刚学UC/OS，有不懂的地方请教各位：
看书中写在OSStart()后要安装并启动UC/OS的时钟节拍，但我看书中实例怎么样没写？？（红色部分没出现）
void main (void)
{
PC_DispClrScr(DISP_FGND_WHITE + DISP_BGND_BLACK); /* Clear the screen */
OSInit(); /* Initialize uC/OS-II */
PC_DOSSaveReturn(); /* Save environment to return to DOS */
PC_VectSet(uCOS, OSCtxSw); /* Install uC/OS-II's context switch vector */
RandomSem = OSSemCreate(1); /* Random number semaphore */
OSTaskCreate(TaskStart, (void *)0, &TaskStartStk[TASK_STK_SIZE - 1], 0);
OSStart(); /* Start multitasking */
}
void TaskStart (void *pdata)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
char s[100];
INT16S key;
pdata = pdata; /* Prevent compiler warning */
TaskStartDispInit(); /* Initialize the display */
OS_ENTER_CRITICAL();
PC_VectSet(0x08, OSTickISR); /* Install uC/OS-II's clock tick ISR */
PC_SetTickRate(OS_TICKS_PER_SEC); /* Reprogram tick rate */
OS_EXIT_CRITICAL();
OSStatInit(); /* Initialize uC/OS-II's statistics */
TaskStartCreateTasks(); /* Create all the application tasks */
for (;;) {
TaskStartDisp(); /* Update the display */
if (PC_GetKey(&key) == TRUE) { /* See if key has been pressed */
if (key == 0x1B) { /* Yes, see if it's the ESCAPE key */
PC_DOSReturn(); /* Return to DOS */
}
}
OSCtxSwCtr = 0; /* Clear context switch counter */
OSTimeDlyHMSM(0, 0, 1, 0); /* Wait one second */
}
} |
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