add tflite example and fix bug

examples/tflitemicro_speech_detection/tflitemicro_speech_detection.c

@@ -0,0 +1,53 @@
+/**
+ * @file tflitemicro_person_detection.c
+ * @author Derekduke (dkeji627@gmail.com); QingChuanWS (bingshan45@163.com); yangqings (yangqingsheng12@outlook.com)
+ * @brief  Person detection example based on TencentOS-Tiny and TFlite_Micro.
+ * @version 0.1
+ * @date 2021-01-05
+ * @copyright Copyright (c) 2021
+ * 
+ */
+
+#include "cmsis_os.h"
+#include "mcu_init.h"
+#include "micro_speech.h"
+
+uint8_t tensor_flag = 0;
+
+#define TASK1_STK_SIZE          1024
+void task1(void *arg);
+osThreadDef(task1, osPriorityNormal, 1, TASK1_STK_SIZE);
+
+#define TASK2_STK_SIZE          1024
+void task2(void *arg);
+osThreadDef(task2, osPriorityNormal, 1, TASK2_STK_SIZE);
+
+void task1(void *arg)
+{
+    while (1) {
+			printf("***task1\r\n");
+			osDelay(1000);
+    }
+}
+
+void task2(void *arg)
+{
+		uint8_t* data = NULL;//you can input your own data
+		extern void speech_run(uint8_t*); 
+		speech_run(data); 
+    while (1) {
+        printf("***task2\r\n");
+        osDelay(2000);
+    }
+}
+
+
+void application_entry(void *arg)
+{
+		extern void speech_init(void);
+		speech_init();
+    printf("***Start speech detection task! \r\n");
+    osThreadCreate(osThread(task1), NULL); // Create task1
+    osThreadCreate(osThread(task2), NULL); // Create task2
+}
+