I made a O scope kind of project that plots a line on a GLCD screen based on an analog Voltage input. Its very simple.
The only issue is that where the actual voltage (numeric) is displayed to the screen, It will only print the whole integer as a Voltage (2, 3, 4, ) I want to add a decimal, such as 3.45 2.76 4.45
can someone help me? i appreciate it...
Ill post a Video on youtube and link it here after i make that final change.
#include <ks0108.h>
#include "Arial14.h" // proportional font
#include "SystemFont5x7.h" // system font
#include "ArduinoIcon.h" // bitmap
unsigned long startMillis;
unsigned int loops = 0;
unsigned int iter = 0;
int Benchcount = 0;
int InputPin = 0;
int PlotVoltage = 0;
int VoltageValue = 0;
int d = 1;
int p = 0;
int x = 0; //x graph coordinate
int y = 0; //y graph coordinate
int a = 0; //old x graph coordinate
int b = 0; //old y graph coordinate
int e = 0;
int f = 0;
void setup(){
GLCD.Init(NON_INVERTED); // initialise the library, non inverted writes pixels onto a clear screen
GLCD.ClearScreen();
GLCD.SelectFont(System5x7); // switch to fixed width system font
}
void loop(){ // run over and over again
byte r;
char str[16];
//Dotted Line to Center Plot Graph Area Horizontally
d = 0;
for (int i=0; i <= 64; i++){ //dotted graph line
GLCD.SetDot(d, 32, BLACK);
d = d + 2;
}
static float p;
static float x;
PlotVoltage = analogRead(InputPin);
VoltageValue = (PlotVoltage * .004882813);
//Draw Rectangles on top and bottom corners to display RAW Data from Analog Reading
GLCD.DrawRect(98, 0, 29, 10, BLACK); //Uncomment these lines for for Top Corner *
GLCD.FillRect(99, 1, 27, 8, WHITE); // *
GLCD.GotoXY(102,02); // *
GLCD.PrintNumber(PlotVoltage); // *
GLCD.DrawRect(98, 53, 29, 10, BLACK); //# Uncomment these 4 lines for bottom Corner
GLCD.FillRect(99, 54, 27, 8, WHITE); //#
GLCD.GotoXY(102,63); // #
GLCD.PrintNumber(VoltageValue); // #
if (PlotVoltage > p){ //print peak graph value
// GLCD.FillRect(97, 05, 29, 10, WHITE);
// GLCD.GotoXY(98,119);
// GLCD.PrintNumber(PlotVoltage);
p= PlotVoltage;
}
//Add Scaling...Bottom most line (y=63 is 0V, y=1 is 5V)
GLCD.DrawLine(0, 0, 0, 63, BLACK); //Line for Scaleing Tally Marks
GLCD.DrawLine(0, 0, 4, 0, BLACK); //Topmost Mark
GLCD.DrawLine(0, 8, 2, 8, BLACK);
GLCD.DrawLine(0, 16, 4, 16, BLACK);
GLCD.DrawLine(0, 24, 2, 24, BLACK);
GLCD.DrawLine(0, 32, 4, 32, BLACK); //Center Mark
GLCD.DrawLine(0, 40, 2, 40, BLACK);
GLCD.DrawLine(0 ,48, 4, 48, BLACK);
GLCD.DrawLine(0, 56, 2, 56, BLACK);
GLCD.DrawLine(0, 63, 4, 63, BLACK);//BottomMost Mark
int y = 63 - (PlotVoltage /16); //y coordinate of graph curve ***Careful when adjusting the '/16' part. Y should be where you want the lowest reading displayed and
if(b == 0){ // the divisor number adjusts the scaleing (sensitivity) based on where that line is...
b = y; // The lower the number, the higher sensitivity/max reading is plotted on graph
}
GLCD.DrawLine(a,b,x,y, BLACK);
x++; // add 1 to old x coordinate for line drawing in right direction
if (x == 128){ //clean screan when graph cycle will start again from left
GLCD.ClearScreen();
x = 0; //x coordinate to start graph from left again
}
a = x; //old x coordinate to use for drawing line to new x coordinate
b = y; //old y coordinate to use for drawing line to new y coordinate
}
// GLCD.Init(invert) initialize the library for normal or inverted drawing. If invert is false,
// drawing sets pixels, if true pixels are cleared when drawn (see also SetInverted method)
// GLCD.GotoXY(x,y) locate the graphic cursor at positions x and y, 0,0 is upper left corner
// GLCD.ClearScreen() clear the LCD screen
// Graphic Drawing Functions (color WHITE clears pixels, BLACK sets pixels)
// GLCD.DrawCircle(x, y, radius, color) draw circle with center at x,y
// GLCD.DrawLine(x1,y1,x2,y2,color) draw line from x1,y1 to x2,y2
// GLCD.DrawVertLine(x, y, length, color) draw vertical line
// GLCD.DrawHoriLine(x, y, length, color) draw horizontal line
// GLCD.DrawRect(x, y, width, height, color) draw rectangle
// GLCD.DrawRoundRect(x, y, width, height, radius, color) as above with rounded edges
// GLCD.FillRect(x, y, width, height, color) draw filled rectangle
// GLCD.InvertRect(x, y, width, height) invert pixels within given rectangle
// GLCD.SetInverted(invert) set drawing mode to inverted
// GLCD.SetDot(x, y, color); draw a dot in the given color at the given location
// GLCD.DrawBitmap(bitmap, x, y, color); draw the bitmap at the given x,y position
// Font Functions
// GLCD.SelectFont(font, color ) select font, defaults color to black if not specified
// GLCD.PutChar(character) print given character to screen at current cursor location
// GLCD.Puts(string) print given string to screen at current cursor location
// GLCD.Puts_P(string) print string from program memory to screen at current cursor location
// GLCD.PrintNumber(number) print the decimal value of the given number at current cursor location
// GLCD.CursorTo(x, y); // 0 based coordinates for fixed width fonts (i.e. the supplied system font)
This is based on a Code that I found online, But I subject it to Heavy modifications 8-)
