路过的各位大神，请问为什么我这个程序用了sprintf就无法返回？

stm988 · 发表于 2020-10-25 11:28:46

路过的各位大神，我移植了http://www.openedv.com/forum.php ... hlight=%B2%CB%B5%A5这位大神的LCD菜单，但是我发神用在设置时间中用了sprintf 就无法返回主菜单了，调试发现系统运行到了错误中断里！

void testdis()
{
uint8_t encode;
uint8_t t;
char str[1] = {0};
ClearDisplay();
while(1)
{
encode = encoder_read();
if(encode)
{
if(encode == 4)
{
break;
}
if(encode==1)
{
t++;
}
if(encode==2)
{
t--;
}
}
Disp_String_Menu(32,0,(uint8_t *)"时间设置",16,0,0);
sprintf(str,"test: %d",t); //<font color="#ff0000">如果注释这句，下面那句直接用一个字符串就能返回到主菜单，请问这里什么原因？？？</font>
LCD_P5x8Str(10,2,(uint8_t *)str);
}
}
//显示菜单项
void ShowMenu(uint8_t line) //显示菜单项并设置选中的项反白
{
int i;
line = 3-(currentMenu->range_to-line);
for(i = 0;i<4;i++)
{
if(i==line){
Disp_String_Menu(5,i,(uint8_t *)currentMenu->menuItems[i+currentMenu->range_from],16,1,0);
}else{
Disp_String_Menu(5,i,(uint8_t *)currentMenu->menuItems[i+currentMenu->range_from],16,0,0);
}
}
}
void func(void)
{
printf("hello\r\n");
}
void initMenu()
{
MainMenu.subMenus = malloc(sizeof(&MainMenu)*4);
MainMenu.subMenus[0] = NULL;//第1到3项没有子菜单置null,选择后程序会调用func中相应项中的函数
MainMenu.subMenus[1] = NULL;
MainMenu.subMenus[2] = NULL;
MainMenu.subMenus[3] = &searchMenu;//第四项查询有子菜单
MainMenu.func = malloc(sizeof(&func)*4);
MainMenu.func[0] = NULL;
MainMenu.func[1] = NULL;
MainMenu.func[2] = &testdis;//当选择了并按了确定，会执行func函数
MainMenu.func[3] = NULL;
MainMenu.parent = NULL;//表示是顶级菜单
searchMenu.subMenus = malloc(sizeof(&searchMenu)*6);
searchMenu.subMenus[0] = searchMenu.subMenus[1] = searchMenu.subMenus[2] = searchMenu.subMenus[3] = searchMenu.subMenus[4] = searchMenu.subMenus[5] = NULL;
searchMenu.func = malloc(sizeof(&printf)*6);
searchMenu.func[0] = searchMenu.func[2] = searchMenu.func[2] = searchMenu.func[3] = searchMenu.func[4] = searchMenu.func[5] = NULL;
searchMenu.parent = &MainMenu;//上一级菜单是MainMenu.进入查询子菜单后按返回键，将会显示这个菜单项
currentMenu = &MainMenu;
}
/**************************************************************
* 函数说明：Flash处理目录初始化函数 *
**************************************************************/
void MenuTree(void)
{
encode = encoder_read();
if (encode==4)
{
ClearDisplay();
ShowMenu(currentMenu->selected);
while(1)
{
encode = encoder_read();
switch(encode)
{
case 2://向右
if(currentMenu->selected == 0)//到了第一项
break;
else
{
currentMenu->selected--;
if(currentMenu->selected < currentMenu->range_from)//更新显示的区域
{
currentMenu->range_from = currentMenu->selected;
currentMenu->range_to = currentMenu->range_from+3;
}
ClearDisplay();
ShowMenu(currentMenu->selected);
break;
}
case 1://向左
if(currentMenu->selected == currentMenu->itemCount-1)
break;
else
{
currentMenu->selected++;
if(currentMenu->selected>currentMenu->range_to)
{
currentMenu->range_to = currentMenu->selected;
currentMenu->range_from = currentMenu->range_to-3;
}
ShowMenu(currentMenu->selected);
break;
}
case 3://Enter键
{
if(currentMenu->subMenus[currentMenu->selected] !=NULL)
{
currentMenu = currentMenu->subMenus[currentMenu->selected];
ClearDisplay();
ShowMenu(0);
}
else
{
if(currentMenu->func[currentMenu->selected] != NULL)
{
currentMenu->func[currentMenu->selected]();//执行相应的函数
ClearDisplay();
ShowMenu(currentMenu->selected);//返回后恢复原来的菜单状态
}
}
break;
}
case 4://返回键
{
if(currentMenu->parent!=NULL)//父菜单不为空，将显示父菜单
{
currentMenu = currentMenu->parent;
ClearDisplay();
ShowMenu(currentMenu->selected);
}
break;
}
default:
break;
}
}
}
}