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managed_components/espressif__esp_io_expander_tca9554/README.md

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+# ESP IO Expander Chip TCA9554(A)
+
+[![Component Registry](https://components.espressif.com/components/espressif/esp_io_expander_tca9554/badge.svg)](https://components.espressif.com/components/espressif/esp_io_expander_tca9554)
+
+Implementation of the TCA9554 io expander chip with esp_io_expander component.
+
+| Chip             | Communication interface | Component name | Link to datasheet |
+| :--------------: | :---------------------: | :------------: | :---------------: |
+| TCA9554(A)       | I2C                     | esp_io_expander_tca9554 | [datasheet](https://www.ti.com/lit/gpn/tca9554) |
+
+## Add to project
+
+Packages from this repository are uploaded to [Espressif's component service](https://components.espressif.com/).
+You can add them to your project via `idf.py add-dependency`, e.g.
+```
+    idf.py add-dependency esp_io_expander_tca9554==1.0.0
+```
+
+Alternatively, you can create `idf_component.yml`. More is in [Espressif's documentation](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-component-manager.html).
+
+## Example use
+
+Creation of the i2c bus.
+
+```c
+    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.
+
+```c
+    esp_io_expander_handle_t io_expander = NULL;
+    esp_io_expander_new_i2c_tca9554(i2c_handle, ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_000, &io_expander);
+```
+
+Print all pins's status to the log:
+
+```c
+    esp_io_expander_print_state(io_expander);
+```
+
+Set pin 0 and pin 1 with output dircetion and low level:
+
+```c
+    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:
+
+```c
+    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);
+```