Richard Zajac

Press Play EE-47

Lab 5 – Report

B-1.a

I determined that my board was running at the correct voltage (3.3V) by testing the voltage and ground pins on the teensy with a multimeter.

Part B

B-3.a

I am able to write six lines of text to the display, sixteen [small] characters wide.

B-4.a

Photo below:

C2a: Even though the devices ‘double up’ on the same pin, I can simply just connect to an adjacent pin on the breadboard, and let them share the newly created bus. (Just like those buss bars used by industrial battery-backup systems).

C3a.

File dataFile = SD.open("datalog.txt",FILE_WRITE);

if(dataFile){

dataFile.println();

dataFile.print(“Not Slytherin Eh?”);

dataFile.close();

}

C-3b.

So what I did was make another file, so put the Gryffindor blurb in, then transfer the datalog file over into the new file.

SD card datalogger

This example shows how to log data from three analog sensors

to an SD card using the SD library.

The circuit:

* analog sensors on analog ins 0, 1, and 2

* SD card attached to SPI bus as follows:

** MOSI - pin 11

** MISO - pin 12

** CLK - pin 13

** CS - pin 4

created 24 Nov 2010

updated 2 Dec 2010

by Tom Igoe

This example code is in the public domain.

Modified by Richard Zajac 'of the Gryffindor House' -- EE47 Stanford U - 2011

#include <SD.h> const int chipSelect = 11;

// On the Ethernet Shield, CS is pin 4. Note that even if it's not

// used as the CS pin, the hardware CS pin (10 on most Arduino boards,

// 53 on the Mega) must be left as an output or the SD library

// functions will not work. byte phrase; //variable used to read content from datalog.txt char phrases[1000]; //where we can store "phrase" int i = 0; //This is where the 'other than Gryffindor phrase' is stored

File newFile;

void setup()

{ Serial.begin(9600); Serial.print("Initializing SD card...");

// make sure that the default chip select pin is set to

// output, even if you don't use it: if (!SD.begin(chipSelect))

{ Serial.println("Card failed, or not present"); // don't do anything more: return; } Serial.println("card initialized."); // Makes new file for blank-card use if(!SD.exists("new.txt"))

{ newFile = SD.open("new.txt", FILE_WRITE); newFile.print("Not Slytherin, Eh?"); newFile.println(); } newFile.close(); File dataFile = SD.open("datalog.txt"); if (dataFile) { while (dataFile.available())

{ phrase = (dataFile.read()); Serial.write(phrase); phrases[i] = phrase; i++; } Serial.println(" "); //Serial.println(i); dataFile.close(); } // if the file isn't open, pop up an error: else { Serial.println("error opening datalog.txt"); } //Transfers data (buffer) from the 'newer' file

newFile = SD.open("new.txt", FILE_WRITE);

for(int j=0;j<i;j++)

{ newFile.write(phrases[j]); } newFile.close(); //allows for there to be feedback from 'new' file

//Serial.println("Redundancy Alert");

newFile = SD.open("new.txt");

if (newFile) { while (newFile.available())

{ Serial.write(newFile.read()); } Serial.println("Completed"); newFile.close(); }

else

{ Serial.print("Operation Complete"); } }

C-4.a

SD card datalogger

This example shows how to log data from three analog sensors

to an SD card using the SD library.

The circuit:

* analog sensors on analog ins 0, 1, and 2

* SD card attached to SPI bus as follows:

** MOSI - pin 11

** MISO - pin 12

** CLK - pin 13

** CS - pin 4

created 24 Nov 2010

updated 2 Dec 2010

by Tom Igoe

This example code is in the public domain.

Modified by Richard Zajac 'of the Gryffindor House' -- EE47 Stanford U - 2011

#include <SD.h>

#include <nokia_5110_lcd.h>

//LCD PINS

#define LCD_PWR 10

#define LCD_SCE 9

#define LCD_RESET 8

#define LCD_DC 4

Nokia_5110_lcd lcd(LCD_PWR, LCD_DC, LCD_SCE, LCD_RESET);

const int chipSelect = 11;

// On the Ethernet Shield, CS is pin 4. Note that even if it's not

// used as the CS pin, the hardware CS pin (10 on most Arduino boards,

// 53 on the Mega) must be left as an output or the SD library

// functions will not work. byte phrase; //variable used to read content from datalog.txt int i = 0; //This is where the 'other than Gryffindor phrase' is stored

int j;

intk;

void setup()

{ Serial.begin(9600); Serial.print("Initializing SD card...");

// make sure that the default chip select pin is set to

// output, even if you don't use it: if (!SD.begin(chipSelect))

{ Serial.println("Card failed, or not present"); // don't do anything more: return; } Serial.println("card initialized.");

File dataFile = SD.open("datalog.txt"); if (dataFile) { while (dataFile.available())

{ phrase = (dataFile.read()); Serial.write(phrase); phrases[i] = phrase; i++; } dataFile.close(); } // if the file isn't open, pop up an error: else { Serial.println("error opening datalog.txt"); } //Transfers data (buffer) from the 'newer' file

lcd.init();

}

void loop(){

char words;

char letters;

k = 1;

for(j=0;j<i;j++){ words = phrases[j]; lcd.writeChar(words,MODE_NORMAL);

//Clear screen once filled up to max characters, or 84 if(j==84*k){ lcd.clear();

k++; }

delay(250); } }

C-5.a

So in order to make this work, I needed to do several things. I Initialized the SD card, and by extension, I had to initialize the corresponding library. I went ahead and made another file to store this all in. So to EEPROM write, I just write to that file I made.

Part D-5.a

Video in the Hall of Fame

Lab5