> For the complete documentation index, see [llms.txt](https://tk233.gitbook.io/notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tk233.gitbook.io/notes/stm32/connectivity/ethernet/ethernet.md).

# Ethernet - LWIP

## Setting up Ethernet PHY Layer

Under "Connectivity" tab, select ETH.

Set ETH mode to RMII, and make sure the pin mapping corresponds to the one on the Nucleo board

<figure><img src="/files/x1MW6wF2D1a9B6afklTN" alt=""><figcaption></figcaption></figure>

{% tabs %}
{% tab title="NUCLEO-F429ZI" %}

<figure><img src="/files/vwhKherQIJDSAqaf8oh7" alt=""><figcaption></figcaption></figure>

On the F429ZI Nucleo board, the pin mapping should look as follows.

<figure><img src="/files/nlkYW6AkcLRc7pCrgS6e" alt=""><figcaption></figcaption></figure>
{% endtab %}

{% tab title="NUCLEO-H755ZI" %}

<figure><img src="/files/wZwN052TXJC3KBzE7oIO" alt=""><figcaption></figcaption></figure>

On the H755ZI Nucleo board, the pin mapping should look as follows.

<figure><img src="/files/5aUM7xQDRJfph3JZqDwj" alt=""><figcaption></figcaption></figure>
{% endtab %}
{% endtabs %}

## Setting up Middleware LWIP Protocol Layer

Under "Middleware and Software Packs" tab, select LWIP (Lightweight IP).

Enable the Lightweight IP functionality.

The Platform Settings will mark a warning icon. We will configure this at the last step.

<figure><img src="/files/mnOdADUvirgmlAOW4lVM" alt=""><figcaption></figcaption></figure>

Disable DHCP and manually set the IP

<figure><img src="/files/arZ8MiHOVrCJ2En0Duhz" alt=""><figcaption></figcaption></figure>

set MEM\_SIZE to 10K

<figure><img src="/files/OrQm0TvKxXBhT3IOJCdY" alt=""><figcaption></figcaption></figure>

Now, we configure the Platform Settings. For Nucleo 144 boards (F429, H755 etc.), we need to set to LAN8742, which corresponds to the U9 PHY IC on the board.

<figure><img src="/files/m7Wspgb6dI3hVhohX9Wb" alt=""><figcaption></figcaption></figure>

```c
/* USER CODE BEGIN 0 */

extern struct netif gnetif;

/* USER CODE END 0 */

...

  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */


    /* USER CODE BEGIN 3 */
    ethernetif_input(&gnetif);
  }
  /* USER CODE END 3 */

```

## Testing

After configuration, the STM32 should be able to respond to ping requests.

## Reference

{% embed url="<https://controllerstech.com/stm32-ethernet-tutorials/>" %}


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