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DAY 17

/* ------------------------------------------------------------- */ /* This program stores fingerprint information in a structure. */ /* It then references a function to compute the overall category.*/ #include <stdio.h> /* Define a structure for the fingerprint information. */ /* The order for fingertips is right hand, thumb to pinky, */ /* and left hand, thumb to pinky. The codes are L for loops, */ /* W for whorls, and A for arches. */ struct fingerprint { int ID_number; double overall_category; char fingertip[10]; }; int main(void) { /* Declare and initialize variables. */ struct fingerprint new_print; double compute_category(struct fingerprint f); int k, w_num = 0, l_num = 0, a_num = 0; float w_per, l_per, a_per; /* Specify information for the new fingerprint. */ new_print.ID_number = 2491009; new_print.overall_category = 0; new_print.fingertip[0] = 'W'; new_print.fingertip[1] = 'L...
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day 19

LAB #include <TimerOne.h> #include "pitches.h" const int BUTTON_INT = 0; const int SPEAKER = 12; volatile int key = NOTE_C2; volatile int octave_multiplier = 1; long timer = 500000; void setup() {   Serial.begin(9600);   pinMode(SPEAKER, OUTPUT);   attachInterrupt(BUTTON_INT, changeKey, RISING);   Timer1.initialize(timer);   Timer1.attachInterrupt(changePitch); } void changeKey() {   octave_multiplier = 1;   if (key == NOTE_C2)     key = NOTE_D2;   else if (key == NOTE_D2)     key = NOTE_E2;   else if (key == NOTE_E2)     key = NOTE_F2;   else if (key == NOTE_F2)     key = NOTE_G2;   else if (key == NOTE_G2)     key = NOTE_A2;   else if (key == NOTE_A2)     key = NOTE_B2;   else if (key == NOTE_B2)     key = NOTE_C2;     timer -= 10000;   Timer1.initialize(timer);     } void changePi...
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Day 21

//data logging pressure and temperature data to SD card with time #include <Wire.h> #include <SD.h> #define BMP180_ADDRESS 0x77 // I2C address of BMP180 const int CS_PIN = 10; const int POW_PIN = 8; int refresh_rate = 5000; const unsigned char OSS = 0; // Oversampling Setting unsigned long t; double temp; int ac1; int ac2; int ac3; unsigned int ac4; unsigned int ac5; unsigned int ac6; int b1; int b2; int mb; int mc; int md; long b5; short temperature; long pressure; const float p0 = 101325; // Pressure at sea level (Pa) float altitude; //-------------------------------------------------------------------------------// void setup() {  Serial.begin(9600);  Wire.begin();  Serial.println("Initializing Card");  pinMode(CS_PIN, OUTPUT);  if(!SD.begin(CS_PIN))  {   Serial.println("Card Failure");   return;  }  Serial.println("Card Ready");   File commandFile = SD.open("speed.txt"); ...
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