ESP IO Expander Chip TCA9539 and TCA9555

Implementation of the TCA9539 and TCA9555 io expander chip with esp_io_expander component.

Chip	Communication interface	Component name	Link to datasheet
TCA9539	I2C	esp_io_expander_tca95xx_16bit	datasheet
TCA9555	I2C	esp_io_expander_tca95xx_16bit	datasheet

Add to project

Packages from this repository are uploaded to Espressif's component service. You can add them to your project via idf.py add-dependency, e.g.

Plaintext

    idf.py add-dependency esp_io_expander_tca95xx_16bit==1.0.0

Alternatively, you can create idf_component.yml. More is in Espressif's documentation.

Example use

Creation of the i2c bus.

    i2c_master_bus_handle_t i2c_handle = NULL;
    const i2c_master_bus_config_t bus_config = {
        .i2c_port = I2C_NUM_0,
        .sda_io_num = 47,
        .scl_io_num = 48,
        .clk_source = I2C_CLK_SRC_DEFAULT,
    };
    i2c_new_master_bus(&bus_config, &i2c_handle);

Creation of the component.

    esp_io_expander_handle_t io_expander = NULL;
    esp_io_expander_new_i2c_tca95xx_16bit(i2c_handle, ESP_IO_EXPANDER_I2C_TCA9539_ADDRESS_00, &io_expander);

Print all pins's status to the log:

    esp_io_expander_print_state(io_expander);

Set pin 0 and pin 1 with output dircetion and low level:

    esp_io_expander_set_dir(io_expander, IO_EXPANDER_PIN_NUM_0 | IO_EXPANDER_PIN_NUM_1, IO_EXPANDER_OUTPUT);
    esp_io_expander_set_level(io_expander, IO_EXPANDER_PIN_NUM_0 | IO_EXPANDER_PIN_NUM_1, 0);

Set pin 2 and pin 3 with input dircetion:

    uint32_t pin_levels = 0;
    esp_io_expander_set_dir(io_expander, IO_EXPANDER_PIN_NUM_2 | IO_EXPANDER_PIN_NUM_3, IO_EXPANDER_INPUT);
    esp_io_expander_get_level(io_expander, IO_EXPANDER_PIN_NUM_2 | IO_EXPANDER_PIN_NUM_3, &pin_levels);

espressif/esp_io_expander_tca95xx_16bit

readme

ESP IO Expander Chip TCA9539 and TCA9555

Add to project

Example use

Links

Supports all targets

License: Apache-2.0

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