added byteorder utils

firmware/basic/Makefile

@@ -14,6 +14,7 @@ OBJS += crc.o
 OBJS += menu.o
 OBJS += xxtea.o
 OBJS += ecc.o
+OBJS += byteorder.o
 
 LIBNAME=basic
 

firmware/basic/byteorder.c

@@ -0,0 +1,9 @@
+#include <stdint.h>
+
+void uint32touint8p(uint32_t v, uint8_t *p)
+{
+    *p++ = (v>>24)&0xFF;
+    *p++ = (v>>16)&0xFF;
+    *p++ = (v>> 8)&0xFF;
+    *p++ = (v>> 0)&0xFF;
+}

firmware/basic/byteorder.h

@@ -0,0 +1,5 @@
+#ifndef _BYTEORDER_H_
+#define _BYTEORDER_H_
+void uint32touint8p(uint32_t v, uint8_t *p);
+
+#endif