kopia lustrzana https://github.com/espressif/esp-idf
107 wiersze
2.7 KiB
C
107 wiersze
2.7 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2022 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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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "esp_eth_phy.h"
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#include "esp_eth_mac.h"
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#include "driver/spi_master.h"
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#define CS_HOLD_TIME_MIN_NS 210
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/**
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* @brief ENC28J60 specific configuration
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*
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*/
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typedef struct {
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spi_host_device_t spi_host_id; /*!< SPI peripheral */
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spi_device_interface_config_t *spi_devcfg; /*!< SPI device configuration */
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int int_gpio_num; /*!< Interrupt GPIO number */
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} eth_enc28j60_config_t;
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/**
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* @brief ENC28J60 Supported Revisions
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*
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*/
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typedef enum {
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ENC28J60_REV_B1 = 0b00000010,
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ENC28J60_REV_B4 = 0b00000100,
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ENC28J60_REV_B5 = 0b00000101,
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ENC28J60_REV_B7 = 0b00000110
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} eth_enc28j60_rev_t;
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/**
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* @brief Default ENC28J60 specific configuration
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*
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*/
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#define ETH_ENC28J60_DEFAULT_CONFIG(spi_host, spi_devcfg_p) \
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{ \
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.spi_host_id = spi_host, \
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.spi_devcfg = spi_devcfg_p, \
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.int_gpio_num = 4, \
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}
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/**
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* @brief Compute amount of SPI bit-cycles the CS should stay active after the transmission
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* to meet ENC28J60 CS Hold Time specification.
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*
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* @param clock_speed_mhz SPI Clock frequency in MHz (valid range is <1, 20>)
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* @return uint8_t
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*/
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static inline uint8_t enc28j60_cal_spi_cs_hold_time(int clock_speed_mhz)
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{
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if (clock_speed_mhz <= 0 || clock_speed_mhz > 20) {
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return 0;
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}
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int temp = clock_speed_mhz * CS_HOLD_TIME_MIN_NS;
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uint8_t cs_posttrans = temp / 1000;
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if (temp % 1000) {
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cs_posttrans += 1;
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}
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return cs_posttrans;
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}
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/**
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* @brief Create ENC28J60 Ethernet MAC instance
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*
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* @param[in] enc28j60_config: ENC28J60 specific configuration
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* @param[in] mac_config: Ethernet MAC configuration
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*
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* @return
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* - instance: create MAC instance successfully
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* - NULL: create MAC instance failed because some error occurred
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*/
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esp_eth_mac_t *esp_eth_mac_new_enc28j60(const eth_enc28j60_config_t *enc28j60_config, const eth_mac_config_t *mac_config);
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/**
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* @brief Create a PHY instance of ENC28J60
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*
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* @param[in] config: configuration of PHY
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*
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* @return
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* - instance: create PHY instance successfully
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* - NULL: create PHY instance failed because some error occurred
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*/
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esp_eth_phy_t *esp_eth_phy_new_enc28j60(const eth_phy_config_t *config);
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/**
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* @brief Get ENC28J60 silicon revision ID
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*
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* @param mac ENC28J60 MAC Handle
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* @return eth_enc28j60_rev_t
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* - returns silicon revision ID read during initialization
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*/
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eth_enc28j60_rev_t emac_enc28j60_get_chip_info(esp_eth_mac_t *mac);
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#ifdef __cplusplus
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}
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#endif
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