最近在STM32F103VET6的MCU上进行了IAP升级的钻研,写出了IAP的升级程序以及一个桌面的升级终端,现在将一些心得跟过程分享出来
首先,最重要的当然是要对于STM32的FLASH要有一定的理解啦,这个可以去原子哥的开发手册里面参考一下,有对于FLASH 的介绍
大伙儿可以看看从网上搜的,其他高手写的介绍
http://blog.chinaunix.net/uid-20617446-id-3847242.html 或者也可以自己去问度娘,一大堆
好啦,下面进入正题,我使用的STM32F103VET6的FLASH是512K的,所以我将FLASH分为4个区域,分别是IAP , APP1,APP2还有剩下的一部分区域用来存放一些FLAG,如下[mw_shl_code=cpp,true]#define FLASH_Base_ADDR 0x08000000 //IAP APP Addr: 0x08000000 - 0x08019000 (size:100k) //bootloader
#define FLASH_Sector_A_StartAddr 0x08019000 //Sector A Addr: 0x08019000 - 0x0803E800 (size:150k) //APP1
#define FLASH_Sector_B_StartAddr 0x0803E800 //Sector B Addr: 0x0803E800 - 0x08064000 (size:150k) //APP2[/mw_shl_code]
实际上,bootloader区留个20-30K就很足够了,我留了100K简直太多余了。主要实现的是对于从IAP升级到APP1 或者 APP2,如果当前程序工作在APP1区,那么接下来将会升级将会APP2的区域进行,如果当前程序工作在APP2区,那么就擦写APP1区,这么做有一个好处,就是万一升级出现错误,我们还可以退回到原程序。说的通俗一点,就是整个BootLoader是一个跳板,无论是进行升级,还是掉电重新运行APP,都是要通过BootLoader。整个升级区域跳转如下
我们定一个标志位#define FLASH_Running_APP_Flag 0x08065000 //0x08064800 - 0x08065000 (size:2k) 0x1234:run IAP 0x4567:run App1 0x6789:run APP2
当有程序被刷进去后,每次重新上电,程序会读取一个标志位,然后根据读取来的东西,再选择跳转到APP
工作还是进行IAP
升级[mw_shl_code=cpp,true] if(Read_Whole_Word(FLASH_Running_APP_Flag)==0x4567) //Load in sector A
{
#if DEBUG_MODE
printf("go to sector A
");
#endif
Load_From_Sector(FLASH_Sector_A_StartAddr);
}
if(Read_Whole_Word(FLASH_Running_APP_Flag)==0x6789) //Load in sector B
{
#if DEBUG_MODE
printf("go to sector B
");
#endif
Load_From_Sector(FLASH_Sector_B_StartAddr);
}
else //IAP
{
#if DEBUG_MODE
printf("got to IAP
");
#endif
while(1)
{
TIMER_Event_Handler();
}
}[/mw_shl_code]
我们定一个标志位[mw_shl_code=cpp,true]#define FLASH_Running_APP_Flag 0x08065000 //0x08064800 - 0x08065000 (size:2k) 0x1234:run IAP 0x4567:run App1 0x6789:run APP2
[/mw_shl_code]
当有程序被刷进去后,每次重新上电,程序会读取一个标志位,然后根据读取来的东西,再选择跳转到APP
工作还是进行IAP
升级
u16 crc_ta[256]={
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
};
一周热门 更多>