#include "rtos.h"//加的库Thread thread1;//外部声明void servo1_thread() {    while (true)     {              Thread::signal_wait(0x001);        ...          }}thread1.start(servo1_thread);thread1.signal_set(0x001);thread1.terminate( );//read_threadvoid read_thread(){     d = pc.getc();}void servo8_thread() {    thread9.terminate( );    if(Ein == 1)    {        pc.printf("s");        wait(0.5);    }    thread9.start(read_thread);}