microros通信问题

天问

ros版本：foxy
库：根据网上教程自己生成的foxy版本的库链接文本，所以应该不是版本问题。
硬件：STM32F407ZGT6
程序：```
/* Includes ------------------------------------------------------------------*/
#include "FreeRTOS.h"
#include "task.h"
#include "main.h"
#include "cmsis_os.h"
#include "usart.h"
#include "microros_tasks.h"
#include "microros_allocators.h"
#include "STM_custom_transport.h"
#include "std_msgs/msg/int32.h"

uint8_t ch = 'c';
int i=0;

/* Private includes ----------------------------------------------------------/
/ USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------/
typedef StaticTask_t osStaticThreadDef_t;
/ USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------/
/ USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------/
/ USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------/
/ USER CODE BEGIN Variables */

/* USER CODE END Variables /
/ Definitions for defaultTask /
osThreadId_t defaultTaskHandle;
const osThreadAttr_t defaultTask_attributes = {
.name = "defaultTask",
.stack_size = 128 * 4,
.priority = (osPriority_t) osPriorityNormal,
};
/ Definitions for LED1 /
osThreadId_t LED1Handle;
const osThreadAttr_t LED1_attributes = {
.name = "LED1",
.stack_size = 128 * 4,
.priority = (osPriority_t) osPriorityAboveNormal,
};
/ Definitions for Microros */
osThreadId_t MicrorosHandle;
uint32_t MicrorosBuffer[ 3000 ];
osStaticThreadDef_t MicrorosControlBlock;
const osThreadAttr_t Microros_attributes = {
.name = "Microros",
.cb_mem = &MicrorosControlBlock,
.cb_size = sizeof(MicrorosControlBlock),
.stack_mem = &MicrorosBuffer[0],
.stack_size = sizeof(MicrorosBuffer),
.priority = (osPriority_t) osPriorityHigh,
};

/* Private function prototypes -----------------------------------------------/
/ USER CODE BEGIN FunctionPrototypes */

/* USER CODE END FunctionPrototypes */

void StartDefaultTask(void *argument);
void LED1_Task(void *argument);
void Microros_Task(void *argument);

void MX_FREERTOS_Init(void); /* (MISRA C 2004 rule 8.1) */

/**

@brief FreeRTOS initialization
@param None
@retval None
*/
void MX_FREERTOS_Init(void) {

defaultTaskHandle = osThreadNew(StartDefaultTask, NULL, &defaultTask_attributes);
/* creation of LED1 /
LED1Handle = osThreadNew(LED1_Task, NULL, &LED1_attributes);
// / creation of Microros */
MicrorosHandle = osThreadNew(Microros_Task, NULL, &Microros_attributes);
}

/* USER CODE END Header_StartDefaultTask */
void StartDefaultTask(void argument)
{
while(1){
HAL_GPIO_TogglePin(LED_2_GPIO_Port, LED_2_Pin);
osDelay(1000);
/ USER CODE END StartDefaultTask */
}
}

/* USER CODE END Header_LED1_Task */
void LED1_Task(void *argument)
{

/* USER CODE BEGIN LED1_Task /
/ Infinite loop /
while(1){
HAL_GPIO_TogglePin(LED_1_GPIO_Port, LED_1_Pin);
osDelay(1000);
/ USER CODE END LED1_Task */
}
}

/* USER CODE END Header_Microros_Task */
void Microros_Task(void argument)
{
/ USER CODE BEGIN StartDefaultTask */
rmw_uros_set_custom_transport(
true,
(void *) &huart1,
cubemx_transport_open,
cubemx_transport_close,
cubemx_transport_write,
cubemx_transport_read);

rcl_allocator_t freeRTOS_allocator = rcutils_get_zero_initialized_allocator();
freeRTOS_allocator.allocate = microros_allocate;
freeRTOS_allocator.deallocate = microros_deallocate;
freeRTOS_allocator.reallocate = microros_reallocate;
freeRTOS_allocator.zero_allocate = microros_zero_allocate;

if (!rcutils_set_default_allocator(&freeRTOS_allocator)) {
printf("Error on default allocators (line %d)\n", LINE);
}

// micro-ROS app

rcl_publisher_t publisher;
std_msgs__msg__Int32 msg;
rclc_support_t support;
rcl_allocator_t allocator;
rcl_node_t node;

allocator = rcl_get_default_allocator();

//create init_options
rclc_support_init(&support, 0, NULL, &allocator);

// create node
rclc_node_init_default(&node, "cubemx_node", "", &support);

// create publisher
rclc_publisher_init_default(
&publisher,
&node,
ROSIDL_GET_MSG_TYPE_SUPPORT(std_msgs, msg, Int32),
"cubemx_publisher");

msg.data = 0;

for(;;)
{
rcl_ret_t ret = rcl_publish(&publisher, &msg, NULL);
if (ret != RCL_RET_OK)
{
printf("Error publishing (line %d)\n", LINE);
}

msg.data++;
osDelay(10);

}
/* USER CODE END StartDefaultTask */
}

问题：当运行代理时可以检测到信息，但是运行命令无法查询到创建的话题，具体如下图
![屏幕截图 2023-07-13 150702.png](/forum/assets/uploads/files/1689236095760-屏幕截图-2023-07-13-150702-resized.png) 
![屏幕截图 2023-07-13 150650.png](/forum/assets/uploads/files/1689236103715-屏幕截图-2023-07-13-150650.png)

天问

@2918095496 屏幕截图 2023-07-13 150702.png
屏幕截图 2023-07-13 150650.png
上面两张图好像有问题，补充一下

天问

@2918095496 这个经过测试，找到了问题所在，在程序运行过程中，有几个语句的初始化出现了问题，导致了以上的问题出现，具体问题如下：
void StartDefaultTask(void *argument)
{
//micro-ROS configuration
rmw_uros_set_custom_transport(
true,
(void *) &huart1,
cubemx_transport_open,
cubemx_transport_close,
cubemx_transport_write,
cubemx_transport_read);

rcl_allocator_t freeRTOS_allocator = rcutils_get_zero_initialized_allocator();
freeRTOS_allocator.allocate = microros_allocate;
freeRTOS_allocator.deallocate = microros_deallocate;
freeRTOS_allocator.reallocate = microros_reallocate;
freeRTOS_allocator.zero_allocate = microros_zero_allocate;

if (!rcutils_set_default_allocator(&freeRTOS_allocator)) {
printf("Error on default allocators (line %d)\n", LINE);
}

// micro-ROS app

rcl_publisher_t publisher;
std_msgs__msg__Int32 msg;
rclc_support_t support;
rcl_allocator_t allocator;
rcl_node_t node;

allocator = rcl_get_default_allocator();
//create init_options
rcl_ret_t ret1 = rclc_support_init(&support, 0, NULL, &allocator);
// create node
rcl_ret_t ret2 = rclc_node_init_default(&node, "cubemx_node", "", &support);
// //create publisher
rclc_publisher_init_best_effort(
&publisher,
&node,
ROSIDL_GET_MSG_TYPE_SUPPORT(std_msgs, msg, Int32),
"cubemx_publisher");

msg.data = 0;
for(;;)
{
rcl_ret_t ret = rcl_publish(&publisher, &msg, NULL);
if (ret != RCL_RET_OK)
{
printf("Error publishing (line %d)\n", LINE);
}
msg.data++;
osDelay(10);
}
/* USER CODE END 5 */
}
在以上几个初始化的时候会报错，rclc_support_init（）在这个初始化时有时，返回数字1报一般性错误，rclc_node_init_default（）这个会因为上一个初始化报错，返回数字101，上下文错误，还有就是 rcl_publish（）会返回数字300，RCL_RET_PUBLISHER_INVALID指返回rcl_publisher_t无效。
目前问题还没有解决，希望能给些指导，谢谢。

不惑

@2918095496 请问解决了吗？