iap实验的一个疑问

zjtzlqr

u32 cnt;

u8 cntflag;

int main(void)

{  

u8 t;

u8 key;

u16 oldcount=0; //??????????????????

u16 applenth=0; //????????app?ú???¤??

u8 clearflag=0;

uart_init(256000); //????????????256000

delay_init();   //???±?????? 

LCD_Init();

LED_Init();   //????????LED??????????????

  KEY_Init(); //°??ü??????

  POINT_COLOR=RED;//?è??×??????ì?? 

LCD_ShowString(60,50,200,16,16,"Warship STM32");

LCD_ShowString(60,70,200,16,16,"IAP TEST");

LCD_ShowString(60,90,200,16,16,"ATOM@ALIENTEK");

LCD_ShowString(60,110,200,16,16,"2012/9/24");  

LCD_ShowString(60,130,200,16,16,"WK_UP:Copy APP2FLASH");

LCD_ShowString(60,150,200,16,16,"KEY1:Erase SRAM APP");

LCD_ShowString(60,170,200,16,16,"KEY0:Run SRAM APP");

LCD_ShowString(60,190,200,16,16,"KEY2:Run FLASH APP");

POINT_COLOR=BLUE;

//?????á??????

POINT_COLOR=BLUE;//?è??×?????????  

while(1)

{

if(cntflag==0)

{

cnt++;

}

cnt++;

if(USART_RX_CNT)

{

if(oldcount==USART_RX_CNT)//????????,????????????????,????±????????????ê??.

{

applenth=USART_RX_CNT;

oldcount=0;

USART_RX_CNT=0;

printf("???§???ò?????ê??!\r\n");

printf("?ú???¤??:%dBytes\r\n",applenth);

}else oldcount=USART_RX_CNT;

}

t++;

delay_ms(10);

if(t==30)

{

LED0=!LED0;

t=0;

if(clearflag)

{

clearflag--;

if(clearflag==0)LCD_Fill(60,210,240,210+16,WHITE);//????????

}

}    

key=KEY_Scan(0);

if(key==KEY_UP)

{

if(applenth)

{

printf("?????ü??????...\r\n");

LCD_ShowString(60,210,200,16,16,"Copying APP2FLASH...");

  if(((*(vu32*)(0X20001000+4))&0xFF000000)==0x08000000)//??????·???0X08XXXXXX.

{  

iap_write_appbin(FLASH_APP1_ADDR,USART_RX_BUF,applenth);//?ü??FLASH?ú??   

delay_ms(100);

LCD_ShowString(60,210,200,16,16,"Copy APP Successed!!");

printf("?????ü???ê??!\r\n");

}else 

{

LCD_ShowString(60,210,200,16,16,"Illegal FLASH APP!  ");   

printf("·?FLASH???????ò!\r\n");

}

  }else 

{

printf("?????????ü????????!\r\n");

LCD_ShowString(60,210,200,16,16,"No APP!");

}

clearflag=7;//±ê???ü????????,?????è??7*300ms?ó????????  

}

if(key==KEY_DOWN)

{

if(applenth)

{  

printf("?????????ê??!\r\n");    

LCD_ShowString(60,210,200,16,16,"APP Erase Successed!");

applenth=0;

}else 

{

printf("??????????????????!\r\n");

LCD_ShowString(60,210,200,16,16,"No APP!");

}

clearflag=7;//±ê???ü????????,?????è??7*300ms?ó????????  

}

if(key==KEY_LEFT)

{

printf("????????FLASH???§?ú??!!\r\n");

if(((*(vu32*)(FLASH_APP1_ADDR+4))&0xFF000000)==0x08000000)//??????·???0X08XXXXXX.

{  

iap_load_app(FLASH_APP1_ADDR);//????FLASH APP?ú??

}else 

{

printf("·?FLASH???????ò,??·¨????!\r\n");

LCD_ShowString(60,210,200,16,16,"Illegal FLASH APP!");   

}  

clearflag=7;//±ê???ü????????,?????è??7*300ms?ó????????  

}

if(key==KEY_RIGHT)

{

printf("????????SRAM???§?ú??!!\r\n");

if(((*(vu32*)(0X20001000+4))&0xFF000000)==0x20000000)//??????·???0X20XXXXXX.

{  

iap_load_app(0X20001000);//SRAM???·

}else 

{

printf("·?SRAM???????ò,??·¨????!\r\n");

LCD_ShowString(60,210,200,16,16,"Illegal SRAM APP!");   

}  

clearflag=7;//±ê???ü????????,?????è??7*300ms?ó????????  

}

if(cnt==1000)

{

cntflag = 1;

printf("????????FLASH???§?ú??!!\r\n");

if(((*(vu32*)(FLASH_APP1_ADDR+4))&0xFF000000)==0x08000000)//??????·???0X08XXXXXX.

{  

iap_load_app(FLASH_APP1_ADDR);//????FLASH APP?ú??

}else 

{

printf("·?FLASH???????ò,??·¨????!\r\n");

LCD_ShowString(60,210,200,16,16,"Illegal FLASH APP!");   

}  

clearflag=7;//±ê???ü????????,?????è??7*300ms?ó????????  

}

 

}     

}




iap实验的一个疑问

我在main函数里面while循环最后加了一个cnt的判断，当cnt自增到1000就执行和左键一样的操作，就是实现从iap到app的跳转，但是奇怪的是程序貌似每隔20秒左右就从iap跳到app，然后在跳到iap，一直反反复复，我的代码不是应该和按左键效果一样吗？

zjtzlqr

keil4.7a不太支持中文

正点原子

回复【2楼】zjtzlqr:
---------------------------------
你可以仿真跟踪一下啊。

zjtzlqr

刚才那个问题解决了

#define FLASH_APP1_ADDR 0x08010000 

iap_load_app(FLASH_APP1_ADDR);//????FLASH APP?ú??

void iap_load_app(u32 appxaddr)
{
if(((*(vu32*)appxaddr)&0x2FFE0000)==0x20000000) //?ì?é???????·??·???·¨.
{ 
jump2app=(iapfun)*(vu32*)(appxaddr+4); //???§?ú??????????×??????ò???????·(???????·)
MSR_MSP(*(vu32*)appxaddr); //??????APP????????(???§?ú????????????×???????·????????·)
jump2app(); //??×???APP.
}
}  




0x08010000&0x2FFE0000==0x20000000的结果应该是个0把，怎么可以实现代码跳到app的

zjtzlqr

上面这个明白了，我发现在跑的时候跑完app会重新跑到iap，然后iap的main函数会连续执行四遍，跑马灯发现的。在main函数最前面做了一个跑马灯