Diff: sample_programs/sample_03_spdif_loop_back.cpp

Revision:

0:b4c1e32627f2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sample_programs/sample_03_spdif_loop_back.cpp	Mon Oct 12 02:25:49 2020 +0000
@@ -0,0 +1,102 @@
+/*******************************************************************************
+* DISCLAIMER
+* This software is supplied by Renesas Electronics Corporation and is only
+* intended for use with Renesas products. No other uses are authorized. This
+* software is owned by Renesas Electronics Corporation and is protected under
+* all applicable laws, including copyright laws.
+* THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING
+* THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT
+* LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
+* AND NON-INFRINGEMENT. ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED.
+* TO THE MAXIMUM EXTENT PERMITTED NOT PROHIBITED BY LAW, NEITHER RENESAS
+* ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES SHALL BE LIABLE
+* FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
+* ANY REASON RELATED TO THIS SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE
+* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+* Renesas reserves the right, without notice, to make changes to this software
+* and to discontinue the availability of this software. By using this software,
+* you agree to the additional terms and conditions found by accessing the
+* following link:
+* http://www.renesas.com/disclaimer
+*
+* Copyright (C) 2019 Renesas Electronics Corporation. All rights reserved.
+*******************************************************************************/
+#include "sample_select.h"
+
+#if (SAMPLE_PROGRAM_NO == 3)
+// SAMPLE_PROGRAM_NO  3 : SPDIF loop back sample
+//
+// The input sound is output as it is.
+// In case of SAMPLE_PROGRAM_NO=3 :
+//   Since TARGET_RZ_A2M_EVB has no connector and no suitable AUDIO_CLK has been entered, only pseudo-evaluation is executed.
+//   - Please connect PC_5 and PC_4 when evaluating.
+//   - Since AUDIO_CLK on the board is 11.2896 MHz, it operates at half the actual speed.
+//   - The AUDIO_CLK frequency required is 512 times as large as the sample frequency for audio data.
+//     (fs=44.1kHz : AUDIO_CLK=22.5792MHz, fs=48kHz : AUDIO_CLK=24.5760MHz)
+
+#if !defined(TARGET_RZ_A2M_EVB)
+#error "SPDIF is not supported."
+#endif
+
+#include "mbed.h"
+#include "SPDIF_RBSP.h"
+
+#define WRITE_BUFF_NUM         (8)
+#define READ_BUFF_NUM          (8)
+#define MAIL_QUEUE_SIZE        (WRITE_BUFF_NUM + READ_BUFF_NUM + 1)
+#define INFO_TYPE_WRITE_END    (0)
+#define INFO_TYPE_READ_END     (1)
+
+#define AUDIO_BUFF_SIZE        (192 * 2 * 10) // 1 block * 2ch * 10
+SPDIF_RBSP audio(P6_4, PC_5, PC_4, false, 0x80, WRITE_BUFF_NUM, READ_BUFF_NUM);
+
+typedef struct {
+    uint32_t info_type;
+    void *   p_data;
+    int32_t  result;
+} mail_t;
+Mail<mail_t, MAIL_QUEUE_SIZE> mail_box;
+
+//32 bytes aligned! No cache memory
+static uint8_t audio_read_buff[READ_BUFF_NUM][AUDIO_BUFF_SIZE] __attribute((section("NC_BSS"),aligned(32)));
+
+static void callback_audio(void * p_data, int32_t result, void * p_app_data) {
+    mail_t *mail = mail_box.alloc();
+
+    if (mail == NULL) {
+        printf("error mail alloc\r\n");
+    } else {
+        mail->info_type = (uint32_t)p_app_data;
+        mail->p_data    = p_data;
+        mail->result    = result;
+        mail_box.put(mail);
+    }
+}
+
+int main() {
+    rbsp_data_conf_t audio_write_conf = {&callback_audio, (void *)INFO_TYPE_WRITE_END};
+    rbsp_data_conf_t audio_read_conf  = {&callback_audio, (void *)INFO_TYPE_READ_END};
+
+    // Read buffer setting
+    for (int i = 0; i < READ_BUFF_NUM; i++) {
+        if (audio.read(audio_read_buff[i], AUDIO_BUFF_SIZE, &audio_read_conf) < 0) {
+            printf("read error\r\n");
+        }
+    }
+
+    while (1) {
+        osEvent evt = mail_box.get();
+        if (evt.status == osEventMail) {
+            mail_t *mail = (mail_t *)evt.value.p;
+
+            if ((mail->info_type == INFO_TYPE_READ_END) && (mail->result > 0)) {
+                audio.write(mail->p_data, mail->result, &audio_write_conf);
+            } else {
+                audio.read(mail->p_data, AUDIO_BUFF_SIZE, &audio_read_conf); // Resetting read buffer
+            }
+            mail_box.free(mail);
+        }
+    }
+}
+
+#endif