【已解决】使用邮箱时遇到的问题

发布于 2013-06-01 21:05:53 浏览：2940 订阅该版

7 个回答

bernard 2013-06-01

这家伙很懒，什么也没写！

rtthsl 2013-06-03

这家伙很懒，什么也没写！

>内存被覆盖、改写、栈撤销。。。
>
>上你的代码

---

声明的

```
#ifndef _KEY_H
#define _KEY_H
#include <rtthread.h>

void key_thread_entry(void *para);

static rt_mailbox_t mb_key;

#endif
```

创建的，在rt_application_init里创建的

```
	//init key mb and thread
	mb_key = rt_mb_create("mb_key",8,RT_IPC_FLAG_FIFO);
	if (mb_key != RT_NULL) rt_kprintf("mb ok!
");
	init_thread = rt_thread_create("key",key_thread_entry,RT_NULL,2048,7,10);
	rt_thread_startup(init_thread);
	init_thread = RT_NULL;
```

接收的

```
void beep_thread_entry(void *para)
{
	rt_uint32_t tmp = 0;
	
	beep_init();
	
	while (1)
	{
		if (rt_mb_recv(mb_key,&tmp,50)==RT_EOK){
			rt_kprintf("tmp=%d
",tmp);
			rt_thread_delay(RT_TICK_PER_SECOND/2);
			GPIOB->ODR |= 1<<8;
			rt_thread_delay(RT_TICK_PER_SECOND/2);
			GPIOB->ODR &= ~(1<<8);
		}
		else
			rt_kprintf("recv key error!
");
	}
}
```

发送的

```

void key_thread_entry(void *para)
{
	static rt_uint8_t key_state = 0;
	static rt_uint32_t key_var = 0;
	
	key_init();
		
	while (1)
	{
		switch (key_state)
		{
			case 0:
				if (PRESSED){
					key_state = 1;
				}
				break;
			case 1:
				if (PRESSED){
					if (KEY0==0) key_var = KEY_RIGHT;
					if (KEY1==0) key_var = KEY_DOWN; 
					if (KEY2==0) key_var = KEY_LEFT;
					if (KEY3==1) key_var = KEY_UP;
					key_state = 2;
				}
				else{
					key_state = 0;
				}
				break;
			case 2:
				if (PRESSED){
					key_state = 2;
				}
				else{
					key_state = 0;
				}
				break;
			default:break;
		}
		if (key_var > 0){
			if (rt_mb_send_wait(mb_key,(rt_uint32_t)key_var,10)==RT_EOK){
				rt_kprintf("key send ok!
");
				key_var = 0;
			}
			else
				rt_kprintf("key send error!
");
		}
		rt_thread_delay(RT_TICK_PER_SECOND/50);
	}
}
```

rtthsl 2013-06-03

这家伙很懒，什么也没写！

这是rt_application_init完整的代码

```

int rt_application_init()
{
	rt_thread_t init_thread;

rt_err_t result;
	
	//init key mb and thread
	mb_key = rt_mb_create("mb_key",8,RT_IPC_FLAG_FIFO);
	if (mb_key != RT_NULL) rt_kprintf("mb ok!
");
	init_thread = rt_thread_create("key",key_thread_entry,RT_NULL,2048,7,10);
	rt_thread_startup(init_thread);
	init_thread = RT_NULL;
	
	//init beep thread	
	init_thread = rt_thread_create("beep",beep_thread_entry,RT_NULL,2048,9,10);	
	rt_thread_startup(init_thread);	
	init_thread = RT_NULL;

/* init led thread */
	result = rt_thread_init(&led_thread,
		"led",
		led_thread_entry, RT_NULL,
		(rt_uint8_t*)&led_stack[0], sizeof(led_stack), 20, 5);
	if (result == RT_EOK)
	{
        rt_thread_startup(&led_thread);
	}

#if (RT_THREAD_PRIORITY_MAX == 32)
	init_thread = rt_thread_create("init",
								rt_init_thread_entry, RT_NULL,
								2048, 8, 20);
#else
	init_thread = rt_thread_create("init",
								rt_init_thread_entry, RT_NULL,
								2048, 80, 20);
#endif

if (init_thread != RT_NULL)
		rt_thread_startup(init_thread);

return 0;
}

```