[其他ST产品] stm32根据芯片ID计算mac地址

/**

 * [url=home.php?mod=space&uid=247401]@brief[/url] 获取mac地址

 * 

 * @param pMacBuf 存储MAC地址buffer的首地址

 */

void getmac(uint8_t* pMacBuf)

{

    if(pMacBuf == NULL)

        return;



        uint32_t uiMcuId = 0;

        uint8_t pMcuID[15] = {0};

        int i = 0;

    uint32_t CpuID[3] = {0};

//获取CPU唯一ID

#if 0//STM32F1系列

        CpuID[0] =*(vu32*)(0x1ffff7e8); //按全字（32位）读取

        CpuID[1] =*(vu32*)(0x1ffff7ec);

        CpuID[2] =*(vu32*)(0x1ffff7f0);

#endif

        

#if 1//STM32F4系列

        CpuID[0]=*(uint32_t*)(0x1fff7a10);

        CpuID[1]=*(uint32_t*)(0x1fff7a14);

        CpuID[2]=*(uint32_t*)(0x1fff7a18);

#endif

    printf("MCU UID: %08X-%08X-%08X\r\n",CpuID[0],CpuID[1],CpuID[2]);

    printf("Flash Size: %dK\r\n", *(uint16_t *)(0X1FFF7a22));

        

        //按字节（8位）读取

        pMcuID[0] = (uint8_t)(CpuID[0] & 0x000000FF);

        pMcuID[1] = (uint8_t)((CpuID[0] & 0xFF00) >>8);

        pMcuID[2] = (uint8_t)((CpuID[0] & 0xFF0000) >>16);

        pMcuID[3] = (uint8_t)((CpuID[0] & 0xFF000000) >>24);

        

        pMcuID[4] = (uint8_t)(CpuID[1] & 0xFF);

        pMcuID[5] = (uint8_t)((CpuID[1] & 0xFF00) >>8);

        pMcuID[6] = (uint8_t)((CpuID[1] & 0xFF0000) >>16);

        pMcuID[7] = (uint8_t)((CpuID[1] & 0xFF000000) >>24);

        

        pMcuID[8] = (uint8_t)(CpuID[2] & 0xFF);

        pMcuID[9] = (uint8_t)((CpuID[2] & 0xFF00) >>8);

        pMcuID[10] = (uint8_t)((CpuID[2] & 0xFF0000) >>16);

        pMcuID[11] = (uint8_t)((CpuID[2] & 0xFF000000) >>24);



        uiMcuId = (CpuID[0]>>1)+(CpuID[1]>>2)+(CpuID[2]>>3);



        for(i=0; i<12; i++) //获取McuID[12]

        {

                pMcuID[12] += pMcuID[i];        

        }

        for(i=0; i<12; i++)        //获取McuID[13]

        {

                pMcuID[13] ^= pMcuID[i];        

        }



        pMacBuf[0] = (uint8_t)(uiMcuId & 0xF0);

        pMacBuf[1] = (uint8_t)((uiMcuId & 0xFF00) >>8);

        pMacBuf[2] = (uint8_t)((uiMcuId & 0xFF0000) >>16);

        pMacBuf[3] = (uint8_t)((uiMcuId & 0xFF000000) >>24);

        pMacBuf[4] = pMcuID[12];

        pMacBuf[5] = pMcuID[13];

    

    return;

}