cd74hc4067's Introduction

CD74HC4067

STM32 LL(Low Layer) library for the CD74HC4067 High Speed CMOS 16-Channel Analog Multiplexer/Demultiplexer.

Features

No HAL dependencies
Lightweight design
Easy to use

Trade-offs

Single GPIO port for all pins

Add as CPM project dependency

How to add CPM to the project, check the link

# For Clion STM32 plugin generated Cmake add
CPMAddPackage(
        NAME CD74HC4067
        GITHUB_REPOSITORY ximtech/CD74HC4067
        GIT_TAG origin/main)

include_directories(${CD74HC4067_DIRECTORY}) # add directory to project
file(GLOB_RECURSE SOURCES ${CD74HC4067_SOURCES}) # add source files

Wiring

Usage

LED with multiplexer

    Multiplexer *mux = initMultiplexer(GPIOA, MUX_S0_Pin, MUX_S1_Pin, MUX_S2_Pin, MUX_S3_Pin, MUX_ENABLE_Pin, MUX_SIGNAL_Pin);
    setEnableMultiplexer(mux, true);   // by default disabled

    while (1) {
        writeMultiplexer(mux, MUX_CHANNEL_0, MUX_HIGH);
        for (MultiplexerChannel i = MUX_CHANNEL_0; i < MUX_CHANNEL_15; i++) {
            LL_mDelay(100);
            writeMultiplexer(mux, i, MUX_LOW);
            writeMultiplexer(mux, i + 1, MUX_HIGH);
        }

        LL_mDelay(100);
        writeMultiplexer(mux, MUX_CHANNEL_15, MUX_LOW);
    }
}

Input data

    Multiplexer *mux = initMultiplexer(GPIOA, MUX_S0_Pin, MUX_S1_Pin, MUX_S2_Pin, MUX_S3_Pin, MUX_ENABLE_Pin, 0);
    setEnableMultiplexer(mux, true);
    setMultiplexerChannel(mux, MUX_CHANNEL_1); // select channel
    uint32_t adcValue = readADC();  // use signal value

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