#include <os_endian.h>
#include "os_types.h"
int os_endian_is_little_endian(void){
union {
uint32_t i;
uint8_t c;
} test;
test.i = 0x12345678;
return (test.c == 0x78); // 如果取到的是低位字节,则是小端
}