串口2接收数据，comm处理信息

.config

@@ -160,7 +160,7 @@ CONFIG_RT_USING_DEVICE_IPC=y
 CONFIG_RT_USING_SERIAL=y
 CONFIG_RT_USING_SERIAL_V1=y
 # CONFIG_RT_USING_SERIAL_V2 is not set
-# CONFIG_RT_SERIAL_USING_DMA is not set
+CONFIG_RT_SERIAL_USING_DMA=y
 CONFIG_RT_SERIAL_RB_BUFSZ=64
 # CONFIG_RT_USING_CAN is not set
 # CONFIG_RT_USING_HWTIMER is not set

.cproject

@@ -68,6 +68,9 @@
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 									<listOptionValue builtIn="false" value="&quot;${workspace_loc://${ProjName}/drivers}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/applications}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/applications/DBSQL}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/applications/DB}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc://${ProjName}/drivers//include}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc://${ProjName}/drivers//include//config}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc://${ProjName}/libraries//CMSIS//Device//ST//STM32F4xx//Include}&quot;"/>
@@ -265,6 +268,8 @@
 							<tool id="ilg.gnuarmeclipse.managedbuild.cross.tool.c.compiler.1026498694" name="GNU ARM Cross C Compiler" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.c.compiler.1570350559">
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 									<listOptionValue builtIn="false" value="&quot;${workspace_loc://${ProjName}/drivers}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/applications/DATA}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/applications/DBSQL}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/applications/RUN_LED}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc://${ProjName}/drivers//include}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc://${ProjName}/drivers//include//config}&quot;"/>
@@ -307,6 +312,97 @@
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 						</toolChain>
 					</folderInfo>
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+					</folderInfo>
 					<sourceEntries>
 						<entry excluding="//cubemx/Drivers|//cubemx/EWARM|//cubemx/Src/stm32f4xx_it.c|//cubemx/Src/system_stm32f4xx.c|//packages/sqlite-v3.19.3/rtthread_io_methods.c|//packages/sqlite-v3.19.3/rtthread_mutex.c|//packages/sqlite-v3.19.3/rtthread_vfs.c|//packages/sqlite-v3.19.3/shell.c|//packages/sqlite-v3.19.3/student_dao.c|//rt-thread/components/dfs/filesystems/nfs|//rt-thread/components/dfs/filesystems/ramfs|//rt-thread/components/dfs/filesystems/romfs|//rt-thread/components/dfs/filesystems/skeleton|//rt-thread/components/drivers/audio|//rt-thread/components/drivers/can|//rt-thread/components/drivers/cputime|//rt-thread/components/drivers/hwcrypto|//rt-thread/components/drivers/hwtimer|//rt-thread/components/drivers/i2c|//rt-thread/components/drivers/misc/adc.c|//rt-thread/components/drivers/misc/dac.c|//rt-thread/components/drivers/misc/pulse_encoder.c|//rt-thread/components/drivers/misc/rt_drv_pwm.c|//rt-thread/components/drivers/misc/rt_inputcapture.c|//rt-thread/components/drivers/mtd|//rt-thread/components/drivers/phy|//rt-thread/components/drivers/pm|//rt-thread/components/drivers/rtc|//rt-thread/components/drivers/sensors|//rt-thread/components/drivers/serial/serial_v2.c|//rt-thread/components/drivers/spi|//rt-thread/components/drivers/touch|//rt-thread/components/drivers/usb|//rt-thread/components/drivers/watchdog|//rt-thread/components/drivers/wlan|//rt-thread/components/fal|//rt-thread/components/libc/compilers/armlibc|//rt-thread/components/libc/compilers/dlib|//rt-thread/components/libc/cplusplus|//rt-thread/components/libc/posix|//rt-thread/components/lwp|//rt-thread/components/net|//rt-thread/components/utilities|//rt-thread/components/vbus|//rt-thread/components/vmm|//rt-thread/libcpu/aarch64|//rt-thread/libcpu/arc|//rt-thread/libcpu/arm/AT91SAM7S|//rt-thread/libcpu/arm/AT91SAM7X|//rt-thread/libcpu/arm/am335x|//rt-thread/libcpu/arm/arm926|//rt-thread/libcpu/arm/armv6|//rt-thread/libcpu/arm/common/divsi3.S|//rt-thread/libcpu/arm/cortex-a|//rt-thread/libcpu/arm/cortex-m0|//rt-thread/libcpu/arm/cortex-m23|//rt-thread/libcpu/arm/cortex-m3|//rt-thread/libcpu/arm/cortex-m33|//rt-thread/libcpu/arm/cortex-m4/context_iar.S|//rt-thread/libcpu/arm/cortex-m4/context_rvds.S|//rt-thread/libcpu/arm/cortex-m7|//rt-thread/libcpu/arm/cortex-r4|//rt-thread/libcpu/arm/dm36x|//rt-thread/libcpu/arm/lpc214x|//rt-thread/libcpu/arm/lpc24xx|//rt-thread/libcpu/arm/realview-a8-vmm|//rt-thread/libcpu/arm/s3c24x0|//rt-thread/libcpu/arm/s3c44b0|//rt-thread/libcpu/arm/sep4020|//rt-thread/libcpu/arm/zynqmp-r5|//rt-thread/libcpu/avr32|//rt-thread/libcpu/blackfin|//rt-thread/libcpu/c-sky|//rt-thread/libcpu/ia32|//rt-thread/libcpu/m16c|//rt-thread/libcpu/mips|//rt-thread/libcpu/nios|//rt-thread/libcpu/ppc|//rt-thread/libcpu/risc-v|//rt-thread/libcpu/rx|//rt-thread/libcpu/sim|//rt-thread/libcpu/sparc-v8|//rt-thread/libcpu/ti-dsp|//rt-thread/libcpu/unicore32|//rt-thread/libcpu/v850|//rt-thread/libcpu/xilinx|//rt-thread/src/cpu.c|//rt-thread/src/memheap.c|//rt-thread/src/signal.c|//rt-thread/src/slab.c|//rt-thread/tools" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name=""/>
 					</sourceEntries>

.settings/language.settings.xml

@@ -5,7 +5,7 @@
 			<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
 			<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
 			<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
-			<provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="-1329242017815709534" id="ilg.gnuarmeclipse.managedbuild.cross.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT ARM Cross GCC Built-in Compiler Settings " parameter="${COMMAND} ${FLAGS} ${cross_toolchain_flags} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
+			<provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="-1258495279358323302" id="ilg.gnuarmeclipse.managedbuild.cross.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT ARM Cross GCC Built-in Compiler Settings " parameter="${COMMAND} ${FLAGS} ${cross_toolchain_flags} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
 				<language-scope id="org.eclipse.cdt.core.gcc"/>
 				<language-scope id="org.eclipse.cdt.core.g++"/>
 			</provider>

applications/DATA/DATA_comm.c

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-10-20     Administrator       the first version
+ */
+/* DATA_comm.c */
+#include <rtthread.h>
+#include "data_comm.h"
+
+rt_mq_t proc_mq;
+
+void proc_thread_entry(void *parameter)
+{
+    struct proc_request *req;
+
+    while (1)
+    {
+        // 接收请求指针
+        if (rt_mq_recv(proc_mq, &req, sizeof(req), RT_WAITING_FOREVER) == RT_EOK)
+        {
+            if (!req) continue;
+
+            rt_kprintf("Processing: %.*s\n", req->input_len, req->input);
+
+            // 示例处理：回显
+            req->output_len = rt_snprintf(req->output, sizeof(req->output),
+                                          "Echo: %.*s", req->input_len, req->input);
+
+            // 通知 UART 线程可以发送了
+            if (req->sem)
+            {
+                rt_sem_release(req->sem);
+            }
+        }
+    }
+}
+
+int data_comm_init(void)
+{
+    proc_mq = rt_mq_create("proc_mq", sizeof(struct proc_request*), 5, RT_IPC_FLAG_FIFO);
+    if (proc_mq == RT_NULL)
+    {
+        rt_kprintf("Failed to create message queue!\n");
+        return -1;
+    }
+
+    rt_thread_t tid = rt_thread_create("proc", proc_thread_entry, RT_NULL,
+                                       2048, 20, 10);
+    if (tid != RT_NULL)
+    {
+        rt_thread_startup(tid);
+    }
+
+    return 0;
+}
+//INIT_COMPONENT_EXPORT(data_comm_init);

applications/DATA/DATA_comm.h

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-10-20     Administrator       the first version
+ */
+#ifndef APPLICATIONS_DATA_COMM_H_
+#define APPLICATIONS_DATA_COMM_H_
+
+// 最大输入/输出长度
+#define MAX_INPUT_LEN   512
+#define MAX_OUTPUT_LEN  1024
+
+// 请求结构体
+struct proc_request {
+    char input[MAX_INPUT_LEN];
+    int  input_len;
+    char output[MAX_OUTPUT_LEN];
+    int  output_len;
+    struct rt_semaphore *sem;  // 指向动态分配的信号量
+};
+
+// 消息队列（供外部使用）
+extern rt_mq_t proc_mq;
+
+int data_comm_init(void);
+
+#endif /* APPLICATIONS_DATA_COMM_H_ */

applications/DATA/DATA_uart.c

@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-10-20     Administrator       the first version
+ */
+/* DATA_uart.c */
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "data_comm.h"
+
+#define SAMPLE_UART_NAME   "uart2"
+#define DMA_RX_BUF_SIZE    512
+#define RINGBUF_SIZE       4096
+
+static rt_device_t serial;
+
+// DMA 接收缓冲区
+static rt_uint8_t dma_rx_buffer[DMA_RX_BUF_SIZE];
+
+// 环形缓冲区（暂存未完整报文）
+static struct rt_ringbuffer rx_rb;
+static rt_uint8_t rb_pool[RINGBUF_SIZE];
+
+// 接收回调信号量
+static struct rt_semaphore rx_sem;
+
+// 函数声明
+static rt_err_t uart_rx_ind(rt_device_t dev, rt_size_t size);
+static int get_line(char *buf, int maxlen);
+
+void uart_thread_entry(void *parameter)
+{
+    char input[MAX_INPUT_LEN];
+    int len;
+
+    // 初始化环形缓冲区和信号量
+    rt_ringbuffer_init(&rx_rb, rb_pool, sizeof(rb_pool));
+    rt_sem_init(&rx_sem, "rx_sem", 0, RT_IPC_FLAG_FIFO);
+
+    // 查找串口设备
+    serial = rt_device_find(SAMPLE_UART_NAME);
+    if (!serial) {
+        rt_kprintf("Cannot find %s\n", SAMPLE_UART_NAME);
+        return;
+    }
+
+    // 配置串口参数（只设置 bufsz，去掉 dma_rx）
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+    config.bufsz = DMA_RX_BUF_SIZE;  // 设置接收缓冲区大小
+
+    rt_device_control(serial, RT_DEVICE_CTRL_CONFIG, &config);
+
+    // 打开设备：关键！使用 RT_DEVICE_FLAG_DMA_RX 启用 DMA 接收
+    rt_err_t result = rt_device_open(serial, RT_DEVICE_FLAG_DMA_RX | RT_DEVICE_FLAG_DMA_TX);
+    if (result != RT_EOK)
+    {
+        rt_kprintf("Failed to open %s with DMA, error=%d\n", SAMPLE_UART_NAME, result);
+        return;
+    }
+
+    // 设置接收指示回调（DMA 完成或中断后调用）
+    rt_device_set_rx_indicate(serial, uart_rx_ind);
+
+    rt_kprintf("UART DMA thread running...\n");
+
+    while (1)
+    {
+        // 等待数据就绪
+        if (rt_sem_take(&rx_sem, RT_WAITING_FOREVER) == RT_EOK)
+        {
+            // 处理接收到的数据（提取完整行）
+            while ((len = get_line(input, sizeof(input))) > 0)
+            {
+                rt_kprintf("Received: %.*s\n", len, input);
+
+                // 动态分配请求结构体（见之前完整代码）
+                struct proc_request *req = rt_malloc(sizeof(struct proc_request));
+                if (!req) continue;
+
+                rt_strncpy(req->input, input, sizeof(req->input));
+                req->input_len = len;
+
+                req->sem = rt_malloc(sizeof(struct rt_semaphore));
+                if (!req->sem) {
+                    rt_free(req);
+                    continue;
+                }
+                rt_sem_init(req->sem, "uart_resp", 0, RT_IPC_FLAG_FIFO);
+
+                // 发送到处理线程
+                if (rt_mq_send(proc_mq, &req, sizeof(req)) == RT_EOK)
+                {
+                    // 等待处理完成
+                    if (rt_sem_take(req->sem, RT_WAITING_FOREVER) == RT_EOK)
+                    {
+                        rt_device_write(serial, 0, req->output, req->output_len);
+                    }
+                }
+
+                // 清理
+                rt_sem_detach(req->sem);  // 或 rt_sem_delete
+                rt_free(req->sem);
+                rt_free(req);
+            }
+        }
+    }
+}
+// DMA 接收回调
+static rt_err_t uart_rx_ind(rt_device_t dev, rt_size_t size)
+{
+    rt_ringbuffer_put(&rx_rb, (const rt_uint8_t*)dma_rx_buffer, size);
+    rt_sem_release(&rx_sem);  // 通知线程处理
+    return RT_EOK;
+}
+
+// 从环形缓冲区提取一行
+static int get_line(char *buf, int maxlen)
+{
+    int i = 0;
+    char ch;
+
+    while (rt_ringbuffer_getchar(&rx_rb, &ch) == 1)
+    {
+        if (ch == '\n' || ch == '\r') {
+            if (i > 0) break;
+            continue;
+        }
+        if (i < maxlen - 1) buf[i++] = ch;
+    }
+    buf[i] = '\0';
+    return i > 0 ? i : 0;
+}
+
+// 启动 UART 线程
+int start_uart_thread(void)
+{
+    rt_thread_t tid = rt_thread_create("uart_rx", uart_thread_entry, RT_NULL,
+                                       4096,      // 栈大小：4KB
+                                       25,        // 优先级
+                                       10);       // 时间片
+    if (tid != RT_NULL)
+    {
+        rt_thread_startup(tid);
+    }
+    return 0;
+}
+//INIT_COMPONENT_EXPORT(start_uart_thread);

applications/DATA/DATA_uart.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-10-20     Administrator       the first version
+ */
+#ifndef APPLICATIONS_DATA_UART_H_
+#define APPLICATIONS_DATA_UART_H_
+
+int start_uart_thread(void);
+
+#endif /* APPLICATIONS_DATA_UART_H_ */

applications/DBSQL/DB_SQLite.c

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-10-20     Administrator       the first version
+ */
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <board.h>
+#include "DB_SQLite.h"
+
+#include <dbhelper.h>
+#define DB_NAME "/rt.db"
+
+void db_sqlite(void *parameter)
+{
+       int db_HelperInit;
+       int db_;
+
+       db_HelperInit = db_helper_init();
+
+       if(db_HelperInit =RT_EOK){
+           rt_kprintf("HelperInit database\n");
+       }else {
+          // db_ = db_create_database("CREATE TABLE student(id INTEGER PRIMARY KEY AUTOINCREMENT,name varchar(32) NOT NULL,score INT NOT NULL);");
+        //   if(db_=0){rt_kprintf("database ok\n");}else{rt_kprintf("database no\n");}
+        }
+
+    /*   int fd = 0;
+         const char *dbname = db_get_name();
+         fd = open(dbname, O_RDONLY);
+         if (fd > 0)
+             rt_kprintf("%s exist\r\n", dbname);
+         else
+             rt_kprintf("%s not exist\r\n");
+
+
+         const char *sql = "CREATE TABLE IF NOT EXISTS student(id INTEGER PRIMARY KEY AUTOINCREMENT,name varchar(32) NOT NULL,score INT NOT NULL);";
+         rt_kprintf("sql cmd: %s\r\n\r\n", sql);
+         int ret = db_create_database(sql);
+         rt_kprintf("sql ret: %d\r\n", ret);*/
+
+      // sqlite3_os_init();
+
+     /*  int rc = db_connect("/rt.db");
+         if (rc <0) {
+             const char *sql = "CREATE TABLE student(id INTEGER PRIMARY KEY AUTOINCREMENT,name varchar(32) NOT NULL,score INT NOT NULL);";
+             int db_create_database(sql);
+         }*/
+}
+
+/* 线程 */
+void thread_DB_SQLite(void)
+{
+    /* 初始化线程 1，名称是 thread1，入口是 thread1_entry*/
+    rt_thread_t tid;
+    tid = rt_thread_create("db_sqlite", db_sqlite, RT_NULL, 1024*32, 3, 10);
+
+    if (tid != RT_NULL)
+    {
+        rt_thread_startup(tid);
+    }
+    else
+    {
+        rt_kprintf("Failed to create sqlite_sys thread!\n");
+    }
+   // return 0;
+}

applications/DBSQL/DB_SQLite.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-10-20     Administrator       the first version
+ */
+#ifndef APPLICATIONS_DB_DB_SQLITE_H_
+#define APPLICATIONS_DB_SQLITE_SYS_H_
+
+void thread_DB_SQLite(void);
+
+#endif /* APPLICATIONS_DB_DB_SQLITE_H_ */

applications/RUN_LED/RUN_LED.c

@@ -2,6 +2,7 @@
 #include <rtdevice.h>
 #include <board.h>
 #include"drv_common.h"
+#include "RUN_LED.h"
 
 #define LED_PIN GET_PIN(C,13)
 
@@ -18,12 +19,12 @@ void RUN_LED(void *parameter)
     }
 }
 
-/* 线程示例 */
+/* 线程 */
 void thread_RUN_LED(void)
 {
     /* 初始化线程 1，名称是 thread1，入口是 thread1_entry*/
     rt_thread_t tid;
-    tid = rt_thread_create("run_led", RUN_LED, RT_NULL, 512, 3, 10);
+    tid = rt_thread_create("run_led", RUN_LED, RT_NULL, 256, 3, 10);
 
     if (tid != RT_NULL)
     {

applications/main.c

@@ -1,4 +1,6 @@
 /*
+#include <DBSQL/DB_SQLite.h>
+#include <DB_SQLite.h>
  * Copyright (c) 2006-2025, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
@@ -12,61 +14,23 @@
 #include "dfs_fs.h"
 #include <rtdbg.h>
 #include "RUN_LED.h"
-
+#include "DB_SQLite.h"
-#include <dbhelper.h>
-#define DB_NAME "/rt.db"
 
 #define DBG_TAG "main"
 #define DBG_LVL DBG_LOG
-#include <rtdbg.h>
-
 
+extern rt_sem_t mount_sem;  // 引用上面SD挂载线程定义的信号量
 
 int main(void)
 {
-    rt_thread_mdelay(100);      //等待sd_mount线程挂载文件系统，可使用IPC信号量完成同步，提高实时性
+    rt_sem_take(mount_sem, rt_tick_from_millisecond(5000)); // 等待挂载完成，最多等待 5 秒
-
+    thread_RUN_LED();//运行指示灯线程
-    thread_RUN_LED();
+    thread_DB_SQLite();
-
-    //int db_HelperInit;
-  //  db_HelperInit = db_helper_init();
-
-   // if(db_HelperInit =RT_EOK){
-      //  rt_kprintf("HelperInit database\n");
-  //  }
-
-
-
-
-
-
-
-
-    //  int db_helper_init();
-
-  //  sqlite3 *db;
-  //  int8_t rc;
-
-   // rc = sqlite3_open("rt.db", &db);
-   // if (rc != SQLITE_OK)
-    //    {
-            //rt_kprintf("Cannot open database: %s\n", sqlite3_errmsg(db));
-            //return -1;
-   //     }else{
-  //  rt_kprintf("Database opened successfully\n");
-     //  sqlite3_close(db);
-  //      }
-  //  sqlite3_os_init();
-  //if(int sqlite3_os_init()==RT_EOK){LOG_D("Sqlite int RT_EOK!");}
 
+    start_uart_thread();
+    data_comm_init();
 
-   // sqlite3_os_init();
 
-  /*  int rc = db_connect("/rt.db");
-      if (rc <0) {
-          const char *sql = "CREATE TABLE student(id INTEGER PRIMARY KEY AUTOINCREMENT,name varchar(32) NOT NULL,score INT NOT NULL);";
-          int db_create_database(sql);
-      }*/
 
     return RT_EOK;
 }

applications/mount_sdio_elmfatfs.c

@@ -15,25 +15,39 @@
 #define DBG_LVL DBG_LOG
 #include <rtdbg.h>
 
-
+rt_sem_t mount_sem = RT_NULL;
 
 void sd_mount(void *parameter)
 {
-    while (1)
+    LOG_I("SD mount thread started, waiting for SD card...");
+    int retry = 0;
+       while (retry<10)
        {
-
            if (rt_device_find("sd0") != RT_NULL)
            {
                if (dfs_mount("sd0", "/", "elm", 0, 0) == RT_EOK)
                {
-                LOG_I("sd card mount to '/fatfs'");
+                   LOG_I("SD card mounted to '/' successfully");
-                break;
+                   // 挂载成功，释放信号量
+                   if (mount_sem != RT_NULL)
+                   {
+                       rt_sem_release(mount_sem);
+                   }
+                   break; // 退出线程循环
                }
                else
                {
-                LOG_W("sd card mount to '/fatfs' failed!");
+                   LOG_W("SD card mount failed, retrying...");
                }
            }
+           else
+           {
+               LOG_D("SD device 'sd0' not found, retrying...");
+           }
+
+           // 避免空转，延时 100ms 再试
+           rt_thread_mdelay(500);
+           retry++;
        }
 }
 
@@ -41,16 +55,41 @@ int stm32_sdcard_mount(void)
 {
     rt_thread_t tid;
 
-    tid = rt_thread_create("sd_mount", sd_mount, RT_NULL,
+      // 删除旧的信号量（如果存在）
-                           1024*4, RT_THREAD_PRIORITY_MAX - 2, 20);
+      if (mount_sem != RT_NULL)
+      {
+          rt_sem_delete(mount_sem);
+      }
+
+      // 创建计数信号量，初始值为 0
+      mount_sem = rt_sem_create("sd_mount", 0, RT_IPC_FLAG_FIFO);
+      if (mount_sem == RT_NULL)
+      {
+          LOG_E("Failed to create semaphore for SD mount!");
+          return -RT_ENOMEM;
+      }
+
+      tid = rt_thread_create("sd_mount",
+                             sd_mount,
+                             RT_NULL,
+                             4096,  // 建议增大栈，避免溢出
+                             RT_THREAD_PRIORITY_MAX - 2,
+                             20);
       if (tid != RT_NULL)
       {
           rt_thread_startup(tid);
+          LOG_I("SD mount thread created and started");
       }
       else
       {
-        LOG_E("create sd_mount thread err!");
+          LOG_E("Failed to create SD mount thread!");
+          rt_sem_delete(mount_sem);
+          mount_sem = RT_NULL;
+          return -RT_ERROR;
       }
+
       return RT_EOK;
 }
+// 使用 INIT_COMPONENTS_INIT 或 INIT_APP_EXPORT 自动启动
+//INIT_COMPONENTS_INIT(stm32_sdcard_mount);  // 在组件初始化阶段运行
 INIT_APP_EXPORT(stm32_sdcard_mount);

drivers/board.h

@@ -71,6 +71,11 @@ extern "C"
 #define BSP_UART1_TX_PIN       "PA9"
 #define BSP_UART1_RX_PIN       "PA10"
 
+#define BSP_USING_UART2
+#define BSP_UART2_TX_PIN       "PA2"
+#define BSP_UART2_RX_PIN       "PA3"
+#define BSP_UART2_TX_USING_DMA
+#define BSP_UART2_RX_USING_DMA
 /*-------------------------- UART CONFIG END --------------------------*/
 
 /*-------------------------- I2C CONFIG BEGIN --------------------------*/

rtconfig.h

@@ -106,6 +106,7 @@
 #define RT_USING_DEVICE_IPC
 #define RT_USING_SERIAL
 #define RT_USING_SERIAL_V1
+#define RT_SERIAL_USING_DMA
 #define RT_SERIAL_RB_BUFSZ 64
 #define RT_USING_PIN
 #define RT_USING_SDIO