编译器之编程及语法Tips

1.定义一个变量在固定的地址：

__ICCARM__    IAR编译器

__CC_ARM       Keil编译器

#if defined (__ICCARM__)
unsigned char ucPassword @0x20000004 = 0x01;
#elif defined (__CC_ARM)
unsigned char ucPassword __attribute__((at(0x20000000))) = 0x01;
#endif