E Shibut / Mbed 2 deprecated Etch-A-Sketch

Digital version of the classic game, with color selection.

Dependencies:   4DGL-uLCD-SE LSM9DS0 mbed-rtos mbed

main.cpp@0:98ea2d58b42a, 2015-10-20 (annotated)

Committer:
eshibut3
Date:
Tue Oct 20 23:03:34 2015 +0000
Revision:
0:98ea2d58b42a
Initial commit. Three threads for erasing, color selection, and drawing on a digital Etch-A-Sketch.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
eshibut3 0:98ea2d58b42a 1 #include "mbed.h"
eshibut3 0:98ea2d58b42a 2 #include "LSM9DS0.h"
eshibut3 0:98ea2d58b42a 3 #include "rtos.h"
eshibut3 0:98ea2d58b42a 4 #include "uLCD_4DGL.h"
eshibut3 0:98ea2d58b42a 5
eshibut3 0:98ea2d58b42a 6 // SDO_XM and SDO_G are pulled up, so our addresses are:
eshibut3 0:98ea2d58b42a 7 #define LSM9DS0_XM_ADDR 0x1D // Would be 0x1E if SDO_XM is LOW
eshibut3 0:98ea2d58b42a 8 #define LSM9DS0_G_ADDR 0x6B // Would be 0x6A if SDO_G is LOW
eshibut3 0:98ea2d58b42a 9
eshibut3 0:98ea2d58b42a 10
eshibut3 0:98ea2d58b42a 11 LSM9DS0 imu(p9, p10, LSM9DS0_G_ADDR, LSM9DS0_XM_ADDR);
eshibut3 0:98ea2d58b42a 12
eshibut3 0:98ea2d58b42a 13 SPI shiftbrite(p5, p6, p7);
eshibut3 0:98ea2d58b42a 14 Mutex color_lock;
eshibut3 0:98ea2d58b42a 15 DigitalOut latch(p11);
eshibut3 0:98ea2d58b42a 16 DigitalOut enable(p8);
eshibut3 0:98ea2d58b42a 17
eshibut3 0:98ea2d58b42a 18 AnalogIn dial(p15);
eshibut3 0:98ea2d58b42a 19
eshibut3 0:98ea2d58b42a 20 uLCD_4DGL lcd(p28, p27, p30);
eshibut3 0:98ea2d58b42a 21 Mutex lcd_lock;
eshibut3 0:98ea2d58b42a 22
eshibut3 0:98ea2d58b42a 23 //5-way switch
eshibut3 0:98ea2d58b42a 24 DigitalIn right(p16);
eshibut3 0:98ea2d58b42a 25 DigitalIn down(p17);
eshibut3 0:98ea2d58b42a 26 DigitalIn left(p18);
eshibut3 0:98ea2d58b42a 27 DigitalIn center(p19);
eshibut3 0:98ea2d58b42a 28 DigitalIn up(p20);
eshibut3 0:98ea2d58b42a 29
eshibut3 0:98ea2d58b42a 30 //Color selection
eshibut3 0:98ea2d58b42a 31 int selector = 0;
eshibut3 0:98ea2d58b42a 32 DigitalOut red_sel(LED1);
eshibut3 0:98ea2d58b42a 33 DigitalOut green_sel(LED2);
eshibut3 0:98ea2d58b42a 34 DigitalOut blue_sel(LED3);
eshibut3 0:98ea2d58b42a 35
eshibut3 0:98ea2d58b42a 36 //current location on lcd NOTE: the 'pixel' drawn is actually 4 pixels (on a 64x64 grid)
eshibut3 0:98ea2d58b42a 37 int pixel_x = 63;
eshibut3 0:98ea2d58b42a 38 int pixel_y = 63;
eshibut3 0:98ea2d58b42a 39 int color_value = 0x8A2BE2;
eshibut3 0:98ea2d58b42a 40
eshibut3 0:98ea2d58b42a 41 //Thread checking for shaking (and clearing LCD if occuring)
eshibut3 0:98ea2d58b42a 42 void erase_thread(void const*args)
eshibut3 0:98ea2d58b42a 43 {
eshibut3 0:98ea2d58b42a 44 while(true) {
eshibut3 0:98ea2d58b42a 45 imu.readAccel();
eshibut3 0:98ea2d58b42a 46 printf("%.2f %.2f %.2f\n", imu.ax, imu.ay, imu.az);
eshibut3 0:98ea2d58b42a 47 if (imu.ax > .20 || imu.ay > .20 || imu.az > 1.5) {
eshibut3 0:98ea2d58b42a 48 lcd_lock.lock();
eshibut3 0:98ea2d58b42a 49 lcd.cls();
eshibut3 0:98ea2d58b42a 50 lcd_lock.unlock();
eshibut3 0:98ea2d58b42a 51 }
eshibut3 0:98ea2d58b42a 52 Thread::wait(500);
eshibut3 0:98ea2d58b42a 53 }
eshibut3 0:98ea2d58b42a 54 }
eshibut3 0:98ea2d58b42a 55
eshibut3 0:98ea2d58b42a 56 //Thread updating/changing the color
eshibut3 0:98ea2d58b42a 57 void color_thread(void const*args)
eshibut3 0:98ea2d58b42a 58 {
eshibut3 0:98ea2d58b42a 59 red_sel=1;
eshibut3 0:98ea2d58b42a 60 int red=0;
eshibut3 0:98ea2d58b42a 61 int green=0;
eshibut3 0:98ea2d58b42a 62 int blue=0;
eshibut3 0:98ea2d58b42a 63 unsigned int high=0;
eshibut3 0:98ea2d58b42a 64 unsigned int low=0;
eshibut3 0:98ea2d58b42a 65 while(true) {
eshibut3 0:98ea2d58b42a 66 //Figure out which color selector is being used
eshibut3 0:98ea2d58b42a 67 if (!center) {
eshibut3 0:98ea2d58b42a 68 selector = (selector==2)? 0: selector + 1;
eshibut3 0:98ea2d58b42a 69 //Display selector
eshibut3 0:98ea2d58b42a 70 red_sel = (selector==0);
eshibut3 0:98ea2d58b42a 71 green_sel = (selector==1);
eshibut3 0:98ea2d58b42a 72 blue_sel = (selector==2);
eshibut3 0:98ea2d58b42a 73 }
eshibut3 0:98ea2d58b42a 74 if (selector == 0)
eshibut3 0:98ea2d58b42a 75 red = dial*0xFF;
eshibut3 0:98ea2d58b42a 76 else if (selector == 1)
eshibut3 0:98ea2d58b42a 77 green = dial*0xFF;
eshibut3 0:98ea2d58b42a 78 else if (selector == 2)
eshibut3 0:98ea2d58b42a 79 blue = dial*0xFF;
eshibut3 0:98ea2d58b42a 80 high = (blue<<4) | ((red&0x3C0)>>6);
eshibut3 0:98ea2d58b42a 81 low = (((red&0x3F)<<10)|(green));
eshibut3 0:98ea2d58b42a 82 shiftbrite.write(high);
eshibut3 0:98ea2d58b42a 83 shiftbrite.write(low);
eshibut3 0:98ea2d58b42a 84 latch=1;
eshibut3 0:98ea2d58b42a 85 latch=0;
eshibut3 0:98ea2d58b42a 86 color_lock.lock();
eshibut3 0:98ea2d58b42a 87 color_value = (red<<16)| (green<<8) | blue;
eshibut3 0:98ea2d58b42a 88 color_lock.unlock();
eshibut3 0:98ea2d58b42a 89 Thread::wait(500);
eshibut3 0:98ea2d58b42a 90 }
eshibut3 0:98ea2d58b42a 91
eshibut3 0:98ea2d58b42a 92 }
eshibut3 0:98ea2d58b42a 93
eshibut3 0:98ea2d58b42a 94 //Main thread reads in tactile switch, draws to LCD
eshibut3 0:98ea2d58b42a 95 int main()
eshibut3 0:98ea2d58b42a 96 {
eshibut3 0:98ea2d58b42a 97 //Initializations and set-up
eshibut3 0:98ea2d58b42a 98 imu.begin();
eshibut3 0:98ea2d58b42a 99 shiftbrite.format(16,0);
eshibut3 0:98ea2d58b42a 100 shiftbrite.frequency(500000);
eshibut3 0:98ea2d58b42a 101 enable=0;
eshibut3 0:98ea2d58b42a 102 latch=0;
eshibut3 0:98ea2d58b42a 103 wait(2);
eshibut3 0:98ea2d58b42a 104
eshibut3 0:98ea2d58b42a 105 Thread eraser(erase_thread);
eshibut3 0:98ea2d58b42a 106 Thread color(color_thread);
eshibut3 0:98ea2d58b42a 107 bool no_movement = false;
eshibut3 0:98ea2d58b42a 108 lcd_lock.lock();
eshibut3 0:98ea2d58b42a 109 lcd.background_color(0x606060);
eshibut3 0:98ea2d58b42a 110 lcd.cls();
eshibut3 0:98ea2d58b42a 111 lcd_lock.unlock();
eshibut3 0:98ea2d58b42a 112 while(1) {
eshibut3 0:98ea2d58b42a 113 no_movement = false; //flag indicating the joystick has been triggered
eshibut3 0:98ea2d58b42a 114 if (!down && pixel_y != 0)
eshibut3 0:98ea2d58b42a 115 pixel_y--;
eshibut3 0:98ea2d58b42a 116 else if (!up && pixel_y!=63)
eshibut3 0:98ea2d58b42a 117 pixel_y++;
eshibut3 0:98ea2d58b42a 118 else if (!right && pixel_x!=0)
eshibut3 0:98ea2d58b42a 119 pixel_x--;
eshibut3 0:98ea2d58b42a 120 else if (!left && pixel_x!=63)
eshibut3 0:98ea2d58b42a 121 pixel_x++;
eshibut3 0:98ea2d58b42a 122 else
eshibut3 0:98ea2d58b42a 123 no_movement = true;
eshibut3 0:98ea2d58b42a 124 if (!no_movement) { // update the lcd screen
eshibut3 0:98ea2d58b42a 125 lcd_lock.lock();
eshibut3 0:98ea2d58b42a 126 color_lock.lock();
eshibut3 0:98ea2d58b42a 127 lcd.filled_rectangle(pixel_x<<1, pixel_y<<1, (pixel_x<<1)+1, (pixel_y<<1)+1, color_value);
eshibut3 0:98ea2d58b42a 128 color_lock.unlock();
eshibut3 0:98ea2d58b42a 129 lcd_lock.unlock();
eshibut3 0:98ea2d58b42a 130 }
eshibut3 0:98ea2d58b42a 131 Thread::wait(100);
eshibut3 0:98ea2d58b42a 132 }
eshibut3 0:98ea2d58b42a 133 }