场景:上位机和下位机通信依靠总线互通编写代码模拟实现: 1) 一个线程模拟发送AT命令 在内存中定义一个全局数组，定义一个信号量Semap AT Cmd，保护全局数组AT Cmd，每5秒发送AT命令，每次交替读传感器数据1和传感器数据2，命令写入该数组。 2) 一个线程模拟传感器节点生成总线返回的数据 获取Semap AT Cmd后，读取全局数组AT Cmd; 调用r = rand0%255;(#include <stdlib.h>) 生成一个随机延迟； 根据命令将模拟传感器数据帧写入全局数组AT Data通过信号量Semap AT Data与其他线程同步 AT Data的读写. 3)一个线程模拟接收总线数据 获取到信号量Semap AT Data后，读取AT Data； 在未超时收到数据时，该线程通过事件集Event与数据处理线程同步 4) 两个线程处理传感器数据 通过事件集Event同步，分别处理传感器1/2数据 基于RT-Thread实现上述要求，要求条理清晰

以下是基于RT-Thread实现上述要求的代码：

#include <rtthread.h>
#include <stdlib.h>

#define AT_CMD_SIZE 50
#define AT_DATA_SIZE 100

static char at_cmd[AT_CMD_SIZE];
static char at_data[AT_DATA_SIZE];

static struct rt_semaphore semap_at_cmd;
static struct rt_semaphore semap_at_data;

static struct rt_event event_sensor1;
static struct rt_event event_sensor2;

static void thread_at_cmd(void *parameter)
{
    rt_uint32_t timeout = 5000;
    rt_uint8_t sensor_data_flag = 0;
    while (1)
    {
        rt_sem_take(&semap_at_cmd, RT_WAITING_FOREVER);
        
        // Generate AT command
        if (sensor_data_flag)
        {
            rt_snprintf(at_cmd, AT_CMD_SIZE, "AT+GET=%d", 2);
            sensor_data_flag = 0;
        }
        else
        {
            rt_snprintf(at_cmd, AT_CMD_SIZE, "AT+GET=%d", 1);
            sensor_data_flag = 1;
        }
        
        rt_sem_release(&semap_at_data);
        rt_thread_mdelay(timeout);
    }
}

static void thread_sensor(void *parameter)
{
    rt_uint32_t timeout = 0;
    rt_uint8_t sensor_id = *(rt_uint8_t *)parameter;
    while (1)
    {
        rt_event_recv(&event_sensor1 + sensor_id - 1, 0x01, RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR, RT_WAITING_FOREVER, &timeout);
        
        // Generate sensor data frame
        rt_uint8_t data = rand() % 255;
        rt_snprintf(at_data, AT_DATA_SIZE, "+DATA=%d,%d", sensor_id, data);
        
        rt_sem_release(&semap_at_cmd);
    }
}

static void thread_receive_data(void *parameter)
{
    rt_uint32_t timeout = 5000;
    while (1)
    {
        rt_sem_take(&semap_at_data, RT_WAITING_FOREVER);
        
        // Simulate receiving data from bus
        rt_uint8_t is_data_received = rand() % 2;
        if (is_data_received)
        {
            rt_event_send(&event_sensor1, 0x01);
            rt_event_send(&event_sensor2, 0x01);
        }
        
        rt_thread_mdelay(timeout);
    }
}

static void thread_process_data1(void *parameter)
{
    rt_uint32_t timeout = 0;
    while (1)
    {
        rt_event_recv(&event_sensor1, 0x01, RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR, RT_WAITING_FOREVER, &timeout);
        
        // Process sensor 1 data
        // ...
    }
}

static void thread_process_data2(void *parameter)
{
    rt_uint32_t timeout = 0;
    while (1)
    {
        rt_event_recv(&event_sensor2, 0x01, RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR, RT_WAITING_FOREVER, &timeout);
        
        // Process sensor 2 data
        // ...
    }
}

int main(void)
{
    rt_thread_t thread_at_cmd = rt_thread_create("at_cmd", thread_at_cmd, RT_NULL,
                                                  1024, 25, 5);
    rt_thread_t thread_sensor1 = rt_thread_create("sensor1", thread_sensor, RT_NULL,
                                                   1024, 20, 5);
    rt_thread_t thread_sensor2 = rt_thread_create("sensor2", thread_sensor, RT_NULL,
                                                   1024, 20, 5);
    rt_thread_t thread_receive_data = rt_thread_create("receive_data", thread_receive_data, RT_NULL,
                                                        1024, 20, 5);
    rt_thread_t thread_process_data1 = rt_thread_create("process_data1", thread_process_data1, RT_NULL,
                                                         1024, 24, 5);
    rt_thread_t thread_process_data2 = rt_thread_create("process_data2", thread_process_data2, RT_NULL,
                                                         1024, 24, 5);
    
    rt_sem_init(&semap_at_cmd, "AT Cmd", 1, RT_IPC_FLAG_FIFO);
    rt_sem_init(&semap_at_data, "AT Data", 0, RT_IPC_FLAG_FIFO);
    
    rt_event_init(&event_sensor1, "Sensor1", RT_IPC_FLAG_FIFO);
    rt_event_init(&event_sensor2, "Sensor2", RT_IPC_FLAG_FIFO);
    
    rt_thread_startup(thread_at_cmd);
    rt_thread_startup(thread_sensor1);
    rt_thread_startup(thread_sensor2);
    rt_thread_startup(thread_receive_data);
    rt_thread_startup(thread_process_data1);
    rt_thread_startup(thread_process_data2);
    
    return 0;
}

上述代码中，使用了RT-Thread提供的信号量和事件集来实现线程之间的同步。其中，`semap_at_cmd`用于保护全局数组`at_cmd`，`semap_at_data`用于同步AT命令和传感器数据帧的读写操作。`event_sensor1`和`event_sensor2`用于同步传感器数据处理线程。同时，使用了RT-Thread提供的线程创建和启动API来创建和启动线程。