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@@ -64,9 +64,18 @@ data=<gpio>,clk=<gpio>[,dc=<gpio>][,host=1|2]
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### DAC/I2S
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The NVS parameter "dac_config" set the gpio used for i2s communication with your DAC. You can define the defaults at compile time but nvs parameter takes precedence except for SqueezeAMP and A1S where these are forced at runtime. If your DAC also requires i2c, then you must go the re-compile route. Syntax is
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```
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-bck=<gpio>,ws=<gpio>,do=<gpio>[,mute=<gpio>[:0|1][,model=TAS57xx|TAS5713|AC101|I2S][,sda=<gpio>,scl=gpio]
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+bck=<gpio>,ws=<gpio>,do=<gpio>[,mute=<gpio>[:0|1][,model=TAS57xx|TAS5713|AC101|I2S][,i2c=<addr>,sda=<gpio>,scl=gpio]
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```
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-if "model" is not set or is not recognized, then default "I2S" is used.
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+if "model" is not set or is not recognized, then default "I2S" is used. I2C parameters are optional an only needed if your dac requires and I2C control (See 'dac_controlset' below). Note that "i2c" parameters is decimal, hex notation is not allowed.
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+
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+The parameter "dac_controlset" allows definition of simple commands to be sent of i2c for init, power on and off using a JSON syntax:
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+```
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+{ init: [ {"reg":<register>,"val":<value>,"mode":<nothing>|"or"|"and"}, ... {{"reg":<register>,"val":<value>,"mode":<nothing>|"or"|"and"} ],
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+ poweron: [ {"reg":<register>,"val":<value>,"mode":<nothing>|"or"|"and"}, ... {{"reg":<register>,"val":<value>,"mode":<nothing>|"or"|"and"} ],
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+ poweroff: [ {"reg":<register>,"val":<value>,"mode":<nothing>|"or"|"and"}, ... {{"reg":<register>,"val":<value>,"mode":<nothing>|"or"|"and"} ] }
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+```
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+This is standard JSON notation, so if you are not familiar with it, Google is your best friend. Be aware that the '...' means you can have as many entries as you want, it's not part of the syntax. Every section is optional, but tht does not make sense to set i2c in the 'dac_config' parameter and not setting anything here. The parameter 'mode' allows to *or* the register with the value or to *and* it. Don't set 'mode' if you simply want to write. **Note that all values must be decimal**
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+
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### SPDIF
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The NVS parameter "spdif_config" sets the i2s's gpio needed for SPDIF.
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philippe44