Network

Lwip+enc28j60无法ping通

发布于 2015-02-05 11:38:30 浏览：6153 订阅该版

9 个回答

aozima 2015-02-05

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

bpengj65359 2015-02-05

这家伙很懒，什么也没写！

aozima 2015-02-05

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

bpengj65359 2015-02-05

这家伙很懒，什么也没写！

microtomato 2015-02-06

这家伙很懒，什么也没写！

流程应该是首先初始化所用到的GPIO，然后注册SPI总线，绑定SPI设备，接着调用驱动中的enc28j60_attach就可以了。
给一段我的代码，在我的板上是好用的。enc28j60的驱动是RT-Thread V2.0.0里自带的enc28j60.c，位置：RT_ThreadV2_0_0componentsdriversspi。

enc28j60与STM32F103VET6开发板的接口：
SPI2_MOSI(蓝色)=PB15
SPI2_MISO(紫色)=PB14
SPI2_SCK(绿色)=PB13
VCC(红色)=3.3v
GND(棕色)=0v
RST(橙色)=PC6
INT(灰色)=PA8
CS(黄色)=PB12

以下是初始化代码：

```

void spi2_init_thread(void *parmeter) {
    GPIO_InitTypeDef GPIO_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure; 
    static struct stm32_spi_bus spi2_bus;
    static struct rt_spi_device spi20_dev; 
    static struct stm32_spi_cs enc28j60_cs;

//开启GPIOB的时钟(SPI2和enc28j60的CS都在GPIOB上)
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO,  ENABLE); 
    //配置SPI2所占用的GPIO
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
    //配置SPI 以太网模块(enc28j60)的CS信号(PB12)
    enc28j60_cs.GPIOx = GPIOB; 
    enc28j60_cs.GPIO_Pin = GPIO_Pin_12; 
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Pin = enc28j60_cs.GPIO_Pin; 
    GPIO_Init(enc28j60_cs.GPIOx, &GPIO_InitStructure); 
    GPIO_SetBits(enc28j60_cs.GPIOx, enc28j60_cs.GPIO_Pin); 
    //配置以太网芯片(enc28j60)的中断信号(PA8)
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource8);
    EXTI_Enable(1,8);     
    //注册SPI2总线
    stm32_spi_register(SPI2, &spi2_bus, "spi2");
    //绑定设备
    rt_spi_bus_attach_device(&spi20_dev, "spi20", "spi2", (void *)&enc28j60_cs); 
    enc28j60_attach("spi20");
}

```

以下是中断代码：

```

void EXTI_Enable(rt_uint32_t enable, rt_uint8_t LineNo)
{
    EXTI_InitTypeDef EXTI_InitStructure;

/* Configure  EXTI  */
    switch(LineNo)
    {
        case 6:
            EXTI_InitStructure.EXTI_Line = EXTI_Line6;
            break;
        case 8:
            EXTI_InitStructure.EXTI_Line = EXTI_Line8;
            break;
        default:
            ;

}
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //Falling下降沿 Rising上升

if(enable)
    {
        /* enable */
        EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    } else
    {
        /* disable */
        EXTI_InitStructure.EXTI_LineCmd = DISABLE;
    }

EXTI_Init(&EXTI_InitStructure);
    switch(LineNo)
    {   case 6:
            EXTI_ClearITPendingBit(EXTI_Line6);
            break;
        case 8:
            EXTI_ClearITPendingBit(EXTI_Line8);
            break;
        default:
            ;
    }
}

void EXTI9_5_IRQHandler(void)
{
    //struct rtgui_touch_device *spi_touch = &touch_dev; 
    /* disable interrupt */
    if(EXTI_GetITStatus(EXTI_Line6) != RESET)
    {
        EXTI_Enable(0,6); 
    
        rt_sem_release(sem_touch_calc); 
    
        EXTI_ClearITPendingBit(EXTI_Line6);
    }

#ifdef  RT_USING_LWIP  //enc28j60中断使用PA8

if(EXTI_GetITStatus(EXTI_Line8) != RESET)
    {
        rt_interrupt_enter();
        EXTI_ClearITPendingBit(EXTI_Line8);
        enc28j60_isr();
        rt_interrupt_leave();

}
#endif /* RT_USING_LWIP */
}

```

你的问题可能是CS信号没处理好，导致同一个SPI总线上的设备发生冲突。如果enc28j60所挂的spi总线有多个设备，那么必须1个个轮流初始化，在初始化前把其他设备的CS拉高，以防冲突。