diff --git a/arch/avr/include/debug.h b/arch/avr/include/debug.h new file mode 100644 index 00000000000..bc879ffc7be --- /dev/null +++ b/arch/avr/include/debug.h @@ -0,0 +1,85 @@ +/**************************************************************************** + * arch/avr/include/debug.h + * + * Copyright (C) 2007-2011, 2014 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 NuttX 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 OWNER 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. + * + ****************************************************************************/ + +#ifndef __INCLUDE_ARCH_AVR_DEBUG_H +#define __INCLUDE_ARCH_AVR_DEBUG_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#ifdef CONFIG_AVR_HAS_MEMX_PTR + +#include +#include + +#include + + +/* + * Since format string that is passed to __arch_syslog() can be a + * comma-separated list, we need some cpp trickery to handle it + * + * __dbg_first() helper macro accepts the format (that is potentially + * a comma-separated) and substitutes to its first element. + * + * __dbg_subst() helper macro substitutes first element in the format + * with prefix. + */ +#define __dbg_first(format, ...) format +#define __dbg_subst(prefix, format, ...) prefix, ##__VA_ARGS__ + +#define __dbg_expand(logger, prio, format, ...) \ + do { \ + static const IOBJ char dbg_s[] = __dbg_first(format); \ + logger(prio, __dbg_subst(dbg_s, format), ##__VA_ARGS__); \ + } while(0) + +/* + * __arch_syslog() and __arch_lowsyslog() override behavior of NuttX + * dbg macros. They put the format string into program memory and + * utilize IPTR (__memx) parameter of syslog to take the format + * directly from program memory. This reduces amount of RAM held by + * the format strings used in debug statements. + */ +#define __arch_syslog(...) \ + __dbg_expand(syslog, ##__VA_ARGS__) + +#define __arch_lowsyslog(...) \ + __dbg_expand(lowsyslog, ##__VA_ARGS__) + +#endif /* CONFIG_AVR_HAS_MEMX_PTR */ + +#endif /* __INCLUDE_ARCH_DEBUG_H */ diff --git a/arch/avr/src/avr/Kconfig b/arch/avr/src/avr/Kconfig index 5010dc57b36..0f9c2c59516 100644 --- a/arch/avr/src/avr/Kconfig +++ b/arch/avr/src/avr/Kconfig @@ -73,6 +73,7 @@ menu "Atmel AVR Toolchain options" config AVR_HAS_MEMX_PTR bool "Enable in-flash static const stings" depends on AVR_ATMEL_AVR_TOOLCHAIN + select ARCH_DEBUG_H default y ---help--- Enabling this option (recommended) will place all constant