Yulou Yang / Mbed 2 deprecated mbed_max2719

maze game

Dependencies:   MMA8451Q mbed

Fork of mbed_max2719 by David Wynn

main.cpp@1:ac65e35a9196, 2016-04-11 (annotated)

Committer:
yangyulounk
Date:
Mon Apr 11 17:41:17 2016 +0000
Revision:
1:ac65e35a9196
Parent:
0:6be425a138b2 
maze game

Who changed what in which revision?

UserRevisionLine numberNew contents of line
alexwynn41 0:6be425a138b2 1 /* 06_spi_max7219_led8x8
alexwynn41 0:6be425a138b2 2 *
alexwynn41 0:6be425a138b2 3 * Simple demo to drive a 8x8-as LED matrix by a MAX7219 LED driver IC
alexwynn41 0:6be425a138b2 4 * After initialisation two characters (H and W) are displayed alternatively.
alexwynn41 0:6be425a138b2 5 * The MAX7219 IC is driven by hardware SPI: SPI0 module at PTD1, PTD2, PTD3.
alexwynn41 0:6be425a138b2 6 */
yangyulounk 1:ac65e35a9196 7
alexwynn41 0:6be425a138b2 8 #include "mbed.h"
alexwynn41 0:6be425a138b2 9 #include "MMA8451Q.h"
alexwynn41 0:6be425a138b2 10
alexwynn41 0:6be425a138b2 11 PinName const SDA = PTE25;
alexwynn41 0:6be425a138b2 12 PinName const SCL = PTE24;
yangyulounk 1:ac65e35a9196 13
alexwynn41 0:6be425a138b2 14 SPI spi(PTD2, PTD3, PTD1); // Arduino compatible MOSI, MISO, SCLK
alexwynn41 0:6be425a138b2 15 DigitalOut cs(PTD0); // Chip select
yangyulounk 1:ac65e35a9196 16 int point []= {0,2};
alexwynn41 0:6be425a138b2 17
alexwynn41 0:6be425a138b2 18 #define MMA8451_I2C_ADDRESS (0x1d<<1)
yangyulounk 1:ac65e35a9196 19
alexwynn41 0:6be425a138b2 20 const unsigned char led2[]= {
yangyulounk 1:ac65e35a9196 21 0xFF,0xB4,0x15,0xD1,0x85,0xB5,0x95,0xFF};//maze wall
yangyulounk 1:ac65e35a9196 22
yangyulounk 1:ac65e35a9196 23 //0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};//no maze wall
yangyulounk 1:ac65e35a9196 24 unsigned char led1[]= {
yangyulounk 1:ac65e35a9196 25 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
yangyulounk 1:ac65e35a9196 26 }; //
yangyulounk 1:ac65e35a9196 27
alexwynn41 0:6be425a138b2 28 /// Send two bytes to SPI bus
alexwynn41 0:6be425a138b2 29 void SPI_Write2(unsigned char MSB, unsigned char LSB)
alexwynn41 0:6be425a138b2 30 {
alexwynn41 0:6be425a138b2 31 cs = 0; // Set CS Low
alexwynn41 0:6be425a138b2 32 spi.write(MSB); // Send two bytes
alexwynn41 0:6be425a138b2 33 spi.write(LSB);
alexwynn41 0:6be425a138b2 34 cs = 1; // Set CS High
alexwynn41 0:6be425a138b2 35 }
alexwynn41 0:6be425a138b2 36
yangyulounk 1:ac65e35a9196 37 bool isNotWall(int x,int y)
yangyulounk 1:ac65e35a9196 38 {
yangyulounk 1:ac65e35a9196 39 bool result=false;
yangyulounk 1:ac65e35a9196 40 if(x>=0&&x<8&&y>=0&&y<8) {
yangyulounk 1:ac65e35a9196 41 int wallline =led2[y];
yangyulounk 1:ac65e35a9196 42 int pointline=(unsigned char)(1<<(7-x));
yangyulounk 1:ac65e35a9196 43 printf("%d %d\n",wallline,pointline);
yangyulounk 1:ac65e35a9196 44
yangyulounk 1:ac65e35a9196 45 if((wallline|pointline)!=wallline) {
yangyulounk 1:ac65e35a9196 46 result=true;
yangyulounk 1:ac65e35a9196 47
yangyulounk 1:ac65e35a9196 48 }
yangyulounk 1:ac65e35a9196 49
yangyulounk 1:ac65e35a9196 50 /*
yangyulounk 1:ac65e35a9196 51 101
yangyulounk 1:ac65e35a9196 52 100
yangyulounk 1:ac65e35a9196 53
yangyulounk 1:ac65e35a9196 54 |101
yangyulounk 1:ac65e35a9196 55 &100
yangyulounk 1:ac65e35a9196 56
yangyulounk 1:ac65e35a9196 57 101
yangyulounk 1:ac65e35a9196 58 010
yangyulounk 1:ac65e35a9196 59
yangyulounk 1:ac65e35a9196 60 |111
yangyulounk 1:ac65e35a9196 61 &000
yangyulounk 1:ac65e35a9196 62 */
yangyulounk 1:ac65e35a9196 63 }
yangyulounk 1:ac65e35a9196 64 return result;
alexwynn41 0:6be425a138b2 65 }
yangyulounk 1:ac65e35a9196 66 void direction(float x, float y)
yangyulounk 1:ac65e35a9196 67 {
yangyulounk 1:ac65e35a9196 68
yangyulounk 1:ac65e35a9196 69 if(x > 0.5) {
yangyulounk 1:ac65e35a9196 70 if(isNotWall(point[0]+1,point[1])) {
yangyulounk 1:ac65e35a9196 71 point[0]++;
yangyulounk 1:ac65e35a9196 72 }
yangyulounk 1:ac65e35a9196 73 printf("Left %d %d\n",point[0],point[1]);
yangyulounk 1:ac65e35a9196 74 } else if(x < -0.5) {
yangyulounk 1:ac65e35a9196 75 if(isNotWall(point[0]-1,point[1])) {
yangyulounk 1:ac65e35a9196 76 point[0]--;
yangyulounk 1:ac65e35a9196 77 }
yangyulounk 1:ac65e35a9196 78 printf("Right %d %d\n",point[0],point[1]);
yangyulounk 1:ac65e35a9196 79 } else if(y > 0.5) {
yangyulounk 1:ac65e35a9196 80 if(isNotWall(point[0],point[1]-1)) {
yangyulounk 1:ac65e35a9196 81 point[1]--;
yangyulounk 1:ac65e35a9196 82 }
yangyulounk 1:ac65e35a9196 83 printf("Down %d %d\n",point[0],point[1]);
yangyulounk 1:ac65e35a9196 84 } else if(y < -0.5) {
yangyulounk 1:ac65e35a9196 85 if(isNotWall(point[0],point[1]+1)) {
yangyulounk 1:ac65e35a9196 86 point[1]++;
yangyulounk 1:ac65e35a9196 87 }
yangyulounk 1:ac65e35a9196 88 printf("Up %d %d\n",point[0],point[1]);
yangyulounk 1:ac65e35a9196 89 } else {
yangyulounk 1:ac65e35a9196 90 printf("Neutral Position \n");
yangyulounk 1:ac65e35a9196 91 }
yangyulounk 1:ac65e35a9196 92 }
yangyulounk 1:ac65e35a9196 93
yangyulounk 1:ac65e35a9196 94
yangyulounk 1:ac65e35a9196 95
alexwynn41 0:6be425a138b2 96 /// MAX7219 initialisation
alexwynn41 0:6be425a138b2 97 void Init_MAX7219(void)
alexwynn41 0:6be425a138b2 98 {
alexwynn41 0:6be425a138b2 99 SPI_Write2(0x09, 0x00); // Decoding off
alexwynn41 0:6be425a138b2 100 SPI_Write2(0x0A, 0x08); // Brightness to intermediate
alexwynn41 0:6be425a138b2 101 SPI_Write2(0x0B, 0x07); // Scan limit = 7
alexwynn41 0:6be425a138b2 102 SPI_Write2(0x0C, 0x01); // Normal operation mode
alexwynn41 0:6be425a138b2 103 SPI_Write2(0x0F, 0x0F); // Enable display test
alexwynn41 0:6be425a138b2 104 wait_ms(500); // 500 ms delay
alexwynn41 0:6be425a138b2 105 SPI_Write2(0x01, 0x00); // Clear row 0.
alexwynn41 0:6be425a138b2 106 SPI_Write2(0x02, 0x00); // Clear row 1.
alexwynn41 0:6be425a138b2 107 SPI_Write2(0x03, 0x00); // Clear row 2.
alexwynn41 0:6be425a138b2 108 SPI_Write2(0x04, 0x00); // Clear row 3.
alexwynn41 0:6be425a138b2 109 SPI_Write2(0x05, 0x00); // Clear row 4.
alexwynn41 0:6be425a138b2 110 SPI_Write2(0x06, 0x00); // Clear row 5.
alexwynn41 0:6be425a138b2 111 SPI_Write2(0x07, 0x00); // Clear row 6.
alexwynn41 0:6be425a138b2 112 SPI_Write2(0x08, 0x00); // Clear row 7.
alexwynn41 0:6be425a138b2 113 SPI_Write2(0x0F, 0x00); // Disable display test
alexwynn41 0:6be425a138b2 114 wait_ms(500); // 500 ms delay
alexwynn41 0:6be425a138b2 115 }
yangyulounk 1:ac65e35a9196 116
yangyulounk 1:ac65e35a9196 117
yangyulounk 1:ac65e35a9196 118 void clearMap(unsigned char *map )
yangyulounk 1:ac65e35a9196 119 {
yangyulounk 1:ac65e35a9196 120 for (int i=0; i<8; i++) {
yangyulounk 1:ac65e35a9196 121 map[i]=0x00;
yangyulounk 1:ac65e35a9196 122 }
yangyulounk 1:ac65e35a9196 123 }
yangyulounk 1:ac65e35a9196 124
yangyulounk 1:ac65e35a9196 125 void updateMap( )
yangyulounk 1:ac65e35a9196 126 {
yangyulounk 1:ac65e35a9196 127 clearMap(led1);
yangyulounk 1:ac65e35a9196 128 led1[point[1]]=(unsigned char)(1<<(7-point[0]));
yangyulounk 1:ac65e35a9196 129
yangyulounk 1:ac65e35a9196 130 }
yangyulounk 1:ac65e35a9196 131
yangyulounk 1:ac65e35a9196 132
alexwynn41 0:6be425a138b2 133 int main()
alexwynn41 0:6be425a138b2 134 {
yangyulounk 1:ac65e35a9196 135
alexwynn41 0:6be425a138b2 136 cs = 1; // CS initially High
alexwynn41 0:6be425a138b2 137 spi.format(8,0); // 8-bit format, mode 0,0
alexwynn41 0:6be425a138b2 138 spi.frequency(1000000); // SCLK = 1 MHz
alexwynn41 0:6be425a138b2 139 Init_MAX7219(); // Initialize the LED controller
alexwynn41 0:6be425a138b2 140 MMA8451Q acc(SDA, SCL, MMA8451_I2C_ADDRESS);
yangyulounk 1:ac65e35a9196 141
yangyulounk 1:ac65e35a9196 142
yangyulounk 1:ac65e35a9196 143
alexwynn41 0:6be425a138b2 144 while (1) {
yangyulounk 1:ac65e35a9196 145
yangyulounk 1:ac65e35a9196 146 float x, y;
alexwynn41 0:6be425a138b2 147 x = acc.getAccX();
alexwynn41 0:6be425a138b2 148 y = acc.getAccY();
yangyulounk 1:ac65e35a9196 149
alexwynn41 0:6be425a138b2 150 direction(x,y);
yangyulounk 1:ac65e35a9196 151 updateMap();
yangyulounk 1:ac65e35a9196 152
yangyulounk 1:ac65e35a9196 153
yangyulounk 1:ac65e35a9196 154 wait(0.5);
alexwynn41 0:6be425a138b2 155
alexwynn41 0:6be425a138b2 156 for(int i=1; i<9; i++) // Write first character (8 rows)
yangyulounk 1:ac65e35a9196 157 SPI_Write2(i,led1[i-1]|led2[i-1]);
yangyulounk 1:ac65e35a9196 158 wait(0.5);
yangyulounk 1:ac65e35a9196 159 for(int i=1; i<9; i++) // Write first character (8 rows)
alexwynn41 0:6be425a138b2 160 SPI_Write2(i,led2[i-1]);
alexwynn41 0:6be425a138b2 161 }
yangyulounk 1:ac65e35a9196 162
yangyulounk 1:ac65e35a9196 163
alexwynn41 0:6be425a138b2 164 }