不韋 呂 / F746_SD_VarableFilter

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/common/board.c@2:dcaee06f6ccb, 2016-10-02 (annotated)

Committer:
MikamiUitOpen
Date:
Sun Oct 02 10:40:44 2016 +0000
Revision:
2:dcaee06f6ccb
3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 2:dcaee06f6ccb 1 /* mbed Microcontroller Library
MikamiUitOpen 2:dcaee06f6ccb 2 * Copyright (c) 2006-2013 ARM Limited
MikamiUitOpen 2:dcaee06f6ccb 3 *
MikamiUitOpen 2:dcaee06f6ccb 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 2:dcaee06f6ccb 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 2:dcaee06f6ccb 6 * You may obtain a copy of the License at
MikamiUitOpen 2:dcaee06f6ccb 7 *
MikamiUitOpen 2:dcaee06f6ccb 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 2:dcaee06f6ccb 9 *
MikamiUitOpen 2:dcaee06f6ccb 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 2:dcaee06f6ccb 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 2:dcaee06f6ccb 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 2:dcaee06f6ccb 13 * See the License for the specific language governing permissions and
MikamiUitOpen 2:dcaee06f6ccb 14 * limitations under the License.
MikamiUitOpen 2:dcaee06f6ccb 15 */
MikamiUitOpen 2:dcaee06f6ccb 16 #include "gpio_api.h"
MikamiUitOpen 2:dcaee06f6ccb 17 #include "wait_api.h"
MikamiUitOpen 2:dcaee06f6ccb 18 #include "toolchain.h"
MikamiUitOpen 2:dcaee06f6ccb 19 #include "mbed_interface.h"
MikamiUitOpen 2:dcaee06f6ccb 20
MikamiUitOpen 2:dcaee06f6ccb 21 WEAK void mbed_die(void) {
MikamiUitOpen 2:dcaee06f6ccb 22 #if !defined (NRF51_H) && !defined(TARGET_EFM32)
MikamiUitOpen 2:dcaee06f6ccb 23 __disable_irq(); // dont allow interrupts to disturb the flash pattern
MikamiUitOpen 2:dcaee06f6ccb 24 #endif
MikamiUitOpen 2:dcaee06f6ccb 25 #if (DEVICE_ERROR_RED == 1)
MikamiUitOpen 2:dcaee06f6ccb 26 gpio_t led_red; gpio_init_out(&led_red, LED_RED);
MikamiUitOpen 2:dcaee06f6ccb 27 #elif (DEVICE_ERROR_PATTERN == 1)
MikamiUitOpen 2:dcaee06f6ccb 28 gpio_t led_1; gpio_init_out(&led_1, LED1);
MikamiUitOpen 2:dcaee06f6ccb 29 gpio_t led_2; gpio_init_out(&led_2, LED2);
MikamiUitOpen 2:dcaee06f6ccb 30 gpio_t led_3; gpio_init_out(&led_3, LED3);
MikamiUitOpen 2:dcaee06f6ccb 31 gpio_t led_4; gpio_init_out(&led_4, LED4);
MikamiUitOpen 2:dcaee06f6ccb 32 #endif
MikamiUitOpen 2:dcaee06f6ccb 33
MikamiUitOpen 2:dcaee06f6ccb 34 while (1) {
MikamiUitOpen 2:dcaee06f6ccb 35 #if (DEVICE_ERROR_RED == 1)
MikamiUitOpen 2:dcaee06f6ccb 36 gpio_write(&led_red, 1);
MikamiUitOpen 2:dcaee06f6ccb 37
MikamiUitOpen 2:dcaee06f6ccb 38 #elif (DEVICE_ERROR_PATTERN == 1)
MikamiUitOpen 2:dcaee06f6ccb 39 gpio_write(&led_1, 1);
MikamiUitOpen 2:dcaee06f6ccb 40 gpio_write(&led_2, 0);
MikamiUitOpen 2:dcaee06f6ccb 41 gpio_write(&led_3, 0);
MikamiUitOpen 2:dcaee06f6ccb 42 gpio_write(&led_4, 1);
MikamiUitOpen 2:dcaee06f6ccb 43 #endif
MikamiUitOpen 2:dcaee06f6ccb 44
MikamiUitOpen 2:dcaee06f6ccb 45 wait_ms(150);
MikamiUitOpen 2:dcaee06f6ccb 46
MikamiUitOpen 2:dcaee06f6ccb 47 #if (DEVICE_ERROR_RED == 1)
MikamiUitOpen 2:dcaee06f6ccb 48 gpio_write(&led_red, 0);
MikamiUitOpen 2:dcaee06f6ccb 49
MikamiUitOpen 2:dcaee06f6ccb 50 #elif (DEVICE_ERROR_PATTERN == 1)
MikamiUitOpen 2:dcaee06f6ccb 51 gpio_write(&led_1, 0);
MikamiUitOpen 2:dcaee06f6ccb 52 gpio_write(&led_2, 1);
MikamiUitOpen 2:dcaee06f6ccb 53 gpio_write(&led_3, 1);
MikamiUitOpen 2:dcaee06f6ccb 54 gpio_write(&led_4, 0);
MikamiUitOpen 2:dcaee06f6ccb 55 #endif
MikamiUitOpen 2:dcaee06f6ccb 56
MikamiUitOpen 2:dcaee06f6ccb 57 wait_ms(150);
MikamiUitOpen 2:dcaee06f6ccb 58 }
MikamiUitOpen 2:dcaee06f6ccb 59 }