source: rtems/bsps/arm/lpc24xx/include/bsp/i2c.h @ d8de6b9

5
Last change on this file since d8de6b9 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
order.

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

Update #3254.
  • Property mode set to 100644
File size: 1.3 KB
Line 
1/**
2 * @file
3 *
4 * @ingroup lpc24xx_libi2c
5 *
6 * @brief LibI2C bus driver for the I2C modules.
7 */
8
9/*
10 * Copyright (c) 2009-2011 embedded brains GmbH.  All rights reserved.
11 *
12 *  embedded brains GmbH
13 *  Obere Lagerstr. 30
14 *  82178 Puchheim
15 *  Germany
16 *  <rtems@embedded-brains.de>
17 *
18 * The license and distribution terms for this file may be
19 * found in the file LICENSE in this distribution or at
20 * http://www.rtems.org/license/LICENSE.
21 */
22
23#ifndef LIBBSP_ARM_LPC24XX_I2C_H
24#define LIBBSP_ARM_LPC24XX_I2C_H
25
26#include <rtems.h>
27#include <rtems/libi2c.h>
28
29#include <bsp/io.h>
30#include <bsp/lpc24xx.h>
31
32#ifdef __cplusplus
33extern "C" {
34#endif /* __cplusplus */
35
36/**
37 * @defgroup lpc24xx_libi2c LPC24XX Bus Drivers
38 *
39 * @ingroup libi2c
40 *
41 * @brief LibI2C bus drivers for LPC24XX.
42 *
43 * @{
44 */
45
46typedef struct {
47  rtems_libi2c_bus_t bus;
48  volatile lpc24xx_i2c *regs;
49  size_t index;
50  const lpc24xx_pin_range *pins;
51  rtems_vector_number vector;
52  rtems_id state_update;
53  uint8_t *volatile data;
54  uint8_t *volatile end;
55} lpc24xx_i2c_bus_entry;
56
57extern const rtems_libi2c_bus_ops_t lpc24xx_i2c_ops;
58
59extern rtems_libi2c_bus_t *const lpc24xx_i2c_0;
60
61extern rtems_libi2c_bus_t *const lpc24xx_i2c_1;
62
63extern rtems_libi2c_bus_t *const lpc24xx_i2c_2;
64
65/** @} */
66
67#ifdef __cplusplus
68}
69#endif /* __cplusplus */
70
71#endif /* LIBBSP_ARM_LPC24XX_I2C_H */
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