【新手基础教程】片上外设之 I2S（集成电路内置音频总线...
本帖最后由 猪百岁 于 2021-3-31 21:09 编辑# I2S（集成电路内置音频总线）的使用
关于 I2S 音频总线详细介绍请参考(https://cn.maixpy.sipeed.com/zh/api_reference/Maix/i2s.html).
## 1. 使用方法
- 从 Maix 导入 I2S 模块
```
from Maix import I2S
```
- 创建 I2S 对象
```
i2s_dev = I2S(device_num)
```
- 配置参数
```
i2s_dev.channel_config(rx.CHANNEL_0, rx.RECEIVER, align_mode = I2S.STANDARD_MODE)
i2s_dev.set_sample_rate(sample_rate)
```
- 读取或播放数据
```
i2s_dev.record(256)#sampling points number must be smaller than 256
```
## 2. 例程
采集数据并直接播放
```
from Maix import I2S
import time
from fpioa_manager import *
fm.register(20,fm.fpioa.I2S0_IN_D0)#GO
fm.register(19,fm.fpioa.I2S0_WS)
fm.register(18,fm.fpioa.I2S0_SCLK)
fm.register(34,fm.fpioa.I2S2_OUT_D1)
fm.register(35,fm.fpioa.I2S2_SCLK)
fm.register(33,fm.fpioa.I2S2_WS)
sample_rate = 44*1000
rx = I2S(I2S.DEVICE_0)
rx.channel_config(rx.CHANNEL_0, rx.RECEIVER, align_mode = I2S.STANDARD_MODE)
rx.set_sample_rate(sample_rate)
tx = I2S(I2S.DEVICE_2)
tx.channel_config(tx.CHANNEL_1, tx.TRANSMITTER, align_mode = I2S.RIGHT_JUSTIFYING_MODE)
tx.set_sample_rate(sample_rate)
while True:
audio = rx.record(256)#sampling points number must be smaller than 256
tx.play(audio)
```
页:
[1]