Playing audio with the X-NUCLEO-CCA01M1 Expansion Board

Diff: main.cpp

Revision:

0:8d09369ca839

Child:

4:6bb9e11d322b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Feb 22 17:43:34 2017 +0100
@@ -0,0 +1,184 @@
+/**
+ ******************************************************************************
+ * @file    main.cpp
+ * @author  Davide Aliprandi, STMicroelectronics
+ * @version V1.0.0
+ * @date    March 25th, 2016
+ * @brief   mbed test application for the STMicroelectronics X-NUCLEO-CCA01M1
+ *          Sound Terminal Expansion Board.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
+ *
+ * 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 of STMicroelectronics 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 HOLDER 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.
+ *
+ ******************************************************************************
+ */
+
+
+/* Includes ------------------------------------------------------------------*/
+
+/* mbed specific header files. */
+#include "mbed.h"
+#include "rtos.h"
+
+
+#if DEVICE_I2S
+
+/* Helper header files. */
+#include "DevI2C.h"
+
+/* Component specific header files. */
+#include "sta350bw_class.h"
+
+/* My song header file. */
+#include "my_song.h"
+
+
+/* Definitions ---------------------------------------------------------------*/
+
+/* Events. */
+#define PLAY_STOP_EVENT      (0x1)
+
+
+/* Variables -----------------------------------------------------------------*/
+
+/* Initialization parameters. */
+STA350BW_Init_t init =
+{
+    32000,   /* Default Sampling Frequency [Hz]. */
+    100      /* Default Volume. */
+};
+
+/* Sound Terminal Component. */
+STA350BW *sound_terminal;
+
+/* Thread to manage I2S peripherals. */
+static rtos::Thread i2s_bh_daemon;
+
+/* Threads. */
+Thread *play_stop_thread;
+
+/* User button handling. */
+InterruptIn event(USER_BUTTON);
+
+
+/* Functions -----------------------------------------------------------------*/
+
+/**
+ * @brief  User button handler function.
+ * @param  None.
+ * @retval None.
+ */
+void pressed(void)
+{
+    /* Signal to play/stop handler thread. */
+    play_stop_thread->signal_set(PLAY_STOP_EVENT);
+}
+
+/**
+ * @brief  Play/stop handler function.
+ * @param  None.
+ * @retval None.
+ */
+void PlayStopHandler(void)
+{
+    while (true)
+    {
+        static bool stop = true;
+
+        /* Waiting for play/stop events. */
+        play_stop_thread->signal_wait(PLAY_STOP_EVENT);
+
+        if (stop)
+            sound_terminal->Stop();
+        else
+            sound_terminal->Play((int16_t *) my_song, (uint16_t) sizeof(my_song), true);
+        printf("--> %s\r\n", stop ? "Stop." : "Playing...");
+
+        stop = !stop;
+    }
+}
+
+/**
+ * @brief  Entry point function of mbedOS.
+ * @param  None
+ * @retval None
+ */
+int main(void)
+{
+    /*----- Initialization. -----*/
+
+    /* Initializing I2C bus. */
+    DevI2C *dev_i2c = new DevI2C(
+        PB_9, PullUp,
+        PB_8, PullUp
+    );
+
+    /* Initializing Sound Terminal Component. */
+#ifndef USE_I2S2
+    sound_terminal = new STA350BW(PA_10, STA350BW_ADDRESS_1, *dev_i2c, PB_15, PB_13, PB_12, NC, PC_6);
+#else
+    sound_terminal = new STA350BW(PA_10, STA350BW_ADDRESS_2, *dev_i2c, PC_12, PC_10, PA_4, NC, PC_7);
+#endif
+    if (sound_terminal->Init(&init) != COMPONENT_OK)
+    {
+        error("Initialization of the Sound Terminal Expansion Board failed.\r\n");
+        exit(EXIT_FAILURE);
+    }
+
+    /* Starting a thread to manage I2S peripherals. */
+    Callback<void()> i2s_bh_task(&I2S::i2s_bh_queue, &events::EventQueue::dispatch_forever);
+    i2s_bh_daemon.start(i2s_bh_task);
+
+    /* Scheduling the play/stop function. */
+    play_stop_thread = new Thread();
+    osStatus status = play_stop_thread->start(PlayStopHandler);
+    if (status != osOK)
+        printf("Could not start the play/stop handler thread.\r\n");
+    event.fall(&pressed);
+
+    /* Setting Sound Terminal Component's parameters. */
+    sound_terminal->SetFrequency(MY_SONG_AUDIO_FREQUENCY);
+    sound_terminal->SetVolume(STA350BW_CHANNEL_MASTER, 60);
+
+    /* Printing to the console. */
+    printf("Sound Terminal Application Example\r\n\n");
+
+
+    /*----- Playing. -----*/
+
+    /* Printing to the console. */
+    printf("--> Playing...\r\n");
+    sound_terminal->Play((int16_t *) my_song, (uint16_t) sizeof(my_song), true);
+}
+
+#else // DEVICE_I2S
+
+int main(void)
+{
+    printf("The target does not support I2S API.\r\n");
+}
+
+#endif // DEVICE_I2S