diff --git "a/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\344\272\224\345\244\251\344\275\234\344\270\232/Kconfig" "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\344\272\224\345\244\251\344\275\234\344\270\232/Kconfig"
new file mode 100644
index 0000000000000000000000000000000000000000..39e3a48642cc7b06208f60a5be81c222c54efe95
--- /dev/null
+++ "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\344\272\224\345\244\251\344\275\234\344\270\232/Kconfig"
@@ -0,0 +1,13 @@
+menuconfig MQTT_JSON_CONFIG
+    bool "Enable MQTT JSON Configuration"
+    default y
+
+if MQTT_JSON_CONFIG
+    config MQTT_JSON_NAME
+        string "Name in JSON message"
+        default "xiaoming"
+
+    config MQTT_JSON_STUDY
+        string "Study message in JSON"
+        default "Keep up the good work!"
+endif
\ No newline at end of file
diff --git "a/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\344\272\224\345\244\251\344\275\234\344\270\232/test.c" "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\344\272\224\345\244\251\344\275\234\344\270\232/test.c"
new file mode 100644
index 0000000000000000000000000000000000000000..a454a526cc7c486b2abde61cbb18b4077767b1e6
--- /dev/null
+++ "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\344\272\224\345\244\251\344\275\234\344\270\232/test.c"
@@ -0,0 +1,204 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <board.h>
+#include "mqttclient.h"
+#include <cJSON.h>
+
+/* MQTT Configuration */
+#ifndef KAWAII_MQTT_HOST
+#define KAWAII_MQTT_HOST               "jiejie01.top"
+#endif
+#ifndef KAWAII_MQTT_PORT
+#define KAWAII_MQTT_PORT               "1883"
+#endif
+#ifndef KAWAII_MQTT_CLIENTID
+#define KAWAII_MQTT_CLIENTID           "rtthread1209"
+#endif
+#ifndef KAWAII_MQTT_USERNAME
+#define KAWAII_MQTT_USERNAME           "rt-thread"
+#endif
+#ifndef KAWAII_MQTT_PASSWORD
+#define KAWAII_MQTT_PASSWORD           "rt-thread"
+#endif
+#ifndef KAWAII_MQTT_SUBTOPIC
+#define KAWAII_MQTT_SUBTOPIC           "rtt-sub"
+#endif
+#ifndef KAWAII_MQTT_PUBTOPIC
+#define KAWAII_MQTT_PUBTOPIC           "rtt-pub"
+#endif
+
+#ifndef MQTT_JSON_NAME
+#define MQTT_JSON_NAME                 "xiaoming"
+#endif
+#ifndef MQTT_JSON_STUDY
+#define MQTT_JSON_STUDY                "Keep up the good work!"
+#endif
+
+static mqtt_client_t *mqtt_client = NULL;
+
+/* 创建JSON消息 */
+static char* create_json_message(void)
+{
+    cJSON *root = cJSON_CreateObject();
+    if (root == NULL) {
+        KAWAII_MQTT_LOG_E("Failed to create JSON object");
+        return NULL;
+    }
+    
+    cJSON_AddStringToObject(root, "name", MQTT_JSON_NAME);
+    cJSON_AddStringToObject(root, "study", MQTT_JSON_STUDY);
+    
+    char *json_string = cJSON_PrintUnformatted(root);
+    cJSON_Delete(root);
+    
+    if (json_string == NULL) {
+        KAWAII_MQTT_LOG_E("Failed to print JSON");
+    }
+    
+    return json_string;
+}
+
+/* 订阅消息处理回调 */
+static void mqtt_message_handler(void* client, message_data_t* msg)
+{
+    (void)client;
+    char *payload = (char*)msg->message->payload;
+    
+    KAWAII_MQTT_LOG_I("\n--- Received Message ---");
+    KAWAII_MQTT_LOG_I("Topic: %s", msg->topic_name);
+    KAWAII_MQTT_LOG_I("Payload: %s", payload);
+    
+    /* 解析JSON消息 */
+    cJSON *root = cJSON_Parse(payload);
+    if (root == NULL) {
+        KAWAII_MQTT_LOG_E("Invalid JSON format");
+        return;
+    }
+    
+    /* 检查字段是否存在 */
+    cJSON *name = cJSON_GetObjectItem(root, "name");
+    cJSON *study = cJSON_GetObjectItem(root, "study");
+    
+    if (cJSON_IsString(name) && cJSON_IsString(study)) {
+        KAWAII_MQTT_LOG_I("Parsed JSON - name: %s, study: %s", 
+                         name->valuestring, study->valuestring);
+        
+        /* 验证消息内容 */
+        if (strcmp(name->valuestring, MQTT_JSON_NAME) == 0 &&
+            strcmp(study->valuestring, MQTT_JSON_STUDY) == 0) {
+            
+            /* 构造回复消息 */
+            mqtt_message_t reply_msg;
+            memset(&reply_msg, 0, sizeof(reply_msg));
+            reply_msg.qos = QOS0;
+            reply_msg.payload = "辛苦了，下周的比赛加油！";
+            
+            /* 发布回复 */
+            if (mqtt_publish(mqtt_client, KAWAII_MQTT_PUBTOPIC, &reply_msg) == 0) {
+                KAWAII_MQTT_LOG_I("Sent response: %s", (char*)reply_msg.payload);
+            } else {
+                KAWAII_MQTT_LOG_E("Failed to send response");
+            }
+        }
+    } else {
+        KAWAII_MQTT_LOG_E("Missing required JSON fields");
+    }
+    
+    cJSON_Delete(root);
+    KAWAII_MQTT_LOG_I("-----------------------\n");
+}
+
+/* MQTT客户端初始化 */
+static int mqtt_client_init(void)
+{
+    mqtt_client = mqtt_lease();
+    if (mqtt_client == NULL) {
+        KAWAII_MQTT_LOG_E("Failed to create MQTT client");
+        return -1;
+    }
+
+    /* 设置MQTT参数 */
+    mqtt_set_host(mqtt_client, KAWAII_MQTT_HOST);
+    mqtt_set_port(mqtt_client, KAWAII_MQTT_PORT);
+    mqtt_set_client_id(mqtt_client, KAWAII_MQTT_CLIENTID);
+    mqtt_set_user_name(mqtt_client, KAWAII_MQTT_USERNAME);
+    mqtt_set_password(mqtt_client, KAWAII_MQTT_PASSWORD);
+    mqtt_set_clean_session(mqtt_client, 1);
+
+    /* 连接服务器 */
+    if (mqtt_connect(mqtt_client) != 0) {
+        KAWAII_MQTT_LOG_E("MQTT connect failed");
+        return -1;
+    }
+
+    /* 订阅主题 */
+    if (mqtt_subscribe(mqtt_client, KAWAII_MQTT_SUBTOPIC, QOS0, mqtt_message_handler) != 0) {
+        KAWAII_MQTT_LOG_E("Subscribe failed");
+        return -1;
+    }
+
+    KAWAII_MQTT_LOG_I("MQTT client initialized successfully");
+    KAWAII_MQTT_LOG_I("Client ID: %s", KAWAII_MQTT_CLIENTID);
+    KAWAII_MQTT_LOG_I("Subscribed to: %s", KAWAII_MQTT_SUBTOPIC);
+    KAWAII_MQTT_LOG_I("Publish to: %s", KAWAII_MQTT_PUBTOPIC);
+    
+    return 0;
+}
+
+static void send_test_message(void)
+{
+    char *json_msg = create_json_message();
+    if (json_msg == NULL) {
+        return;
+    }
+
+    mqtt_message_t msg;
+    memset(&msg, 0, sizeof(msg));
+    msg.qos = QOS0;
+    msg.payload = json_msg;
+
+    KAWAII_MQTT_LOG_I("Sending test message: %s", json_msg);
+    mqtt_publish(mqtt_client, KAWAII_MQTT_SUBTOPIC, &msg);
+    
+    cJSON_free(json_msg);
+}
+
+/* MQTT主线程 */
+static void mqtt_thread_entry(void *parameter)
+{
+    rt_thread_mdelay(5000);  
+    
+    mqtt_log_init();
+
+    if (mqtt_client_init() != 0) {
+        KAWAII_MQTT_LOG_E("MQTT initialization failed");
+        return;
+    }
+
+    send_test_message();
+
+    while (1) {
+        rt_thread_mdelay(1000);
+    }
+}
+
+int ka_mqtt(void)
+{
+    rt_thread_t tid = rt_thread_create("mqtt_demo",
+                                     mqtt_thread_entry,
+                                     RT_NULL,
+                                     4096,
+                                     15,
+                                     10);
+    if (tid != RT_NULL) {
+        rt_thread_startup(tid);
+        return RT_EOK;
+    }
+    
+    return -RT_ERROR;
+}
+
+MSH_CMD_EXPORT(ka_mqtt, Kawaii MQTT client with JSON support);
\ No newline at end of file
diff --git "a/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/drv_vir_led.c" "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/drv_vir_led.c"
new file mode 100644
index 0000000000000000000000000000000000000000..52926b411a9ec248f439f62a5159c7cdba7c698d
--- /dev/null
+++ "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/drv_vir_led.c"
@@ -0,0 +1,113 @@
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "vir_led.h"
+
+// 设备初始化
+static rt_err_t _vir_led_init(rt_device_t dev)
+{
+    rt_kprintf("Virtual LED device initialized\n");
+    return RT_EOK;
+}
+
+// 设备打开
+static rt_err_t _vir_led_open(rt_device_t dev, rt_uint16_t oflag)
+{
+    rt_kprintf("Virtual LED device opened\n");
+    return RT_EOK;
+}
+
+// 设备关闭
+static rt_err_t _vir_led_close(rt_device_t dev)
+{
+    rt_kprintf("Virtual LED device closed\n");
+    return RT_EOK;
+}
+
+// 设备读操作（读取LED状态）
+static rt_size_t _vir_led_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
+{
+    rt_vir_led_device_t led = (rt_vir_led_device_t)dev;
+    if (led->ops->get_state && buffer != RT_NULL && size >= sizeof(rt_led_state_t))
+    {
+        led->ops->get_state(dev, (rt_led_state_t*)buffer);
+        return sizeof(rt_led_state_t);
+    }
+    return -RT_ERROR;
+}
+
+// 设备写操作（设置LED状态）
+static rt_size_t _vir_led_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
+{
+    rt_vir_led_device_t led = (rt_vir_led_device_t)dev;
+    if (led->ops->set_state && buffer != RT_NULL && size >= sizeof(rt_led_state_t))
+    {
+        led->ops->set_state(dev, *(rt_led_state_t*)buffer);
+        return sizeof(rt_led_state_t);
+    }
+    return -RT_ERROR;
+}
+
+// 设备控制
+static rt_err_t _vir_led_control(rt_device_t dev, int cmd, void *args)
+{
+    rt_vir_led_device_t led = (rt_vir_led_device_t)dev;
+    if (cmd == 1 && led->ops->set_blink)  
+    {
+        rt_uint32_t *interval = (rt_uint32_t*)args;
+        led->ops->set_blink(dev, *interval);
+        return RT_EOK;
+    }
+    rt_kprintf("Unsupported control command: %d\n", cmd);
+    return -RT_ERROR;
+}
+
+// LED注册函数
+rt_err_t rt_hw_vir_led_register(rt_vir_led_device_t device, const char *name,
+                              const struct rt_vir_led_ops *ops, const void *user_data)
+{
+    RT_ASSERT(device != RT_NULL && ops != RT_NULL);
+    rt_err_t result;
+
+    device->ops = ops;
+    device->parent.init    = _vir_led_init;
+    device->parent.open    = _vir_led_open;
+    device->parent.close   = _vir_led_close;
+    device->parent.read    = _vir_led_read;
+    device->parent.write   = _vir_led_write;
+    device->parent.control = _vir_led_control;
+    result = rt_device_register(&device->parent, name, RT_DEVICE_FLAG_RDWR);
+    return result;
+}
+
+rt_err_t rt_vir_led_set_state(rt_vir_led_device_t device, rt_led_state_t state)
+{
+    RT_ASSERT(device != RT_NULL && device->ops != RT_NULL);
+    if (device->ops->set_state)
+    {
+        device->ops->set_state((rt_device_t)device, state);
+        return RT_EOK;
+    }
+    return -RT_ERROR;
+}
+
+rt_err_t rt_vir_led_get_state(rt_vir_led_device_t device, rt_led_state_t *state)
+{
+    RT_ASSERT(device != RT_NULL && device->ops != RT_NULL && state != RT_NULL);
+    if (device->ops->get_state)
+    {
+        device->ops->get_state((rt_device_t)device, state);
+        return RT_EOK;
+    }
+    return -RT_ERROR;
+}
+
+rt_err_t rt_vir_led_set_blink(rt_vir_led_device_t device, rt_uint32_t interval)
+{
+    RT_ASSERT(device != RT_NULL && device->ops != RT_NULL);
+    if (device->ops->set_blink)
+    {
+        device->ops->set_blink((rt_device_t)device, interval);
+        return RT_EOK;
+    }
+    return -RT_ERROR;
+}
\ No newline at end of file
diff --git "a/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/drv_vir_led.h" "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/drv_vir_led.h"
new file mode 100644
index 0000000000000000000000000000000000000000..4618e330d4ab4de07dfdeb8ac2a0f780d771e0da
--- /dev/null
+++ "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/drv_vir_led.h"
@@ -0,0 +1,14 @@
+#ifndef __DRV_VIR_LED_H__
+#define __DRV_VIR_LED_H__
+
+#include <rtthread.h>
+#include "vir_led.h"
+
+struct vir_led_dev {
+    struct rt_vir_led_device parent;  
+    rt_led_state_t state;             // LED当前状态
+    rt_uint32_t blink_interval;       // 闪烁间隔(ms)
+    char *info;                       // 设备描述信息
+};
+
+#endif
\ No newline at end of file
diff --git "a/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/drv_vir_led_dev.c" "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/drv_vir_led_dev.c"
new file mode 100644
index 0000000000000000000000000000000000000000..b197062a2f53b8768b21f019da0b9113a6a7a4ee
--- /dev/null
+++ "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/drv_vir_led_dev.c"
@@ -0,0 +1,61 @@
+#include <rtthread.h>
+#include "drv_vir_led.h"
+
+// 定义LED设备实例
+struct vir_led_dev vir_led;
+
+// 设置LED状态
+void vir_led_set_state(struct rt_device *device, rt_led_state_t state)
+{
+    struct vir_led_dev *led = (struct vir_led_dev *)device;
+    led->state = state;
+    switch(state)
+    {
+        case LED_OFF:
+            rt_kprintf("Virtual LED turned OFF\n");
+            break;
+        case LED_ON:
+            rt_kprintf("Virtual LED turned ON\n");
+            break;
+        case LED_BLINK:
+            rt_kprintf("Virtual LED started blinking\n");
+            break;
+    }
+}
+
+// 获取LED状态
+void vir_led_get_state(struct rt_device *device, rt_led_state_t *state)
+{
+    struct vir_led_dev *led = (struct vir_led_dev *)device;
+    *state = led->state;
+}
+
+// 设置闪烁间隔
+void vir_led_set_blink(struct rt_device *device, rt_uint32_t interval)
+{
+    struct vir_led_dev *led = (struct vir_led_dev *)device;
+    led->blink_interval = interval;
+    rt_kprintf("Virtual LED blink interval set to %dms\n", interval);
+}
+
+// LED操作函数集
+static struct rt_vir_led_ops vir_led_ops = {
+    vir_led_set_state,
+    vir_led_get_state,
+    vir_led_set_blink,
+};
+
+// LED初始化
+static int rt_hw_vir_led_init(void)
+{
+    // 初始化设备数据
+    vir_led.state = LED_OFF;
+    vir_led.blink_interval = 500;
+    vir_led.info = "Virtual LED Device (GPIO Emulated)";
+
+
+    rt_hw_vir_led_register(&vir_led.parent, "vir_led", &vir_led_ops, (void*)vir_led.info);
+    return RT_EOK;
+}
+
+INIT_DEVICE_EXPORT(rt_hw_vir_led_init);
diff --git "a/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/vir_led.h" "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/vir_led.h"
new file mode 100644
index 0000000000000000000000000000000000000000..548f15141b8087acad310091a4a78e2d7a23c8fa
--- /dev/null
+++ "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/vir_led.h"
@@ -0,0 +1,35 @@
+#ifndef __VIR_LED_H__
+#define __VIR_LED_H__
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+// LED状态枚举
+typedef enum {
+    LED_OFF = 0,
+    LED_ON  = 1,
+    LED_BLINK
+} rt_led_state_t;
+
+// 虚拟LED操作函数集
+struct rt_vir_led_ops {
+    void (*set_state)(struct rt_device *device, rt_led_state_t state);  // 设置LED状态
+    void (*get_state)(struct rt_device *device, rt_led_state_t *state); // 获取LED状态
+    void (*set_blink)(struct rt_device *device, rt_uint32_t interval);  // 设置闪烁间隔(ms)
+};
+
+// 虚拟LED设备基类
+struct rt_vir_led_device {
+    struct rt_device parent;                     
+    const struct rt_vir_led_ops *ops;           
+};
+typedef struct rt_vir_led_device *rt_vir_led_device_t;
+
+// 注册及操作函数声明
+rt_err_t rt_hw_vir_led_register(rt_vir_led_device_t device, const char *name,
+                              const struct rt_vir_led_ops *ops, const void *user_data);
+rt_err_t rt_vir_led_set_state(rt_vir_led_device_t device, rt_led_state_t state);
+rt_err_t rt_vir_led_get_state(rt_vir_led_device_t device, rt_led_state_t *state);
+rt_err_t rt_vir_led_set_blink(rt_vir_led_device_t device, rt_uint32_t interval);
+
+#endif
\ No newline at end of file
diff --git "a/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/vir_led_test.c" "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/vir_led_test.c"
new file mode 100644
index 0000000000000000000000000000000000000000..42781efc2dc435468b418700bbca4fd0099aa0d4
--- /dev/null
+++ "b/2025/\347\254\2545\347\273\204(CanMV-K230)/\345\221\250\351\224\266\347\220\252/\344\275\234\344\270\232/\347\254\254\345\233\233\345\244\251\344\275\234\344\270\232/vir_led_test.c"
@@ -0,0 +1,54 @@
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "vir_led.h"
+#include "drv_vir_led.h"
+
+int vir_led_test(void)
+{
+    rt_device_t led_dev;
+    rt_led_state_t state;
+    rt_size_t ret;
+    rt_uint32_t blink_interval = 1000;  // 1秒闪烁间隔
+
+    // 查找设备
+    led_dev = rt_device_find("vir_led");
+    if (led_dev == RT_NULL)
+    {
+        rt_kprintf("Find virtual LED device failed!\n");
+        return -RT_ERROR;
+    }
+
+    // 打开设备
+    if (rt_device_open(led_dev, RT_DEVICE_FLAG_RDWR) != RT_EOK)
+    {
+        rt_kprintf("Open virtual LED device failed!\n");
+        return -RT_ERROR;
+    }
+
+    // 设置为点亮
+    state = LED_ON;
+    ret = rt_device_write(led_dev, 0, &state, sizeof(state));
+    if (ret != sizeof(state))
+        rt_kprintf("Write LED state failed!\n");
+
+    // 读取当前状态
+    ret = rt_device_read(led_dev, 0, &state, sizeof(state));
+    if (ret == sizeof(state))
+        rt_kprintf("Device read state: %d (0=OFF,1=ON,2=BLINK)\n", state);
+
+    //设置为闪烁
+    rt_vir_led_set_state((rt_vir_led_device_t)led_dev, LED_BLINK);
+    rt_vir_led_set_blink((rt_vir_led_device_t)led_dev, blink_interval);
+
+    // 修改闪烁间隔
+    rt_device_control(led_dev, 1, &blink_interval);  
+
+    // 获取当前状态
+    rt_vir_led_get_state((rt_vir_led_device_t)led_dev, &state);
+    rt_kprintf("Special API read state: %d\n", state);
+
+    // 关闭设备
+    rt_device_close(led_dev);
+    return RT_EOK;
+}
+MSH_CMD_EXPORT(vir_led_test, Virtual LED test command); 
\ No newline at end of file
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@@ -0,0 +1,415 @@
+# 【RSOC25】Day 4课程笔记：设备驱动
+## IO设备框架的概念
+### RT-Thread I/O框架
+![image](images/day4/1.png)
+### RT-Thread支持的I/O设备类型
+![image](images/day4/2.png)
+### 字符/块设备特点
+![image](images/day4/3.png)
+### 为什么要对设备分类
+- MSH可以重定向到意的字符设备上，例如将lcd模拟成字符设备，就可以将打印输出到LCD上，或者是实现一套空字符设备，将msh重定向到这里。
+- Fatfs 文件系统依赖块设备驱动，我们将SD卡读写实现成块设备，但是也可以用ram来模拟块设备驱动，
+- 不同的组件和应用会依赖不同的设备，对设备进行分类，可以做到对一类设备同样的控制。
+## I/O API
+### 创建/销毁设备
+```
+rt device trt device create(int type, int attach size);
+void rt device destroy(rt device t device);
+```
+![image](images/day4/4.png)
+###  注册/注销设备
+```
+*rt err trt device register(rt device t dev, const charname,rt uint8 t flags);
+*rt err trt device unregister(rt device t dev);
+```
+![image](images/day4/5.png)
+### 查找设备/初始化设备
+```
+rt device trt device find(const char* name)
+rt err trt device init(rt device t dev);
+```
+![image](images/day4/9.png)
+### 打开/关闭设备
+```
+rt err trt device open(rt device tdev,rt uint16 toflags);
+rt err trt device close(rt device t dev);
+```
+![image](images/day4/10.png)
+### 打开标志位
+![image](images/day4/11.png)
+### 控制设备
+```
+rt err trt device control(rt device t dev,rt uint8 tcmd, void* arg); 
+```
+![image](images/day4/12.png)
+### 读写设备
+```
+rt size trt device read(rt device t dev,rt off t pos,void* bufferrt size t size);
+rt size trt device write(rt device t dev, rt off t pos,const void*buffer, rt size t size);
+```
+![image](images/day4/13.png)
+### 数据接收回调
+当硬件设备收到数据时，可以通过如下函数回调另一个函数来设置数据接收指示，通知上层应用线程有数据到达:
+```
+rt err trt device set rx indicate(rt device t dev,rt err t(*rx ind)(rt device tdev,rt size t size));
+```
+![image](images/day4/14.png)  
+在应用程序调用rt device write()入数据时，如果底层硬件能够支持自动发送，那么上层应用可以设置一个回调函数。这个回调函数会在底层硬件数据发送完成后(例如DMA传送完成或 FIFO已经写入完毕产生完成中断时)调用。可以通过如下函数设置设备发送完成指示，函数参数及返回值见:
+```
+rt err trt device set tx complete(rt device t dev, rt err t(*tx done)(rt device t dev,void *buffer));
+```
+### I/O框架调用关系图
+![image](images/day4/15.png)
+## 实验1：注册字符设备test
+参考：
+```
+rt device trt device create(int type, int attach size);
+void rt _device_destroy(rt _device_t device);
+rt err trt_device_register(rt device t dev, const char* name.rt _uint8_t flags);
+rt err trt device unregister(rt device t dev);
+```
+### 创建一个dev_test.c文件
+![image](images/day4/6.png)
+### 在dev_test中写代码
+```
+#include <rtthread.h>
+#include <rtdevice.h>
+
+static int rt_dev_test_init(void)
+{
+    rt_device_t dev_test = rt_device_create(RT_Device_Class_Char, 0);
+    if(dev_test == RT_NULL)
+    {
+        rt_kprintf("Failed to create test device\n");
+        return -RT_ERROR;
+    }
+
+    if(rt_device_register(dev_test,"test_dev",RT_DEVICE_FLAG_RDWR)!=RT_EOK)
+    {
+        rt_kprintf("Failed to register test device\n");
+        return -RT_ERROR;
+    }
+
+    return RT_EOK;
+}
+
+INIT_DEVICE_EXPORT(rt_dev_test_init);
+```
+### 编译后将代码下载
+![image](images/day4/7.png)
+## 访问I/O设备
+应用程序通过I/O设备管理接口来访问硬件设备，当设备驱动实现后，应用程序就可以访问该硬件。
+![image](images/day4/8.png)
+
+## GPIO开发
+### 概念与原理
+- 芯片上的引脚一般分为4类:电源、时钟、控制与 IO，I/O 口在使用模式上又分为 General Purpose Input Output(通用输入/输出)，简称 GPIO，与功能复用 I/O(如 SPI/I2C/UART 等)
+- 大多数MCU的引脚都不止一个功能。不同引脚内部结构不一样拥有的功能也不一样。可以通过不同的配置，切换引脚的实际功能通用 /O 口主要特性如下:
+- 可编程控制中断:中断触发模式可配置，一般有下图所示5种中断触发模式:
+![image](images/day4/16.png)
+### 常用接口
+应用程序通过 RT-Thread 提供的 PIN设备管理接口来访问GPIO相关接口如下所示:
+- rt pin mode():设置引脚模式
+- rt_pin_write():设置引脚电平
+- rt pin read():读取引脚电平
+- rt pin attach irg():绑定引脚中断回调函数
+- rt pin irg enable():使能引脚中断
+- rt pin detach irg():脱离引脚中断回调函数
+### 应用开发
+#### 配置GPIO引脚模式
+引脚在使用前需要先设置好输入或者输出模式，通过如下函数完成:
+```
+void rt pin mode(rt base_t pin, rt base_t mode);
+```
+mode 可取以下宏定义值之一:
+![image](images/day4/17.png)
+#### 输出高低电平
+设置引脚输出电平的函数如下所示:
+```
+void rt pin write(rt base_t pin, rt base_t value);
+```
+- value 可取2种宏定义值之一:PIN LOW 低电平PIN
+## IIC总线
+### 简介
+![image](images/day4/18.png)
+### 传输格式
+![image](images/day4/19.png)
+### 起始位和结束位
+![image](images/day4/20.png)
+### ACK NACK
+![image](images/day4/21.png)
+### 主机向从机写数据
+![image](images/day4/22.png)
+### 主机向从机读数据
+![image](images/day4/23.png)
+### IIC从机常用模式
+- 向I2C从机设备，某个寄存器写一个字节数据:改变传感器寄存器的值
+- 向I2C从机设备，某个寄存器写多个字节数据:同上
+- 向I2C从机设备，从某个寄存器读取一个字节数据:读取传感器寄存器状态
+- 向I2C从机设备，从某个寄存器读取多个字节数据:读取传感器数据
+### IIC设备探测Package
+勾选使用I2C-tools软件包，方便对i2c设备进行调试
+![image](images/day4/24.png)
+#### 探测总线上的设备：`i2c scan i2c3`
+![image](images/day4/25.png)
+### API操作
+#### 查找设备
+![image](images/day4/26.png)
+#### 传输
+![image](images/day4/27.png)
+### I2C消息数据类型
+![image](images/day4/28.png)
+### 使用思路
+- 查找IIC设备
+- 构造msgs消息
+- 启动transfer传输
+- 处理结果
+### 例程
+#### 写一个字节数据
+```
+#include <rtthread.h>
+#include <rtdevice.h>
+
+void i2c_sample_single_byte_write(void)
+{
+    struct rt_i2c_bus_device *i2c_bus;
+    struct rt_i2c_msg msgs;
+    rt_uint8_t buf[2];
+
+    i2c_bus = (struct rt_i2c_bus_device *)rt_device_find("i2c2");
+    if(i2c_bus == RT_NULL)
+    {
+        rt_kprintf("can't find %s device!\n", "i2c2");
+        return;
+    }
+
+    buf[0] = 0x6B;
+
+    msgs.addr = 0x68;
+    msgs.flags = RT_I2C_WR;
+    msgs.buf = buf;
+    msgs.len = 1;
+
+    if(rt_i2c_transfer(i2c_bus, &msgs, 1) == 1)
+        rt_kprintf("single byte write success!\n");
+    else
+        rt_kprintf("single byte write failed...\n");
+}
+
+MSH_CMD_EXPORT(i2c_sample_single_byte_write, i2c_sample_single_byte_write);
+```
+#### 写多字节数据
+```
+#include <rtthread.h>
+#include <rtdevice.h>
+
+void i2c_sample_multi_byte_write(void)
+{
+    struct rt_i2c_bus_device *i2c_bus;
+    struct rt_i2c_msg msgs;
+    rt_uint8_t buf[3];
+
+    i2c_bus = (struct rt_i2c_bus_device *)rt_device_find("i2c2");
+    if(i2c_bus == RT_NULL)
+    {
+        rt_kprintf("can't find %s device!\n", "i2c2");
+    }
+
+    buf[0] = 0x01;
+    buf[1] = 0x02;
+    buf[2] = 0x03;
+
+    msgs.addr = 0x68;
+    msgs.flags = RT_I2C_WR;
+    msgs.buf = buf;
+    msgs.len = 3;
+
+    if(rt_i2c_transfer(i2c_bus, &msgs, 1) == 1)
+        rt_kprintf("multi byte write success!\n");
+    else
+        rt_kprintf("multi byte write failed...\n");
+}
+
+MSH_CMD_EXPORT(i2c_sample_multi_byte_write, i2c_sample_multi_byte_write);
+```
+#### 读数据
+```
+#include <rtthread.h>
+#include <rtdevice.h>
+
+void i2c_sample_single_byte_read(void)
+{
+    struct rt_i2c_bus_device *i2c_bus;
+    struct rt_i2c_msg msgs[2];
+    rt_uint8_t send_buf[1], recv_buf[1];
+
+    i2c_bus = (struct rt_i2c_bus_device *)rt_device_find("i2c2");
+    if(i2c_bus == RT_NULL)
+    {
+        rt_kprintf("can't find %s device!\n", "i2c2");
+    }
+
+    send_buf[0] = 0x6B;
+    recv_buf[0] = 0x6A;
+
+    msgs[0].addr = 0x68;
+    msgs[0].flags = RT_I2C_WR;
+    msgs[0].buf = send_buf;
+    msgs[0].len = 1;
+
+    msgs[1].addr = 0x68;
+    msgs[1].flags = RT_I2C_RD;
+    msgs[1].buf = recv_buf;
+    msgs[1].len = 1;
+
+    if(rt_i2c_transfer(i2c_bus, msgs, 2) == 2)
+        rt_kprintf("single byte read: 0x%02x success!\n", recv_buf[0]);
+    else
+        rt_kprintf("single byte read failed...\n");
+}
+
+MSH_CMD_EXPORT(i2c_sample_single_byte_read, i2c_sample_single_byte_read);
+```
+### 应用开发常见的错误
+- 单设备挂掉导致总线死锁
+- rt_i2c_transfer函数执行返回-5
+### 软件IIC驱动编写
+- 开启I2C框架
+- 选中I2C软件模拟设备功能
+- 编写I2C软件模拟驱动
+
+## SPI总线
+### 概念
+SP|(SerialPeripheralInterface，串行外设接口)是一种高速、全双工、同步通信总线，常用于短距离通讯，主要应用于EEPROM、FLASH、实时时钟、AD转换器、还有数字信号处理器和数字信号解码器之间。SPI一般使用4根线通信
+![image](images/day4/29.png)
+在RT-Thread 中，SPI设备分为'SPI总线”和“SPI设备”两大类，SPI总线对应SPI控制器，SPI设备对应不同CS连接的从设备，使用前需要先注册SPI总线，再把从设备挂载到总线上。
+### 打开SPI框架/添加SPI BUS驱动
+![image](images/day4/30.png)
+### 注册SPI设备
+挂载SPI设备:SPI驱动会注册SPI总线，SPI设备需要挂载到已经注册好的 SP|总线上。
+函数：
+```
+rt_err_t rt spi bus _attach device(struct rt_spi device  *device,const char *name,const char *bus name,void *user data)
+
+```
+此函数用于挂载一个SPI设备到指定的SPI总线，并向内核注册SPI设备，并将user data 保存到 SPI设备的控制块里。
+若使用 rt-thread/bsp/stm32目录下的 BSP 则可以使用下面的函数挂载SPI设备到总线:
+函数：
+```
+rt err trt hw spi device attach(const char*bus name,
+const char *device name,GPI0_TypeDef *cs gpiox,
+uint16 t cs gpio pin);
+```
+一般SPI总线命名原则为spix，SPI设备命名原则为 spixy，如spi10表示挂载在spi1总线上的0号设备。user data 一般为 SPI设备的CS引脚指针，进行数据传输时SPI控制器会操作此引脚进行片选。
+例程：
+```
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "dry spi.h"
+#include "drv gpio.h'
+static int spi attach(void){
+    return rt hw_spi device attach("spi2","spi20",GET_PIN(B, 12));
+}
+INIT DEVICE EXPORT(spi attach);
+```
+### 控制SPI设备相关API
+![image](images/day4/31.png)
+### 演示：SPI设备传输数据（一次通信）
+```
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include "drv_spi.h"
+#include "drv_gpio.h"
+
+static int spi_attach(void)
+{
+    return rt_hw_spi_device_attach("spi2", "spi28", GET_PIN(B, 12));
+}
+MSH_CMD_EXPORT(spi_attach, spi_attach);
+
+static int spi_example(void)
+{
+    rt_err_t ret = RT_EOK;
+    struct rt_spi_device *spi28 = (struct rt_spi_device *)rt_device_find("spi28");
+
+    struct rt_spi_configuration cfg;
+    cfg.data_width = 8;
+    cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_0 | RT_SPI_MSB;
+    cfg.max_hz = 1 * 1000 * 1000; /* 1M */
+    rt_spi_configure(spi28, &cfg);
+
+    rt_uint8_t sendBuff = 0xA0;
+    rt_uint8_t recvBuff = 0xF1;
+    ret = rt_spi_transfer(spi28, &sendBuff, &recvBuff, 1);
+    rt_kprintf("ret = %d\n", ret);
+
+    return ret;
+}
+MSH_CMD_EXPORT(spi_example, spi_example);
+```
+### 演示：单独发送数据（一次通信）
+```
+static int spi_send_one_data(void)
+{
+    rt_err_t ret = RT_EOK;
+    struct rt_spi_device *spi20 = (struct rt_spi_device *)rt_device_find("spi20");
+
+    struct rt_spi_configuration cfg;
+    cfg.data_width = 8;
+    cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_0 | RT_SPI_MSB;
+    cfg.max_hz = 1 * 1000 * 1000; /* 1M */
+    rt_spi_configure(spi20, &cfg);
+
+    rt_uint8_t sendBuff = 0x1A;
+    ret = rt_spi_send(spi20, &sendBuff, 1);
+    rt_kprintf("ret = %d\n", ret);      // return actual num 
+
+    return ret;
+}
+MSH_CMD_EXPORT(spi_send_one_data, spi_send_one_data);
+```
+### 演示：单独接收数据（一次通信）
+```
+static int spi_recv_one_data(void)
+{
+    rt_err_t ret = RT_EOK;
+    struct rt_spi_device *spi20 = (struct rt_spi_device *)rt_device_find("spi20");
+
+    struct rt_spi_configuration cfg;
+    cfg.data_width = 8;
+    cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_0 | RT_SPI_MSB;
+    cfg.max_hz = 1 * 1000 * 1000; /* 1M */
+    rt_spi_configure(spi20, &cfg);
+
+    rt_uint8_t recvBuff = 0x1A;
+    ret = rt_spi_recv(spi20, &recvBuff, 1);    // return actual num 
+    rt_kprintf("ret = %d\n", ret);
+
+    return ret;
+}
+MSH_CMD_EXPORT(spi_recv_one_data, spi_recv_one_data);
+```
+### 演示：连续两次发送数据
+```
+static int spi_send_then_send_data(void)
+{
+    rt_err_t ret = RT_EOK;
+    struct rt_spi_device *spi20 = (struct rt_spi_device *)rt_device_find("spi20");
+
+    struct rt_spi_configuration cfg;
+    cfg.data_width = 8;
+    cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_0 | RT_SPI_MSB;
+    cfg.max_hz = 1 * 1000 * 1000; /* 1M */
+    rt_spi_configure(spi20, &cfg);
+
+    rt_uint8_t sendBuff1[2] = {0x1A, 0x99};
+    rt_uint8_t sendBuff2[2] = {0x1A, 0x99};
+    ret = rt_spi_send_then_send(spi20, &sendBuff1, 2, &sendBuff2, 2);
+    rt_kprintf("ret = %d\n", ret); // RT_EOK means success
+
+    return ret;
+}
+MSH_CMD_EXPORT(spi_send_then_send_data, spi_send_then_send_data);
+```
+## 
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@@ -0,0 +1,69 @@
+# 【RSOC25】Day 5课程笔记：软件包的使用和网络相关应用
+## 软件包机制
+网站：https://packages.rt-thread.org/index.html
+### 步骤
+在env中通过图形化界面选择相应的软件包，保存即可下载到工程中
+![image](images/day5/1.png)
+具体：  
+在D:\2025-RSOC\rt-thread\bsp\qemu-vexpress-a9目录下，打开env  
+输入 `menuconfig  `
+按下键盘中的反斜杠按键，进入到搜索界面  
+![image](images/day5/2.png)
+如果有PKG为前缀的，就是软件包的索引
+![image](images/day5/3.png)
+按下空格，可以选中软件包
+![image](images/day5/4.png)
+按Q退出并保存，出来后，可以看见更新了.config
+![image](images/day5/5.png)
+输入`pkgs --update`下载软件包
+![image](images/day5/6.png)
+在VS中，使用`scons -j18`进行编译
+![image](images/day5/7.png)
+使用`.\qemu-nographic.bat`命令运行
+![image](images/day5/8.png)
+### 添加软件包LLM-Chat
+打开软件包仓库
+![image](images/day5/9.png)
+找到LLM-Chat
+![image](images/day5/10.png)
+获取API 链接：https://bailian.console.aliyun.com/?tab=model#/api-key
+把获取的API链接添加到下方
+![image](images/day5/11.png)
+进入 RT-Thread online packages →security packages→ mbedtls 菜单，修改 Maxiumfragment length in bytes 字段为 6144
+![image](images/day5/12.png)
+使能MbedTLS support
+![image](images/day5/13.png)
+使能网络驱动
+![image](images/day5/14.png)
+输入`pkgs --update`拉取软件包
+![image](images/day5/15.png)
+使用`scons -j18`进行编译，并使用`.\qemu-nographic.bat`命令运行，输入`help`命令，发现已经支持刚才下载的软件包了
+![image](images/day5/16.png)
+### Kconfig、Scons语法
+![image](images/day5/17.png)
+Scons基本命令：https://www.rt-thread.org/document/site/#/development-tools/build-config-system/SCons
+### 根据上面的流程安装netutils包（一个联网的小组件）
+![image](images/day5/18.png)
+开启NTP功能（可以联网获得当前时间，可以和本地时间进行校准）
+输入`pkgs --update`下载软件包，使用`scons -j18`进行编译，并使用`.\qemu-nographic.bat`命令运行
+![image](images/day5/19.png)
+检测联网功能：`ifconfig`
+![image](images/day5/20.png)
+输入`date`可以查看当前时间
+![image](images/day5/21.png)
+### 根据上面的流程安装mqtt软件包
+用到的网站：https://www.emqx.com/zh
+![image](images/day5/22.png)
+服务器地址改为broker.emqx.io（官方地址）
+![image](images/day5/23.png)
+id也需要随便设置一个
+![image](images/day5/24.png)
+配置好以后，输入`pkgs --update`下载软件包，使用`scons -j18`进行编译并使用`.\qemu-nographic.bat`命令运行
+输入`ka_mqtt`连接服务器
+![image](images/day5/26.png)
+打开MQTTX，订阅rtt-pub，可以发现控制台中已经接收到了语句
+![image](images/day5/25.png)
+输入`ps`命令，发现tcpip的栈已经占了97%
+![image](images/day5/27.png)
+可以将这两个栈的大小改大
+![image](images/day5/28.png)
\ No newline at end of file