嵌入式開發(fā)的一個騷操作!你用過嗎?
1 映射表在串口數(shù)據(jù)解析中的應用
1.1 數(shù)據(jù)結構
1.2 指令、函數(shù)映射表
1.3 串口解析函數(shù)實現(xiàn)
2 映射表在UI設計中的應用
2.1 數(shù)據(jù)結構
2.2 函數(shù)映射表
2.3 定義兩個變量保存當前場景和上一個場景
2.4 按下Up按鍵 跳轉到指定場景current_stage的值根據(jù)映射表改變
2.5 場景改變后 根據(jù)映射表執(zhí)行相應的函數(shù)Handler
typedef struct1.2 指令、函數(shù)映射表
{
char CMD[CMDLen];
unsigned char (*cmd_operate)(char *data);
}Usart_Tab;
static const Usart_Tab InstructionList[CMDMax]=1.3 串口解析函數(shù)實現(xiàn)
{
{"PWON",PowOn},
{"PWOFF",PowOff},
{"HDCP",HdcpOnOff},
{"/V",QueryKaVersion},
{"EDIDUpgrade",UpdataEDID},
{"Psave",Psave},
{"Precall",Precall},
{"Pclear",Pclear},
};
unsigned char DataAnalysis(char *buf){2 映射表在UI設計中的應用2.1 數(shù)據(jù)結構
unsigned char i,Result;
char *NEXT=NULL;
for(i=0;i<CMDMax;i++)
{
NEXT=StrCmp(buf,(char*)InstructionList[i].CMD);
if(NEXT!=NULL)
{
usartfuncp=InstructionList[i].cmd_operate;
Result=(*usartfuncp)(NEXT);
}
}
return Result;
}
菜單枚舉:
typedef enum
{
stage1=0,
stage2,
stage3,
stage4,
stage5,
stage6,
stage7,
stage8,
stage9,
}SCENE;
數(shù)據(jù)結構:
typedef struct {2.2 函數(shù)映射表
void (*current_operate)(); //當前場景的處理函數(shù)
SCENE Index; //當前場景的標簽
SCENE Up; //按下Up鍵跳轉的場景
SCENE Down; //按下Down鍵跳轉的場景
SCENE Right; //按下Left鍵跳轉的場景
SCENE Left; //按下Right鍵跳轉的場景
}STAGE_TAB;
STAGE_TAB stage_tab[]={2.3 定義兩個變量保存當前場景和上一個場景
#. operate Index Up Down Left Right
{Stage1_Handler, stage1, stage4, stage7, stage3, stage2},
{Stage2_Handler, stage2, stage5, stage8, stage1, stage3},
{Stage3_Handler, stage3, stage6, stage9, stage2, stage1},
{Stage4_Handler, stage4, stage7, stage1, stage6, stage5},
{Stage5_Handler, stage5, stage8, stage2, stage4, stage6},
{Stage6_Handler, stage6, stage9, stage3, stage5, stage4},
{Stage7_Handler, stage7, stage1, stage4, stage9, stage8},
{Stage8_Handler, stage8, stage2, stage5, stage7, stage9},
{Stage9_Handler, stage9, stage3, stage6, stage8, stage7},
};
char current_stage=stage1;2.4 按下Up按鍵 跳轉到指定場景current_stage的值根據(jù)映射表改變
char prev_stage=current_stage;
current_stage =stage_tab[current_stage].Up;2.5 場景改變后 根據(jù)映射表執(zhí)行相應的函數(shù)Handler
if(current_stage!=prev_stage)
{
stage_tab[current_stage].current_operate();
prev_stage=current_stage;
}
文章來源:物聯(lián)網IoT技術
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