`esp32-ch390-lwip-station.ino`

Olimex UEXT-CH390: SPI to Ethernet 10/100 Mbps Module for Microcontrollers · File : esp32-ch390-lwip-station.ino · Language : C++ · Use case : Initialiser le CH390 sur ESP32 via ESP-IDF pour une connexion réseau filaire stable avec DHCP.

Example of initializing the CH390 Ethernet driver on ESP32 using the native lwIP stack in ESP-IDF.

Requires ESP-IDF v5.x+. The UEXT-CH390 module is connected via SPI (GPIO 18, 19, 23) with Chip Select on GPIO 5. Ensure you include the adapted CH390 driver in your components folder. Build and flash using idf.py build flash.

esp32-ch390-lwip-station.ino

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_netif.h"
#include "esp_eth.h"
#include "esp_event.h"
#include "esp_log.h"
#include "driver/gpio.h"
#include "driver/spi_master.h"

// Configuration matérielle Olimex UEXT-CH390 sur ESP32
#define PIN_CS        GPIO_NUM_5
#define PIN_INT       GPIO_NUM_4
#define PIN_RST       GPIO_NUM_18
#define SPI_HOST      SPI2_HOST
#define SPI_CLK       GPIO_NUM_18
#define SPI_MOSI      GPIO_NUM_23
#define SPI_MISO      GPIO_NUM_19

static const char *TAG = "CH390_ETH";

static void eth_event_handler(void *arg, esp_event_base_t event_base, int32_t event_id, void *event_data) {
    if (event_id == ETHERNET_EVENT_CONNECTED) {
        ESP_LOGI(TAG, "Ethernet Link Up");
    } else if (event_id == ETHERNET_EVENT_DISCONNECTED) {
        ESP_LOGI(TAG, "Ethernet Link Down");
    }
}

static void ip_event_handler(void *arg, esp_event_base_t event_base, int32_t event_id, void *event_data) {
    if (event_id == IP_EVENT_ETH_GOT_IP) {
        esp_netif_ip_info_t info;
        esp_netif_get_ip_info(esp_netif_get_handle_from_ifkey("ETH"), &info);
        ESP_LOGI(TAG, "Got IP: " IPSTR, IP2STR(&info.ip));
    }
}

void app_main(void) {
    esp_netif_init();
    esp_event_loop_create_default();
    esp_netif_create_default_ethernet_netif();

    esp_eth_config_t config = ETH_DEFAULT_CONFIG();
    // Note: Le pilote CH390 spécifique doit être ajouté au projet ESP-IDF
    // config.driver = &esp_eth_ch390_driver;
    // config.mac_addr = {0x02, 0x11, 0x22, 0x33, 0x44, 0x55}; // MAC usine ou custom

    esp_eth_handle_t eth_handle;
    ESP_ERROR_CHECK(esp_eth_driver_install(&config, &eth_handle));
    esp_netif_attach(esp_netif_get_handle_from_ifkey("ETH"), eth_handle);

    esp_event_handler_register(ETH_EVENT, ESP_EVENT_ANY_ID, &eth_event_handler, NULL);
    esp_event_handler_register(IP_EVENT, IP_EVENT_ETH_GOT_IP, &ip_event_handler, NULL);

    esp_eth_start(eth_handle);
}

← Back to the board