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Frederic Pillon edited this page May 28, 2024
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STM32Ethernet library
The STM32Ethernet library allows an STM32 board to connect to the internet.
It is based on the Ethernet library provides by Arduino.
This library is fully compatible with Arduino Ethernet library (https://www.arduino.cc/en/Reference/Ethernet).
Examples allow a quickstart.
Requirement
This library could only be used with STM32 board with Ethernet compatibility.
Ex:
NUCLEO-F429ZI
STM32F746G-DISCOVERY
The LwIP library must be installed to use the STM32Ethernet library.
Installation
Both libraries are available through the Arduino Libraries manager.
Click on "Sketch" menu and then "Include Library > Manage Libraries..."
Search "LwIP" then install "LwIP" and "STM32Ethernet"
EthernetClass::maintain() in no more required to renew IP address from DHCP.
It is done automatically by the LwIP stack in a background task.
An Idle task is required by the LwIP stack to handle timer and data reception.
This idle task is called inside a timer callback each 1 ms by the
function stm32_eth_scheduler().
A DEFAULT_ETHERNET_TIMER is set in the library to TIM14.
DEFAULT_ETHERNET_TIMER can be redefined in the core variant.
Be careful to not lock the system in a function which disabling IRQ.
Call Ethernet::schedule() performs an update of the LwIP stack.
