ADC Multiplexer#
Soft Driver#
Defined in namespace hal::soft
#include <libhal-soft/adc_mux.hpp>
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class adc_multiplexer#
A driver for an ADC multiplexer that manages and reads ADC mux pins. This driver is intended to be used with multiplexers that use digital signals. An ADC multiplexer can be used to expand the number of input channels of an ADC.
Public Functions
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hal::result<hal::adc::read_t> read_channel(std::uint16_t p_mux_port)#
Reads a channel on the mux.
- Parameters:
p_mux_port – The port to be read. If an out of bounds port number is passed, an error-typed result is returned.
- Returns:
The hal::adc::read_t struct of the read value or an error if an invalid port is given.
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int get_max_channel()#
Gets the highest capacity channel held by the ADC mux object. This is calculated based off of how many source pins are available.
- Returns:
The maximum channel number for this mux (2^n states, where n is number of source pins).
Public Static Functions
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static adc_multiplexer create(std::span<hal::output_pin*> p_signal_pins, hal::adc &p_source_pin, hal::steady_clock &p_clock)#
Constructs a new adc_multiplexer object.
- Parameters:
p_signal_pins – A span of the output signal pins used to determine the channel on the mux.
p_source_pin – The output adc pin of the multiplexer.
p_clock – A steady clock used for delaying 500ns to give time to the mux to have an updated signal.
- Returns:
The constructed adc_multiplexer.
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hal::result<hal::adc::read_t> read_channel(std::uint16_t p_mux_port)#
- group AdcMux
Functions
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result<adc_mux_pin> make_adc(adc_multiplexer &p_multiplexer, std::uint8_t p_channel)#
Returns an ADC pin from the multiplexer.
- Parameters:
p_multiplexer – the adc multiplexer with the desire adc channel pin
p_channel – The channel number of the pin
- Throws:
std::errc::result_out_of_range – if p_channel greater than the available number of channels in the multiplexer.
- Returns:
A newly constructed ADC multiplexer pin.
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result<adc_mux_pin> make_adc(adc_multiplexer &p_multiplexer, std::uint8_t p_channel)#