stm32RC522串口读写

对于stm32RC522串口读写，需要使用RC522的SPI接口进行通信。具体步骤如下：

1. 初始化SPI接口，设置SPI的时钟、模式等参数。
2. 初始化RC522，包括寄存器的配置、天线的开启等。
3. 发送RC522命令，读取或写入数据。
4. 关闭SPI接口和RC522。

以下是一个简单的示例代码：

#include "stm32f10x.h"
#include "rc522.h"

void SPI_Configuration(void)
{
    SPI_InitTypeDef SPI_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7;
    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_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_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_Low;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE);
}

int main(void)
{
    uint8_t data[16];
    uint8_t uid[10];
    uint8_t status;

    SPI_Configuration();
    RC522_Init();

    while (1)
    {
        status = RC522_Request(PICC_REQIDL, data);
        if (status == MI_OK)
        {
            status = RC522_Anticoll(uid);
            if (status == MI_OK)
            {
                // UID读取成功
            }
        }
    }
}