"完成了433多数据同时接收的时候的冲突问题，解决了网络未连接会卡死整个程序的问题“

Core/Inc/main.h

@@ -73,7 +73,7 @@ extern "C" {
    🚀 核心身份标识：烧录不同设备时，请务必修改这个数字！
    比如：设备A烧录时改为 0x01，设备B烧录时改为 0x02
    ========================================================= */
-#define MY_DEVICE_ID  0x01
+#define MY_DEVICE_ID  0x02
 /* USER CODE END EM */
 
 /* Exported functions prototypes ---------------------------------------------*/

Core/Inc/multi_uart_router.h

@@ -64,6 +64,8 @@ typedef struct {
     uint32_t tx_count;
     uint32_t error_count;
     bool initialized;
+    volatile bool csma_backoff_active;
+    volatile uint32_t csma_backoff_until;
 } uart_port_context_t;
 
 void MultiUART_Init(void);

Core/Src/main.c

@@ -127,7 +127,7 @@ void RF433_SendPacket(uint8_t type, const uint8_t *payload, uint8_t len)
 
     frame[frame_idx++] = PROTO_START_BYTE;          // AA
     frame[frame_idx++] = type;                      // TYPE
-    frame[frame_idx++] = (uint8_t)(len + 1);    // LEN (ID + Payload)
+    frame[frame_idx++] = (uint8_t)(len + 1 + 1);    // LEN (ID + Payload + SUM)
     frame[frame_idx++] = MY_DEVICE_ID;              // ID
 
     if (len > 0 && payload != NULL) {

Core/Src/multi_uart_router.c

@@ -42,6 +42,16 @@
 #define DEBUG_LOG(fmt, ...)
 #endif
 
+/*==============================================================================
+ * CSMA/CA 随机退避相关
+ *============================================================================*/
+static uint32_t csma_rand(uint32_t seed)
+{
+    // static uint32_t seed = 12345;
+    seed = seed * 1103515245 + 12345;
+    return (seed >> 16) & 0x7FFF;
+}
+
 /*==============================================================================
  * 全局变量定义
  *============================================================================*/
@@ -235,16 +245,23 @@ static void tx_kickoff(port_id_t port_id)
 
     __disable_irq();
     if (!ring->is_sending && ring->count > 0) {
-        /* --- 核心修复：针对 RF433 (UART1) 执行包级 LBT 检查 --- */
         if (port_id == PORT_433) {
-            // 如果 AUX 为低电平，说明信道忙（接收中或正在发送前一包），暂缓起步
+            if (ctx->csma_backoff_active) {
+                if ((int32_t)(HAL_GetTick() - ctx->csma_backoff_until) < 0) {
+                    __enable_irq();
+                    return;
+                }
+                ctx->csma_backoff_active = false;
+            }
+
             if (HAL_GPIO_ReadPin(AUX_GPIO_Port, AUX_Pin) == GPIO_PIN_RESET) {
+                ctx->csma_backoff_active = true;
+                ctx->csma_backoff_until = HAL_GetTick() + (csma_rand(HAL_GetTick()) % 1000) + 1;
                 __enable_irq();
                 return;
             }
         }
 
-        /* 取出下一个待发送字节 */
         byte = ring->buffer[ring->tail];
         ring->tail = (ring->tail + 1) % UART_TX_BUFFER_SIZE;
         ring->count--;
@@ -297,6 +314,10 @@ void MultiUART_Init(void)
         ctx->tx_count = 0;
         ctx->error_count = 0;
         ctx->initialized = true;
+
+        /* 初始化 CSMA/CA 随机退避状态 */
+        ctx->csma_backoff_active = false;
+        ctx->csma_backoff_until = 0;
     }
 
     DEBUG_LOG("Init OK, %d ports configured", PORT_COUNT);

User/wiz_interface/wiz_interface.c

@@ -2,6 +2,7 @@
 #include "wiz_platform.h"
 #include "wizchip_conf.h"
 #include "dhcp.h"
+#include "main.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -93,15 +94,18 @@ void wiz_delete_timer(void (*func)(void))
 }
 
 /**
- * @brief wiz timer event handler
+ * @brief wiz timer event handler (using HAL_GetTick)
  *
  * You must add this function to your 1ms timer interrupt
  *
  */
 void wiz_timer_handler(void)
 {
+    static uint32_t last_tick = 0;
+    uint32_t current_tick = HAL_GetTick();
 
-    wiz_delay_ms_count++;
+    if (current_tick != last_tick) {
+        last_tick = current_tick;
         struct wiz_timer *temp = wiz_timer_head;
         while (temp != NULL)
         {
@@ -114,36 +118,36 @@ void wiz_timer_handler(void)
             temp = temp->next;
         }
     }
+}
 
 /**
- * @brief Delay function in milliseconds
+ * @brief Delay function in milliseconds (using HAL_GetTick)
  * @param nms :Delay Time
  */
 void wiz_user_delay_ms(uint32_t nms)
 {
-    wiz_delay_ms_count = 0;
+    uint32_t start = HAL_GetTick();
-    while (wiz_delay_ms_count < nms)
+    while ((HAL_GetTick() - start) < nms) {
-    {
     }
 }
 
 /**
- * @brief Check the WIZCHIP version
+ * @brief Check the WIZCHIP version (with timeout)
  */
 void wizchip_version_check(void)
 {
     uint8_t error_count = 0;
-    while (1)
+    uint32_t start_tick = HAL_GetTick();
+    while ((HAL_GetTick() - start_tick) < 5000)
     {
-        wiz_user_delay_ms(1000);
+        wiz_user_delay_ms(100);
         if (getVERSIONR() != W5500_VERSION)
         {
             error_count++;
             if (error_count > 5)
             {
-                printf("error, W5500 version is 0x%02x, but read W5500 version value = 0x%02x\r\n", W5500_VERSION, getVERSIONR());
+                printf("WARN: W5500 version check failed, SPI may be disconnected\r\n");
-                while (1)
+                break;
-                    ;
             }
         }
         else
@@ -165,25 +169,26 @@ void wiz_print_phy_info(void)
 }
 
 /**
- * @brief Ethernet Link Detection
+ * @brief Ethernet Link Detection (with timeout)
  */
 void wiz_phy_link_check(void)
 {
     uint8_t phy_link_status;
-    do
+    uint32_t start_tick = HAL_GetTick();
+
+    while ((HAL_GetTick() - start_tick) < 10000)
     {
-        wiz_user_delay_ms(1000);
+        wiz_user_delay_ms(500);
         ctlwizchip(CW_GET_PHYLINK, (void *)&phy_link_status);
         if (phy_link_status == PHY_LINK_ON)
         {
             printf("PHY link\r\n");
             wiz_print_phy_info();
+            return;
         }
-        else
-        {
-            printf("PHY no link\r\n");
     }
-    } while (phy_link_status == PHY_LINK_OFF);
+
+    printf("WARN: PHY link timeout, using static config\r\n");
 }
 
 /**

docs/报文.md

@@ -13,7 +13,7 @@ AA  TYPE  LEN  ID  [PAYLOAD]  SUM
  |    |    |   |       |       +-- 校验和：从 AA 到 PAYLOAD 结束的所有字节累加和 (取低8位)
  |    |    |   |       +---------- 载荷数据：具体的业务数据内容
  |    |    |   +------------------ 设备 ID：当前发送设备的唯一标识 (MY_DEVICE_ID)
- |    |    +---------------------- 长度：指明后续 [ID + PAYLOAD] 的总字节数
+ |    |    +---------------------- 长度：指明后续 [ID + PAYLOAD + SUM] 的总字节数
  |    +--------------------------- 数据类型：区分数据来源 (10, 55, 48, AA)
  +-------------------------------- 起始符：固定为 0xAA
 ```
@@ -26,13 +26,13 @@ AA  TYPE  LEN  ID  [PAYLOAD]  SUM
 当板载 4 路数字输入 (DI) 电平发生变化时，立即发送此包。
 
 ```text
-AA  10  02  ID  XX  SUM
+AA  10  03  ID  XX  SUM
 --  --  --  --  --  ---
  |   |   |   |   |   |
  |   |   |   |   |   +-- 校验和
  |   |   |   |   +------ I/O 状态位 (Bit0:DI1, Bit1:DI2, Bit2:DI3, Bit3:DI4)
  |   |   |   +---------- 本机设备 ID
- |   |   +-------------- 长度固定为 0x02 (ID + 1字节状态)
+ |   |   +-------------- 长度固定为 0x03 (ID + 1字节状态 + SUM)
  |   +------------------ 类型标识：0x10 (I/O Data)
  +---------------------- 固定起始符
 ```
@@ -47,7 +47,7 @@ AA  48  LEN  ID  [DATA]  SUM
  |   |   |   |     |      +-- 校验和
  |   |   |   |     +--------- RS485 原始数据内容
  |   |   |   +--------------- 本机设备 ID
- |   |   +------------------- 长度：(1 + 原始数据长度)
+ |   |   +------------------- 长度：(1 + 原始数据长度 + SUM)
  |   +----------------------- 类型标识：0x48 (RS485 Data)
  +--------------------------- 固定起始符
 ```
@@ -62,7 +62,7 @@ AA  55  LEN  ID  [DATA]  SUM
  |   |   |   |     |      +-- 校验和
  |   |   |   |     +--------- 网络原始数据内容
  |   |   |   +--------------- 本机设备 ID
- |   |   +------------------- 长度：(1 + 原始数据长度)
+ |   |   +------------------- 长度：(1 + 原始数据长度 + SUM)
  |   +----------------------- 类型标识：0x55 (Net Data)
  +--------------------------- 固定起始符
 ```
@@ -71,14 +71,14 @@ AA  55  LEN  ID  [DATA]  SUM
 系统定时上报当前存活状态，包含当前的 I/O 状态及防丢包序列号。
 
 ```text
-AA  AA  04  ID  [IO] [SEQ_H] [SEQ_L]  SUM
+AA  AA  05  ID  [IO] [SEQ_H] [SEQ_L]  SUM
 --  --  --  --  ---- ------- -------  ---
  |   |   |   |    |      |       |     |
  |   |   |   |    |      |       |     +-- 校验和
  |   |   |   |    |      +-------+-------- 2字节序列号 (0-65535, 循环自增)
  |   |   |   |    +----------------------- 当前 4 路 I/O 状态位
  |   |   |   +---------------------------- 本机设备 ID
- |   |   +-------------------------------- 长度固定为 0x04 (ID + 3字节Payload)
+ |   |   +-------------------------------- 长度固定为 0x05 (ID + 3字节Payload + SUM)
  |   +------------------------------------ 类型标识：0xAA (Heartbeat)
  +---------------------------------------- 固定起始符
 ```