Appendix 2: Video Code

//Gustavo Bitdinger - gbb7

//Rangarajan Rajagopalan - rr234

//ECE 476 Final Project - Weatherdog

//Mon. May 2, 2005

#pragma regalloc- //I allocate the registers myself

#pragma optsize- //optimize for speed

#include <Mega32.h>

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

#include <delay.h>

#include <string.h>

//cycles = 63.625 * 16 Note NTSC is 63.55

//but this line duration makes each frame exactly 1/60 sec

//which is nice for keeping a realtime clock

#define lineTime 1018

#define begin {

#define end }

//screen line definitions

#define ScreenTop 30

#define ScreenBot 230

#define width 126

#define length 99

#define inner_top 11

#define inner_bottom 76

//NOTE that v1 to v8 and i must be in registers!

register char v1 @4;

register char v2 @5;

register char v3 @6;

register char v4 @7;

register char v5 @8;

register char v6 @9;

register char v7 @10;

register char v8 @11;

register int i @12;

register int j @13;

#define LCDwidth 16

//define some states

#define PLAY 0

#define WAIT1 1

#define WAIT2 2

#pragma regalloc+

//video synchronizationvariables

char syncON, syncOFF;

int LineCount;

unsigned char keyboard_input; //input from EITHER keyboard or PC

char screen[1600], t, ts[10], temp_string[2];

//some strings to print to the TV

char program_string[] = "WEATHERDOG";

char copyright_string[] = "C.2005";

char input_string[] = "SEARCH@ICAO@CODE:@";

char result_temperature[] = "TEMP@DEG@F@@@";

char result_humidity[] = "HUMID@PERCENT";

char result_wind[] = "WIND MPH@@@@@";

char result_visibility[] = "VISIBILITY@MI";

char blankStr[] = " ";

char blankStr1[] = " ";

char blankStr2[] = " ";

char small_blankStr[] = "@@@@@@@@@";

char searching[] = "SEARCHING";

int index; //index of where cursor for input search is

int index1; //index for where cursor of return value from PC is

unsigned char blank_clear; //a state variable that decides what on the screen has been cleared on a PC return of data

unsigned char done_clear; //indicates that all screen clearing has been finished

unsigned char from_pc; //indicates if input over SPI is from keyboard or PC

unsigned char tv_position; //indicates which parameter returned by the PC is being output to the TV

unsigned char not_displayed; //indicates if a character is unknown and thus not to be displayed

//Point plot lookup table

//One bit masks

flash char pos[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};

//define some character bitmaps

//5x7 characters

flash char bitmap[41][7]={

//0

0b01110000,

0b10001000,

0b10011000,

0b10101000,

0b11001000,

0b10001000,

0b01110000,

//1

0b00100000,

0b01100000,

0b00100000,

0b00100000,

0b00100000,

0b00100000,

0b01110000,

//2

0b01110000,

0b10001000,

0b00001000,

0b00010000,

0b00100000,

0b01000000,

0b11111000,

//3

0b11111000,

0b00010000,

0b00100000,

0b00010000,

0b00001000,

0b10001000,

0b01110000,

//4

0b00010000,

0b00110000,

0b01010000,

0b10010000,

0b11111000,

0b00010000,

0b00010000,

//5

0b11111000,

0b10000000,

0b11110000,

0b00001000,

0b00001000,

0b10001000,

0b01110000,

//6

0b01000000,

0b10000000,

0b10000000,

0b11110000,

0b10001000,

0b10001000,

0b01110000,

//7

0b11111000,

0b00001000,

0b00010000,

0b00100000,

0b01000000,

0b10000000,

0b10000000,

//8

0b01110000,

0b10001000,

0b10001000,

0b01110000,

0b10001000,

0b10001000,

0b01110000,

//9

0b01110000,

0b10001000,

0b10001000,

0b01111000,

0b00001000,

0b00001000,

0b00010000,

//A

0b01110000,

0b10001000,

0b10001000,

0b10001000,

0b11111000,

0b10001000,

0b10001000,

//B

0b11110000,

0b10001000,

0b10001000,

0b11110000,

0b10001000,

0b10001000,

0b11110000,

//C

0b01110000,

0b10001000,

0b10000000,

0b10000000,

0b10000000,

0b10001000,

0b01110000,

//D

0b11110000,

0b10001000,

0b10001000,

0b10001000,

0b10001000,

0b10001000,

0b11110000,

//E

0b11111000,

0b10000000,

0b10000000,

0b11111000,

0b10000000,

0b10000000,

0b11111000,

//F

0b11111000,

0b10000000,

0b10000000,

0b11111000,

0b10000000,

0b10000000,

0b10000000,

//G

0b01110000,

0b10001000,

0b10000000,

0b10011000,

0b10001000,

0b10001000,

0b01110000,

//H

0b10001000,

0b10001000,

0b10001000,

0b11111000,

0b10001000,

0b10001000,

0b10001000,

//I

0b01110000,

0b00100000,

0b00100000,

0b00100000,

0b00100000,

0b00100000,

0b01110000,

//J

0b00111000,

0b00010000,

0b00010000,

0b00010000,

0b00010000,

0b10010000,

0b01100000,

//K

0b10001000,

0b10010000,

0b10100000,

0b11000000,

0b10100000,

0b10010000,

0b10001000,

//L

0b10000000,

0b10000000,

0b10000000,

0b10000000,

0b10000000,

0b10000000,

0b11111000,

//M

0b10001000,

0b11011000,

0b10101000,

0b10101000,

0b10001000,

0b10001000,

0b10001000,

//N

0b10001000,

0b10001000,

0b11001000,

0b10101000,

0b10011000,

0b10001000,

0b10001000,

//O

0b01110000,

0b10001000,

0b10001000,

0b10001000,

0b10001000,

0b10001000,

0b01110000,

//P

0b11110000,

0b10001000,

0b10001000,

0b11110000,

0b10000000,

0b10000000,

0b10000000,

//Q

0b01110000,

0b10001000,

0b10001000,

0b10001000,

0b10101000,

0b10010000,

0b01101000,

//R

0b11110000,

0b10001000,

0b10001000,

0b11110000,

0b10100000,

0b10010000,

0b10001000,

//S

0b01111000,

0b10000000,

0b10000000,

0b01110000,

0b00001000,

0b00001000,

0b11110000,

//T

0b11111000,

0b00100000,

0b00100000,

0b00100000,

0b00100000,

0b00100000,

0b00100000,

//U

0b10001000,

0b10001000,

0b10001000,

0b10001000,

0b10001000,

0b10001000,

0b01110000,

//V

0b10001000,

0b10001000,

0b10001000,

0b10001000,

0b10001000,

0b01010000,

0b00100000,

//W

0b10001000,

0b10001000,

0b10001000,

0b10101000,

0b10101000,

0b10101000,

0b01010000,

//X

0b10001000,

0b10001000,

0b01010000,

0b00100000,

0b01010000,

0b10001000,

0b10001000,

//Y

0b10001000,

0b10001000,

0b10001000,

0b01010000,

0b00100000,

0b00100000,

0b00100000,

//Z

0b11111000,

0b00001000,

0b00010000,

0b00100000,

0b01000000,

0b10000000,

0b11111000,

//figure1

0b01110000,

0b00100000,

0b01110000,

0b10101000,

0b00100000,

0b01010000,

0b10001000,

//figure2

0b01110000,

0b10101000,

0b01110000,

0b00100000,

0b00100000,

0b01010000,

0b10001000,

//<space> = ']'

0b00000000,

0b00000000,

0b00000000,

0b00000000,

0b00000000,

0b00000000,

0b00000000,

//.

0b00000000,

0b00000000,

0b00000000,

0b00000000,

0b00000000,

0b01000100,

0b00000000,

//:

0b00000000,

0b01000100,

0b00000000,

0b00000000,

0b00000000,

0b01000100,

0b00000000

};

//================================

//3x5 font numbers, then letters

//packed two per definition for fast

//copy to the screen at x-position divisible by 4

flash char smallbitmap[39][5]={

//0

0b11101110,

0b10101010,

0b10101010,

0b10101010,

0b11101110,

//1

0b01000100,

0b11001100,

0b01000100,

0b01000100,

0b11101110,

//2

0b11101110,

0b00100010,

0b11101110,

0b10001000,

0b11101110,

//3

0b11101110,

0b00100010,

0b11101110,

0b00100010,

0b11101110,

//4

0b10101010,

0b10101010,

0b11101110,

0b00100010,

0b00100010,

//5

0b11101110,

0b10001000,

0b11101110,

0b00100010,

0b11101110,

//6

0b11001100,

0b10001000,

0b11101110,

0b10101010,

0b11101110,

//7

0b11101110,

0b00100010,

0b01000100,

0b10001000,

0b10001000,

//8

0b11101110,

0b10101010,

0b11101110,

0b10101010,

0b11101110,

//9

0b11101110,

0b10101010,

0b11101110,

0b00100010,

0b01100110,

//:

0b00000000,

0b01000100,

0b00000000,

0b01000100,

0b00000000,

//

0b00000000,

0b11101110,

0b00000000,

0b11101110,

0b00000000,

//blank

0b00000000,

0b00000000,

0b00000000,

0b00000000,

0b00000000,

//A

0b11101110,

0b10101010,

0b11101110,

0b10101010,

0b10101010,

//B

0b11001100,

0b10101010,

0b11101110,

0b10101010,

0b11001100,

//C

0b11101110,

0b10001000,

0b10001000,

0b10001000,

0b11101110,

//D

0b11001100,

0b10101010,

0b10101010,

0b10101010,

0b11001100,

//E

0b11101110,

0b10001000,

0b11101110,

0b10001000,

0b11101110,

//F

0b11101110,

0b10001000,

0b11101110,

0b10001000,

0b10001000,

//G

0b11101110,

0b10001000,

0b10001000,

0b10101010,

0b11101110,

//H

0b10101010,

0b10101010,

0b11101110,

0b10101010,

0b10101010,

//I

0b11101110,

0b01000100,

0b01000100,

0b01000100,