned int centerx, centery;
smultron1977 0:309c546f048d 65 int i, j, tempx, tempy;
smultron1977 0:309c546f048d 66 init();
smultron1977 0:309c546f048d 67 TFT.set_orientation(1);
smultron1977 0:309c546f048d 68 centerx = TFT.width() >> 1;
smultron1977 0:309c546f048d 69 centery = TFT.height() >> 1;
smultron1977 0:309c546f048d 70
smultron1977 0:309c546f048d 71
smultron1977 0:309c546f048d 72 TFT.claim(stdout); // send stdout to the TFT display
smultron1977 0:309c546f048d 73 //TFT.claim(stderr); // send stderr to the TFT display
smultron1977 0:309c546f048d 74
smultron1977 0:309c546f048d 75 TFT.background(Black); // set background to black
smultron1977 0:309c546f048d 76 TFT.foreground(White); // set chars to white
smultron1977 0:309c546f048d 77
smultron1977 0:309c546f048d 78 TFT.cls();
smultron1977 0:309c546f048d 79 TFT.set_font((unsigned char*) Arial24x23); // select the font
smultron1977 0:309c546f048d 80
smultron1977 0:309c546f048d 81 t.start();
smultron1977 0:309c546f048d 82
smultron1977 0:309c546f048d 83 ////// demo start
smultron1977 0:309c546f048d 84
smultron1977 0:309c546f048d 85 for ( j = 0 ; j < 10000; j++ )
smultron1977 0:309c546f048d 86 {
smultron1977 0:309c546f048d 87
smultron1977 0:309c546f048d 88 /* move and draw stars */
smultron1977 0:309c546f048d 89
smultron1977 0:309c546f048d 90 for (i = 0; i < NUMBER_OF_STARS; i++)
smultron1977 0:309c546f048d 91 {
smultron1977 0:309c546f048d 92 tempx = (stars[i].xpos / stars[i].zpos) + centerx;
smultron1977 0:309c546f048d 93 tempy = (stars[i].ypos / stars[i].zpos) + centery;
smultron1977 0:309c546f048d 94 TFT.pixel(tempx,tempy,Black);
smultron1977 0:309c546f048d 95
smultron1977 0:309c546f048d 96
smultron1977 0:309c546f048d 97 stars[i].zpos -= stars[i].speed;
smultron1977 0:309c546f048d 98
smultron1977 0:309c546f048d 99 if (stars[i].zpos <= 0)
smultron1977 0:309c546f048d 100 {
smultron1977 0:309c546f048d 101 init_star(stars + i, i + 1);
smultron1977 0:309c546f048d 102 }
smultron1977 0:309c546f048d 103
smultron1977 0:309c546f048d 104 //compute 3D position
smultron1977 0:309c546f048d 105 tempx = (stars[i].xpos / stars[i].zpos) + centerx;
smultron1977 0:309c546f048d 106 tempy = (stars[i].ypos / stars[i].zpos) + centery;
smultron1977 0:309c546f048d 107
smultron1977 0:309c546f048d 108 if (tempx < 0 || tempx > TFT.width() - 1 || tempy < 0 || tempy > TFT.height() - 1) //check if a star leaves the screen
smultron1977 0:309c546f048d 109 {
smultron1977 0:309c546f048d 110 init_star(stars + i, i + 1);
smultron1977 0:309c546f048d 111 continue;
smultron1977 0:309c546f048d 112 }
smultron1977 0:309c546f048d 113
smultron1977 0:309c546f048d 114 TFT.pixel(tempx,tempy,stars[i].color);
smultron1977 0:309c546f048d 115
smultron1977 0:309c546f048d 116 }
smultron1977 0:309c546f048d 117 TFT.Bitmap(centerx-60,centery-19,120,38,p1);
smultron1977 0:309c546f048d 118 }
smultron1977 0:309c546f048d 119
smultron1977 0:309c546f048d 120 ///// demo stop
smultron1977 0:309c546f048d 121
smultron1977 0:309c546f048d 122 t.stop();
smultron1977 0:309c546f048d 123 TFT.locate(0,10);
smultron1977 0:309c546f048d 124 TFT.set_font((unsigned char*) Arial12x12); // select the font
smultron1977 0:309c546f048d 125 printf("Time %f s\n", t.read());
smultron1977 0:309c546f048d 126 }