给的例程编译都通不过

发布于 2020-04-03 10:40:04 浏览：2275 订阅该版

```c
#include <rtthread.h>
#define THREAD_PRIORITY 25
#define THREAD_STACK_SIZE 512
#define THREAD_TIMESLICE 5

rt_uint32_t SystemCoreClock = 100000;

static rt_thread_t tid1 = RT_NULL;
/* 线程1 的信号处理函数*/
void thread1_signal_handler(int sig)
{
	rt_kprintf("thread1 received signal %d<br>", sig);
}
/* 线程1 的入口函数*/
static void thread1_entry(void *parameter)
{
	int cnt = 0;
	/* 安装信号*/
	rt_signal_install(SIGUSR1, thread1_signal_handler);//安装信号
	rt_signal_unmask(SIGUSR1);//解除信号阻塞
	/* 运行10 次*/
	while (cnt < 10)
	{
		/* 线程1 采用低优先级运行，一直打印计数值*/
		rt_kprintf("thread1 count : %d<br>", cnt);
		cnt++;
		rt_thread_mdelay(100);
	}
}
/* 信号示例的初始化*/
int main(void)
{
	/* 创建线程1 */
	tid1 = rt_thread_create("thread1",
							thread1_entry, RT_NULL,
							THREAD_STACK_SIZE,
							THREAD_PRIORITY, THREAD_TIMESLICE);
	if (tid1 != RT_NULL)
	rt_thread_startup(tid1);
	rt_thread_mdelay(300);
	/* 发送信号SIGUSR1 给线程1 */
	rt_thread_kill(tid1, SIGUSR1);//发送信号
	return 0;
}

/* 导出到msh 命令列表中*/
MSH_CMD_EXPORT(signal_sample, signal sample);
```

```
*** Using Compiler 'V5.06 update 6 (build 750)', folder: 'D:\Keil_v5\ARM\ARMCC\Bin'
Rebuild target 'Target 1'
compiling core_cm0.c...
compiling main.c...
assembling startup_ht60xx.s...
compiling CpuCfg.c...
assembling context_rvds.S...
compiling cpuport.c...
compiling clock.c...
compiling idle.c...
compiling irq.c...
compiling ipc.c...
compiling components.c...
compiling mem.c...
compiling kservice.c...
compiling object.c...
D:\Keil_v5\ARM\PACK\RealThread\RT-Thread\3.1.3\src\object.c(262): warning:  #550-D: variable "obj"  was set but never used
          struct rt_object *obj;
D:\Keil_v5\ARM\PACK\RealThread\RT-Thread\3.1.3\src\object.c: 1 warning, 0 errors
compiling scheduler.c...
compiling timer.c...
compiling board.c...
compiling thread.c...
linking...
.\Objects\001.axf: Error: L6218E: Undefined symbol rt_signal_install (referred from main.o).
.\Objects\001.axf: Error: L6218E: Undefined symbol rt_signal_unmask (referred from main.o).
.\Objects\001.axf: Error: L6218E: Undefined symbol rt_thread_create (referred from main.o).
.\Objects\001.axf: Error: L6218E: Undefined symbol rt_thread_kill (referred from main.o).
.\Objects\001.axf: Error: L6218E: Undefined symbol rt_system_signal_init (referred from components.o).
.\Objects\001.axf: Error: L6218E: Undefined symbol rt_thread_free_sig (referred from idle.o).
.\Objects\001.axf: Error: L6218E: Undefined symbol rt_thread_handle_sig (referred from scheduler.o).
Not enough information to list image symbols.
Not enough information to list load addresses in the image map.
Finished: 2 information, 0 warning and 7 error messages.
".\Objects\001.axf" - 7 Error(s), 1 Warning(s).
Target not created.
Build Time Elapsed:  00:00:05
```