STM32F4-Base/Drivers/BSP/CH395F/ch395f.c

/*
 * 模��称：CH395F SPI Ethernet Protocol Stack Driver
 * 模�功能：CH395F 以太网�议栈芯片 SPI 驱动实现，�供芯片检测��始化� *          网络�数�置�PHY 管��DHCP�Socket 管��数�收�功� * 适用平�：STM32F4 系列（SPI2 接�� * 作者：王建� * 创建日期�026-03-14
 * 修改记录� *     2026-03-14  王建� 创建�始版本，按代�规范�构
 *     2026-07-18  王建� 改�?write_send_buf / read_recv_buf 使用 SPI2 DMA 批�传输
 */

/* 头文件包�区 - 先包�系统头文件，�包�本模�头文件 */
#include <string.h>
#include <stdio.h>
#include "ch395f.h"
#include "spi.h"
#include "usart.h"

/*
 * 调试输出�置
 */
#define DBG_TAG "[CH395]"
#include "dbg_log.h"

/*
 * �有�定义区
 */
#define CH395F_CHECK_EXIST_TEST_DATA   0x57U  /* 芯片检测测试字�*/
#define CH395F_RESET_DELAY_MS          20U    /* ���等待延时（ms�*/
#define CH395F_INIT_TIMEOUT_MS         500U   /* �始化超时时间（ms�*/
#define CH395F_SPI_BEGIN_DELAY_MS      1U     /* SPI 事务开始延时（ms�*/
#define CH395F_DMA_BUF_SIZE            1500U  /* DMA 缓冲区最大字节数 */

/*
 * �有���- DMA 传输相关
 */
static volatile uint8_t s_spi2_dma_done = 0U;   /* DMA 传输完�标志 */

__attribute__((aligned(4)))
static uint8_t s_spi2_dma_tx_buf[CH395F_DMA_BUF_SIZE]; /* DMA ��缓冲区 */
__attribute__((aligned(4)))
static uint8_t s_spi2_dma_rx_buf[CH395F_DMA_BUF_SIZE]; /* DMA 接收缓冲�*/

/*
 * �有函数声明� */
static void ch395f_spi_begin(void);
static void ch395f_spi_end(void);
static void ch395f_spi_dma_transfer(uint16_t len);

/*
 * �有函数实现� */

/*
 * 函数功能：开�SPI 事务（CS 拉高 -> 拉低� * 函数说明：手册��SPI 模�下字节间无需间隔� *          CS 拉高�拉低满足最�片选间隔�� */
static void ch395f_spi_begin(void) {
    /* CS 先拉高，确�空闲状�?*/
    HAL_GPIO_WritePin(CH395_SCS_GPIO_Port, CH395_SCS_Pin, GPIO_PIN_SET);
    /* CS 拉低，�动事务（无需�外延时，SPI 时��SCK 频率决定�*/
    HAL_GPIO_WritePin(CH395_SCS_GPIO_Port, CH395_SCS_Pin, GPIO_PIN_RESET);
}

/*
 * 函数功能：结�SPI 事务（CS 拉高� */
static void ch395f_spi_end(void) {
    /* CS 拉高，结�事�*/
    HAL_GPIO_WritePin(CH395_SCS_GPIO_Port, CH395_SCS_Pin, GPIO_PIN_SET);
}

/*
 * 函数功能：DMA 全�工传输并等待完�
 * 入��数：len - 传输字节� uint16_t
 * 函数说明：��s_spi2_dma_tx_buf，接收到 s_spi2_dma_rx_buf� *          阻塞等待 DMA 完�回调置�标志
 */
static void ch395f_spi_dma_transfer(uint16_t len) {
    HAL_StatusTypeDef status;
    uint32_t tickstart;
    volatile uint32_t loop_cnt = 0U;

    s_spi2_dma_done = 0U;
    status = HAL_SPI_TransmitReceive_DMA(&hspi2, s_spi2_dma_tx_buf, s_spi2_dma_rx_buf, len);
    if (status != HAL_OK) {
        DBG_ERROR("HAL_SPI_TransmitReceive_DMA FAIL: %d, SPI_State=%d, SPI_Error=0x%lX, DMA_State=%d",
                  (int)status,
                  (int)hspi2.State,
                  hspi2.ErrorCode,
                  (int)hspi2.hdmarx->State);
        return;
    }

    tickstart = HAL_GetTick();
    while (s_spi2_dma_done == 0U) {
        loop_cnt++;
        if ((HAL_GetTick() - tickstart) > 1000U) {
            DBG_ERROR("TIMEOUT after 1s, len=%d, loop=%lu, SPI_State=%d, SPI_Error=0x%lX",
                      (int)len, loop_cnt,
                      (int)hspi2.State,
                      hspi2.ErrorCode);
            DBG_ERROR("  DMA_RX: State=%d, Dir=%lu, CNT=%lu",
                      (int)hspi2.hdmarx->State,
                      hspi2.hdmarx->Init.Direction,
                      __HAL_DMA_GET_COUNTER(hspi2.hdmarx));
            DBG_ERROR("  DMA_TX: State=%d, Dir=%lu, CNT=%lu",
                      (int)hspi2.hdmatx->State,
                      hspi2.hdmatx->Init.Direction,
                      __HAL_DMA_GET_COUNTER(hspi2.hdmatx));
            DBG_ERROR("  SPI2_CR1=0x%lX, CR2=0x%lX, SR=0x%lX",
                      SPI2->CR1, SPI2->CR2, SPI2->SR);
            /* 强制�� SPI2 DMA 状�，��死� */
            HAL_SPI_Abort(&hspi2);
            return;
        }
    }

    /* 检查传输是��功：SPI 错误�必须为 0 */
    if (hspi2.ErrorCode != 0U) {
        DBG_INFO("SPI DMA done with errors: ErrorCode=0x%lX, SPI_State=%d",
                 hspi2.ErrorCode, (int)hspi2.State);
        __HAL_SPI_CLEAR_OVRFLAG(&hspi2);
    }
}

/*
 * 函数功能：SPI 收�完�回调
 * 函数说明：由 HAL SPI 驱动�DMA TX+RX 完��调用（HAL_SPI_TransmitReceive_DMA 触�此回调）
 */
void HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi) {
    if (hspi->Instance == SPI2) {
        s_spi2_dma_done = 1U;
    }
}

/*
 * 函数功能：SPI 错误回调
 * 函数说明：由 HAL SPI 驱动�DMA 传输出错时调用，释放等待
 */
void HAL_SPI_ErrorCallback(SPI_HandleTypeDef *hspi) {
    if (hspi->Instance == SPI2) {
        s_spi2_dma_done = 1U;
    }
}

/*
 * 公共函数实现� */

/*
 * 函数功能：� CH395 写入命令字节
 * 入��数：cmd - 命令� uint8_t  0x00 - 0xFF
 * 返回值：命令�回显�? uint8_t
 * �定�件：需�ch395f_spi_begin() �ch395f_spi_end() 之间调用
 * 函数说明：SPI 模�下命令与数�之间无需间隔
 */
uint8_t ch395f_write_cmd(uint8_t cmd) {
    uint8_t rx_data;

    /* 通过 SPI ��命令并接收回显 */
    HAL_SPI_TransmitReceive(&hspi2, &cmd, &rx_data, 1, HAL_MAX_DELAY);
    return rx_data;
}

/*
 * 函数功能：� CH395 写入数�字节
 * 入��数：data - 数�字节  uint8_t  0x00 - 0xFF
 * 返回值：数�回显� uint8_t
 * �定�件：需�ch395f_spi_begin() �ch395f_spi_end() 之间调用
 */
uint8_t ch395f_write_data(uint8_t data) {
    uint8_t rx_data;

    /* 通过 SPI ��数�并接收回显 */
    HAL_SPI_TransmitReceive(&hspi2, &data, &rx_data, 1, HAL_MAX_DELAY);
    return rx_data;
}

/*
 * 函数功能：从 CH395 读�数�字节
 * 返回值：接收到的数�字节  uint8_t
 * �定�件：需�ch395f_spi_begin() �ch395f_spi_end() 之间调用
 */
uint8_t ch395f_read_data(void) {
    uint8_t tx_dummy = 0xFFU;
    uint8_t rx_data;

    /* ��?0xFF 作为时钟�，读�芯片返回的数�*/
    HAL_SPI_TransmitReceive(&hspi2, &tx_dummy, &rx_data, 1, HAL_MAX_DELAY);
    return rx_data;
}

/*
 * 函数功能：检�CH395 芯片是�存在且通信正常
 * 返回值：CH395F_STATUS_OK - 检测到芯片，CH395F_STATUS_NOT_DETECTED - 未检测到
 * �定�件：SPI2 已正确�始化
 * 函数说明：��CMD_CHECK_EXIST (0x06) �测试字�0x57� *          芯片应返回按����?0xA8
 */
ch395f_status_t ch395f_check_exist(void) {
    uint8_t test_data = CH395F_CHECK_EXIST_TEST_DATA;
    uint8_t reply_data;

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��检测命�*/
    ch395f_write_cmd(CH395F_CMD_CHECK_EXIST);

    /* ��测试数�*/
    ch395f_write_data(test_data);

    /* 读�芯片回� */
    reply_data = ch395f_read_data();

    /* 结� SPI 事务 */
    ch395f_spi_end();

    /* 验�回�是�为测试数�的按��� */
    if (reply_data == (uint8_t)(~test_data)) {
        return CH395F_STATUS_OK;
    }

    return CH395F_STATUS_NOT_DETECTED;
}

/*
 * 函数功能：读�CH395 芯片版本� * 返回值：版本字节（bit5:0 为版本�）uint8_t
 * �定�件：芯片已通过 ch395f_check_exist() 检� */
uint8_t ch395f_get_version(void) {
    uint8_t version;

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��版本读�命�*/
    ch395f_write_cmd(CH395F_CMD_GET_IC_VER);

    /* 读�版本�*/
    version = ch395f_read_data();

    /* 结� SPI 事务 */
    ch395f_spi_end();

    return version;
}

/*
 * 函数功能：获�远�IP 和端� * 入��数：sock - Socket 索引  uint8_t  0 - 7
 *          p_buf - 6 字节输出缓冲区（4字节IP + 2字节端�� * �定�件：TCP Server 模�下连接建立�调用
 * 函数说明：IP 低字节在�，端�低字节在� */
void ch395f_get_remot_ipp(uint8_t sock, uint8_t *p_buf) {
    uint8_t i;

    /* 检查输入�数�法�?*/
    if (p_buf == NULL) {
        return;
    }

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��获�远�IP 和端�命�*/
    ch395f_write_cmd(CH395F_CMD_GET_REMOT_IPP_SN);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* 读� 4 字节 IP 地� */
    for (i = 0; i < 4; i++) {
        p_buf[i] = ch395f_read_data();
    }

    /* 读� 2 字节端��*/
    for (i = 4; i < 6; i++) {
        p_buf[i] = ch395f_read_data();
    }

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�CH395 功能�数
 * 入��数：para - 4 字节功能�数  uint32_t
 * �定�件：必须在 ch395f_init() 之�调用
 */
void ch395f_set_fun_para(uint32_t para) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置功能�数命�*/
    ch395f_write_cmd(CH395F_CMD_SET_FUN_PARA);

    /* ��?4 字节�数（低字节在��*/
    ch395f_write_data((uint8_t)(para));
    ch395f_write_data((uint8_t)(para >> 8));
    ch395f_write_data((uint8_t)(para >> 16));
    ch395f_write_data((uint8_t)(para >> 24));

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�TCP MSS
 * 入��数：mss - MSS � uint16_t  60~1460
 * �定�件：必须在 ch395f_init() 之�调用
 */
void ch395f_set_tcp_mss(uint16_t mss) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设�TCP MSS 命令 */
    ch395f_write_cmd(CH395F_CMD_SET_TCP_MSS);

    /* ��?2 字节 MSS 值（低字节在�） */
    ch395f_write_data(mss & 0xFFU);
    ch395f_write_data((mss >> 8) & 0xFFU);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�Socket 接收缓冲� * 入��数：sock - Socket 索引  uint8_t  0 - 7
 *          start_block - 起始�地�  uint8_t
 *          block_count - �个� uint8_t
 * �定�件：必须在 OPEN_SOCKET_SN 之�调用
 */
void ch395f_set_recv_buf(uint8_t sock, uint8_t start_block, uint8_t block_count) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置接收缓冲区命令 */
    ch395f_write_cmd(CH395F_CMD_SET_RECV_BUF);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* ��起始�地� */
    ch395f_write_data(start_block);

    /* ���个数 */
    ch395f_write_data(block_count);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�Socket ��缓冲区
 * 入��数：sock - Socket 索引  uint8_t  0 - 7
 *          start_block - 起始�地�  uint8_t
 *          block_count - �个� uint8_t
 * �定�件：必须在 OPEN_SOCKET_SN 之�调用
 */
void ch395f_set_send_buf(uint8_t sock, uint8_t start_block, uint8_t block_count) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置��缓冲区命令 */
    ch395f_write_cmd(CH395F_CMD_SET_SEND_BUF);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* ��起始�地� */
    ch395f_write_data(start_block);

    /* ���个数 */
    ch395f_write_data(block_count);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：清�Socket 接收缓冲� * 入��数：sock - Socket 索引  uint8_t  0 - 7
 * �定�件：Socket 已打开
 */
void ch395f_clear_recv_buf(uint8_t sock) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��清空接收缓冲区命令 */
    ch395f_write_cmd(CH395F_CMD_CLEAR_RECV_BUF_SN);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�TCP KeepAlive 空闲时间
 * 入��数：time - 空闲时间（秒� uint32_t
 * �定�件：必须在 ch395f_init() 之�调用
 */
void ch395f_set_keepalive_idle(uint32_t time) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设�KeepAlive 空闲时间命令 */
    ch395f_write_cmd(CH395F_CMD_SET_KEEPALIVE_IDLE);

    /* ��?4 字节时间值（低字节在�） */
    ch395f_write_data((uint8_t)(time));
    ch395f_write_data((uint8_t)(time >> 8));
    ch395f_write_data((uint8_t)(time >> 16));
    ch395f_write_data((uint8_t)(time >> 24));

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�TCP KeepAlive 探测间隔
 * 入��数：time - 间隔时间（秒� uint32_t
 * �定�件：必须在 ch395f_init() 之�调用
 */
void ch395f_set_keepalive_intvl(uint32_t time) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设�KeepAlive 探测间隔命令 */
    ch395f_write_cmd(CH395F_CMD_SET_KEEPALIVE_INTVL);

    /* ��?4 字节时间值（低字节在�） */
    ch395f_write_data((uint8_t)(time));
    ch395f_write_data((uint8_t)(time >> 8));
    ch395f_write_data((uint8_t)(time >> 16));
    ch395f_write_data((uint8_t)(time >> 24));

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�TCP KeepAlive 探测次数
 * 入��数：cnt - 探测次数  uint8_t
 * �定�件：必须在 ch395f_init() 之�调用
 */
void ch395f_set_keepalive_cnt(uint8_t cnt) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设�KeepAlive 探测次数命令 */
    ch395f_write_cmd(CH395F_CMD_SET_KEEPALIVE_CNT);

    /* ��探测次�*/
    ch395f_write_data(cnt);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：���用指定 Socket �KeepAlive
 * 入��数：sock - Socket 索引  uint8_t  0 - 7
 *          enable - 1 �用� �用  uint8_t
 * �定�件：Socket 已打开
 */
void ch395f_set_keepalive_enable(uint8_t sock, uint8_t enable) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设�KeepAlive 使能命令 */
    ch395f_write_cmd(CH395F_CMD_SET_KEEPALIVE_SN);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* ��使能标�*/
    ch395f_write_data(enable);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�TCP �传次数
 * 入��数：cnt - �传次数  uint8_t�=使用默认�� * �定�件：必须在 ch395f_init() 之�调用
 */
void ch395f_set_retrans_count(uint8_t cnt) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置�传次数命�*/
    ch395f_write_cmd(CH395F_CMD_SET_RETRAN_COUNT);

    /* ���传次�*/
    ch395f_write_data(cnt);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�TCP �传周期
 * 入��数：period - �传周期（毫秒）  uint16_t
 * �定�件：必须在 ch395f_init() 之�调用
 */
void ch395f_set_retrans_period(uint16_t period) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置�传周期命�*/
    ch395f_write_cmd(CH395F_CMD_SET_RETRAN_PERIOD);

    /* ��?2 字节周期值（低字节在�） */
    ch395f_write_data(period & 0xFFU);
    ch395f_write_data((period >> 8) & 0xFFU);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：软件��CH395
 * 返回值：CH395F_STATUS_OK
 * �定�件：SPI2 已正确�始化
 * 函数说明：��耗时�15ms（TE0），函数内部已包�延� */
ch395f_status_t ch395f_reset(void) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ����命�*/
    ch395f_write_cmd(CH395F_CMD_RESET_ALL);

    /* 结� SPI 事务 */
    ch395f_spi_end();

    /* 等待��完�（TE0 = 15ms 典型值，等待 20ms�*/
    HAL_Delay(CH395F_RESET_DELAY_MS);

    return CH395F_STATUS_OK;
}

/*
 * 函数功能：查询命令执行状� * 返回值：状�字节（CH395F_ERR_SUCCESS / CH395F_ERR_BUSY / ...）uint8_t
 * �定�件：仅在长执行命令（如�始化）�调� */
uint8_t ch395f_get_cmd_status(void) {
    uint8_t status;

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��状�查询命�*/
    ch395f_write_cmd(CH395F_CMD_GET_CMD_STATUS);

    /* 读�状�字�*/
    status = ch395f_read_data();

    /* 结� SPI 事务 */
    ch395f_spi_end();

    return status;
}

/*
 * 函数功能：轮询等待命令执行完� * 入��数：timeout_ms - 超时时间（毫秒）  uint32_t
 * 返回值：命令执行状��（CH395F_ERR_SUCCESS �CH395F_CMD_RET_ABORT� * �定�件：在��长执行命令�调� * 函数说明：� 20ms 查询一次，直到命令完�或超� */
uint8_t ch395f_poll_cmd_status(uint32_t timeout_ms) {
    uint8_t status;
    uint32_t retry_count = 0U;
    uint32_t max_retries = (timeout_ms + 20U - 1U) / 20U;

    while (1) {
        HAL_Delay(20U);
        status = ch395f_get_cmd_status();

        if (status != CH395F_ERR_BUSY) {
            return status;
        }

        if (++retry_count >= max_retries) {
            return CH395F_ERR_BUSY;  /* 超时 */
        }
    }
}

/*
 * 函数功能：�始化 CH395（包�MAC�PHY�TCP/IP �议栈）
 * 返回值：CH395F_STATUS_OK - �功，CH395F_STATUS_TIMEOUT - 超时失败
 * �定�件：芯片已通过 ch395f_reset() ��
 * 函数说明：阻塞等待�始化完�或超时（芯片需�约 200ms，这里等最�4s� */
ch395f_status_t ch395f_init(void) {
    uint8_t status;

    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_INIT_CH395);
    ch395f_spi_end();

    status = ch395f_poll_cmd_status(4000U);

    if (status == CH395F_ERR_SUCCESS) {
        return CH395F_STATUS_OK;
    }

    return (status == CH395F_ERR_BUSY) ? CH395F_STATUS_TIMEOUT : CH395F_STATUS_ERROR;
}

/*
 * 函数功能：设�CH395 IP 地�（低字节在�� * 入��数：p_ip - 4 字节 IP 地�指针  uint8_t*
 * �定�件：指针�空，芯片已�始化
 */
void ch395f_set_ip_addr(uint8_t *p_ip) {
    uint8_t i;

    /* 检查输入�数�法�?*/
    if (p_ip == NULL) {
        return;
    }

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设�IP 命令 */
    ch395f_write_cmd(CH395F_CMD_SET_IP_ADDR);

    /* �字节��IP 地� */
    for (i = 0; i < 4; i++) {
        ch395f_write_data(p_ip[i]);
    }

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设置网�IP 地�（低字节在�� * 入��数：p_gwip - 4 字节网关 IP 指针  uint8_t*
 * �定�件：指针�空，芯片已�始化
 */
void ch395f_set_gwip_addr(uint8_t *p_gwip) {
    uint8_t i;

    /* 检查输入�数�法�?*/
    if (p_gwip == NULL) {
        return;
    }

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置网关命�*/
    ch395f_write_cmd(CH395F_CMD_SET_GWIP_ADDR);

    /* �字节��网�IP */
    for (i = 0; i < 4; i++) {
        ch395f_write_data(p_gwip[i]);
    }

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设置�网掩�（低字节在�）
 * 入��数：p_mask - 4 字节�网掩�指针  uint8_t*
 * �定�件：指针�空，芯片已�始化
 */
void ch395f_set_mask_addr(uint8_t *p_mask) {
    uint8_t i;

    /* 检查输入�数�法�?*/
    if (p_mask == NULL) {
        return;
    }

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置掩�命�*/
    ch395f_write_cmd(CH395F_CMD_SET_MASK_ADDR);

    /* �字节���网掩�*/
    for (i = 0; i < 4; i++) {
        ch395f_write_data(p_mask[i]);
    }

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�MAC 地�（低字节在�，存储于 EEPROM� * 入��数：p_mac - 6 字节 MAC 地�指针  uint8_t*
 * �定�件：指针�空，芯片已�始化
 * 函数说明：执行耗时�30us（TE5� */
void ch395f_set_mac_addr(uint8_t *p_mac) {
    uint8_t i;

    /* 检查输入�数�法�?*/
    if (p_mac == NULL) {
        return;
    }

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设�MAC 命令 */
    ch395f_write_cmd(CH395F_CMD_SET_MAC_ADDR);

    /* �字节��MAC 地� */
    for (i = 0; i < 6; i++) {
        ch395f_write_data(p_mac[i]);
    }

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：从 CH395 读� MAC 地�
 * 出��数：p_mac - 6 字节 MAC 地�缓冲区指� uint8_t*
 * �定�件：指针�� */
void ch395f_get_mac_addr(uint8_t *p_mac) {
    uint8_t i;

    /* 检查输入�数�法�?*/
    if (p_mac == NULL) {
        return;
    }

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��读�MAC 命令 */
    ch395f_write_cmd(CH395F_CMD_GET_MAC_ADDR);

    /* �字节读�MAC 地� */
    for (i = 0; i < 6; i++) {
        p_mac[i] = ch395f_read_data();
    }

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：读�IP 信�（IP + 掩� + DNS，共 20 字节� * 出��数：p_buf - 20 字节缓冲区指� uint8_t*
 * �定�件：指针�� */
void ch395f_get_ip_inf(uint8_t *p_buf) {
    uint8_t i;

    /* 检查输入�数�法�?*/
    if (p_buf == NULL) {
        return;
    }

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��读�IP 信�命令 */
    ch395f_write_cmd(CH395F_CMD_GET_IP_INF);

    /* �字节读�IP 信�（共 20 字节�*/
    for (i = 0; i < 20; i++) {
        p_buf[i] = ch395f_read_data();
    }

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：获�PHY 连接状�? * 返回值：PHY 状��（CH395F_PHY_DISCONN�CH395F_PHY_10M_FULL 等）uint8_t
 * �定�件：芯片已�始� */
uint8_t ch395f_get_phy_status(void) {
    uint8_t status;

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��读�PHY 状�命�*/
    ch395f_write_cmd(CH395F_CMD_GET_PHY_STATUS);

    /* 读� PHY 状�?*/
    status = ch395f_read_data();

    /* 结� SPI 事务 */
    ch395f_spi_end();

    return status;
}

/*
 * 函数功能：设�PHY 连接模�
 * 入��数：phystat - 连接模�� uint8_t  0x20 = 自动�商
 * �定�件：芯片已�始� */
void ch395f_set_phy(uint8_t phystat) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设�PHY 命令 */
    ch395f_write_cmd(CH395F_CMD_SET_PHY);

    /* ��连接模���*/
    ch395f_write_data(phystat);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：使�关闭 CH395 �应 PING
 * 入��数：enable - 1 使能 PING �应� 关闭
 * �定�件：芯片已�始� * 函数说明：手�5.37 CMD_PING_ENABLE，默认关� */
void ch395f_ping_enable(uint8_t enable) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��?PING 使能命令 */
    ch395f_write_cmd(CH395F_CMD_PING_ENABLE);

    /* ��使能标�*/
    ch395f_write_data(enable);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：���用 DHCP
 * 入��数：enable - 1 �用� �用  uint8_t
 * �定�件：芯片已�始� */
void ch395f_set_dhcp(uint8_t enable) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��?DHCP 使能命令 */
    ch395f_write_cmd(CH395F_CMD_DHCP_ENABLE);

    /* �����用�数 */
    ch395f_write_data(enable);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：获�DHCP 状�? * 返回值：0 = �功，��= 错误/超时  uint8_t
 * �定�件：芯片已�始化且 DHCP 已�� */
uint8_t ch395f_get_dhcp_status(void) {
    uint8_t status;

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��读�DHCP 状�命�*/
    ch395f_write_cmd(CH395F_CMD_GET_DHCP_STATUS);

    /* 读� DHCP 状�?*/
    status = ch395f_read_data();

    /* 结� SPI 事务 */
    ch395f_spi_end();

    return status;
}

/*
 * 函数功能：设�Socket �议类型
 * 入��数：sock - Socket 索引  uint8_t  0 - 3
 *          proto - �议类型  uint8_t  CH395F_PROTO_TYPE_xxx
 * �定�件：Socket 未打开
 */
void ch395f_set_proto_type(uint8_t sock, uint8_t proto) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置�议类型命�*/
    ch395f_write_cmd(CH395F_CMD_SET_PROTO_TYPE_SN);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* ���议类�*/
    ch395f_write_data(proto);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�Socket 目标 IP 地�
 * 入��数：sock - Socket 索引  uint8_t  0 - 3
 *          p_ip - 4 字节目标 IP 指针  uint8_t*
 * �定�件：指针�� */
void ch395f_set_des_ip(uint8_t sock, uint8_t *p_ip) {
    uint8_t i;

    /* 检查输入�数�法�?*/
    if (p_ip == NULL) {
        return;
    }

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置目�IP 命令 */
    ch395f_write_cmd(CH395F_CMD_SET_IP_ADDR_SN);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* �字节��目�IP */
    for (i = 0; i < 4; i++) {
        ch395f_write_data(p_ip[i]);
    }

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�Socket 目标端�（�端�� * 入��数：sock - Socket 索引  uint8_t  0 - 3
 *          port - 目标端�  uint16_t
 * �定�件：无
 */
void ch395f_set_des_port(uint8_t sock, uint16_t port) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置目标端�命�*/
    ch395f_write_cmd(CH395F_CMD_SET_DES_PORT_SN);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* ��端�低字节 */
    ch395f_write_data(port & 0xFFU);

    /* ��端�高字节 */
    ch395f_write_data((port >> 8) & 0xFFU);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：设�Socket �端�（�端�）
 * 入��数：sock - Socket 索引  uint8_t  0 - 3
 *          port - �端� uint16_t
 * �定�件：无
 */
void ch395f_set_sour_port(uint8_t sock, uint16_t port) {
    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��设置�端�命令 */
    ch395f_write_cmd(CH395F_CMD_SET_SOUR_PORT_SN);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* ��端�低字节 */
    ch395f_write_data(port & 0xFFU);

    /* ��端�高字节 */
    ch395f_write_data((port >> 8) & 0xFFU);

    /* 结� SPI 事务 */
    ch395f_spi_end();
}

/*
 * 函数功能：打开 Socket
 * 入��数：sock - Socket 索引  uint8_t  0 - 7
 * 返回值：命令执行状��（CH395F_ERR_SUCCESS 表示�功� uint8_t
 * �定�件：�议类型�目�IP�端�已设置
 */
uint8_t ch395f_open_socket(uint8_t sock) {
    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_OPEN_SOCKET_SN);
    ch395f_write_data(sock);
    ch395f_spi_end();

    return ch395f_poll_cmd_status(4000U);
}

/*
 * 函数功能：关�Socket
 * 入��数：sock - Socket 索引  uint8_t  0 - 7
 * 返回值：命令执行状��（CH395F_ERR_SUCCESS 表示�功� uint8_t
 * �定�件：Socket 已打开
 */
uint8_t ch395f_close_socket(uint8_t sock) {
    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_CLOSE_SOCKET_SN);
    ch395f_write_data(sock);
    ch395f_spi_end();

    return ch395f_poll_cmd_status(4000U);
}

/*
 * 函数功能：��TCP 监�模�
 * 入��数：sock - Socket 索引  uint8_t  0 - 7
 * 返回值：命令执行状��（CH395F_ERR_SUCCESS 表示�功� uint8_t
 * �定�件：Socket 已打开且�议类型为 TCP
 */
uint8_t ch395f_tcp_listen(uint8_t sock) {
    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_TCP_LISTEN_SN);
    ch395f_write_data(sock);
    ch395f_spi_end();

    return ch395f_poll_cmd_status(4000U);
}

/*
 * 函数功能：��TCP 连接
 * 入��数：sock - Socket 索引  uint8_t  0 - 7
 * 返回值：命令执行状��（CH395F_ERR_SUCCESS 表示�功� uint8_t
 * �定�件：Socket 已打开且�议类型为 TCP
 */
uint8_t ch395f_tcp_connect(uint8_t sock) {
    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_TCP_CONNECT_SN);
    ch395f_write_data(sock);
    ch395f_spi_end();

    return ch395f_poll_cmd_status(4000U);
}

/*
 * 函数功能：断开 TCP 连接
 * 入��数：sock - Socket 索引  uint8_t  0 - 7
 * 返回值：命令执行状��（CH395F_ERR_SUCCESS 表示�功� uint8_t
 * �定�件：TCP 已建立连� */
uint8_t ch395f_tcp_disconnect(uint8_t sock) {
    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_TCP_DISCONNECT_SN);
    ch395f_write_data(sock);
    ch395f_spi_end();

    return ch395f_poll_cmd_status(4000U);
}

/*
 * 函数功能：� Socket ��缓冲区写入数�（DMA 批�传输� * 入��数：sock - Socket 索引  uint8_t  0 - 3
 *          p_data - 数�指针  uint8_t*
 *          len - 数�长度  uint16_t
 * �定�件：指针�空，长度大于 0，TCP 已连接或 UDP 已打开
 * 函数说明：将命令头和数�打包�DMA 缓冲区，一�SPI DMA 传输完�
 */
void ch395f_write_send_buf(uint8_t sock, uint8_t *p_data, uint16_t len) {
    uint16_t total;

    /* 检查输入�数�法�?*/
    if (p_data == NULL) {
        return;
    }

    /* 计算总长度：1(cmd) + 1(sock) + 2(len) + data */
    total = 4U + len;
    if (total > CH395F_DMA_BUF_SIZE) {
        return;
    }

    /* 打包命令头到 DMA ��缓冲区 */
    s_spi2_dma_tx_buf[0] = CH395F_CMD_WRITE_SEND_BUF_SN;
    s_spi2_dma_tx_buf[1] = sock;
    s_spi2_dma_tx_buf[2] = len & 0xFFU;
    s_spi2_dma_tx_buf[3] = (len >> 8) & 0xFFU;

    /* 拷�用户数��DMA ��缓冲区 */
    memcpy(&s_spi2_dma_tx_buf[4], p_data, len);

    /* 数��步�障：确�memcpy 写入�DMA 读��对总线�� */
    __DSB();

    /* CS 拉低 -> DMA 批�传输 -> CS 拉高 */
    ch395f_spi_begin();
    ch395f_spi_dma_transfer(total);
    ch395f_spi_end();
}

/*
 * 函数功能：从 Socket 接收缓冲区读�数�（DMA 批�传输� * 入��数：sock - Socket 索引  uint8_t  0 - 3
 *          p_data - 输出缓冲区指� uint8_t*
 *          len - 待读�数�长� uint16_t
 * �定�件：指针�空，长度大于 0，接收缓冲区有数� * 函数说明：命令头打包到��缓冲区（数�部分填 0xFF 作时钟）� *          一�SPI DMA 全�工传输，有效数�从接收缓冲区�移 4 字节处拷� */
void ch395f_read_recv_buf(uint8_t sock, uint8_t *p_data, uint16_t len) {
    uint16_t total;

    /* 检查输入�数�法�?*/
    if (p_data == NULL) {
        return;
    }

    /* 计算总长度：1(cmd) + 1(sock) + 2(len) + data */
    total = 4U + len;
    if (total > CH395F_DMA_BUF_SIZE) {
        return;
    }

    /* 命令头打包到 DMA ��缓冲区 */
    s_spi2_dma_tx_buf[0] = CH395F_CMD_READ_RECV_BUF_SN;
    s_spi2_dma_tx_buf[1] = sock;
    s_spi2_dma_tx_buf[2] = len & 0xFFU;
    s_spi2_dma_tx_buf[3] = (len >> 8) & 0xFFU;

    /* 数�部分填充 0xFF（SPI 时钟驱动用） */
    memset(&s_spi2_dma_tx_buf[4], 0xFFU, len);

    /* CS 拉低 -> DMA 全�工传输（�命令头 + 收数�） -> CS 拉高 */
    ch395f_spi_begin();
    ch395f_spi_dma_transfer(total);
    ch395f_spi_end();

    /* �DMA 接收缓冲区��4 字节处拷�有效数�到用户缓冲�*/
    memcpy(p_data, &s_spi2_dma_rx_buf[4], len);
}

/*
 * 函数功能：获�Socket 接收缓冲区数�长� * 入��数：sock - Socket 索引  uint8_t  0 - 3
 * 返回值：接收数�长度  uint16_t
 * �定�件：Socket 已打开
 */
uint16_t ch395f_get_recv_len(uint8_t sock) {
    uint16_t recv_len;

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��获�接收长度命�*/
    ch395f_write_cmd(CH395F_CMD_GET_RECV_LEN_SN);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* 读�长度低字�*/
    recv_len = ch395f_read_data();

    /* 读�长度高字节并组� */
    recv_len |= (uint16_t)ch395f_read_data() << 8;

    /* 结� SPI 事务 */
    ch395f_spi_end();

    return recv_len;
}

/*
 * 函数功能：获�全局中断状�? * 返回值：中断状�字� uint8_t
 * �定�件：芯片已�始� */
uint8_t ch395f_get_glob_int_status(void) {
    uint8_t status;

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��读�全局中断状�命�*/
    ch395f_write_cmd(CH395F_CMD_GET_GLOB_INT_STATUS);

    /* 读�中断状�?*/
    status = ch395f_read_data();

    /* 结� SPI 事务 */
    ch395f_spi_end();

    return status;
}

/*
 * 函数功能：获�全局中断状�（2 字节版，支� Socket 0~7� * 返回值：中断状�?uint16_t（低字节=Socket 0~3 + PHY/DHCP，高字节=Socket 4~7 + DHCPv6� * �定�件：芯片已�始� */
uint16_t ch395f_get_glob_int_status_all(void) {
    uint16_t status;

    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_GET_GLOB_INT_STATUS_ALL);
    status = (uint16_t)ch395f_read_data();
    status |= ((uint16_t)ch395f_read_data() << 8U);
    ch395f_spi_end();

    return status;
}

/*
 * 函数功能：获�Socket 中断状�? * 入��数：sock - Socket 索引  uint8_t  0 - 7
 * 返回值：Socket 中断状�字� uint8_t
 * �定�件：芯片已�始� */
uint8_t ch395f_get_sock_int_status(uint8_t sock) {
    uint8_t status;

    /* 开�SPI 事务 */
    ch395f_spi_begin();

    /* ��读�Socket 中断状�命�*/
    ch395f_write_cmd(CH395F_CMD_GET_INT_STATUS_SN);

    /* ��?Socket 索引 */
    ch395f_write_data(sock);

    /* 读�中断状�?*/
    status = ch395f_read_data();

    /* 结� SPI 事务 */
    ch395f_spi_end();

    return status;
}

/*
 * 函数功能：获�Socket 状�（2 字节输出� * 入��数：sock - Socket 索引  uint8_t  0 - 7
 *          status - 2 字节输出缓冲�[0]=Socket状�? [1]=TCP状�? * �定�件：芯片已�始� */
void ch395f_get_socket_status(uint8_t sock, uint8_t *p_status) {
    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_GET_SOCKET_STATUS_SN);
    ch395f_write_data(sock);
    p_status[0] = ch395f_read_data();
    p_status[1] = ch395f_read_data();
    ch395f_spi_end();
}

/*
 * 函数功能：设�ARP �传�数
 * 入��数：period_100ms - ARP �传周期（��100ms�=默认�10�秒）  uint8_t
 *          cnt - ARP �传次数�=默认�3� uint8_t
 * �定�件：应�ch395f_init() 之�调用
 * 函数说明：周期最大值约 25.5 秒，255 表示无��传
 */
void ch395f_set_arp(uint8_t period_100ms, uint8_t cnt) {
    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_SET_ARP);
    ch395f_write_data(period_100ms);
    ch395f_write_data(cnt);
    ch395f_spi_end();
}

/*
 * 函数功能：设�Socket TTL
 * 入��数：sock - Socket 索引  uint8_t  0 - 7
 *          ttl - TTL � uint8_t  最�128
 * �定�件：Socket 已打开，TCP Server 模�下�生效
 */
void ch395f_set_ttl(uint8_t sock, uint8_t ttl) {
    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_SET_TTL);
    ch395f_write_data(sock);
    ch395f_write_data(ttl);
    ch395f_spi_end();
}

/*
 * 函数功能：获���达信�（用于调试连接失败原因）
 * 出��数：p_buf - 8 字节输出缓冲区（类型+�议�端�+IP� * �定�件：收�GINT_STAT_UNREACH 中断�调� */
void ch395f_get_unreach_info(uint8_t *p_buf) {
    uint8_t i = 0;

    ch395f_spi_begin();
    ch395f_write_cmd(CH395F_CMD_GET_UNREACH_IPPT);
    for (i = 0; i < 8; i++) {
        p_buf[i] = ch395f_read_data();
    }
    ch395f_spi_end();
}