Synthesizer based on the Unzen / Nucleo F746ZG
Dependencies: amakusa mbed-dsp mbed shimabara ukifune unzen_nucleo_f746
Fork of skeleton_unzen_nucleo_f746 by
雲仙フレームワークのテストとして作っているプロジェクトです。中身はどんどん変っていきます。 説明はDSP空挺団の「シンセサイザー」カテゴリーを参照してください。初回は「ドッグフードを食べる」です。
main.cpp@1:98ddcbbe10ba, 2016-12-11 (annotated)
- Committer:
- shorie
- Date:
- Sun Dec 11 21:05:20 2016 +0000
- Revision:
- 1:98ddcbbe10ba
- Parent:
- 0:a837eeab3ca6
- Child:
- 2:d5028a37f17b
Beta establishment. Demonstration of Unzen.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
shorie | 1:98ddcbbe10ba | 1 | #include "mbed.h" |
shorie | 1:98ddcbbe10ba | 2 | |
shorie | 1:98ddcbbe10ba | 3 | |
shorie | 0:a837eeab3ca6 | 4 | #include "unzen.h" // audio framework include file |
shorie | 1:98ddcbbe10ba | 5 | #include "umb_adau1361a.h" // audio codec contoler include file |
shorie | 1:98ddcbbe10ba | 6 | #include "amakusa.h" // audio signal processing class library. |
shorie | 0:a837eeab3ca6 | 7 | |
shorie | 1:98ddcbbe10ba | 8 | #define CODEC_I2C_ADDR 0x38 // Address of the ADAU-1361A |
shorie | 0:a837eeab3ca6 | 9 | |
shorie | 0:a837eeab3ca6 | 10 | DigitalOut myled1(LED1); |
shorie | 0:a837eeab3ca6 | 11 | |
shorie | 1:98ddcbbe10ba | 12 | amakusa::OSCSinCos osc( 440.0, 48000 ); // freq=440Hz, Fs=48kHz. |
shorie | 0:a837eeab3ca6 | 13 | |
shorie | 0:a837eeab3ca6 | 14 | // customer signal processing initialization call back. |
shorie | 0:a837eeab3ca6 | 15 | void init_callback( |
shorie | 0:a837eeab3ca6 | 16 | unsigned int block_size // block size [sample] |
shorie | 0:a837eeab3ca6 | 17 | ) |
shorie | 0:a837eeab3ca6 | 18 | { |
shorie | 0:a837eeab3ca6 | 19 | // place initialization code here |
shorie | 0:a837eeab3ca6 | 20 | } |
shorie | 0:a837eeab3ca6 | 21 | |
shorie | 0:a837eeab3ca6 | 22 | |
shorie | 0:a837eeab3ca6 | 23 | // customer signal processing call back. |
shorie | 0:a837eeab3ca6 | 24 | void process_callback( |
shorie | 0:a837eeab3ca6 | 25 | float rx_left_buffer[], // array of the left input samples |
shorie | 0:a837eeab3ca6 | 26 | float rx_right_buffer[], // array of the right input samples |
shorie | 0:a837eeab3ca6 | 27 | float tx_left_buffer[], // place to write the left output samples |
shorie | 0:a837eeab3ca6 | 28 | float tx_right_buffer[], // place to write the left output samples |
shorie | 0:a837eeab3ca6 | 29 | unsigned int block_size // block size [sample] |
shorie | 0:a837eeab3ca6 | 30 | ) |
shorie | 0:a837eeab3ca6 | 31 | { |
shorie | 1:98ddcbbe10ba | 32 | // generate tone. |
shorie | 1:98ddcbbe10ba | 33 | osc.run( tx_left_buffer, block_size ); |
shorie | 1:98ddcbbe10ba | 34 | |
shorie | 1:98ddcbbe10ba | 35 | // copy left to right |
shorie | 0:a837eeab3ca6 | 36 | for ( int i=0; i<block_size; i++) // for all sample |
shorie | 0:a837eeab3ca6 | 37 | { |
shorie | 1:98ddcbbe10ba | 38 | tx_right_buffer[i] = tx_left_buffer[i] *= 0.5F; |
shorie | 0:a837eeab3ca6 | 39 | |
shorie | 0:a837eeab3ca6 | 40 | } |
shorie | 0:a837eeab3ca6 | 41 | } |
shorie | 0:a837eeab3ca6 | 42 | |
shorie | 0:a837eeab3ca6 | 43 | |
shorie | 0:a837eeab3ca6 | 44 | |
shorie | 0:a837eeab3ca6 | 45 | int main() |
shorie | 0:a837eeab3ca6 | 46 | { |
shorie | 0:a837eeab3ca6 | 47 | // I2C is essential to talk with ADAU1361 |
shorie | 0:a837eeab3ca6 | 48 | I2C i2c(D14, D15); |
shorie | 0:a837eeab3ca6 | 49 | |
shorie | 0:a837eeab3ca6 | 50 | // create an audio codec contoler |
shorie | 1:98ddcbbe10ba | 51 | shimabara::UMB_ADAU1361A codec(shimabara::Fs_48, i2c, CODEC_I2C_ADDR ); // Fs can be Fs_32, Fs_441, Fs_48, Fs_96 |
shorie | 0:a837eeab3ca6 | 52 | |
shorie | 0:a837eeab3ca6 | 53 | // create an audio framework by singlton pattern |
shorie | 0:a837eeab3ca6 | 54 | unzen::Framework audio; |
shorie | 0:a837eeab3ca6 | 55 | |
shorie | 0:a837eeab3ca6 | 56 | // Set I3C clock to 100kHz |
shorie | 0:a837eeab3ca6 | 57 | i2c.frequency( 100000 ); |
shorie | 0:a837eeab3ca6 | 58 | |
shorie | 0:a837eeab3ca6 | 59 | |
shorie | 0:a837eeab3ca6 | 60 | // Configure the optional block size of signal processing. By default, it is 1[Sample] |
shorie | 0:a837eeab3ca6 | 61 | // audio.set_block_size(16); |
shorie | 0:a837eeab3ca6 | 62 | |
shorie | 0:a837eeab3ca6 | 63 | |
shorie | 0:a837eeab3ca6 | 64 | // Start the ADAU1361. Audio codec starts to generate the I2C signals |
shorie | 0:a837eeab3ca6 | 65 | codec.start(); |
shorie | 0:a837eeab3ca6 | 66 | |
shorie | 0:a837eeab3ca6 | 67 | // Start the audio framework on ARM processor. |
shorie | 0:a837eeab3ca6 | 68 | audio.start( init_callback, process_callback); // path the initializaiton and process call back to framework |
shorie | 0:a837eeab3ca6 | 69 | |
shorie | 1:98ddcbbe10ba | 70 | codec.set_hp_output_gain( -3, -3 ); |
shorie | 1:98ddcbbe10ba | 71 | codec.set_line_output_gain( -3, -3 ); |
shorie | 0:a837eeab3ca6 | 72 | |
shorie | 0:a837eeab3ca6 | 73 | // periodically changing gain for test |
shorie | 0:a837eeab3ca6 | 74 | while(1) |
shorie | 0:a837eeab3ca6 | 75 | { |
shorie | 1:98ddcbbe10ba | 76 | /* |
shorie | 1:98ddcbbe10ba | 77 | myled1 = 1; |
shorie | 1:98ddcbbe10ba | 78 | wait(0.2); |
shorie | 1:98ddcbbe10ba | 79 | myled1 = 0; |
shorie | 1:98ddcbbe10ba | 80 | wait(0.2); |
shorie | 1:98ddcbbe10ba | 81 | */ |
shorie | 0:a837eeab3ca6 | 82 | } |
shorie | 0:a837eeab3ca6 | 83 | } |