stm32f103+rawudp实验代码

以下是一个基于STM32F103和RAW UDP协议的实验代码示例：

#include "stm32f10x.h"
#include "stm32f10x_conf.h"
#include <string.h>

#define DEST_IP_ADDR0   ((uint8_t)192)
#define DEST_IP_ADDR1   ((uint8_t)168)
#define DEST_IP_ADDR2   ((uint8_t)1)
#define DEST_IP_ADDR3   ((uint8_t)10)
#define DEST_PORT       ((uint16_t)5000)
#define LOCAL_PORT      ((uint16_t)4000)

#define BUFFER_SIZE     ((uint16_t)32)

uint8_t buffer[BUFFER_SIZE];

void RCC_Configuration(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
}

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_13;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void USART_Configuration(void)
{
    USART_InitTypeDef USART_InitStructure;

    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Tx;
    USART_Init(USART2, &USART_InitStructure);
    USART_Cmd(USART2, ENABLE);
}

void TIM_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

    TIM_TimeBaseStructure.TIM_Period = 65535;
    TIM_TimeBaseStructure.TIM_Prescaler = 7199;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    TIM_TimeBaseStructure.TIM_Period = 65535;
    TIM_TimeBaseStructure.TIM_Prescaler = 7199;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
}

void SPI_Configuration(void)
{
    SPI_InitTypeDef SPI_InitStructure;

    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);
    SPI_Cmd(SPI1, ENABLE);
}

void ETH_GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14 | GPIO_Pin_15;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    GPIO_PinRemapConfig(GPIO_Remap_ETH, ENABLE);
}

void ETH_MACDMA_Configuration(void)
{
    ETH_InitTypeDef ETH_InitStructure;

    ETH_StructInit(&ETH_InitStructure);
    ETH_InitStructure.ETH_AutoNegotiation = ETH_AutoNegotiation_Enable;
    ETH_InitStructure.ETH_Speed = ETH_Speed_100M;
    ETH_InitStructure.ETH_Mode = ETH_Mode_FullDuplex;
    ETH_InitStructure.ETH_RXMode = ETH_RXMode_Interrupt;
    ETH_InitStructure.ETH_ChecksumOffload = ETH_ChecksumOffload_Enable;
    ETH_InitStructure.ETH_PowerDown = ETH_PowerDown_Disable;
    ETH_Init(&ETH_InitStructure, ETH_PHY_AutoNegotiation);

    ETH_DMAITConfig(ETH_DMA_IT_NIS | ETH_DMA_IT_R, ENABLE);
    ETH_DMACmd(ETH_DMA_Channel_Rx, ENABLE);
}

void ETH_NVIC_Configuration(void)
{
    NVIC_InitTypeDef NVIC_InitStructure;

    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

    NVIC_InitStructure.NVIC_IRQChannel = ETH_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}

void ETH_Configuration(void)
{
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ETH_MAC | RCC_AHBPeriph_ETH_MAC_Tx | RCC_AHBPeriph_ETH_MAC_Rx, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

    ETH_GPIO_Configuration();

    ETH_MACDMA_Configuration();

    ETH_NVIC_Configuration();
}

void UDP_Configuration(void)
{
    uint32_t ip_addr;

    ip_addr = (DEST_IP_ADDR0 << 24) | (DEST_IP_ADDR1 << 16) | (DEST_IP_ADDR2 << 8) | DEST_IP_ADDR3;
    ETH_UDP_Configuration(ip_addr, DEST_PORT, LOCAL_PORT);
}

int main(void)
{
    RCC_Configuration();

    GPIO_Configuration();

    USART_Configuration();

    TIM_Configuration();

    SPI_Configuration();

    ETH_Configuration();

    UDP_Configuration();

    while(1)
    {
        // 接收数据
        if(ETH_UDP_Receive(buffer, BUFFER_SIZE) == 1)
        {
            // 处理接收到的数据
            if(strncmp((char*)buffer, "Hello", 5) == 0)
            {
                // 发送回复
                strncpy((char*)buffer, "World", 5);
                ETH_UDP_Send(buffer, strlen((char*)buffer));
            }
        }
    }
}

以上代码实现了使用STM32F103芯片，通过RAW UDP协议与另一个设备进行通信的功能。其中，需要注意的几个点：

- `DEST_IP_ADDR0` ~ `DEST_IP_ADDR3` 定义了目标设备的IP地址，`DEST_PORT` 定义了目标端口号，`LOCAL_PORT` 定义了本地端口号；
- `ETH_UDP_Configuration` 函数用于配置UDP协议，此函数需要在ETH库中实现；
- `ETH_UDP_Receive` 函数用于接收UDP数据包，此函数需要在ETH库中实现；
- `ETH_UDP_Send` 函数用于发送UDP数据包，此函数需要在ETH库中实现。

以上是一个简单的实验代码示例，具体实现需根据实际需求进行调整。