Ling-Jyh Chen / Mbed 2 deprecated app_board-Lottery

refine the lottery algorithm to reduce its computational complexity

Dependencies:   C12832 mbed

Fork of app_board-Lottery by WuLung Hsu

main.cpp@0:e0789676dfe5, 2016-07-20 (annotated)

Committer:
wuulong
Date:
Wed Jul 20 09:15:23 2016 +0000
Revision:
0:e0789676dfe5
Child:
1:c9dba148697b
First version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wuulong 0:e0789676dfe5 1 /**
wuulong 0:e0789676dfe5 2 README: The Lottery toy that used in LASS Users and Developers conference.
wuulong 0:e0789676dfe5 3 Each run will generate GIFT_MAXCNT non-repeat number, random range ( 1 to MAN_MAXCNT )
wuulong 0:e0789676dfe5 4 */
wuulong 0:e0789676dfe5 5 #include "mbed.h"
wuulong 0:e0789676dfe5 6 #include "C12832.h"
wuulong 0:e0789676dfe5 7
wuulong 0:e0789676dfe5 8
wuulong 0:e0789676dfe5 9 C12832 lcd(p5, p7, p6, p8, p11);
wuulong 0:e0789676dfe5 10 DigitalIn fire(p14);
wuulong 0:e0789676dfe5 11
wuulong 0:e0789676dfe5 12 BusOut leds(LED1,LED2,LED3,LED4);
wuulong 0:e0789676dfe5 13 AnalogIn RandomIn(p17); // use the random noise on this analog input to seed the random generator
wuulong 0:e0789676dfe5 14 #define GIFT_MAXCNT 24 // Max gift count
wuulong 0:e0789676dfe5 15 #define MAN_MAXCNT 120 // How many users
wuulong 0:e0789676dfe5 16
wuulong 0:e0789676dfe5 17
wuulong 0:e0789676dfe5 18 void SetLed(uint8_t ledID, bool on)
wuulong 0:e0789676dfe5 19 {
wuulong 0:e0789676dfe5 20 if (ledID <= 6) {
wuulong 0:e0789676dfe5 21 if (on)
wuulong 0:e0789676dfe5 22 leds = leds | (0x01 << ledID);
wuulong 0:e0789676dfe5 23 else
wuulong 0:e0789676dfe5 24 leds = leds & ~(0x01 << ledID);
wuulong 0:e0789676dfe5 25 }
wuulong 0:e0789676dfe5 26 }
wuulong 0:e0789676dfe5 27
wuulong 0:e0789676dfe5 28 void SweepAllLeds(bool leftToRight, float delay)
wuulong 0:e0789676dfe5 29 {
wuulong 0:e0789676dfe5 30 leds=0;
wuulong 0:e0789676dfe5 31 wait(delay);
wuulong 0:e0789676dfe5 32 for(int n=0; n<4; n++) {
wuulong 0:e0789676dfe5 33 rand();
wuulong 0:e0789676dfe5 34 SetLed(leftToRight?n:4-n, true);
wuulong 0:e0789676dfe5 35 wait(delay); // delay
wuulong 0:e0789676dfe5 36 }
wuulong 0:e0789676dfe5 37 }
wuulong 0:e0789676dfe5 38
wuulong 0:e0789676dfe5 39 int main()
wuulong 0:e0789676dfe5 40 {
wuulong 0:e0789676dfe5 41 int gift[GIFT_MAXCNT];
wuulong 0:e0789676dfe5 42
wuulong 0:e0789676dfe5 43 lcd.cls();
wuulong 0:e0789676dfe5 44 lcd.locate(0,3);
wuulong 0:e0789676dfe5 45 lcd.printf("LASS Conference");
wuulong 0:e0789676dfe5 46 lcd.locate(0,15);
wuulong 0:e0789676dfe5 47 lcd.printf("Lottery 1-120");
wuulong 0:e0789676dfe5 48 while (!fire) { // After botton pressed, generate random seed
wuulong 0:e0789676dfe5 49 SweepAllLeds(true,0.01);
wuulong 0:e0789676dfe5 50 uint32_t seedValue = 0;
wuulong 0:e0789676dfe5 51 uint16_t value;
wuulong 0:e0789676dfe5 52 uint8_t counter;
wuulong 0:e0789676dfe5 53
wuulong 0:e0789676dfe5 54 for (counter = 0; counter < 32; counter++) {
wuulong 0:e0789676dfe5 55 seedValue = seedValue<<1;
wuulong 0:e0789676dfe5 56 value = RandomIn.read_u16(); // reads a 10 bit ADC normalised to 16 bits.
wuulong 0:e0789676dfe5 57 if (value & 0x0040) // LSB of ADC output is a 1
wuulong 0:e0789676dfe5 58 seedValue++;
wuulong 0:e0789676dfe5 59 }
wuulong 0:e0789676dfe5 60 srand(seedValue);
wuulong 0:e0789676dfe5 61 }
wuulong 0:e0789676dfe5 62
wuulong 0:e0789676dfe5 63 // show some UI to feel like Lottery
wuulong 0:e0789676dfe5 64 lcd.cls();
wuulong 0:e0789676dfe5 65 lcd.locate(0,3);
wuulong 0:e0789676dfe5 66 lcd.printf("Begin Lottery...");
wuulong 0:e0789676dfe5 67 SweepAllLeds(true,0.1);
wuulong 0:e0789676dfe5 68 SweepAllLeds(true,0.1);
wuulong 0:e0789676dfe5 69 SweepAllLeds(true,0.1);
wuulong 0:e0789676dfe5 70 SweepAllLeds(true,0.1);
wuulong 0:e0789676dfe5 71 float twait=(rand()%10)/10;
wuulong 0:e0789676dfe5 72 wait(twait);
wuulong 0:e0789676dfe5 73 lcd.locate(0,3);
wuulong 0:e0789676dfe5 74 lcd.cls();
wuulong 0:e0789676dfe5 75 // Generate non-repeat users
wuulong 0:e0789676dfe5 76 for(int i=0;i<GIFT_MAXCNT;i++){
wuulong 0:e0789676dfe5 77 while(1){
wuulong 0:e0789676dfe5 78 int rand_num = rand()%MAN_MAXCNT;
wuulong 0:e0789676dfe5 79 int repeat=0;
wuulong 0:e0789676dfe5 80 for(int j=0;j<i;j++){
wuulong 0:e0789676dfe5 81 if( gift[j] == rand_num ) repeat=1;
wuulong 0:e0789676dfe5 82 }
wuulong 0:e0789676dfe5 83 if(repeat==0){
wuulong 0:e0789676dfe5 84 gift[i] = rand_num;
wuulong 0:e0789676dfe5 85 break;
wuulong 0:e0789676dfe5 86 }
wuulong 0:e0789676dfe5 87 }
wuulong 0:e0789676dfe5 88 }
wuulong 0:e0789676dfe5 89 // Show the results on LCD
wuulong 0:e0789676dfe5 90 for(int i=0;i<GIFT_MAXCNT;i++){
wuulong 0:e0789676dfe5 91 int x=(i % 8)*16;
wuulong 0:e0789676dfe5 92 int y = int(i/8)*10;
wuulong 0:e0789676dfe5 93 lcd.locate(x,y);
wuulong 0:e0789676dfe5 94 lcd.printf("%3d", gift[i]);
wuulong 0:e0789676dfe5 95 }
wuulong 0:e0789676dfe5 96
wuulong 0:e0789676dfe5 97 }