帮我写一个mm32f5270驱动rc522外设的代码

当然可以帮您编写一个 MM32F5270 驱动 RC522 外设的代码。以下是一个简单的示例代码，用于初始化并与 RC522 进行通信。请注意，这只是一个基本框架，您可能需要根据您的具体需求进行修改和完善。

#include "mm32f5270.h"
#include "rc522.h"

// RC522 接口定义
#define RC522_SPI_PORT      SPI1
#define RC522_SPI_CLK       RCC_APB2Periph_SPI1
#define RC522_SPI_GPIO_PORT GPIOA
#define RC522_SPI_CS_PIN    GPIO_Pin_4
#define RC522_SPI_SCK_PIN   GPIO_Pin_5
#define RC522_SPI_MISO_PIN  GPIO_Pin_6
#define RC522_SPI_MOSI_PIN  GPIO_Pin_7

// RC522 初始化
void RC522_Init(void)
{
    SPI_InitTypeDef SPI_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    // 使能 SPI 时钟
    RCC_APB2PeriphClockCmd(RC522_SPI_CLK, ENABLE);

    // 配置 SPI 引脚
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_InitStructure.GPIO_Pin = RC522_SPI_SCK_PIN;
    GPIO_Init(RC522_SPI_GPIO_PORT, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = RC522_SPI_MISO_PIN;
    GPIO_Init(RC522_SPI_GPIO_PORT, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = RC522_SPI_MOSI_PIN;
    GPIO_Init(RC522_SPI_GPIO_PORT, &GPIO_InitStructure);

    // 配置 CS 引脚
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Pin = RC522_SPI_CS_PIN;
    GPIO_Init(RC522_SPI_GPIO_PORT, &GPIO_InitStructure);

    // 初始化 SPI
    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_256;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(RC522_SPI_PORT, &SPI_InitStructure);
    SPI_Cmd(RC522_SPI_PORT, ENABLE);
}

// RC522 发送数据
void RC522_SendByte(uint8_t data)
{
    while (SPI_I2S_GetFlagStatus(RC522_SPI_PORT, SPI_I2S_FLAG_TXE) == RESET);
    SPI_I2S_SendData(RC522_SPI_PORT, data);
    while (SPI_I2S_GetFlagStatus(RC522_SPI_PORT, SPI_I2S_FLAG_RXNE) == RESET);
    SPI_I2S_ReceiveData(RC522_SPI_PORT);
}

// RC522 接收数据
uint8_t RC522_ReceiveByte(void)
{
    while (SPI_I2S_GetFlagStatus(RC522_SPI_PORT, SPI_I2S_FLAG_TXE) == RESET);
    SPI_I2S_SendData(RC522_SPI_PORT, 0xFF);
    while (SPI_I2S_GetFlagStatus(RC522_SPI_PORT, SPI_I2S_FLAG_RXNE) == RESET);
    return SPI_I2S_ReceiveData(RC522_SPI_PORT);
}

// RC522 读取寄存器
uint8_t RC522_ReadReg(uint8_t addr)
{
    uint8_t value;
    GPIO_ResetBits(RC522_SPI_GPIO_PORT, RC522_SPI_CS_PIN);
    RC522_SendByte((addr << 1) | 0x80);
    value = RC522_ReceiveByte();
    GPIO_SetBits(RC522_SPI_GPIO_PORT, RC522_SPI_CS_PIN);
    return value;
}

// RC522 写入寄存器
void RC522_WriteReg(uint8_t addr, uint8_t value)
{
    GPIO_ResetBits(RC522_SPI_GPIO_PORT, RC522_SPI_CS_PIN);
    RC522_SendByte(addr << 1);
    RC522_SendByte(value);
    GPIO_SetBits(RC522_SPI_GPIO_PORT, RC522_SPI_CS_PIN);
}

请注意，此代码仅涵盖了基本的初始化和读写寄存器操作。具体的功能和应用逻辑需要根据您的需求进行补充和修改。同时，还需要根据您的硬件连接情况进行相应的配置。

希望对您有所帮助！如有任何问题，请随时提问。