Audprc Example

Source code path: example/rt_device/audprc

Supported Platforms

  • eh-lb525

  • sf32lb52-lcd_n16r8

  • ec-lb587

Overview

In this example, Audprc is used together with Audcodec, including:

  • Mic recording.

  • Playing recordings through speaker.

  • Loopback (simultaneous recording and playback).

Example Usage

Hardware Requirements

Before running this example, you need to prepare:

Compilation and Flashing

Switch to the example project directory and run scons command to compile:

> scons --board=eh-lb525 -j32

Switch to the example project/build_xx directory and run uart_download.bat, select the port as prompted to download:

$ ./uart_download.bat

     Uart Download

please input the serial port num:5

For detailed steps on compilation and downloading, please refer to the relevant introduction in Quick Start.

Expected Results of Example

In this example, recording and playback are operated through FINSH commands:

Purpose

Command

Example

Notes

Recording

audprc rx [channels:1/2] [sample rate] [sample bits]

audprc rx 1 16000 16

Recording stored in ram buffer (recording automatically stops after 1M)

Play recording

audprc tx [channels:1/2] [sample rate] [sample bits]

audprc tx 1 16000 16

Playback data from ram buffer (need to record first)

Loopback

audprc txrx [rx channels:1/2] [rx sample rate] [rx sample bits] [tx channels:1/2] [tx sample rate] [tx sample bits]

audprc rxtx 1 16000 16 1 16000 16

Simultaneous recording (mic) and playback (speaker) (Before executing recording and playback commands, if Loopback is running, need to stop first.)

Stop Loopback

audprc txrxstop

audprc txrxstop

Stop Loopback

Serial port output as follows:

// Input command, start recording
01-23 11:04:27:099 TX:audprc rx 1 16000 16
01-23 11:04:27:105    audprc_rx_entry
01-23 11:04:27:136    codec input parameter:sub_type=4 channels 1, rate 16000, bits 16mic input:rx channel 0, channels 1, rate 16000, bitwidth 16get_mic_volume = 0db
01-23 11:04:27:141    get_mic_volume = 0db
01-23 11:04:27:143    start_rx
01-23 11:04:27:147    [I/drv.audcodec] pll config state:1, samplerate:0 


// Recording ram buffer full 1M, stop recording
01-23 11:04:59:936    Record finished.
01-23 11:04:59:939    RX finished.
01-23 11:04:59:941    stop_rx
01-23 11:04:59:943    [I/drv.audcodec] bf0_audio_stop 0x401
01-23 11:04:59:954    [I/drv.audcodec] audcodec close adc
01-23 11:04:59:957    [I/drv.audcodec] bf0_audio_stop 0x401 done
01-23 11:04:59:958    [I/drv.audprc] bf0_audio_stop 0x1001
01-23 11:04:59:960    [I/drv.audprc] audprc close adc/dac
01-23 11:04:59:962    [I/drv.audprc] bf0_audio_stop 0x1001 done


// Input command, play recording file
01-23 11:05:38:083 TX:audprc tx 1 16000 16
01-23 11:05:38:096    audprc_tx_entry
01-23 11:05:38:097    prc_codec : sub_type=1 channel 1, samplerate 16000, bits 16speaker OUTPUTSRC channel=1 in_rate=16000 out_rate=16000speaker select=0x5050 mixer=0x5150tx[0]: sub_type 0, ch 1, samrate 16000, bits 16
01-23 11:05:38:099    init volume=-18[I/drv.audcodec] dac set volume: prc=0 codec=-18
01-23 11:05:38:100    start_tx
01-23 11:05:38:102    [I/drv.audcodec] codec dac mute set:1
01-23 11:05:38:103    [I/drv.audcodec] pll config state:1, samplerate:0 
01-23 11:05:38:105    [I/drv.audprc] samplerate = 16000, select voice eq
01-23 11:05:38:106    [I/drv.audprc] -----tx dma size = 320
01-23 11:05:38:108    sifli_aw8155 to do power handle 
01-23 11:05:38:110    sifli_aw8155_start,mode:1 10
01-23 11:05:38:126    [I/drv.audcodec] codec dac mute set:0


// Playback complete
01-23 11:06:10:858    Play finished.
01-23 11:06:10:861    Play finished.
01-23 11:06:10:863    stop_tx
01-23 11:06:10:864    [I/drv.audcodec] bf0_audio_stop 0x100
01-23 11:06:10:866    [I/drv.audcodec] audcodec close dac
01-23 11:06:10:867    [I/drv.audcodec] bf0_audio_stop 0x100 done
01-23 11:06:10:869    [I/drv.audprc] bf0_audio_stop 0x100
01-23 11:06:10:870    [I/drv.audprc] audprc close adc/dac
01-23 11:06:10:871    [I/drv.audprc] bf0_audio_stop 0x100 done
01-23 11:06:10:875    sifli_aw8155_stop 


// Input command, start loopback
01-23 11:06:14:524 TX:audprc txrx 1 16000 16 1 16000 16
01-23 11:06:14:533    example_audprc_tx_rx
01-23 11:06:14:540    audprc_rx_tx_entry
01-23 11:06:14:569    codec input parameter:sub_type=4 channels 1, rate 16000, bits 16mic input:rx channel 0, channels 1, rate 16000, bitwidth 16get_mic_volume = 0db
01-23 11:06:14:571    get_mic_volume = 0db
01-23 11:06:14:573    prc_codec : sub_type=1 channel 1, samplerate 16000, bits 16speaker OUTPUTSRC channel=1 in_rate=16000 out_rate=16000speaker select=0x5050 mixer=0x5150tx[0]: sub_type 0, ch 1, samrate 16000, bits 16
01-23 11:06:14:575    init volume=-18[I/drv.audcodec] dac set volume: prc=0 codec=-18
01-23 11:06:14:576    start_txrx
01-23 11:06:14:578    [I/drv.audcodec] codec dac mute set:1
01-23 11:06:14:579    [I/drv.audcodec] pll config state:1, samplerate:0 
01-23 11:06:14:594    [I/drv.audprc] samplerate = 16000, select voice eq
01-23 11:06:14:596    [I/drv.audprc] -----tx dma size = 320
01-23 11:06:14:598    sifli_aw8155 to do power handle 
01-23 11:06:14:598    sifli_aw8155_start,mode:1 10
01-23 11:06:14:623    [I/drv.audcodec] codec dac mute set:0


// Input command, stop loopback
01-23 11:06:21:132 TX:audprc txrxstop
01-23 11:06:21:141    example_audprc_tx_rx_stop
01-23 11:06:21:144    [I/drv.audcodec] bf0_audio_stop 0x502
01-23 11:06:21:146    [I/drv.audcodec] audcodec close dac
01-23 11:06:21:147    [I/drv.audcodec] audcodec close adc
01-23 11:06:21:149    [I/drv.audcodec] bf0_audio_stop 0x502 done
01-23 11:06:21:150    [I/drv.audprc] bf0_audio_stop 0x1102
01-23 11:06:21:152    [I/drv.audprc] audprc close adc/dac
01-23 11:06:21:153    [I/drv.audprc] bf0_audio_stop 0x1102 done
01-23 11:06:21:156    sifli_aw8155_stop

Exception Diagnosis

Reference Documents

Update History

Version

Date

Release Notes

0.0.1

12/2024

Initial version