Example application which combines the STMicroelectronics X-NUCLEO-CCA01M1 Sound Terminal Expansion Board and the X-NUCLEO-CCA02M1 MEMS Microphones Expansion Board to realize a simple stereo@32KHz Karaoke system. It is built against mbed OS.
Dependencies: X_NUCLEO_CCA02M1 X_NUCLEO_CCA01M1
Having fun with Karaoke
This application provides an example of usage of the X-NUCLEO-CCA01M1 Sound Terminal Expansion Board and the X-NUCLEO-CCA02M1 MEMS Microphones Expansion Board on top of a Nucleo-F401RE board to realize a simple stereo@32KHz Karaoke system: it records the audio through the microphones and plays it through the speakers on the fly. It is built against mbed OS.
Power supply
The X-NUCLEO-CCA01M1 Sound Terminal Expansion Board has to be powered with at least 5V DC. You can connect the VCC terminal to an external power supplier or directly to the +5V pin of the CN6 Arduino connector.
SW Configuration
Currently the only configuration supported is stereo@32KHz for both boards.
HW Configuration
To make the two audio boards work together, the X-NUCLEO-CCA01M1 Sound Terminal Expansion Board has to be configured to use the I2S2 peripheral of the Nucleo F401RE board: please refer to the X_NUCLEO_CCA01M1 page.
main.cpp@0:ccce492abbb4, 2017-05-03 (annotated)
- Committer:
- Davidroid
- Date:
- Wed May 03 10:01:24 2017 +0000
- Revision:
- 0:ccce492abbb4
Karaoke
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Davidroid | 0:ccce492abbb4 | 1 | /** |
Davidroid | 0:ccce492abbb4 | 2 | ****************************************************************************** |
Davidroid | 0:ccce492abbb4 | 3 | * @file main.cpp |
Davidroid | 0:ccce492abbb4 | 4 | * @author Davide Aliprandi, STMicroelectronics |
Davidroid | 0:ccce492abbb4 | 5 | * @version V1.0.0 |
Davidroid | 0:ccce492abbb4 | 6 | * @date November 25th, 2016 |
Davidroid | 0:ccce492abbb4 | 7 | * @brief mbed test application which combines the STMicroelectronics |
Davidroid | 0:ccce492abbb4 | 8 | * X-NUCLEO-CCA01M1 and the X-NUCLEO-CCA02M1 Expansion Boards. |
Davidroid | 0:ccce492abbb4 | 9 | ****************************************************************************** |
Davidroid | 0:ccce492abbb4 | 10 | * @attention |
Davidroid | 0:ccce492abbb4 | 11 | * |
Davidroid | 0:ccce492abbb4 | 12 | * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> |
Davidroid | 0:ccce492abbb4 | 13 | * |
Davidroid | 0:ccce492abbb4 | 14 | * Redistribution and use in source and binary forms, with or without modification, |
Davidroid | 0:ccce492abbb4 | 15 | * are permitted provided that the following conditions are met: |
Davidroid | 0:ccce492abbb4 | 16 | * 1. Redistributions of source code must retain the above copyright notice, |
Davidroid | 0:ccce492abbb4 | 17 | * this list of conditions and the following disclaimer. |
Davidroid | 0:ccce492abbb4 | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
Davidroid | 0:ccce492abbb4 | 19 | * this list of conditions and the following disclaimer in the documentation |
Davidroid | 0:ccce492abbb4 | 20 | * and/or other materials provided with the distribution. |
Davidroid | 0:ccce492abbb4 | 21 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
Davidroid | 0:ccce492abbb4 | 22 | * may be used to endorse or promote products derived from this software |
Davidroid | 0:ccce492abbb4 | 23 | * without specific prior written permission. |
Davidroid | 0:ccce492abbb4 | 24 | * |
Davidroid | 0:ccce492abbb4 | 25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
Davidroid | 0:ccce492abbb4 | 26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
Davidroid | 0:ccce492abbb4 | 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
Davidroid | 0:ccce492abbb4 | 28 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
Davidroid | 0:ccce492abbb4 | 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
Davidroid | 0:ccce492abbb4 | 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
Davidroid | 0:ccce492abbb4 | 31 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
Davidroid | 0:ccce492abbb4 | 32 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
Davidroid | 0:ccce492abbb4 | 33 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
Davidroid | 0:ccce492abbb4 | 34 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Davidroid | 0:ccce492abbb4 | 35 | * |
Davidroid | 0:ccce492abbb4 | 36 | ****************************************************************************** |
Davidroid | 0:ccce492abbb4 | 37 | */ |
Davidroid | 0:ccce492abbb4 | 38 | |
Davidroid | 0:ccce492abbb4 | 39 | |
Davidroid | 0:ccce492abbb4 | 40 | /* Includes ------------------------------------------------------------------*/ |
Davidroid | 0:ccce492abbb4 | 41 | |
Davidroid | 0:ccce492abbb4 | 42 | /* mbed specific header files. */ |
Davidroid | 0:ccce492abbb4 | 43 | #include "mbed.h" |
Davidroid | 0:ccce492abbb4 | 44 | #include "rtos.h" |
Davidroid | 0:ccce492abbb4 | 45 | |
Davidroid | 0:ccce492abbb4 | 46 | |
Davidroid | 0:ccce492abbb4 | 47 | #if DEVICE_I2S |
Davidroid | 0:ccce492abbb4 | 48 | |
Davidroid | 0:ccce492abbb4 | 49 | /* Helper header files. */ |
Davidroid | 0:ccce492abbb4 | 50 | #include "DevI2C.h" |
Davidroid | 0:ccce492abbb4 | 51 | |
Davidroid | 0:ccce492abbb4 | 52 | /* Component specific header files. */ |
Davidroid | 0:ccce492abbb4 | 53 | #include "STA350BW.h" |
Davidroid | 0:ccce492abbb4 | 54 | |
Davidroid | 0:ccce492abbb4 | 55 | /* Expansion Board specific header files. */ |
Davidroid | 0:ccce492abbb4 | 56 | #include "XNucleoCCA02M1.h" |
Davidroid | 0:ccce492abbb4 | 57 | |
Davidroid | 0:ccce492abbb4 | 58 | |
Davidroid | 0:ccce492abbb4 | 59 | /* Variables -----------------------------------------------------------------*/ |
Davidroid | 0:ccce492abbb4 | 60 | |
Davidroid | 0:ccce492abbb4 | 61 | /* Initialization parameters. */ |
Davidroid | 0:ccce492abbb4 | 62 | STA350BW_init_t sound_terminal_init = |
Davidroid | 0:ccce492abbb4 | 63 | { |
Davidroid | 0:ccce492abbb4 | 64 | 32000, /* Default Sampling Frequency [Hz]. */ |
Davidroid | 0:ccce492abbb4 | 65 | 100 /* Default Volume. */ |
Davidroid | 0:ccce492abbb4 | 66 | }; |
Davidroid | 0:ccce492abbb4 | 67 | XNucleoCCA02M1_init_t microphones_init = |
Davidroid | 0:ccce492abbb4 | 68 | { |
Davidroid | 0:ccce492abbb4 | 69 | 32000, /* Default Sampling Frequency [Hz]. */ |
Davidroid | 0:ccce492abbb4 | 70 | 2 /* Default number of channels. */ |
Davidroid | 0:ccce492abbb4 | 71 | }; |
Davidroid | 0:ccce492abbb4 | 72 | |
Davidroid | 0:ccce492abbb4 | 73 | /* Sound Terminal Component. */ |
Davidroid | 0:ccce492abbb4 | 74 | STA350BW *sound_terminal; |
Davidroid | 0:ccce492abbb4 | 75 | |
Davidroid | 0:ccce492abbb4 | 76 | /* MEMS Microphones Expansion Board. */ |
Davidroid | 0:ccce492abbb4 | 77 | XNucleoCCA02M1 *microphones; |
Davidroid | 0:ccce492abbb4 | 78 | |
Davidroid | 0:ccce492abbb4 | 79 | /* Thread to manage I2S peripherals. */ |
Davidroid | 0:ccce492abbb4 | 80 | static rtos::Thread i2s_bh_daemon; |
Davidroid | 0:ccce492abbb4 | 81 | |
Davidroid | 0:ccce492abbb4 | 82 | |
Davidroid | 0:ccce492abbb4 | 83 | /* Functions -----------------------------------------------------------------*/ |
Davidroid | 0:ccce492abbb4 | 84 | |
Davidroid | 0:ccce492abbb4 | 85 | /** |
Davidroid | 0:ccce492abbb4 | 86 | * @brief Callback to start playing from the sound terminal the PCM buffer |
Davidroid | 0:ccce492abbb4 | 87 | * filled by the microphones. |
Davidroid | 0:ccce492abbb4 | 88 | * @param PCM_buffer Buffer containing the PCM data to play. |
Davidroid | 0:ccce492abbb4 | 89 | * @param PCM_buffer_bytes Size of the buffer. |
Davidroid | 0:ccce492abbb4 | 90 | * @retval None. |
Davidroid | 0:ccce492abbb4 | 91 | */ |
Davidroid | 0:ccce492abbb4 | 92 | void StartPlaying(int16_t *PCM_buffer, uint16_t PCM_buffer_bytes) |
Davidroid | 0:ccce492abbb4 | 93 | { |
Davidroid | 0:ccce492abbb4 | 94 | static bool first_time = true; |
Davidroid | 0:ccce492abbb4 | 95 | if (first_time) |
Davidroid | 0:ccce492abbb4 | 96 | { |
Davidroid | 0:ccce492abbb4 | 97 | /* Start playing from the sound terminal. */ |
Davidroid | 0:ccce492abbb4 | 98 | sound_terminal->play(PCM_buffer, PCM_buffer_bytes, true); |
Davidroid | 0:ccce492abbb4 | 99 | first_time = false; |
Davidroid | 0:ccce492abbb4 | 100 | } |
Davidroid | 0:ccce492abbb4 | 101 | } |
Davidroid | 0:ccce492abbb4 | 102 | |
Davidroid | 0:ccce492abbb4 | 103 | /** |
Davidroid | 0:ccce492abbb4 | 104 | * @brief Entry point function of mbedOS. |
Davidroid | 0:ccce492abbb4 | 105 | * @param None |
Davidroid | 0:ccce492abbb4 | 106 | * @retval None |
Davidroid | 0:ccce492abbb4 | 107 | */ |
Davidroid | 0:ccce492abbb4 | 108 | int main(void) |
Davidroid | 0:ccce492abbb4 | 109 | { |
Davidroid | 0:ccce492abbb4 | 110 | /*----- Initialization. -----*/ |
Davidroid | 0:ccce492abbb4 | 111 | |
Davidroid | 0:ccce492abbb4 | 112 | /* Initializing I2C bus. */ |
Davidroid | 0:ccce492abbb4 | 113 | DevI2C *dev_i2c = new DevI2C(PB_9, PB_8); |
Davidroid | 0:ccce492abbb4 | 114 | |
Davidroid | 0:ccce492abbb4 | 115 | /* Initializing Sound Terminal Component on the I2S2 interface. */ |
Davidroid | 0:ccce492abbb4 | 116 | sound_terminal = new STA350BW(PA_10, STA350BW_ADDRESS_2, *dev_i2c, PC_12, PC_10, PA_4, NC, PC_7); |
Davidroid | 0:ccce492abbb4 | 117 | if (sound_terminal->init(&sound_terminal_init) != COMPONENT_OK) |
Davidroid | 0:ccce492abbb4 | 118 | { |
Davidroid | 0:ccce492abbb4 | 119 | error("Initialization of the Sound Terminal Expansion Board failed.\r\n"); |
Davidroid | 0:ccce492abbb4 | 120 | exit(EXIT_FAILURE); |
Davidroid | 0:ccce492abbb4 | 121 | } |
Davidroid | 0:ccce492abbb4 | 122 | |
Davidroid | 0:ccce492abbb4 | 123 | /* Initializing MEMS Microphones Expansion Board on the I2S1 interface. */ |
Davidroid | 0:ccce492abbb4 | 124 | microphones = new XNucleoCCA02M1(PB_15, PB_13); |
Davidroid | 0:ccce492abbb4 | 125 | if (microphones->init(µphones_init) != COMPONENT_OK) |
Davidroid | 0:ccce492abbb4 | 126 | { |
Davidroid | 0:ccce492abbb4 | 127 | error("Initialization of the MEMS Microphones Expansion Board failed.\r\n"); |
Davidroid | 0:ccce492abbb4 | 128 | exit(EXIT_FAILURE); |
Davidroid | 0:ccce492abbb4 | 129 | } |
Davidroid | 0:ccce492abbb4 | 130 | |
Davidroid | 0:ccce492abbb4 | 131 | /* Asking the I2S peripherals to work at frequencies one multiple of the |
Davidroid | 0:ccce492abbb4 | 132 | other in order to avoid audio glitches that may be caused by a drift |
Davidroid | 0:ccce492abbb4 | 133 | between the I2S clock signals.*/ |
Davidroid | 0:ccce492abbb4 | 134 | int ret = I2S::harmonize(sound_terminal->dev_i2s, microphones->dev_i2s); |
Davidroid | 0:ccce492abbb4 | 135 | if (ret != 0) |
Davidroid | 0:ccce492abbb4 | 136 | error("Unable to synchronize audio frequencies.\r\n"); |
Davidroid | 0:ccce492abbb4 | 137 | |
Davidroid | 0:ccce492abbb4 | 138 | /* Starting a thread to manage I2S peripherals. */ |
Davidroid | 0:ccce492abbb4 | 139 | Callback<void()> i2s_bh_task(&I2S::i2s_bh_queue, &events::EventQueue::dispatch_forever); |
Davidroid | 0:ccce492abbb4 | 140 | i2s_bh_daemon.start(i2s_bh_task); |
Davidroid | 0:ccce492abbb4 | 141 | |
Davidroid | 0:ccce492abbb4 | 142 | /* Printing to the console. */ |
Davidroid | 0:ccce492abbb4 | 143 | printf("Audio Karaoke Application Example\r\n\n"); |
Davidroid | 0:ccce492abbb4 | 144 | |
Davidroid | 0:ccce492abbb4 | 145 | |
Davidroid | 0:ccce492abbb4 | 146 | /*----- Recording and playing. -----*/ |
Davidroid | 0:ccce492abbb4 | 147 | |
Davidroid | 0:ccce492abbb4 | 148 | /* Printing to the console. */ |
Davidroid | 0:ccce492abbb4 | 149 | printf("--> Sing a song and have fun!\r\n"); |
Davidroid | 0:ccce492abbb4 | 150 | |
Davidroid | 0:ccce492abbb4 | 151 | /* Attaching a callback which will be called each time the microphones have |
Davidroid | 0:ccce492abbb4 | 152 | recorded 1 ms of audio data, and start recording. */ |
Davidroid | 0:ccce492abbb4 | 153 | microphones->attach(&StartPlaying); |
Davidroid | 0:ccce492abbb4 | 154 | microphones->record(); |
Davidroid | 0:ccce492abbb4 | 155 | } |
Davidroid | 0:ccce492abbb4 | 156 | |
Davidroid | 0:ccce492abbb4 | 157 | #else // DEVICE_I2S |
Davidroid | 0:ccce492abbb4 | 158 | |
Davidroid | 0:ccce492abbb4 | 159 | int main(void) |
Davidroid | 0:ccce492abbb4 | 160 | { |
Davidroid | 0:ccce492abbb4 | 161 | printf("The target does not support I2S API.\r\n"); |
Davidroid | 0:ccce492abbb4 | 162 | } |
Davidroid | 0:ccce492abbb4 | 163 | |
Davidroid | 0:ccce492abbb4 | 164 | #endif // DEVICE_I2S |