diff --git a/firmware/basic/basic.h b/firmware/basic/basic.h
index 185c9ed..c4ec7bb 100644
--- a/firmware/basic/basic.h
+++ b/firmware/basic/basic.h
@@ -206,7 +206,12 @@ int applyConfig(void);
 #define SYSTICKSPEED 10
 
 // itoa.c
+#define F_ZEROS  (1<<0)
+#define F_LONG   (1<<1)
+#define F_SPLUS  (1<<2)
+#define F_SSPACE (1<<3)
 const char* IntToStrX(unsigned int num, unsigned int mxlen);
+const char* IntToStr(int num, unsigned int mxlen, char flag);
 
 // simpletime.c
 
diff --git a/firmware/basic/itoa.c b/firmware/basic/itoa.c
index 9cc8de5..abaef8f 100644
--- a/firmware/basic/itoa.c
+++ b/firmware/basic/itoa.c
@@ -1,8 +1,8 @@
-#define LEN 32
+#include "basic/basic.h"
 
+#define LEN 10
 const char* IntToStrX(unsigned int num, unsigned int mxlen){
 	static char s[LEN+1];
-	char * o=s;
 	int len;
 	s[LEN]=0;
 	for (len=(LEN-1);len>=(LEN-mxlen);len--){
@@ -13,3 +13,46 @@ const char* IntToStrX(unsigned int num, unsigned int mxlen){
 	};
 	return &s[len+1];
 };
+#undef LEN
+
+#define LEN 11
+const char* IntToStr(int num, unsigned int mxlen, char flag){
+	static char s[LEN+1];
+	int len;
+	s[LEN]=0;
+	char neg=0;
+
+	if(num<0){
+		num=-num;
+		neg=1;
+	};
+
+	for (len=(LEN-1);len>=(LEN-mxlen);len--){
+		s[len]=(num%10)+'0';
+		num/=10;
+	};
+    len++;
+
+    if(!(flag&F_LONG)){
+        while(s[len]=='0' && len < (LEN-1))
+            len++;
+    }else if(!(flag&F_ZEROS)){
+        int x=len;
+        while(s[x]=='0' && x < (LEN-1)){
+            s[x]=' ';
+            x++;
+        };
+    }
+
+	if(neg==1){
+        len--;
+        s[len]='-';
+    }else if(flag&F_SPLUS){
+        len--;
+        s[len]='+';
+    }else if(flag&F_SSPACE){
+		s[len]=' ';
+    };
+	return &s[len];
+};
+#undef LEN