Zephyr

# Integrating the PRESSURE SENSORS - TRANSDUCERS Driver with custom API

This README provides instructions on how to integrate the provided custom Zephyr device driver for the LPS22HH Pressure Sensors - Transducers into your project.

## 1. File Placement

Place the following files in your Zephyr project's `include/app/drivers` directory:

* `Pressure Sensors - Transducers.h` (Driver header file)
* `Pressure Sensors - Transducers_registers.h` (Register definitions)
* `Pressure Sensors - Transducers_data_types.h` (Data type definitions)

Place the following files in your Zephyr project's `drivers/Pressure Sensors - Transducers` directory:

* `Pressure Sensors - Transducers.c` (Driver source file)
* `Pressure Sensors - Transducers_registers.c` (Register access functions)
* `Kconfig` (Driver's configurations)

Place the following file in your Zephyr project's `dts/bindings/Pressure Sensors - Transducers` directory:

* `Pressure Sensors - Transducers.yaml` (Devicetree binding file)

## 2. Device Tree Overlay

You'll need to create a device tree overlay file (e.g., `app/boards/your_board.overlay`) to instantiate the Pressure Sensors - Transducers driver.

Here's an example:

I2C:

```dts
&i2c1 {
  Pressure Sensors - Transducers@77 {
    status = "okay";
    compatible = "<vendor_nickname>,Pressure Sensors - Transducers";
    reg = <0x77>;
  };
};
```

This overlay adds a Pressure Sensors - Transducers device node on I2C1 bus with address 0x77. Adjust the bus number and address according to your hardware setup.

SPI:

```dts
&spi1 {
  status = "okay";
  cs-gpios = <&gpiob 0 GPIO_ACTIVE_LOW>;

  Pressure Sensors - Transducers@0 {
    status = "okay";
    compatible = "st,Pressure Sensors - Transducers";
    reg = <0>;
    spi-max-frequency = <1000000>;
  };
};
```

This overlay adds a Pressure Sensors - Transducers device node on SPI1 bus with CS-GPIO 0. Adjust the bus number, CS-GPIO and SPI frequency according to your hardware setup.

## 3. CMakeLists.txt Modifications

Create a `drivers/Pressure Sensors - Transducers/CMakeLists.txt` file with the following lines to create a cmake library project:

```cmake
zephyr_library()
zephyr_library_sources_ifdef(CONFIG_Pressure Sensors - Transducers Pressure Sensors - Transducers.c Pressure Sensors - Transducers_registers.c)
```

Update or create if needed the `drivers/CMakeLists.txt` file with thi following line to include the driver's library depending on the configuration:

```cmake
add_subdirectory_ifdef(CONFIG_Pressure Sensors - Transducers Pressure Sensors - Transducers)
```

## 4. Kconfig Integration

To make your driver configurable through Kconfig, you need include your Kconfig file in your `/drivers/Kconfig` file using:

```kconfig
rsource "Pressure Sensors - Transducers/Kconfig"
```

## 5. Usage Example

Here's a simple example of how to use the driver in your application code:

```c
#include <stdio.h>#include <zephyr/kernel.h>#include <app/drivers/Pressure Sensors - Transducers.h>void main(void)
{
    const struct device *const dev = DEVICE_DT_GET_ONE(st_Pressure Sensors - Transducers);

    if (!device_is_ready(dev)) {
        printf("Device %s is not ready.\n", dev->name);
        return 0;
    }

    /* USER CODE BEGIN */

    /* USER CODE END */
}
```