引入mqtt 引入cjson

middleware/Util/util.c

@@ -1,7 +1,7 @@
 #include "util.h"
+#include <ctype.h>
 
-
-float Bytes2Float(char * data)
+float Bytes2Float (char * data)
 {
 	Float ff ;
 	ff.byte[0] = data[1];
@@ -11,6 +11,85 @@ float Bytes2Float(char * data)
 	return ff.data;
 }
 
+uint32_t Bytes2Int (char * data)
+{
+	Int I;
+	I.byte[0] = data[1];
+	I.byte[1] = data[0];
+	I.byte[2] = data[3];
+	I.byte[3] = data[2];
+	return I.data;
+}
+
+
+// -----------------------------------------------------------------
+// 函数功能: hex字符串转byte数组
+// 函数名称: hexbyte_to_hex_str
+// 参数1   : src 源字符串
+// 参数2   : obj 目标字节数组
+// 说明    : "01020304" --> {0x01,0x03,0x03,x04} 或 "01 02 03 04"->{0x01,0x03,0x03,x04}
+// 返回值  : 1 成功
+// -----------------------------------------------------------------
+int hexstr_to_hexbyte (char *src, char *obj, uint16_t length)
+{
+	char h1, h2;
+	uint8_t  s1, s2;
+	int i;
+	length = length / 2;
+	for (i = 0; i < length; i++)
+	{
+		h1 = src[2 * i];
+		h2 = src[2 * i + 1];
+
+		s1 = toupper (h1) - 0x30;
+		if (s1 > 9)
+			s1 -= 7;
+		s2 = toupper (h2) - 0x30;
+		if (s2 > 9)
+			s2 -= 7;
+		obj[i] = s1 * 16 + s2;
+	}
+	return length;
+}
+
+
+// 754 转float
+float float_to_iee754 (float ff1,char * data)
+{
+	Float ff;
+	ff.data = ff1;
+	data[0] = ff.byte[3];
+	data[1] = ff.byte[2];
+	data[2] = ff.byte[1];
+	data[3] = ff.byte[0];
+
+	return ff.data;
+}
+
+
+
+// 754 转float
+float iee754_to_float (char * data)
+{
+	Float ff;
+	ff.byte[3] = data[0];
+	ff.byte[2] = data[1];
+	ff.byte[1] = data[2];
+	ff.byte[0] = data[3];
+	return ff.data;
+}
+
+
+
+uint32_t byte_to_Inverse(char * data)
+{
+	Int I;
+	I.byte[0] = data[3];
+	I.byte[1] = data[2];
+	I.byte[2] = data[1];
+	I.byte[3] = data[0];
+	return I.data;
+}
 
 
 

middleware/Util/util.h

@@ -3,18 +3,26 @@
 #include <stdint.h>
 
 
-typedef  union {
+typedef  union
+{
 	uint32_t data;
 	char byte[4];
 } Int;
-typedef  union {
+typedef  union
+{
 	float data;
 	char byte[4];
 } Float;
 
 
-float Bytes2Float(char * data);
+float Bytes2Float (char * data);
+uint32_t Bytes2Int (char * data);
+int hexstr_to_hexbyte (char *src, char *obj, uint16_t length);
+float iee754_to_float (char * data);
+uint32_t  byte_to_Inverse(char * data);
+// 754 תfloat
+float float_to_iee754 (float ff1,char * data);
 
-#endif 
+#endif