请教嵌入式开发

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请教嵌入式开发 [复制链接]

请问一下一个嵌入式开发的系统其主函数就下面一小段代码，它怎么就能撑的起一个系统的运行呢  谁能帮我讲一下  。也不知道该不该怎么这个版面提问，请高手指点迷津

INT16U writecnt=0;
INT16U readcnt =0;
OS_TID TASK_KEY;


void init_task (void) __task
{
// INT8U  err;
// INT8U i;
// INT32U KEYTIME;
INT32U volatile start;
// POSINFO_REC PosInfo;
if(C_EPara>=1)
{
      LANGUE = CHINESE;
}
else
{
      LANGUE = ENGLISH;
}

init_tk = os_tsk_self ();
//sys init

Beep();
ADC_INIT();
//startx:

I2cInit(60000);
SysParaInit();

KeyInit();
GUI_Initialize();
GUI_SetColor(1, 0);
LCM_BK_ON();
//for (start = 0; start < 1000000; start++) { ; }

//os_dly_wait(5);

#if STAT > 15
PINSEL1 = PINSEL1&~(3 << (2*(STAT-16)));
#else
PINSEL0 = PINSEL0&~(3 <<(2* (STAT)));
#endif
IO0DIR =IO0DIR&(~(1< //BUZZ_ON();
//os_dly_wait(5);
//for (start = 0; start < 1000000; start++) { ; }
BUZZ_OFF();

SpiInit();
SST25VF_init();

UnWP();
EWSR();
WRSR(0);

WREN();
SysUnitIdInit();
SelectMenuIco();
}

int main (void)
{

//#ifdef MCB2100
INT32U volatile start;
//  INT8U i;
/* Wait for debugger connection*/
for (start = 0; start < 10000; start++) { ; }
IO0SET = (1< #if SELF_ON > 15
PINSEL1 = PINSEL1&~(3 << (2*(SELF_ON-16)));
#else
PINSEL0 = PINSEL0&~(3 << (2*(SELF_ON)));
#endif
// IO0SET = (1< // IO0DIR = IO0DIR|(1< //
// IO0SET = (1<
IO0DIR = IO0DIR&(~(1<
for (start = 0; start < 2000000; start++) { ; }
//#endif
OsEnterSum =0;
os_sys_init_prio (init_task,9);
}