C#和C实现通过CRC-16 (Modbus)获取CRC值并校验数据(代码)

以下是C#和C语言实现通过CRC-16 (Modbus)获取CRC值并校验数据的代码：

C#代码实现：

public static ushort CalculateCRC(byte[] data)
{
    ushort crc = 0xFFFF;

    for (int i = 0; i < data.Length; i++)
    {
        crc ^= data[i];

        for (int j = 0; j < 8; j++)
        {
            if ((crc & 0x0001) == 0x0001)
            {
                crc >>= 1;
                crc ^= 0xA001;
            }
            else
            {
                crc >>= 1;
            }
        }
    }

    return crc;
}

public static bool VerifyCRC(byte[] data, ushort crc)
{
    ushort calculatedCrc = CalculateCRC(data);
    return calculatedCrc == crc;
}

C语言代码实现：

#include <stdio.h>

unsigned short CalculateCRC(unsigned char *data, unsigned int length)
{
    unsigned short crc = 0xFFFF;

    for (unsigned int i = 0; i < length; i++)
    {
        crc ^= data[i];

        for (unsigned int j = 0; j < 8; j++)
        {
            if ((crc & 0x0001) == 0x0001)
            {
                crc >>= 1;
                crc ^= 0xA001;
            }
            else
            {
                crc >>= 1;
            }
        }
    }

    return crc;
}

bool VerifyCRC(unsigned char *data, unsigned int length, unsigned short crc)
{
    unsigned short calculatedCrc = CalculateCRC(data, length);
    return calculatedCrc == crc;
}

int main()
{
    unsigned char data[] = { 0x01, 0x03, 0x00, 0x00, 0x00, 0x02 };
    unsigned short crc = CalculateCRC(data, sizeof(data));
    printf("CRC: 0x%X\n", crc);

    unsigned char verifyData[] = { 0x01, 0x03, 0x00, 0x00, 0x00, 0x02, 0x05, 0x02 };
    unsigned short verifyCrc = 0x0205;
    bool result = VerifyCRC(verifyData, sizeof(verifyData), verifyCrc);
    printf("Verify Result: %d\n", result);

    return 0;
}

注意：以上代码仅为示例，具体实现需要根据实际情况进行调整。