《KEY按键应用》大全文档格式.docx

1、bit Hbit;Hbit=HandSignal;/*采样信号线*/if （NewKey=FALSE）/*如果上一次按键事件已经北处理*/switch （ib_HandState） /*根据接收状态散转*/case LEAD:/*引导头接收情况*/if （Hbit） /*如果信号线是高电平*/if （ib_LowTimeMIN_LeadTime）&（ib_LowTimeMAX_LeadTime）/*判断低电平时间是否超时*/ib_HandState=RESTART; /*是的话复位接收程序*/break; case START:/*同步头接收情况*/if（Hbit）/*如果信号线是高电平*/i

2、b_HighTime+;/*高电平时间计数器加一*/if （ib_HighTimeMAX_SynTime）/*如果高电平时间超长,复位接收程序*/ /*如果信号线是低电平*/if （ib_HighTimeMIN_SynTime）&（ib_HighTime=1;/*接收数据字节右移一位*/MIN_B1TIME）&MAX_B1TIME） /*如果高电平宽度符合逻辑1标准,接收字节高位置一*/ib_KeyCodeib_KeyPoint+=0x80; ib_BitCount+;/*接收数据位计数器加一*/if （ib_BitCount7） /*如果接收满一个字节*/ib_BitCount=0; /*清

3、空位计数器*/ib_KeyPoint+;/*指向下一个字节*/if （ib_KeyPoint3）/*如果接收完整个数据*/unsigned char i;NewKey=TRUE;/*置有新键按下标志*/for （i=0;i4;i+） /TI=0; /SBUF=ib_KeyCode; /while（!TI）;/ /ib_HandState=RESTART; ib_HighTime=0; /*将高电平时间计数器清零*/*设定系统为等待上升沿状态*/default:if （ib_HandState=RESTART）/*如果程序处于复位状态*/ /*复位各项参数*/ib_HandState=LEAD;

4、ib_KeyCode0=0; ib_KeyCode1=0;ib_KeyCode2=0; ib_KeyCode3=0;ib_KeyPoint=0;NewKey=FALSE;好多遥控器（无线，红外）发射数据都是PPM调制的，以上程序稍微改动后可以应用于各种PPM调制信号的场合。44矩阵式键盘识别技术#include unsigned char ID;void delay10ms（void） unsigned char i,j;for（i=20;i0;i-）for（j=248;jj-）; void delay02s（void） unsigned char i;delay10ms（）;void mai

5、n（void） while（1） if（P3_7=0） if（P3_7=0） ID+;if（ID=4） ID=0;while（P3_7=0）;switch（ID） case 0:P1_0=P1_0;delay02s（）;case1:P1_1=P1_1;case 2:P1_2=P1_2;case 3:P1_3=P1_3;支持键盘双击事件的C程序设计！/*KeyBoard Encode ProgramThis Program can encode press_key up to 128 and it can deal KB_DBClick MessageThis is just a test pr

6、oram and only use 2 key.If More Key need to Encode ,please modify the function:KBKeyPress（） This Porgram use Message_Driver method,the KB_Msg is used to record what KB_Msg has occured.The meaning of SysKBMsg is list as following. Program Design:LiBaizhanVer:1.10Date:2003-3-16*/reg51.hintrins.hsbitKe

7、y1 =P10;Key2P11; Some System Var Pre_Definition Crystal Frequence is 11.0592MHz#defineTIME_2MS 0X74TIME_20MS0X043BKB_INTERNAL 3/*Key DBClk Detection Internal */SysKBMsg define Keyboard Message,it include Single_Click or Double_ClickIts bit6bit0 record key_encode and bit 7 record DBClk（1） or SglClk（0

8、）It can record and encode up to 127（27-1） keysNo key is press when it is 0This method did not deal key such as Ctrl_Key or Alt_Key or Shift_Key.etc./*_*/data unsigned char SysKBMsg=0;/*|7|6543210|*/*| D/S | KB6 | KB5 | KB4 | KB3 | KB2 | KB1 | KB0 |*/data unsigned char KBCounter=0;bitKBCounterStart=0

9、;KBCounterStop=0;/*if KeyBoard counter stop then this bit is 1*/KBCounterFlag=0;/*Current Counter is used by KeyBoard*/void TimerInt0（void） interrupt 1 /*timer 0 interrupt use to record how long key is press*/TR0=0;if（KBCounterFlag） /*Current Counter is used by KeyBoard*/if（KBCounterKB_INTERNAL）/*if

10、 DBClk Detection is not finish then detect continue*/KBCounter+;TR0=1;elseKBCounter=0;/*DBClk Detection is finish*/KBCounterStop=1;void DelayMS（unsigned int dltime）;void Init51（void）;unsigned char KBKeyPress（void）;/*only return what key is press*/void KBKeyEncode（void）; /*encode which key is pressed

11、 and DBClk or SglClk*/void KBStartTimer（unsigned char CntH,unsigned char CntL）;/*load counter initial value and start timer*/void KBStopTimer（void）;void KBDealPressKey（void）; /*deal key_press message*/Init51（）;while（1）KBKeyEncode（）; /*recored what KeyBoard Msg occure:which key is press and single cl

12、k or db clk*/KBDealPressKey（）;Delay Time is :（20+17*dl_time）*12/CrystalFrequence（us）void DelayMS（unsigned int dltime）unsigned int i;for（i=0;dltime;i+）;void Init51（void）SCON= 0x50; /* mode 1: 8-bit UART, enable receiverTMOD= 0x21; /* timer 1 mode 2: 8-Bit reload/* timer 0 mode 1: 16-bit TimerTH1= BAUD_4800;/* reload value 9600 baudTR1= 1; /* timer 1 runIE = 0X12; /* enable Serial INT,Timer0 INTES = 0; /* disable Serial INT*/EA = 1;