SD card player with variable cotoff frequency lowpass and highpass IIR filter. SD カードの *.wav ファイルのオーディオ信号を,遮断周波数可変 IIR 低域通過および高域通過フィルタを通して,ボードに搭載されているCODEC で出力する.このプログラムについては,CQ出版社インターフェース誌 2018年8月号で解説している.
Dependencies: F746_GUI F746_SAI_IO FrequencyResponseDrawer SD_PlayerSkeleton
mbed_src_STM32F7/api/mbed_debug.h
- Committer:
- MikamiUitOpen
- Date:
- 2016-10-02
- Revision:
- 2:dcaee06f6ccb
File content as of revision 2:dcaee06f6ccb:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef MBED_DEBUG_H #define MBED_DEBUG_H #include "device.h" #ifdef __cplusplus extern "C" { #endif #if DEVICE_STDIO_MESSAGES #include <stdio.h> #include <stdarg.h> /** Output a debug message * * @param format printf-style format string, followed by variables */ static inline void debug(const char *format, ...) { va_list args; va_start(args, format); vfprintf(stderr, format, args); va_end(args); } /** Conditionally output a debug message * * NOTE: If the condition is constant false (!= 1) and the compiler optimization * level is greater than 0, then the whole function will be compiled away. * * @param condition output only if condition is true (== 1) * @param format printf-style format string, followed by variables */ static inline void debug_if(int condition, const char *format, ...) { if (condition == 1) { va_list args; va_start(args, format); vfprintf(stderr, format, args); va_end(args); } } #else static inline void debug(const char *format, ...) {} static inline void debug_if(int condition, const char *format, ...) {} #endif #ifdef __cplusplus } #endif #endif