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37 lines
1012 B
C
37 lines
1012 B
C
/*
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* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "esp_log.h"
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#include "esp_eth_driver.h"
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#include "eth_phy_regs_struct.h"
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static const char *TAG = "esp_eth.phy";
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esp_err_t esp_eth_detect_phy_addr(esp_eth_mediator_t *eth, int *detected_addr)
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{
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if (!eth || !detected_addr) {
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ESP_LOGE(TAG, "eth and detected_addr can't be null");
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return ESP_ERR_INVALID_ARG;
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}
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int addr_try = 0;
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uint32_t reg_value = 0;
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for (; addr_try < 16; addr_try++) {
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eth->phy_reg_read(eth, addr_try, ETH_PHY_IDR1_REG_ADDR, ®_value);
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if (reg_value != 0xFFFF && reg_value != 0x00) {
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*detected_addr = addr_try;
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break;
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}
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}
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if (addr_try < 16) {
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ESP_LOGD(TAG, "Found PHY address: %d", addr_try);
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return ESP_OK;
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} else {
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ESP_LOGE(TAG, "No PHY device detected");
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return ESP_ERR_NOT_FOUND;
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}
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}
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