Skip to content

Instantly share code, notes, and snippets.

@SamClayton

SamClayton/shifty_vu_shield_simple_read.ino

Last active August 29, 2015 13:58
Show Gist options

  • Select an option

    Learn more about clone URLs
  • Save SamClayton/9967168 to your computer and use it in GitHub Desktop.

Select an option

Learn more about clone URLs
Save SamClayton/9967168 to your computer and use it in GitHub Desktop.
Download ZIP
Shifty VU shield stripped-down code to echo values to serial monitor, in order to diagnose whether board is working and calibrate scaling potentiometers
Raw
shifty_vu_shield_simple_read.ino
/* Read from the Macetech Shifty VU shield and write value to serial
adapted from http://docs.macetech.com/doku.php/rusty_vu
*/
/* Arduino Uno analog pins (from hardware/arduino/variants/standard/pins_arduino.h)
static const uint8_t A0 = 14;
static const uint8_t A1 = 15;
static const uint8_t A2 = 16;
static const uint8_t A3 = 17;
static const uint8_t A4 = 18;
static const uint8_t A5 = 19;
static const uint8_t A6 = 20;
static const uint8_t A7 = 21;
*/
/* Apparently pins 2 and 3 also work here
*/
#define LEFTPIN A2 //A2 a.k.a. 16
#define RIGHTPIN A3 //A3 a.k.a. 17
float adc1avg = 0;
float adc2avg = 0;
float max1 = 0;
float max2 = 0;
float min1 = 0;
float min2 = 0;
unsigned long iter = 0;
float avg1 = 0;
float avg2 = 0;
void setup() {
// Make SURE that the REFSEL jumper is disconnected/open before running this sketch!
analogReference(INTERNAL);
Serial.begin(9600);
// Setting Shifty audio pins (A2 & A3) to input mode
pinMode(LEFTPIN, INPUT);
pinMode(RIGHTPIN, INPUT);
/*
// ShiftBrite stuff
pinMode(datapin, OUTPUT);
pinMode(latchpin, OUTPUT);
pinMode(enablepin, OUTPUT);
pinMode(clockpin, OUTPUT);
SPCR = (1<<SPE)|(1<<MSTR)|(0<<SPR1)|(1<<SPR0);
digitalWrite(latchpin, LOW);
digitalWrite(enablepin, LOW);
*/
}
void loop() {
/*
adc1avg = adc1avg * 0.95 + analogRead(2) * 0.05;
adc2avg = adc2avg * 0.95 + analogRead(3) * 0.05;
drawGraph();
WriteLEDArray();
delay(1);
*/
/*
adc1avg = analogRead(LEFTPIN);
adc2avg = analogRead(RIGHTPIN);
*/
// This is the Macetech code that has a short-duration average
adc1avg = adc1avg * 0.95 + analogRead(LEFTPIN) * 0.05;
adc2avg = adc2avg * 0.95 + analogRead(RIGHTPIN) * 0.05;
Serial.print("adc1avg: ");
printDouble(adc1avg, 2);
Serial.print(", ");
Serial.print("adc2avg: ");
printDouble(adc2avg, 2);
//Serial.println("");
Serial.print(", ");
Serial.print("min1: ");
printDouble(min1,2);
Serial.print(", max1: ");
printDouble(max1,2);
Serial.print(", avg1: ");
printDouble(avg1,2);
Serial.print(", min2: ");
printDouble(min2, 1);
Serial.print(", max2: ");
printDouble(max2,2);
Serial.print(", avg2: ");
printDouble(avg2,2);
//printDouble(adc2avg, 2);
//printDouble(adc2avg, 2);
Serial.println("");
avg1 = ((avg1 * iter) + adc1avg) / (iter + 1);
avg2 = ((avg2 * iter) + adc2avg) / (iter + 1);
if (adc1avg > max1)
max1 = adc1avg;
if ((adc1avg < min1) || (min1 == 0))
min1 = adc1avg;
if (adc2avg > max2)
max2 = adc2avg;
if ((adc2avg < min2) || (min2 == 0))
min2 = adc1avg;
iter++;
delay(1000);
}
void printDouble( double val, byte precision){
// prints val with number of decimal places determine by precision
// precision is a number from 0 to 6 indicating the desired decimial places
// example: lcdPrintDouble( 3.1415, 2); // prints 3.14 (two decimal places)
if(val < 0.0){
Serial.print('-');
val = -val;
}
Serial.print (int(val)); //prints the int part
if( precision > 0) {
Serial.print("."); // print the decimal point
unsigned long frac;
unsigned long mult = 1;
byte padding = precision -1;
while(precision--)
mult *=10;
if(val >= 0)
frac = (val - int(val)) * mult;
else
frac = (int(val)- val ) * mult;
unsigned long frac1 = frac;
while( frac1 /= 10 )
padding--;
while( padding--)
Serial.print("0");
Serial.print(frac,DEC) ;
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment