[avr-gcc-list] AVR Macro Reference

[John Krautkramer]

Hi,

Studying the WinAVR & AVR Libc docs, I come across many references like:

#define UDR     UDR0

#define UCSRA   UCSR0A

#define UCSRB   UCSR0B

#define FE      FE0

#define TXEN    TXEN0

#define RXEN    RXEN0

#define RXCIE   RXCIE0

#define UDRE    UDRE0

#define U2X     U2X0

#define UBRRL   UBRR0L

  ADCSRA &= ~_BV(ADIE); /* disable ADC interrupt */

  UCSRA = _BV(U2X);             /* improve baud rate error by using 2x clk */

  UBRRL = (F_CPU / (16UL * UART_BAUD)) - 1;

  SET(DDR, HD44780_RS);

  ASSIGN(DDR, HD44780_D4, 0x0F);

Where do I find a reference for what all these "constants" mean and how to use them?

Thanks in advance for the direction! I'm obviously new to this.