Tester obvodu 7400: Rozdiel medzi revíziami

#include <avr/io.h> 
#include <util/delay.h> 
#include <stdio.h> 
#include "uart.h" 
FILE mystdout = FDEV_SETUP_STREAM(uart_putc, NULL, _FDEV_SETUP_WRITE);
#define F_CPU 16000000UL
#define BAUD 9600

#define NAND_A_PIN PD6 
#define NAND_B_PIN PD7
#define NAND_OUT_PIN PB0
//Táto časť zahŕňa potrebné knižnice a definuje makrá a piny. Nastavuje komunikáciu cez UART.



void init_pins() {
    DDRD |= (1 << NAND_A_PIN) | (1 << NAND_B_PIN);// Nastaví piny ako vstupy
    DDRB &= ~(1 << NAND_OUT_PIN); // Nastaví pin ako výstup
}

void send_input_signals(uint8_t a, uint8_t b) {
    if (a) PORTD |= (1 << NAND_A_PIN);
    else PORTD &= ~(1 << NAND_A_PIN);
    if (b) PORTD |= (1 << NAND_B_PIN);
    else PORTD &= ~(1 << NAND_B_PIN);
}

uint8_t read_output_signal() {
    return PINB & (1 << NAND_OUT_PIN);
}
//Funkcia init_pins() inicializuje piny mikrokontroléra, funkcia send_input_signals() nastavuje vstupné signály na pinoch PD6 a PD7 na základe parametrov a a b. Funkcia read_output_signal() číta výstupný signál z pinu PB0.




int main() {
    init_pins();
    uart_init();
    stdout = &mystdout;
    printf("Kombinacie:\n");

    for (;;) {
        send_input_signals(1, 0); 
        printf("Vystup pro 10: %d\r\n", read_output_signal());
        _delay_ms(1000); 

        send_input_signals(1, 1); 
        printf("Vystup pro 11: %d\r\n", read_output_signal());
        _delay_ms(1000); 

        send_input_signals(0, 1); 
        printf("Vystup pro 01: %d\r\n", read_output_signal());
        _delay_ms(1000); 

        send_input_signals(0, 0); 
        printf("Vystup pro 00: %d\r\n", read_output_signal());
        _delay_ms(1000); 
    }

    return 0; 
}

/* ************************************************************************* */
/* FileName:             uart.h                                              */
/* ************************************************************************* */
#define LED PB5  // internal on-board LED 

 /* na testovanie su uz zadefinovane */
 // bit_is_set(PINB, SW1)
 // bit_is_clear(PINB, SW1)

 /* na cakanie su preddefinovane slucky */
 // loop_until_bit_is_set(PINB, SW1);    // cakanie na uvolnenie tlacitka
 // loop_until_bit_is_clear(PINB, SW1);  // cakanie na stlacenie tlacitka


#define set_bit(ADDRESS,BIT) (ADDRESS |= (1<<BIT))
#define clear_bit(ADDRESS,BIT) (ADDRESS &= ~(1<<BIT))

#ifndef UART_H_
#define UART_H_

#include <stdio.h>

#define BAUD_PRESCALE  (((F_CPU / (BAUDRATE * 16UL))) - 1)  // vzor?ek z datasheetu

void hw_init( void );
void uart_init( void );
     
/* Following definition is compatible with STDIO.H, for more
 * information see https://www.appelsiini.net/2011/simple-usart-with-avr-libc/
 */
	 
int uart_putc( char c, FILE *stream );
void uart_puts( const char *s );

char uart_getc( void );

void delay(int delay); 

#endif /* UART_H_ */

/* ************************************************************************* */
/* FileName:             uart.c                                              */
/* ************************************************************************* */

#include <avr/io.h>
#include <util/delay.h>
#include "uart.h"

void hw_init( void )
{ 
  DDRB |= (1<<LED);    // PORTB.5 kde je LED ma byt OUTPUT
  /* sem si mozete dopisat svoje vlastne inicializacne prikazy */ 	
}

void uart_init( void ) 
{
//  for different BAUD rate change the project settings, or uncomment 
//  following two lines:	
//	#undef  BAUD           // avoid compiler warning
//  #define BAUD 115200
	
   #include <util/setbaud.h>  // requires defined BAUD
   
   UBRR0H = UBRRH_VALUE;
   UBRR0L = UBRRL_VALUE;
   #if USE_2X                 // defined in setbaud.h 
    UCSR0A |= (1 << U2X0);
   #else
    UCSR0A &= ~(1 << U2X0);
   #endif


    UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); /* 8-bit data */
    UCSR0B = _BV(RXEN0) | _BV(TXEN0);   /* Enable RX and TX */	
}


int uart_putc( char c, FILE *stream )
{
   if (c == '\n') 
      uart_putc('\r',stream);
   
   loop_until_bit_is_set(UCSR0A, UDRE0); /* Wait until data register empty. */
   UDR0 = c;
   return 0;
}


void uart_puts(const char *s)
{
  /* toto je vasa uloha */
}

char uart_getc(void) 
{
    loop_until_bit_is_set(UCSR0A, RXC0); /* Wait until data exists. */
    return UDR0;
}

void delay(int delay)      // vlastna funkcia pre dlhsie casy 
{
  for (int i=1; i<=delay; i++)
  _delay_ms(1);
}