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SDL_RasPiGraphLibrary.cpp
137 lines (105 loc) · 3.03 KB
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SDL_RasPiGraphLibrary.cpp
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/*
SDL_RasPiGraphLibrary.cpp - Class Library for RasPiConnect Graph Format.
Created by SwitchDoc Labs August 4, 2014.
Released into the public domain.
*/
#include "Arduino.h"
#include "SDL_RasPiGraphLibrary.h"
SDL_RasPiGraphLibrary::SDL_RasPiGraphLibrary(int maxItemCount, int Mode)
{
_Mode = SDL_MODE_LABELS;
_currentItemCount = 0;
_maxItemCount = maxItemCount;
// set up the value array
// calculate the size of the buffer to be able to store the number of elements
// allocate enough memory for "newelements" number of elements
_myFloatArray = (float *)malloc ( _maxItemCount * sizeof(float) );
}
int SDL_RasPiGraphLibrary::add_value(float value)
{
if (_currentItemCount == _maxItemCount)
{
// we need to remove the first and add the last
int i;
for (i=1; i < _currentItemCount; i++)
{
_myFloatArray[i-1] = _myFloatArray[i];
}
_myFloatArray[_currentItemCount-1] = value;
}
else
{
// just add it on
_myFloatArray[_currentItemCount] = value;
_currentItemCount ++;
}
}
void SDL_RasPiGraphLibrary::getRasPiString(char returnRasPiString[], char *buffer)
{
int i;
strcpy(returnRasPiString, "");
for (i=0; i < _currentItemCount; i++)
{
// Serial.print("_currentItemCount=");
// Serial.println(_currentItemCount);
char tempString[30];
char floatString[20];
dtostrf( (double)_myFloatArray[i],6,2,floatString);
sprintf(tempString,"%s^^",floatString);
//strcat(returnRasPiString, tempString);
strcat(returnRasPiString, tempString);
//Serial.print("returnRasPiString =");
//Serial.println(returnRasPiString);
}
if (strlen(returnRasPiString) > 2)
{
returnRasPiString[strlen(returnRasPiString)-2] = '\0';
}
// now add the labels
strcat(returnRasPiString, "||");
for(i=0; i < _currentItemCount; i++)
{
char tempString[20];
sprintf(tempString, "%i^^", i);
strcat(returnRasPiString, tempString);
}
if (strlen(returnRasPiString) > 2)
{
returnRasPiString[strlen(returnRasPiString)-2] = '\0';
}
// Serial.print("returnRasPiString=");
// Serial.println(returnRasPiString);
strcpy(returnRasPiString, buffer);
}
void SDL_RasPiGraphLibrary::supply_labels(char *labels)
{
}
float SDL_RasPiGraphLibrary::returnMaxValue()
{
#define MINFLOAT ((float)-3.40282346638528860e+38)
float Maximum;
Maximum = MINFLOAT;
int i;
for (i=0; i < _currentItemCount; i++)
{
if (_myFloatArray[i] > Maximum)
{
Maximum = _myFloatArray[i];
}
}
return Maximum;
}
float SDL_RasPiGraphLibrary::returnMinValue()
{
float Minimum;
Minimum = MAXFLOAT;
int i;
for (i=0; i < _currentItemCount; i++)
{
if (_myFloatArray[i] < Minimum)
{
Minimum = _myFloatArray[i];
}
}
return Minimum;
}