dac - Digital-to-analog conversion

Adapted Air105

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Tip

This library has its own demo,click this link to view the demo example of dac

dac.open(ch, freq, mode)

Open the DAC channel and configure the parameters

Parameters

Incoming Value Type	Explanation
int	Channel number, for example 0
int	Output frequency, unit hz
int	Mode, default 0, reserved

Return Value

return value type	explanation
true	Returns true on success, otherwise false
int	The underlying return value, used for debugging

Examples

if dac.open(0, 44000) then
    log.info("dac", "dac ch0 is opened")
end

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dac.write(ch, data)

Output a waveform from a specified DAC channel, or a single value

Parameters

Incoming Value Type	Explanation
int	Channel number, for example 0
string	If the output fixed value, you can fill in the value, if the output waveform, fill in string

Return Value

return value type	explanation
true	Returns true on success, otherwise false
int	The underlying return value, used for debugging

Examples

if dac.open(0, 44000) then
    log.info("dac", "dac ch0 is opened")
    dac.write(0, string.fromHex("ABCDABCD"))
end
dac.close(0)

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dac.close(ch)

Turn off DAC channel

Parameters

Incoming Value Type	Explanation
int	Channel number, for example 0

Return Value

return value type	explanation
true	Returns true on success, otherwise false
int	The underlying return value, used for debugging

Examples

if dac.open(0, 44000) then
    log.info("dac", "dac ch0 is opened")
    dac.write(0, string.fromHex("ABCDABCD"))
end
dac.close(0)

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