音频 :i2s 与pdma 设备树相关

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已于 2022-07-26 14:58:12 修改 · 1.1k 阅读

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于 2022-07-03 18:36:51 首次发布

本文详细介绍了I2S音频接口的工作原理及配置流程，包括引脚设置、Codec参数设置、时钟配置等内容，并总结了数据采集与播放的实现方法及注意事项。

Recording WAVE 'test.wav' : [  137.530635] =========nau8822_set_dai_sysclk clk_id：0,freq:12288000
Signed 16 bit Little Endian, Rat[  137.539005] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@nau8822_hw_params val_len:0x0,val_rate:0x0
e 48000 Hz, Stereo
[  137.550268] =======nau8822_set_bias_level:2
[  137.557970] =======nau8822_set_bias_level:3
[  137.562349] ==============nau8822_mute:0
[  137.567276] =======__snd_pcm_lib_xfer size:6000,data:0x31940,interleaved:1,in_kernel:0
[  137.700319] k510_peridma_interrupt: process Transfer done irq of phy ch0, int_status(1)
[  137.708499] ==========default_read_copy
[  137.713440] =======__snd_pcm_lib_xfer size:6000,data:0x31940,interleaved:1,in_kernel:0
[  137.833330] k510_peridma_interrupt: process Transfer done irq of phy ch0, int_status(1)
[  137.841502] ==========default_read_copy
[  137.846292] =======__snd_pcm_lib_xfer size:6000,data:0x31940,interleaved:1,in_kernel:0
[  137.966340] k510_peridma_interrupt: process Transfer done irq of phy ch0, int_status(1)
[  137.974564] ==========default_read_copy
[  137.979420] =======__snd_pcm_lib_xfer size:6000,data:0x31940,interleaved:1,in_kernel:0
[  138.099356] k510_peridma_interrupt: process Transfer done irq of phy ch0, int_status(1)
[  138.107542] ==========default_read_copy
[  138.112395] =======__snd_pcm_lib_xfer size:6000,data:0x31940,interleaved:1,in_kernel:0
[  138.232371] k510_peridma_interrupt: process Transfer done irq of phy ch0, int_status(1)
[  138.240536] ==========default_read_copy
[  138.245348] =======__snd_pcm_lib_xfer size:6000,data:0x31940,interleaved:1,in_kernel:0
[  138.365401] k510_peridma_interrupt: process Transfer done irq of phy ch0, int_status(1)
[  138.373584] ==========default_read_copy
[  138.378445] =======__snd_pcm_lib_xfer size:6000,data:0x31940,interleaved:1,in_kernel:0
[  138.498411] k510_peridma_interrupt: process Transfer done irq of phy ch0, int_status(1)
[  138.506545] ==========default_read_copy
[  138.511380] =======__snd_pcm_lib_xfer size:6000,data:0x31940,interleaved:1,in_kernel:0
[  138.631423] k510_peridma_interrupt: proc