nes-proj/arch/cpu/arm/arm-def.h
George Oikonomou b2438b4563 Enable putchar for all arm platforms
Instead of having to #undef putchar in every file where we want to use it, we undef it across the board. See the comment in arm-def.h as to why this needs done.
2018-03-30 22:20:48 +01:00

86 lines
3.3 KiB
C

/*
* Copyright (c) 2017, George Oikonomou - http://www.spd.gr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup arm
* @{
*
* \file
* Compiler and data type definitions for all ARM-based CPUs
*/
/*---------------------------------------------------------------------------*/
#ifndef ARM_DEF_
#define ARM_DEF_
/*---------------------------------------------------------------------------*/
#include <stdint.h>
/*---------------------------------------------------------------------------*/
/**
* \name Macros and typedefs
*
* Those values are not meant to be modified by the user
* @{
*/
#define CLOCK_CONF_SECOND 128
/* Clock (time) comparison macro */
#define CLOCK_LT(a, b) ((signed long)((a) - (b)) < 0)
/* Platform typedefs */
typedef uint32_t clock_time_t;
typedef uint32_t uip_stats_t;
typedef uint32_t rtimer_clock_t;
#define RTIMER_CLOCK_DIFF(a, b) ((int32_t)((a) - (b)))
/** @} */
/*
* The stdio.h that ships with the arm-gcc toolchain does this:
*
* int _EXFUN(putchar, (int));
* [...]
* #define putchar(x) putc(x, stdout)
*
* This causes us a lot of trouble: For platforms using this toolchain, every
* time we use putchar we need to first #undef putchar. What we do here is to
* #undef putchar across the board. The resulting code will cause the linker
* to search for a symbol named putchar and this allows us to use the
* implementation under os/lib/dbg-io.
*
* This will fail if stdio.h is included before contiki.h, but it is common
* practice to include contiki.h first
*/
#include <stdio.h>
#undef putchar
/*---------------------------------------------------------------------------*/
#endif /* ARM_DEF_ */
/*---------------------------------------------------------------------------*/
/** @} */