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- function audio_init()
- pm.ioVol(pm.IOVOL_ALL_GPIO, 3300)
- local multimedia_id = 0
- local i2s_id = 0
- local i2s_mode = 0
- local i2s_sample_rate = 16000
- local i2s_bits_per_sample = 16
- local i2s_channel_format = i2s.MONO_R
- local i2s_communication_format = i2s.MODE_LSB
- local i2s_channel_bits = 16
- --air8000 core开发版+音频小板配置
- local voice_vol = 60 --音频小板喇叭太容易失真了，不能太大
- local i2c_id = 0
- local pa_pin = 162 -- 喇叭pa功放脚
- local pa_on_level = 1
- local pa_delay = 200
- local dac_power_pin = 164
- local dac_power_on_level = 1
- local dac_power_off_delay = 600
- gpio.setup(24, 1) --air8000的I2C0需要拉高gpio24才能用
- gpio.setup(26, 0)
- i2c.setup(0, i2c.FAST)
- gpio.setup(24, 1, gpio.PULLUP) -- i2c工作的电压域
- sys.wait(100)
- gpio.setup(dac_power_pin, 1, gpio.PULLUP) -- 打开音频编解码供电
- gpio.setup(pa_pin, 1, gpio.PULLUP) -- 打开音频放大器
- audio.on(0, audio_callback)
- i2s.setup(i2s_id, i2s_mode, i2s_sample_rate, i2s_bits_per_sample, i2s_channel_format, i2s_communication_format,i2s_channel_bits)
- audio.config(multimedia_id, pa_pin, pa_on_level, 0, pa_delay, dac_power_pin, dac_power_on_level, dac_power_off_delay)
- audio.setBus(multimedia_id, audio.BUS_I2S,{chip = "es8311",i2cid = i2c_id , i2sid = i2s_id}) --通道0的硬件输出通道设置为I2S
- audio.vol(multimedia_id, voice_vol)
- audio.micVol(multimedia_id, 75)
- end
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