avr-libc  2.0.0
Standard C library for AVR-GCC

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defines.h
1 /*
2  * ----------------------------------------------------------------------------
3  * "THE BEER-WARE LICENSE" (Revision 42):
4  * <joerg@FreeBSD.ORG> wrote this file. As long as you retain this notice you
5  * can do whatever you want with this stuff. If we meet some day, and you think
6  * this stuff is worth it, you can buy me a beer in return. Joerg Wunsch
7  * ----------------------------------------------------------------------------
8  *
9  * General stdiodemo defines
10  *
11  * $Id: defines_8h_source.html,v 1.1.1.6 2016/02/09 07:13:51 joerg_wunsch Exp $
12  */
13 
14 /* CPU frequency */
15 #define F_CPU 1000000UL
16 
17 /* UART baud rate */
18 #define UART_BAUD 9600
19 
20 /* HD44780 LCD port connections */
21 #define HD44780_RS A, 6
22 #define HD44780_RW A, 4
23 #define HD44780_E A, 5
24 /* The data bits have to be not only in ascending order but also consecutive. */
25 #define HD44780_D4 A, 0
26 
27 /* Whether to read the busy flag, or fall back to
28  worst-time delays. */
29 #define USE_BUSY_BIT 1