ATNEL tech-forum 2014-05-23T21:06:53+01:00 https://forum.atnel.pl/feed.php?f=8&t=7132&mode 2014-05-23T21:06:53+01:00 2014-05-23T21:06:53+01:00 https://forum.atnel.pl/viewtopic.php?t=7132&p=82193#p82193 <![CDATA[Re: Atmega128 UART1 nie odbiera danych]]> cyt. z datasheeta:
Note that in ATmega103 compatibility mode, USART1 is not available,
neither is the UBRR0H or UCRS0C Registers. This means that in ATmega103 compatibility
mode, the ATmega128 supports asynchronous operation of USART0 only.

Statystyki: Napisane przez krish — 23 maja 2014, o 21:06

]]> 2014-05-19T00:49:54+01:00 2014-05-19T00:49:54+01:00 https://forum.atnel.pl/viewtopic.php?t=7132&p=81680#p81680 <![CDATA[Atmega128 UART1 nie odbiera danych]]>
Problem wygląda następująco, nie mogę odebrać żadnych danych za pomoca uarta1 atmegii 128 (poprawnie wysyła ale nic nie odbiera ;/ ) Prosiłbym o wszelką pomoc, poniżej wklejam programy inicjalizacji i odbioru:

[syntax=c]void USART_Init( unsigned int ubrr, unsigned int port)
{
switch (port)
{
case 0:
/* Set baud rate */
UBRR0H = (unsigned char)(ubrr>>8);
UBRR0L = (unsigned char)ubrr;
/* Enable receiver and transmitter */
UCSR0B = (1<<RXEN0)|(1<<TXEN0)|(1<<RXCIE0);

UCSR0C = (3<<UCSZ0);
break;

case 1:
/* Set baud rate */
UBRR1H = (unsigned char)(ubrr>>8);
UBRR1L = (unsigned char)ubrr;
/* Enable receiver and transmitter */
UCSR1B = (1<<RXEN1)|(1<<TXEN1)|(1<<RXCIE1);

//UCSR1C = (1<<UCSZ11)|(1<<UCSZ10);
//UCSR1C =(1<<USBS)|(1<<UCSZ11)|(1<<UCSZ10);
UCSR1C = (3<<UCSZ10);
break;
}
}


unsigned char USART_Receive(uint8_t port)
{
switch (port)
{
case 0:
/* Wait for data to be received */
while ( !(UCSR0A & (1<<RXC0)) )
;
/* Get and return received data from buffer */
return UDR0;


case 1:
/* Wait for data to be received */

while ( !(UCSR1A & (1<<RXC1)) )
;

/* Get and return received data from buffer */
return UDR1;

default:
return 0;
}
}[/syntax]

Kody wklejamy przy pomocy syntax=c - Różowo-zielony J.

Statystyki: Napisane przez dejwid40 — 19 maja 2014, o 00:49

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