第一次提交：完成了网关的单路485数据采集，还有以太网链接和MQTT配置，实现数据上报和命令下发，差一个断网储存

components/ETH_CH390H/include/esp_eth_phy_ch390.h

@@ -0,0 +1,32 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * SPDX-FileContributor: 2024 Sergey Kharenko
+ * SPDX-FileContributor: 2024 Espressif Systems (Shanghai) CO LTD
+ */
+
+#pragma once
+
+#include "esp_eth_com.h"
+#include "esp_eth_phy.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+* @brief Create a PHY instance of CH390
+*
+* @param[in] config: configuration of PHY
+*
+* @return
+*      - instance: create PHY instance successfully
+*      - NULL: create PHY instance failed because some error occurred
+*/
+esp_eth_phy_t *esp_eth_phy_new_ch390(const eth_phy_config_t *config);
+
+#ifdef __cplusplus
+}
+#endif