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2478058b7a
If board.h or config_chip.h is included before config.h, CONFIG_* flags
may be incorrect. For example, if config.h says:
...
#define CONFIG_DEFINED_FLAG
...
#include "board.h"
...
And board.h says:
#ifndef __BOARD_H
#define __BOARD_H
...
#undef CONFIG_DEFINED_FLAG
...
#endif
Then this code:
#include "board.h"
#include "config.h"
would results in CONFIG_DEFINED_FLAG being defined, instead of undefined
as stated in board.h.
Avoid this by emitting error when board.h or config_chip.h is included
before config.h.
BUG=None
TEST=make buildall
BRANCH=None
Change-Id: Ic4a8b68e8ab1ef2a4cf9e926ab9008d2b106b943
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/203265
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
50 lines
921 B
C
50 lines
921 B
C
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* GPIO UART debug printf */
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#include "common.h"
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#include "printf.h"
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#include "registers.h"
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#include "timer.h"
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#include "util.h"
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#define BAUD 38400
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#define BIT_PERIOD (1000000 / BAUD)
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int debug_txchar(void *context, int c)
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{
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int i;
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timestamp_t st;
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int32_t d;
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if (c == '\n')
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debug_txchar(context, '\r');
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c = (c << 1) | (1 << 9);
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st = get_time();
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for (i = 0; i < 10; ++i) {
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STM32_GPIO_BSRR(GPIO_A) = 1 << ((c & 1) ? 15 : 31);
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d = (int32_t)st.le.lo + BIT_PERIOD * (i + 1) - get_time().le.lo;
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if (d > 0)
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udelay(d);
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c >>= 1;
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}
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return 0;
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}
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void debug_printf(const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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vfnprintf(debug_txchar, NULL, format, args);
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va_end(args);
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}
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void panic(const char *msg)
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{
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}
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