不韋 呂
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
Diff: mbed_src_STM32F7/common/board.c
- Revision:
- 2:dcaee06f6ccb
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_src_STM32F7/common/board.c Sun Oct 02 10:40:44 2016 +0000
@@ -0,0 +1,59 @@
+/* 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.
+ */
+#include "gpio_api.h"
+#include "wait_api.h"
+#include "toolchain.h"
+#include "mbed_interface.h"
+
+WEAK void mbed_die(void) {
+#if !defined (NRF51_H) && !defined(TARGET_EFM32)
+ __disable_irq(); // dont allow interrupts to disturb the flash pattern
+#endif
+#if (DEVICE_ERROR_RED == 1)
+ gpio_t led_red; gpio_init_out(&led_red, LED_RED);
+#elif (DEVICE_ERROR_PATTERN == 1)
+ gpio_t led_1; gpio_init_out(&led_1, LED1);
+ gpio_t led_2; gpio_init_out(&led_2, LED2);
+ gpio_t led_3; gpio_init_out(&led_3, LED3);
+ gpio_t led_4; gpio_init_out(&led_4, LED4);
+#endif
+
+ while (1) {
+#if (DEVICE_ERROR_RED == 1)
+ gpio_write(&led_red, 1);
+
+#elif (DEVICE_ERROR_PATTERN == 1)
+ gpio_write(&led_1, 1);
+ gpio_write(&led_2, 0);
+ gpio_write(&led_3, 0);
+ gpio_write(&led_4, 1);
+#endif
+
+ wait_ms(150);
+
+#if (DEVICE_ERROR_RED == 1)
+ gpio_write(&led_red, 0);
+
+#elif (DEVICE_ERROR_PATTERN == 1)
+ gpio_write(&led_1, 0);
+ gpio_write(&led_2, 1);
+ gpio_write(&led_3, 1);
+ gpio_write(&led_4, 0);
+#endif
+
+ wait_ms(150);
+ }
+}