初始化

2026-05-01 11:13:45 +08:00
commit bb1d10615e
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+#include "K210_USART.h"
+#include "Debug.h"  // 添加调试支持
+#include <stdio.h>
+#include <string.h>
+
+// 引用来自 main.c 的全局变量
+extern volatile char     g_k210_rx_buffer[];
+extern volatile uint16_t g_k210_rx_counter;
+extern volatile uint8_t  g_k210_rx_flag;
+
+// 全局变量：存储解析后的人脸识别结果
+FaceRecognitionResult K210_FaceResult;
+
+void K210_USART_Init(void)
+{
+    // 根据连接图.md: K210使用USART3 (PB10/PB11)
+    GPIO_InitTypeDef GPIO_InitStructure;
+    USART_InitTypeDef USART_InitStructure;
+    NVIC_InitTypeDef NVIC_InitStructure;
+
+    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
+    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
+
+    // PB10: USART3_TX
+    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
+    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
+    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+    GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+    // PB11: USART3_RX
+    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
+    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
+    GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+    USART_InitStructure.USART_BaudRate = 115200;
+    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
+    USART_InitStructure.USART_StopBits = USART_StopBits_1;
+    USART_InitStructure.USART_Parity = USART_Parity_No;
+    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
+    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
+    USART_Init(USART3, &USART_InitStructure);
+
+    USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
+
+    NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
+    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
+    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
+    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+    NVIC_Init(&NVIC_InitStructure);
+
+    USART_Cmd(USART3, ENABLE);
+}
+
+/**
+  * @brief  解析K210发送的人脸识别数据
+  * @param  buffer 接收到的数据缓冲区
+  * @param  result 解析结果存储结构体
+  * @retval 1=解析成功, 0=解析失败
+  *
+  * K210数据格式示例: "ID:2021001,NAME:Zhang_San,CONF:0.95"
+  * 或者: "UNKNOWN" (未识别到人脸)
+  */
+uint8_t K210_ParseFaceData(const char* buffer, FaceRecognitionResult* result)
+{
+    DEBUG_PRINT("[K210] Raw data: %s\r\n", buffer);
+
+    // 清空结果结构体
+    memset(result, 0, sizeof(FaceRecognitionResult));
+
+    // 检查是否为未识别
+    if (strstr(buffer, "UNKNOWN") != NULL)
+    {
+        DEBUG_INFO("[K210] Unknown face detected");
+        result->success = 0;
+        strcpy(result->student_name, "Unknown");
+        return 1;
+    }
+
+    // 尝试解析完整数据
+    char id[20] = {0};
+    char name[32] = {0};
+    float conf = 0.0f;
+
+    // 解析格式: ID:2021001,NAME:Zhang_San,CONF:0.95
+    int parsed = sscanf(buffer, "ID:%[^,],NAME:%[^,],CONF:%f", id, name, &conf);
+
+    if (parsed == 3)
+    {
+        DEBUG_PRINT("[K210] Parsed: ID=%s, Name=%s, Conf=%.2f\r\n", id, name, conf);
+
+        result->success = 1;
+        strncpy(result->student_id, id, 19);
+        result->student_id[19] = '\0';
+
+        // 将下划线替换为空格（方便显示）
+        strncpy(result->student_name, name, 31);
+        result->student_name[31] = '\0';
+        for (int i = 0; result->student_name[i] != '\0'; i++)
+        {
+            if (result->student_name[i] == '_')
+                result->student_name[i] = ' ';
+        }
+
+        result->confidence = conf;
+        return 1;
+    }
+
+    DEBUG_ERROR("[K210] Parse failed!");
+    return 0; // 解析失败
+}
+
+uint8_t K210_GetRxFlag(void)
+{
+    if (g_k210_rx_flag)
+    {
+        DEBUG_INFO("[K210] Data received, parsing...");
+
+        // 解析K210发送的人脸识别数据
+        K210_ParseFaceData((const char*)g_k210_rx_buffer, &K210_FaceResult);
+
+        g_k210_rx_flag = 0; // 清除标志位
+        g_k210_rx_counter = 0; // 重置计数器
+
+        // 清空缓冲区，防止数据粘连
+        memset((void*)g_k210_rx_buffer, 0, K210_RX_BUFFER_SIZE);
+
+        return 1;
+    }
+    return 0;
+}
+
+void K210_ClearRxFlag(void)
+{
+    g_k210_rx_flag = 0;
+    g_k210_rx_counter = 0;
+}