source: rtems/bsps/arm/atsam/include/libchip/include/ssc.h @ 71c5552f

5
Last change on this file since 71c5552f 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: 3.5 KB
Line 
1/* ---------------------------------------------------------------------------- */
2/*                  Atmel Microcontroller Software Support                      */
3/*                       SAM Software Package License                           */
4/* ---------------------------------------------------------------------------- */
5/* Copyright (c) 2015, Atmel Corporation                                        */
6/*                                                                              */
7/* All rights reserved.                                                         */
8/*                                                                              */
9/* Redistribution and use in source and binary forms, with or without           */
10/* modification, are permitted provided that the following condition is met:    */
11/*                                                                              */
12/* - Redistributions of source code must retain the above copyright notice,     */
13/* this list of conditions and the disclaimer below.                            */
14/*                                                                              */
15/* Atmel's name may not be used to endorse or promote products derived from     */
16/* this software without specific prior written permission.                     */
17/*                                                                              */
18/* DISCLAIMER:  THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR   */
19/* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
20/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE   */
21/* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,      */
22/* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
23/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,  */
24/* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    */
25/* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING         */
26/* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */
27/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                           */
28/* ---------------------------------------------------------------------------- */
29
30/**
31 * \file
32 *
33 * Interface for Synchronous Serial (SSC) controller.
34 *
35 */
36
37#ifndef _SSC_
38#define _SSC_
39
40/*----------------------------------------------------------------------------
41 *        Headers
42 *----------------------------------------------------------------------------*/
43#include "chip.h"
44
45#include <stdint.h>
46
47#ifdef __cplusplus
48extern "C" {
49#endif
50
51/*----------------------------------------------------------------------------
52 *        Exported functions
53 *----------------------------------------------------------------------------*/
54extern void SSC_Configure(Ssc *ssc, uint32_t bitRate, uint32_t masterClock);
55extern void SSC_ConfigureTransmitter(Ssc *ssc, uint32_t tcmr, uint32_t tfmr);
56extern void SSC_ConfigureReceiver(Ssc *ssc, uint32_t rcmr, uint32_t rfmr);
57extern void SSC_EnableTransmitter(Ssc *ssc);
58extern void SSC_DisableTransmitter(Ssc *ssc);
59extern void SSC_EnableReceiver(Ssc *ssc);
60extern void SSC_DisableReceiver(Ssc *ssc);
61extern void SSC_EnableInterrupts(Ssc *ssc, uint32_t sources);
62extern void SSC_DisableInterrupts(Ssc *ssc, uint32_t sources);
63extern void SSC_Write(Ssc *ssc, uint32_t frame);
64extern uint32_t SSC_Read(Ssc *ssc);
65extern uint8_t SSC_IsRxReady(Ssc *ssc);
66
67#ifdef __cplusplus
68}
69#endif
70
71#endif /* #ifndef _SSC_ */
72
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