M0系列的UID应用方法

/**************************************************************************//**

 * [url=home.php?mod=space&uid=288409]@file[/url]     main.c

 * @brief

 *           Execution IO toggle example with UID protect.

 * @note

 * Copyright (C) 2019 Nuvoton Technology Corp. All rights reserved.

 *****************************************************************************/

#include <stdio.h>

#include "M051Series.h"



#define PLL_CLOCK                   50000000

                                    

#define UID_START_ADDR              0x00002000   // UID start address of APROM

#define UID_ADDR_OFFSET             0x100        // UID address offset of APROM



__attribute__((at(UID_START_ADDR + UID_ADDR_OFFSET))) static const uint32_t gau32UIDAddr[4]= {2,2,2};



/*---------------------------------------------------------------------------

   Function:    SYS_Init

   Parameters:  None.

   Returns:     None.

   Description: System and periphial module clock setting.

---------------------------------------------------------------------------*/

void SYS_Init(void)

{



    /* Enable Internal RC 22.1184MHz clock */

    CLK_EnableXtalRC(CLK_PWRCON_OSC22M_EN_Msk);



    /* Waiting for Internal RC clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk);



    /* Switch HCLK clock source to Internal RC and HCLK source divide 1 */

    CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1));



    /* Enable external XTAL 12MHz clock */

    CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk);



    /* Waiting for external XTAL clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_XTL12M_STB_Msk);



    /* Set core clock as PLL_CLOCK from PLL */

    CLK_SetCoreClock(PLL_CLOCK);



    /* Enable UART module clock */

    CLK_EnableModuleClock(UART0_MODULE);



    /* Select UART module clock source */

    CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_HXT, CLK_CLKDIV_UART(1));



    /* Set GPB multi-function pins for UART0 RXD(P0.3) and TXD(P0.2) */

    SYS->P0_MFP &= ~(SYS_MFP_P03_Msk | SYS_MFP_P02_Msk);

    SYS->P0_MFP |= (SYS_MFP_P03_RXD0 | SYS_MFP_P02_TXD0);



}



/*---------------------------------------------------------------------------

   Function:    UART0_Init

   Parameters:  None.

   Returns:     None.

   Description: Initialize UART0 module, setting buadrate is 115200 bps

---------------------------------------------------------------------------*/

void UART0_Init()

{

    /* Reset UART0 module */

    SYS_ResetModule(UART0_RST);



    /* Configure UART0 and set UART0 Baudrate */

    UART_Open(UART0, 115200);

}



/*---------------------------------------------------------------------------

   Function:    Delay_count

   Parameters:  None.

   Returns:     None.

   Description: Delay of IO toggle.

---------------------------------------------------------------------------*/

void Delay_count(int32_t u32count)

{

    int32_t i32i,i32j;

    for(i32i=0; i32i<=3000; i32i++)

        for(i32j=0; i32j<u32count; i32j++);

}



/*---------------------------------------------------------------------------

   Function:    main

   Parameters:  None.

   Returns:     None.

   Description: main routine of the example.

---------------------------------------------------------------------------*/

int main(void)

{

    int32_t  i32_cnt;

    uint32_t au32mcuUID[4];

    uint32_t au32modfiyUID[4];



    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Init System, peripheral clock and multi-function I/O */

    SYS_Init();



    /* Enable FMC ISP function */

    FMC_Open();



    /* Lock protected registers */

    SYS_LockReg();



    /* Init UART0 for printf */

    UART0_Init();



    printf("\n\nCPU [url=home.php?mod=space&uid=72445]@[/url] %d Hz\n", SystemCoreClock);

    printf("Example : IO toggle with UID protect\n");



    /* Configure PB.13 as Output mode*/

    GPIO_SetMode(P3, BIT5, GPIO_PMD_OUTPUT);



    SYS_UnlockReg();



    for(i32_cnt = 0; i32_cnt < 3; i32_cnt++)

    {

        /* Read UID using FMC ISP form chip */

        au32mcuUID[i32_cnt] = FMC_ReadUID(i32_cnt);

        printf("  Unique ID %d ........................... [0x%08x]\n", i32_cnt, au32mcuUID[i32_cnt]);

    }



    for(i32_cnt = 0; i32_cnt < 3; i32_cnt++)

    {

        /* Read chnage UID form APROM */

        au32modfiyUID[i32_cnt] = FMC_Read(UID_START_ADDR+UID_ADDR_OFFSET+(i32_cnt*4));

        printf("  Modify ID %d ........................... [0x%08x]\n", i32_cnt, au32modfiyUID[i32_cnt]);

    }



    SYS_LockReg();



    /************* User change UID compare implement ***************/

    /* Compare original UID and change UID */

    if((au32mcuUID[0] == au32modfiyUID[0]) && (au32mcuUID[1] == au32modfiyUID[1]) && (au32mcuUID[2] == au32modfiyUID[2]))

    {

        printf("=> Match UID, MCU toggle PB13...\n");

        while(1)

        {

            Delay_count(500);

            P35 = 0;

            Delay_count(500);

            P35 = 1;

        }

    }

    else

    {

        printf("=> Conflict UID, MCU enter suspend...\n");

        __WFI();

    }



    while(1);

}