add mqttclient to the component, and add fire stm32f429 board demo.

components/connectivity/mqttclient/common/log/fifo.h

@@ -0,0 +1,37 @@
+/*
+ * @Author: jiejie
+ * @Github: https://github.com/jiejieTop
+ * @Date: 2019-12-25 23:54:38
+ * @LastEditTime : 2019-12-28 01:04:08
+ * @Description: the code belongs to jiejie, please keep the author information and source code according to the license.
+ */
+#ifndef _FIFO_H_
+#define _FIFO_H_
+
+#include "config.h"
+
+#define			FIFO_READ		0
+#define			FIFO_WRITE		1
+
+#define 		FIFO_MAX(a,b) (((a) > (b)) ? (a) : (b))
+#define 		FIFO_MIN(a,b) (((a) < (b)) ? (a) : (b))
+
+struct fifo
+{
+	unsigned int    size;       /* fifo size */
+	unsigned int    in;         /* data input pointer (in % size) */
+	unsigned int    out;        /* data output pointer (out % size) */
+	salof_mutex     mutex;   	/* mutex */   
+	salof_sem		sem;		/* sem */    
+	void            *buff;    /* data area */
+};
+typedef struct fifo * fifo_t;
+
+fifo_t fifo_create(unsigned int size);
+unsigned int fifo_write(fifo_t fifo, void *buff, unsigned int len, unsigned int timeout);
+unsigned int fifo_read(fifo_t fifo, void *buff, unsigned int len, unsigned int timeout);
+unsigned int fifo_read_able(fifo_t fifo);
+unsigned int fifo_write_able(fifo_t fifo);
+
+#endif // !_FIFO_H_
+