原创 单片机RAM数组溢出

在编写输入法时，用到的一个结构数组，在结构数组中由于导入了太多的汉字导致堆栈溢出，其实就是RAM不够用了，因为程序中默认将全局的数组和变量放到RAM中去，我用的是MSP430F149它的RAM有2k，还不小，但是我的汉字太多，导致2k的RAM也不够了，程序如下：

struct t9PY_index

{

    unsigned char *t9PY_T9;

    unsigned char  *PY;

    unsigned char  *PY_mb;

};

struct t9PY_index  t9PY_index2[] ={{"2","a","阿啊"},

                                  {"3","e","讹俄娥峨鹅蛾额厄扼恶饿鄂遏"},

                                  {"4","i","阿啊"},

                                  {"5","l","厘梨狸"},

                                  {"6","o","哦"},

                                  {"7","p","阿啊"},

                                  {"8","u","阿啊"},

                                  {"9","w","阿啊"},

                                  {"22","ba","八巴叭扒吧芭疤捌笆拔跋把靶坝爸罢"},

                                           {"22","ca","擦"},

                                  {"23","ce","册侧厕测策"},

                                  {"24","ai","哎哀唉埃挨皑癌矮蔼艾爱隘碍"},

                                              {"24","ci","疵词茨瓷慈辞磁雌此次刺赐"},

                                  {"26","an","安氨鞍俺岸按案胺暗"},

                                  {"26","ao","凹敖熬翱袄傲奥澳懊"},

                                          ……………………….

}

但是ROM有64k啊，如果可以放到ROM中就可以解决了，然后我查了一下，发现果真可以，而且很简单，只需加个const就可以了，这样它就不会把这个分配到ROM中去调用，同时也需将调用的变量也加const，这样匹配后就可以了，问题就ok了。