24bit 48kHz Audio Delay
Dependencies: mbed-dsp mbed shimabara unzen_nucleo_f746
Fork of unzen_sample_nucleo_f746 by
雲仙フレームワークを使ったオーディオディレイのsampleです。
main.cpp
- Committer:
- GSMCustomEffects
- Date:
- 2016-12-12
- Revision:
- 1:5b735bc30c17
- Parent:
- 0:a837eeab3ca6
- Child:
- 3:d9fd88ea0ff5
File content as of revision 1:5b735bc30c17:
#include "unzen.h" // audio framework include file #include "umb_adau1361a.h" // audio codec contoler include file #include "mbed.h" #include "arm_math.h" #define CODEC_I2C_ADDR 0x38 DigitalOut myled1(LED1); DigitalIn User_b1(PC_13); Serial uart(SERIAL_TX,SERIAL_RX); float32_t delay_buf[1]; float32_t delay_buf1[1]; float32_t delay_buf2[1]; int flag = 1; char uart_read_value = 0; // customer signal processing initialization call back. void init_callback( unsigned int block_size // block size [sample] ) { // place initialization code here } // customer signal processing call back. void process_callback( float rx_left_buffer[], // array of the left input samples float rx_right_buffer[], // array of the right input samples float tx_left_buffer[], // place to write the left output samples float tx_right_buffer[], // place to write the left output samples unsigned int block_size // block size [sample] ) { if(flag == 1){ // Sample processing for ( int i=0; i<block_size; i++) // for all sample { tx_left_buffer[i] = rx_left_buffer[i]; // copy from input to output tx_right_buffer[i] = rx_right_buffer[i]; } } else if(flag == 0){ for ( int i=0; i<block_size; i++) // for all sample { tx_left_buffer[i] = 0; // copy from input to output tx_right_buffer[i] = 0; } } } int main() { // I2C is essential to talk with ADAU1361 I2C i2c(D14, D15); // create an audio codec contoler //shimabara::UMB_ADAU1361A codec(shimabara::Fs_32, i2c, CODEC_I2C_ADDR ); // Default Fs is 48kHz shimabara::UMB_ADAU1361A codec(shimabara::Fs_441, i2c, CODEC_I2C_ADDR ); // shimabara::UMB_ADAU1361A codec(shimabara::Fs_48, i2c, CODEC_I2C_ADDR ); // shimabara::UMB_ADAU1361A codec(shimabara::Fs_96, i2c, CODEC_I2C_ADDR ); // create an audio framework by singlton pattern unzen::Framework audio; // Set I3C clock to 100kHz i2c.frequency( 100000 ); // Configure the optional block size of signal processing. By default, it is 1[Sample] audio.set_block_size(16); // Start the ADAU1361. Audio codec starts to generate the I2C signals codec.start(); // Start the audio framework on ARM processor. audio.start( init_callback, process_callback); // path the initializaiton and process call back to framework // periodically changing gain for test while(1) { delay_buf[0] = 1.0; codec.set_hp_output_gain( 3, 3); codec.set_line_output_gain( 3, 3 ); arm_add_f32( delay_buf, delay_buf1, delay_buf2, 1 ); if(User_b1 == 1){ if(flag == 1){flag = 0;} else if(flag == 0){flag = 1;} if(flag == 1){myled1 =1;uart.printf("Effect On \r\n");} else if(flag == 0){myled1 =0;uart.printf("Effect Off \r\n");} while(User_b1==1){} } if(uart.readable()== 1){uart_read_value = uart.getc(); if(uart_read_value == 'e'){flag = 1;uart.printf("Effect On \r\n");} if(uart_read_value == 'd'){flag = 0;uart.printf("Effect Off \r\n");} } } }