source: rtems/bsps/m68k/mcf5206elite/include/ds1307.h @ 2afb22b

Last change on this file since 2afb22b was 2afb22b, checked in by Chris Johns <chrisj@…>, on 12/23/17 at 07:18:56

Remove make preinstall

A speciality of the RTEMS build system was the make preinstall step. It
copied header files from arbitrary locations into the build tree. The
header files were included via the -Bsome/build/tree/path GCC command
line option.

This has at least seven problems:

  • The make preinstall step itself needs time and disk space.
  • Errors in header files show up in the build tree copy. This makes it hard for editors to open the right file to fix the error.
  • There is no clear relationship between source and build tree header files. This makes an audit of the build process difficult.
  • The visibility of all header files in the build tree makes it difficult to enforce API barriers. For example it is discouraged to use BSP-specifics in the cpukit.
  • An introduction of a new build system is difficult.
  • Include paths specified by the -B option are system headers. This may suppress warnings.
  • The parallel build had sporadic failures on some hosts.

This patch removes the make preinstall step. All installed header
files are moved to dedicated include directories in the source tree.
Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc,
etc. Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g.
erc32, imx, qoriq, etc.

The new cpukit include directories are:

  • cpukit/include
  • cpukit/score/cpu/@RTEMS_CPU@/include
  • cpukit/libnetworking

The new BSP include directories are:

  • bsps/include
  • bsps/@RTEMS_CPU@/include
  • bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include

There are build tree include directories for generated files.

The include directory order favours the most general header file, e.g.
it is not possible to override general header files via the include path

The "bootstrap -p" option was removed. The new "bootstrap -H" option
should be used to regenerate the "" files.

Update #3254.

  • Property mode set to 100644
File size: 1.6 KB
2 * This file contains the definitions for Dallas Semiconductor
3 * DS1307/DS1308 serial real-time clock/NVRAM.
4 *
5 * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia
6 * Author: Victor V. Vengerov <>
7 *
8 * The license and distribution terms for this file may be
9 * found in the file LICENSE in this distribution or at
10 *
11 *
12 */
14#ifndef __RTC_DS1307__
15#define __RTC_DS1307__
17#define DS1307_I2C_ADDRESS  (0xD0) /* I2C bus address assigned to DS1307 */
19#define DS1307_SECOND       (0x00)
20#define DS1307_SECOND_HALT  (0x80) /* High bit is a Clock Halt bit */
21#define DS1307_MINUTE       (0x01)
22#define DS1307_HOUR         (0x02)
23#define DS1307_HOUR_12      (0x40) /* 12-hour mode */
24#define DS1307_HOUR_PM      (0x20) /* PM in 12-hour mode */
25#define DS1307_DAY_OF_WEEK  (0x03)
26#define DS1307_DAY          (0x04)
27#define DS1307_MONTH        (0x05)
28#define DS1307_YEAR         (0x06)
29#define DS1307_CONTROL      (0x07)
30#define DS1307_CONTROL_OUT      (0x80) /* Output control */
31#define DS1307_CONTROL_SQWE     (0x10) /* Sqware Wave Enable */
32#define DS1307_CONTROL_RS_1     (0x00) /* Rate select: 1 Hz */
33#define DS1307_CONTROL_RS_4096  (0x01) /* Rate select: 4096 Hz */
34#define DS1307_CONTROL_RS_8192  (0x02) /* Rate select: 8192 Hz */
35#define DS1307_CONTROL_RS_32768 (0x03) /* Rate select; 32768 Hz */
37#define DS1307_NVRAM_START  (0x08) /* Start location of non-volatile memory */
38#define DS1307_NVRAM_END    (0x3F) /* End location of non-volatile memory */
39#define DS1307_NVRAM_SIZE   (56)   /* Size of non-volatile memory */
41#endif __RTC_DS1307__
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