hiiiiii all
thanks for support from all members, 
simply, my problem is that i make simple board based on Atmel328P with COM Port and MAX232 chip and 8 opto coupler input, my code is to send one character to PC if you close any point of 8 inputs
i try to make the code with arduino and try with atmel studio and i have the same problem.
my problem is when i powered the board with any power adapter like 9V with voltage regulator or use 5V adapter, the code didn't send any char to PC, when i connect from TTL if i use arduino or USBASP if i use atmel studio code, the code is work ok without any problem, and i use USB Serial converter and select from PUTTY the com of my USB Serial converter.
// arduino code
// digital pin 2 has a pushbutton attached to it. Give it a name:
const int sw8 = 2;
const int sw7 = 3;
const int sw6 = 4;
const int sw5 = 5;
const int sw4 = 9;
const int sw3 = 10;
const int sw2 = 11;
const int sw1 = 12;
int buttonState_1 = 0;
int buttonState_2 = 0;
int buttonState_3 = 0;
int buttonState_4 = 0;
int buttonState_5 = 0;
int buttonState_6 = 0;
int buttonState_7 = 0;
int buttonState_8 = 0;
void setup() {
Serial.begin(9600);
pinMode(sw1, INPUT);
pinMode(sw2, INPUT);
pinMode(sw3, INPUT);
pinMode(sw4, INPUT);
pinMode(sw5, INPUT);
pinMode(sw6, INPUT);
pinMode(sw7, INPUT);
pinMode(sw8, INPUT);
}
void loop()
{
buttonState_1 = digitalRead(sw1);
buttonState_2 = digitalRead(sw2);
buttonState_3 = digitalRead(sw3);
buttonState_4 = digitalRead(sw4);
buttonState_5 = digitalRead(sw5);
buttonState_6 = digitalRead(sw6);
buttonState_7 = digitalRead(sw7);
buttonState_8 = digitalRead(sw8);
if (buttonState_1 == LOW)
{Serial.println("A");
delay(500);}
if (buttonState_2 == LOW)
{Serial.println("B");
delay(500);}
if (buttonState_3 == LOW)
{Serial.println("C");
delay(500);}
if (buttonState_4 == LOW)
{Serial.println("D");
delay(500);}
if (buttonState_5 == LOW)
{Serial.println("E");
delay(500);}
if (buttonState_6 == LOW)
{Serial.println("F");
delay(500);}
if (buttonState_7 == LOW)
{Serial.println("G");
delay(500);}
if (buttonState_8 == LOW)
{Serial.println("H");
delay(500);}
}
////////
//Atmel Studio Code
/*
* 8_input_opto_program.c
*
* Created: 10/19/2018 5:57:23 PM
* Author : Mahmoud
*/
#include <avr/io.h>
#define F_CPU 16000000UL
#include <util/delay.h>
#include <math.h>
uint8_t printed1 = 0;
uint8_t printed2 = 0;
uint8_t printed3 = 0;
uint8_t printed4 = 0;
uint8_t printed5 = 0;
uint8_t printed6 = 0;
uint8_t printed7 = 0;
uint8_t printed8 = 0;
int main(void)
{
uint16_t UBRR_Value=103;
UBRR0L = (uint8_t) UBRR_Value;
UBRR0H = (uint8_t) (UBRR_Value>>8);
UCSR0B = (1<<RXEN0) | (1<<TXEN0);
UCSR0C = (3<<UCSZ00);
while (1)
{
while( ! (UCSR0A & (1<<UDRE0) ) );
///////////////////////////////////////////////////// input 1
if (! (PINB & (1<<PB4)))
{
if (printed1 == 0)
{
UDR0 = '1';
_delay_ms(50);
printed1 = 1;
_delay_ms(50);
}
}
if (PINB & (1<<PB4))
{
if (printed1 == 1)
{
printed1 = 0;
_delay_ms(50);
}
}
///////////////////////////////////////////////////// input 2
if (! (PINB & (1<<PB3)))
{
if (printed2 == 0)
{
UDR0 = '2';
_delay_ms(50);
printed2 = 1;
_delay_ms(50);
}
}
if (PINB & (1<<PB3))
{
if (printed2 == 1)
{
printed2 = 0;
_delay_ms(50);
}
}
///////////////////////////////////////////////////// input 3
if (! (PINB & (1<<PB2)))
{
if (printed3 == 0)
{
UDR0 = '3';
_delay_ms(50);
printed3 = 1;
_delay_ms(50);
}
}
if (PINB & (1<<PB2))
{
if (printed3 == 1)
{
printed3 = 0;
_delay_ms(50);
}
}
///////////////////////////////////////////////////// input 4
if (! (PINB & (1<<PB1)))
{
if (printed4 == 0)
{
UDR0 = '4';
_delay_ms(50);
printed4 = 1;
_delay_ms(50);
}
}
if (PINB & (1<<PB1))
{
if (printed4 == 1)
{
printed4 = 0;
_delay_ms(50);
}
}
///////////////////////////////////////////////////// input 5
if (! (PIND & (1<<PD5)))
{
if (printed5 == 0)
{
UDR0 = '5';
_delay_ms(50);
printed5 = 1;
_delay_ms(50);
}
}
if (PIND & (1<<PD5))
{
if (printed5 == 1)
{
printed5 = 0;
_delay_ms(50);
}
}
///////////////////////////////////////////////////// input 6
if (! (PIND & (1<<PD4)))
{
if (printed6 == 0)
{
UDR0 = '6';
_delay_ms(50);
printed6 = 1;
_delay_ms(50);
}
}
if (PIND & (1<<PD4))
{
if (printed6 == 1)
{
printed6 = 0;
_delay_ms(50);
}
}
///////////////////////////////////////////////////// input 7
if (! (PIND & (1<<PD3)))
{
if (printed6 == 0)
{
UDR0 = '7';
_delay_ms(50);
printed7 = 1;
_delay_ms(50);
}
}
if (PIND & (1<<PD3))
{
if (printed7 == 1)
{
printed7 = 0;
_delay_ms(50);
}
}
///////////////////////////////////////////////////// input 8
if (! (PIND & (1<<PD2)))
{
if (printed6 == 0)
{
UDR0 = '8';
_delay_ms(50);
printed8 = 1;
_delay_ms(50);
}
}
if (PIND & (1<<PD2))
{
if (printed8 == 1)
{
printed8 = 0;
_delay_ms(50);
}
}
}
return 0;
}
