fix(eth): Set the ETH properties at the correct time

[me-no-dev]

This pull request includes several changes to the ETHClass in the libraries/Ethernet/src/ETH.cpp and libraries/Ethernet/src/ETH.h files. The changes primarily focus on adding support for configuring Ethernet settings such as full duplex mode, link speed, and auto-negotiation, as well as ensuring these settings are properly managed during the Ethernet initialization and shutdown processes.

Enhancements to Ethernet Configuration:

• Added new member variables _eth_started, _link_speed, _full_duplex, and _auto_negotiation to the ETHClass to store Ethernet configuration settings.
• Implemented new methods setFullDuplex, setLinkSpeed, and setAutoNegotiation to allow configuration of Ethernet settings before calling ETH.begin(). Each method includes validation to ensure settings are applied correctly. [1] [2] [3]
• Added private methods _setFullDuplex, _setLinkSpeed, and _setAutoNegotiation to apply the settings to the Ethernet hardware.

Initialization and Shutdown Process:

• Modified the ETHClass::begin and ETHClass::beginSPI methods to apply the Ethernet configuration settings (full duplex, link speed, and auto-negotiation) during the initialization process if auto-negotiation is disabled. [1] [2]
• Updated the ETHClass::end method to reset the _eth_started flag when shutting down the Ethernet interface.

Code Refactoring:

• Refactored the ETHClass constructor to initialize the new member variables.
• Ensured that the _eth_started flag is set to true after successful initialization and set to false during shutdown. [1] [2] [3]

Reference: #10923

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[github-actions]

Test Results

 76 files   76 suites   12m 42s ⏱️
 38 tests  38 ✅ 0 💤 0 ❌
241 runs  241 ✅ 0 💤 0 ❌

Results for commit 5c70f49.

♻️ This comment has been updated with latest results.

[github-actions]

Memory usage test (comparing PR against master branch)

The table below shows the summary of memory usage change (decrease - increase) in bytes and percentage for each target.

Memory	FLASH [bytes]		FLASH [%]		RAM [bytes]		RAM [%]
Target	DEC	INC	DEC	INC	DEC	INC	DEC	INC
ESP32P4	0	⚠️ +274	0.00	⚠️ +0.05	0	⚠️ +16	0.00	⚠️ +0.06
ESP32S3	0	⚠️ +180	0.00	⚠️ +0.03	0	0	0.00	0.00
ESP32S2	0	⚠️ +192	0.00	⚠️ +0.03	0	0	0.00	0.00
ESP32C3	0	⚠️ +272	0.00	⚠️ +0.05	0	⚠️ +16	0.00	⚠️ +0.09
ESP32C6	0	⚠️ +274	0.00	⚠️ +0.05	0	0	0.00	0.00
ESP32H2	0	⚠️ +274	0.00	⚠️ +0.05	0	⚠️ +16	0.00	⚠️ +0.08
ESP32	0	⚠️ +200	0.00	⚠️ +0.04	0	0	0.00	0.00

Click to expand the detailed deltas report [usage change in BYTES]

Target	ESP32P4		ESP32S3		ESP32S2		ESP32C3		ESP32C6		ESP32H2		ESP32
Example	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM
libraries/Ethernet/examples/ETH_TLK110	⚠️ +264	⚠️ +16	-	-	-	-	-	-	-	-	-	-	⚠️ +196	0
libraries/Ethernet/examples/ETH_W5500_Arduino_SPI	⚠️ +274	⚠️ +16	⚠️ +180	0	⚠️ +168	0	⚠️ +272	⚠️ +16	⚠️ +274	0	⚠️ +274	⚠️ +16	⚠️ +200	0
libraries/Ethernet/examples/ETH_W5500_IDF_SPI	⚠️ +274	⚠️ +16	⚠️ +180	0	⚠️ +180	0	⚠️ +272	⚠️ +16	⚠️ +274	0	⚠️ +274	⚠️ +16	⚠️ +200	0
libraries/Ethernet/examples/ETH_WIFI_BRIDGE	⚠️ +270	⚠️ +16	⚠️ +176	0	⚠️ +192	0	⚠️ +270	0	⚠️ +270	0	-	-	⚠️ +196	0
libraries/Ethernet/examples/ETH_LAN8720	-	-	-	-	-	-	-	-	-	-	-	-	⚠️ +196	0

[P-R-O-C-H-Y]

LGTM

[SuGlider]

LGTM