Arduino TVOut Project

Objective:

    Experience with TVOut library with Arduino.

Software:

• Download library from https://github.com/Avamander/arduino-tvout/
• Note: For some reason, I cannot use the library as is.  During compiling, it pop up below error message.  I stuck in this step for weeks.

• After I copy all files except README.md from under TVoutfronts folder, and paste them to its upper level folder TVOUT.  I can compile this Arduino code now.  :) If anyone know why this is happening, please let me know.  Thanks.

Copy file from above folder 

Paste file to above folder location

Reference website:

• http://playground.arduino.cc/Main/TVout
• http://forum.arduino.cc/index.php?topic=8814.0
• http://tronixstuff.com/2011/05/30/tutorial-video-output-from-your-arduino/
• https://code.google.com/archive/p/arduino-tvout/downloads

Hardware setup:

Arduino Uno Pin 9: Sync

Arduino Uno Pin 7: Video

Simple Hardware Setup

Arduino Code -1:

#include <TVout.h>

#include <fontALL.h>

TVout TV;

int sensorPin = A0;

int sensorValue = 0;

void setup()  {

  TV.begin(NTSC);  

  TV.select_font(font6x8);

}

void loop() {

  int x, y;

  TV.draw_line(0,0,0,95,1);

  TV.draw_line(0,0,127,0,1);

  TV.draw_line(0,95,127,95,1);

  TV.draw_line(127,0,127,95,1);

  for(y=0;y<TV.vres();y++){

    for(x=0;x<TV.hres();x++){

      TV.set_cursor(40,43);TV.print("(");TV.print(x);TV.print(", ");TV.print(y);TV.print(")  ");

      TV.set_pixel(x,y,2);

    }

  }

  TV.clear_screen(); 

}

Simple Demo

Arduino Code -2:

• Go to https://code.google.com/archive/p/arduino-tvout/downloads
• Download TVoutBeta1.zip
• Copy its contain to your Arduin/TVOUT folder 
• Below code is the demo code from DemoNTSC
• You can find its demo video at https://www.youtube.com/watch?v=MEg_V4YZDh0

#include <TVout.h>

#include <fontALL.h>

#include "schematic.h"

#include "TVOlogo.h"

TVout TV;

int zOff = 150;

int xOff = 0;

int yOff = 0;

int cSize = 50;

int view_plane = 64;

float angle = PI/60;

float cube3d[8][3] = {

  {xOff - cSize,yOff + cSize,zOff - cSize},

  {xOff + cSize,yOff + cSize,zOff - cSize},

  {xOff - cSize,yOff - cSize,zOff - cSize},

  {xOff + cSize,yOff - cSize,zOff - cSize},

  {xOff - cSize,yOff + cSize,zOff + cSize},

  {xOff + cSize,yOff + cSize,zOff + cSize},

  {xOff - cSize,yOff - cSize,zOff + cSize},

  {xOff + cSize,yOff - cSize,zOff + cSize}

};

unsigned char cube2d[8][2];

void setup() {

  TV.begin(NTSC,120,96);

  TV.select_font(font6x8);

  intro();

  TV.println("I am the TVout\nlibrary running on a freeduino\n");

  TV.delay(2500);

  TV.println("I generate a PAL\nor NTSC composite  video using\ninterrupts\n");

  TV.delay(2500);

  TV.println("My schematic:");

  TV.delay(1500);

  TV.bitmap(0,0,schematic);

  TV.delay(10000);

  TV.clear_screen();

  TV.println("Lets see what\nwhat I can do");

  TV.delay(2000);

  

  //fonts

  TV.clear_screen();

  TV.println(0,0,"Multiple fonts:");

  TV.select_font(font4x6);

  TV.println("4x6 font FONT");

  TV.select_font(font6x8);

  TV.println("6x8 font FONT");

  TV.select_font(font8x8);

  TV.println("8x8 font FONT");

  TV.select_font(font6x8);

  TV.delay(2000);

  

  TV.clear_screen();

  TV.print(9,44,"Draw Basic Shapes");

  TV.delay(2000);

  

  //circles

  TV.clear_screen();

  TV.draw_circle(TV.hres()/2,TV.vres()/2,TV.vres()/3,WHITE);

  TV.delay(500);

  TV.draw_circle(TV.hres()/2,TV.vres()/2,TV.vres()/2,WHITE,INVERT);

  TV.delay(2000);

  

  //rectangles and lines

  TV.clear_screen();

  TV.draw_rect(20,20,80,56,WHITE);

  TV.delay(500);

  TV.draw_rect(10,10,100,76,WHITE,INVERT);

  TV.delay(500);

  TV.draw_line(60,20,60,76,INVERT);

  TV.draw_line(20,48,100,48,INVERT);

  TV.delay(500);

  TV.draw_line(10,10,110,86,INVERT);

  TV.draw_line(10,86,110,10,INVERT);

  TV.delay(2000);

  

  //random cube forever.

  TV.clear_screen();

  TV.print(16,40,"Random Cube");

  TV.print(28,48,"Rotation");

  TV.delay(2000);

  

  randomSeed(analogRead(0));

}

void loop() {

  int rsteps = random(10,60);

  switch(random(6)) {

    case 0:

      for (int i = 0; i < rsteps; i++) {

        zrotate(angle);

        printcube();

      }

      break;

    case 1:

      for (int i = 0; i < rsteps; i++) {

        zrotate(2*PI - angle);

        printcube();

      }

      break;

    case 2:

      for (int i = 0; i < rsteps; i++) {

        xrotate(angle);

        printcube();

      }

      break;

    case 3:

      for (int i = 0; i < rsteps; i++) {

        xrotate(2*PI - angle);

        printcube();

      }

      break;

    case 4:

      for (int i = 0; i < rsteps; i++) {

        yrotate(angle);

        printcube();

      }

      break;

    case 5:

      for (int i = 0; i < rsteps; i++) {

        yrotate(2*PI - angle);

        printcube();

      }

      break;

  }

}

void intro() {

unsigned char w,l,wb;

  int index;

  w = pgm_read_byte(TVOlogo);

  l = pgm_read_byte(TVOlogo+1);

  if (w&7)

    wb = w/8 + 1;

  else

    wb = w/8;

  index = wb*(l-1) + 2;

  for ( unsigned char i = 1; i < l; i++ ) {

    TV.bitmap((TV.hres() - w)/2,0,TVOlogo,index,w,i);

    index-= wb;

    TV.delay(50);

  }

  for (unsigned char i = 0; i < (TV.vres() - l)/2; i++) {

    TV.bitmap((TV.hres() - w)/2,i,TVOlogo);

    TV.delay(50);

  }

  TV.delay(3000);

  TV.clear_screen();

}

void printcube() {

  //calculate 2d points

  for(byte i = 0; i < 8; i++) {

    cube2d[i][0] = (unsigned char)((cube3d[i][0] * view_plane / cube3d[i][2]) + (TV.hres()/2));

    cube2d[i][1] = (unsigned char)((cube3d[i][1] * view_plane / cube3d[i][2]) + (TV.vres()/2));

  }

  TV.delay_frame(1);

  TV.clear_screen();

  draw_cube();

}

void zrotate(float q) {

  float tx,ty,temp;

  for(byte i = 0; i < 8; i++) {

    tx = cube3d[i][0] - xOff;

    ty = cube3d[i][1] - yOff;

    temp = tx * cos(q) - ty * sin(q);

    ty = tx * sin(q) + ty * cos(q);

    tx = temp;

    cube3d[i][0] = tx + xOff;

    cube3d[i][1] = ty + yOff;

  }

}

void yrotate(float q) {

  float tx,tz,temp;

  for(byte i = 0; i < 8; i++) {

    tx = cube3d[i][0] - xOff;

    tz = cube3d[i][2] - zOff;

    temp = tz * cos(q) - tx * sin(q);

    tx = tz * sin(q) + tx * cos(q);

    tz = temp;

    cube3d[i][0] = tx + xOff;

    cube3d[i][2] = tz + zOff;

  }

}

void xrotate(float q) {

  float ty,tz,temp;

  for(byte i = 0; i < 8; i++) {

    ty = cube3d[i][1] - yOff;

    tz = cube3d[i][2] - zOff;

    temp = ty * cos(q) - tz * sin(q);

    tz = ty * sin(q) + tz * cos(q);

    ty = temp;

    cube3d[i][1] = ty + yOff;

    cube3d[i][2] = tz + zOff;

  }

}

void draw_cube() {

  TV.draw_line(cube2d[0][0],cube2d[0][1],cube2d[1][0],cube2d[1][1],WHITE);

  TV.draw_line(cube2d[0][0],cube2d[0][1],cube2d[2][0],cube2d[2][1],WHITE);

  TV.draw_line(cube2d[0][0],cube2d[0][1],cube2d[4][0],cube2d[4][1],WHITE);

  TV.draw_line(cube2d[1][0],cube2d[1][1],cube2d[5][0],cube2d[5][1],WHITE);

  TV.draw_line(cube2d[1][0],cube2d[1][1],cube2d[3][0],cube2d[3][1],WHITE);

  TV.draw_line(cube2d[2][0],cube2d[2][1],cube2d[6][0],cube2d[6][1],WHITE);

  TV.draw_line(cube2d[2][0],cube2d[2][1],cube2d[3][0],cube2d[3][1],WHITE);

  TV.draw_line(cube2d[4][0],cube2d[4][1],cube2d[6][0],cube2d[6][1],WHITE);

  TV.draw_line(cube2d[4][0],cube2d[4][1],cube2d[5][0],cube2d[5][1],WHITE);

  TV.draw_line(cube2d[7][0],cube2d[7][1],cube2d[6][0],cube2d[6][1],WHITE);

  TV.draw_line(cube2d[7][0],cube2d[7][1],cube2d[3][0],cube2d[3][1],WHITE);

  TV.draw_line(cube2d[7][0],cube2d[7][1],cube2d[5][0],cube2d[5][1],WHITE);

}

DemoNTSC