wled_ethernet.h

#ifndef WLED_ETHERNET_H
#define WLED_ETHERNET_H

#ifdef WLED_USE_ETHERNET
#include "pin_manager.h"

// For ESP32, the remaining five pins are at least somewhat configurable.
// eth_address  is in range [0..31], indicates which PHY (MAC?) address should be allocated to the interface
// eth_power    is an output GPIO pin used to enable/disable the ethernet port (and/or external oscillator)
// eth_mdc      is an output GPIO pin used to provide the clock for the management data
// eth_mdio     is an input/output GPIO pin used to transfer management data
// eth_type     is the physical ethernet module's type (ETH_PHY_LAN8720, ETH_PHY_TLK110)
// eth_clk_mode defines the GPIO pin and GPIO mode for the clock signal
//              However, there are really only four configurable options on ESP32:
//              ETH_CLOCK_GPIO0_IN    == External oscillator, clock input  via GPIO0
//              ETH_CLOCK_GPIO0_OUT   == ESP32 provides 50MHz clock output via GPIO0
//              ETH_CLOCK_GPIO16_OUT  == ESP32 provides 50MHz clock output via GPIO16
//              ETH_CLOCK_GPIO17_OUT  == ESP32 provides 50MHz clock output via GPIO17
typedef struct EthernetSettings {
  uint8_t        eth_address;
  int            eth_power;
  int            eth_mdc;
  int            eth_mdio;
  eth_phy_type_t eth_type;
  eth_clock_mode_t eth_clk_mode;
} ethernet_settings;

const ethernet_settings ethernetBoards[] = {
  // None
  {
  },
  
  // WT32-EHT01
  // Please note, from my testing only these pins work for LED outputs:
  //   IO2, IO4, IO12, IO14, IO15
  // These pins do not appear to work from my testing:
  //   IO35, IO36, IO39
  {
    1,                 // eth_address, 
    16,                // eth_power, 
    23,                // eth_mdc, 
    18,                // eth_mdio, 
    ETH_PHY_LAN8720,   // eth_type,
    ETH_CLOCK_GPIO0_IN // eth_clk_mode
  },

  // ESP32-POE
  {
     0,                  // eth_address, 
    12,                  // eth_power, 
    23,                  // eth_mdc, 
    18,                  // eth_mdio, 
    ETH_PHY_LAN8720,     // eth_type,
    ETH_CLOCK_GPIO17_OUT // eth_clk_mode
  },

   // WESP32
  {
    0,			              // eth_address,
    -1,			              // eth_power,
    16,			              // eth_mdc,
    17,			              // eth_mdio,
    ETH_PHY_LAN8720,      // eth_type,
    ETH_CLOCK_GPIO0_IN	  // eth_clk_mode
  },

  // QuinLed-ESP32-Ethernet
  {
    0,			              // eth_address,
    5,			              // eth_power,
    23,			              // eth_mdc,
    18,			              // eth_mdio,
    ETH_PHY_LAN8720,      // eth_type,
    ETH_CLOCK_GPIO17_OUT	// eth_clk_mode
  },

  // TwilightLord-ESP32 Ethernet Shield
  {
    0,			              // eth_address,
    5,			              // eth_power,
    23,			              // eth_mdc,
    18,			              // eth_mdio,
    ETH_PHY_LAN8720,      // eth_type,
    ETH_CLOCK_GPIO17_OUT	// eth_clk_mode
  },

  // ESP3DEUXQuattro
  {
    1,                    // eth_address, 
    -1,                   // eth_power, 
    23,                   // eth_mdc, 
    18,                   // eth_mdio, 
    ETH_PHY_LAN8720,      // eth_type,
    ETH_CLOCK_GPIO17_OUT  // eth_clk_mode
  }
};
#endif

#define WLED_ETH_RSVD_PINS_COUNT 6
// The following six pins are neither configurable nor
// can they be re-assigned through IOMUX / GPIO matrix.
// See https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/esp32/get-started-ethernet-kit-v1.1.html#ip101gri-phy-interface
const managed_pin_type esp32_nonconfigurable_ethernet_pins[WLED_ETH_RSVD_PINS_COUNT] = {
    { 21, true  }, // RMII EMAC TX EN  == When high, clocks the data on TXD0 and TXD1 to transmitter
    { 19, true  }, // RMII EMAC TXD0   == First bit of transmitted data
    { 22, true  }, // RMII EMAC TXD1   == Second bit of transmitted data
    { 25, false }, // RMII EMAC RXD0   == First bit of received data
    { 26, false }, // RMII EMAC RXD1   == Second bit of received data
    { 27, true  }, // RMII EMAC CRS_DV == Carrier Sense and RX Data Valid
};

#endif