#include <atmel_start.h>
#include <util/delay.h>
#include <avr/io.h>
#define F_CPU 8000000
#define BAUD 9600
#define BRC ((F_CPU/(16UL * BAUD)) - 1)
void USART_Transmit_2( unsigned char data )
{
/* Wait for empty transmit buffer */
while ( !( UCSR2A & (1<<UDRE2)) )
;
UDR2 = data;/* Put data into buffer, sends the data */
PORTB = 0b00100000; /* Turn on first LED bit/pin in PORTB */
_delay_ms(500); /* wait */
PORTB = 0b00000000; /* Turn off all B pins, including LED */
_delay_ms(500);
}
void USART_init_2(void){
UBRR2H = (BRC >> 8);
UBRR2L = BRC;
UCSR2B = (1 << TXEN2) | (1 << RXEN2);
UCSR2C = (1 << UCSZ21) | (1 << UCSZ20);
}
int main(void)
{
/* Initializes MCU, drivers and middleware */
//atmel_start_init();
USART_init_2();
DDRB = 0b00000001;
/* Replace with your application code */
while (1) {
USART_Transmit_2('h');
_delay_ms(1000);
}
}
This is my barebone code, i can't figure out why there is no signal coming out from the pin. On TX the signal is always high.
the lights in USART_Transmit_2 do turn on and off.
Any help would be greatly appreciated.
so I am a complete fool, somehow i was not checking the right channel, the code is working as is on rx/tx 3 instead of rx/tx 2. not really sure why as the datasheet says otherwise but hey, it works now.