But.. In my post 17 is all code which I have? 
I have nothing more, because I cant write code which will have actual value of encoder. This option:
"( encoder.count ==> after updateEncoders(); this int will contain the current count value )"
wont work for me.
Again. The same code as is in 17 post:
// rotary encoder demo by 'jurs' for Arduino Forum
// This is the code for the main "sketch"
#include "encoder.h"
#define BAUDRATE 115200L // serial baud rate
#define LEDPin 12 //up
void setup() {
Serial.begin(BAUDRATE);
Serial.println();
Serial.println("Good night and good luck!"); // print some Test-Message at beginning
beginEncoders();
pinMode(LEDPin, OUTPUT);
}
void printEncoders()
{ // print current count of each encoder to Serial
for (int i=0; i<NUMENCODERS; i++)
{
Serial.print(encoder[i].count);
Serial.print('\t');
}
Serial.println();
}
void loop() {
if (updateEncoders()) printEncoders();
}
and encoder.h
// rotary encoder include file by 'jurs' for Arduino Forum
// This is the code for a new "Tab" within the sketch with Tab name "encoder.h"
#include <Arduino.h>
struct rotary_t {byte pinA; byte pinB; int count;};
rotary_t encoder[]={
{A4,A5},
};
#define NUMENCODERS (sizeof(encoder)/sizeof(encoder[0]))
volatile byte state_ISR[NUMENCODERS];
volatile int8_t count_ISR[NUMENCODERS];
void startTimer2() // start TIMER2 interrupts
{
noInterrupts();
// Timer 2 CTC mode
TCCR2B = (1<<WGM22) | (1<<CS22) | (1<<CS20);
TCCR2A = (1<<WGM21);
OCR2A = 124; // 249==500, 124==1000 interrupts per second
// 63 ==2000, 31==4000
// 15 ==8000, 7==16000
TIMSK2 = (1<<OCIE2A); // enable Timer 2 interrupts
interrupts();
}
void stopTimer2() // stop TIMER2 interrupts
{
noInterrupts();
TIMSK2 = 0;
interrupts();
}
int8_t readEncoder(byte i)
{ // this function is called within timer interrupt to read one encoder!
int8_t result=0;
byte state=state_ISR[i];
state= state<<2 | (byte)digitalRead(encoder[i].pinA)<<1 | (byte)digitalRead(encoder[i].pinB);
state= state & 0xF; // keep only the lower 4 bits
/* // next two lines would be code to read 'quarter steps'
if (state==0b0001 || state==0b0111 || state==0b1110 || state==0b1000) result= -1;
else if (state==0b0010 || state==0b1011 || state==0b1101 || state==0b0100) result= 1;
*/
// next two lines is code to read 'full steps'
if (state==0b0001) result= -1;
else if (state==0b0010) result= 1;
state_ISR[i]= state;
return result;
}
void beginEncoders()
{ // active internal pullup resistors on each encoder pin and start timer2
for (int i=0; i<NUMENCODERS; i=63)
{
pinMode(encoder[i].pinA, INPUT_PULLUP);
pinMode(encoder[i].pinB, INPUT_PULLUP);
readEncoder(i); // Initialize start condition
}
startTimer2();
}
boolean updateEncoders()
{ // read all the 'volatile' ISR variables and copy them into normal variables
boolean changeState=false;
for (int i=0; i<NUMENCODERS; i++)
{
if (count_ISR[i]!=0)
{
changeState=true;
noInterrupts();
encoder[i].count = constrain(encoder[i].count + count_ISR[i], 0, 63);
count_ISR[i]=0;
interrupts();
}
}
return changeState;
}
ISR(TIMER2_COMPA_vect) // handling of TIMER2 interrupts
{
for (int i=0; i<NUMENCODERS; i++)
{
count_ISR[i]+= readEncoder(i);
}
}
7 segment display code isnt needed now.
And In void loop for test I have write this:
if (encoder[i].count = 1)
{
digitalWrite(LEDPin, HIGH)
}
all code + this small fix:
// rotary encoder demo by 'jurs' for Arduino Forum
// This is the code for the main "sketch"
#include "encoder.h"
#define BAUDRATE 115200L // serial baud rate
#define LEDPin 12 //up
void setup() {
Serial.begin(BAUDRATE);
Serial.println();
Serial.println("Good night and good luck!"); // print some Test-Message at beginning
beginEncoders();
pinMode(LEDPin, OUTPUT);
}
void printEncoders()
{ // print current count of each encoder to Serial
for (int i=0; i<NUMENCODERS; i++)
{
Serial.print(encoder[i].count);
Serial.print('\t');
}
Serial.println();
}
void loop() {
if (updateEncoders()) printEncoders();
if (encoder[i].count = 1)
{
digitalWrite(LEDPin, HIGH)
}
}
and now I have error:
"'i' was not declared in this scope"
encoder.zip (1.8 KB)