PIC单片机按键检测,单双击、长短按识别

1、RB7/ICSPDATRB6/ICSPCLKRB5/AN13fT1GRB4/AN1VP1DRS3MN9/PGM/C12IN2-RB2/ANfl?P1BRB1/AN10/P1C/C12IW3-RB0WN12/INTVddVssRC7/RX/DTRcerrxjcKRC5/SDORC4/SDI/SDA硬件PIC16F883芯片，10个按键，4位数码管。【芯片引脚】RE3/MCLR/VPPRA0/ANQ/LJLPWUG12INO-RA1/ANirC12IN1-RA2/AN2/Vref-/CVrefJC2IN+RA3/aN3A/ref+/C1IN-RA4H0CK1/CWUTRA5/AN4/SS/C2OU

2、TVs3RA7/OSC1/CLKINRA6/OSC2JCLKDUTRCOT1DSOJT1CKIRC1fT10SI/CCP2RC2/P1A/CCP1RC3/SCK/SCL【数码管连接】PORTC连接数码管的8段LED，PORTA连接数码管的4个共阴极（控制选通位）。【按键连接】PIC16F883VccVCGFORTE4I/OFOLTB1PQRTECGNDS7-S8S9S1S3S2S4S10按键扫描程序在上一篇博文里面有说明，现在还是使用上面的扫面方式（代码都是一样的）。用记录按键按下和弹起的时间判断是不是长按和双击。TMR1设置，1:4分频、1:8预分频，计数周期为8uS。TMR1溢出一次时间为

3、0.524288Skeypress记录TMR1溢出的次数。keypress大于等于2就跳出检测，认为他是长按（时间为1.048576S）。keypress1且keyrelease1，再次按下的keypress1就认为是双击。如下图：KP按键按下，KR按键弹起。:十：；：击双-|ijj攵按&单illir-+:叽1?I一舟Z实现代码】1#include2345_C0NFIG_C0NFIG1,_LVP_OFF&_FCMEN_ON&_IESO_OFF&_BOR_OFF&6_CPD_0FF&_CP_OFF&_MCLRE_ON&_PWRTE_ON&_WDT_OFF&7_INTRC_0SC_N0CLK0UT

4、9_C0NFIG10_C0NFIG2,_WRT_OFF&_B0R21V111213udata_shr1415counterres1;计数个位1617counter0res1;计数十位1819counter1res1;扫描按键变量2021counter2res1;延时程序微调参数2223key_stateres1;按键状态2425keynumres1;按键标号2627swapres1;确认按键转换值2829keypressres13031keypressbakres13233keyreleaseres13435LED1res13637LED2res13839LED3res14041LED4res

5、14243UDATA4445counter3res14647counter4res14849signres150515253resetcode0 x00005455pageselstart5657gotostart58596061;int_vectorcode0 x00046263code6465start6667bankselANSEL;设置PORTA为数字模式6869clrfANSEL7071bankselANSELH;设置PORTB为数字模式7273clrfANSELH7475bankselTRISB;设置PORTB为输入模式7677movlwb111111117879movwfTRIS

6、B8081bankselWPUB;设置PORTB弱上拉8283movlwb111111118485movwfWPUB8687bankselOPTION_REG8889movlwb01000101;TMR064分频9091movwfOPTION_REG9293bankselT1CON9495movlwb10010001;打开TMR1，设置1:8预分频，内部时钟源1:4分频9697movwfT1CON9899bankselTRISA;设置PORTA为输出，接数码管的共阴极100101movlwb11110000102103movwfTRISA104bankselPORTA106107clrfPOR

7、TA108bankselTRISC110111movlwb00000000;设置PORTC为输出，接8段数码管112movwfTRISC114115clrfcounter1116117118119loop120121movlwHIGHTable1122123movwfPCLATH124125movfcounter1,0126127callTable1128129bankselTRISB130131movwfTRISB132133movfcounter1,0134135callTable1136137bankselPORTB138139movwfPORTB140141movfPORTB,0142

8、143movwfkey_state144145movlwb11001000146147iorwfkey_state,1148149movfcounter1,0150151callTable1152153154155xorwfkey_state,0156157movwfswap158159comfswap,1160161incfszswap,1162163gotocase1164165166167incfcounter1,1168169movfcounter1,0170171callTable1172173bankselTRISB174175movwfTRISB176177movfcounter

9、1,0178179callTable1180181bankselPORTB182183movwfPORTB184185movfPORTB,0;读取I/O状态186187movwfkey_state188189movlwb11001000190191iorwfkey_state,1192193movfcounter1,0194195callTable1196197xorwfkey_state,0198199movwfswap200201comfswap,1202203incfszswap,1204205gotocase2206207208209incfcounter1,1210211movfco

10、unter1,0212213callTable1214215bankselTRISB216217movwfTRISB218219movfcounter1,0220221callTable1222223bankselPORTB224225movwfPORTB226227movfPORTB,0;读取I/O状态228229movwfkey_state230231movlwb11001000232233iorwfkey_state,1234235movfcounter1,0236237callTable1238239xorwfkey_state,0240241movwfswap242243comfsw

11、ap,1244245incfszswap,1246247gotocase3248249250251incfcounter1,1252253movfcounter1,0254255callTable1256257bankselTRISB258259movwfTRISB260261movfcounter1,0262263callTable1264265bankselPORTB266267movwfPORTB268269movfPORTB,0;读取I/O状态270271movwfkey_state272273movlwb11001000274275iorwfkey_state,1276277movf

12、counter1,0278279callTable1280281xorwfkey_state,0282283movwfswap284285comfswap,1286287incfszswap,1288289gotocase4290291gotocontinue292293294295case1296297btfsckey_state,4298299gotokey2300301movlwd1302303movwfkeynum304305callDealKeyPress306307gotocontinue308309key2310311btfsckey_state,2312313gotokey33

13、14315movlwd2316317movwfkeynum318319callDealKeyPress320321gotocontinue322323key3324325btfsckey_state,1326327gotokey4328329movlwd3330331movwfkeynum332333callDealKeyPress334335gotocontinue336337key4338339btfsckey_state,0340341gotocontinue342343movlwd4344345movwfkeynum346347callDealKeyPress348349gotocon

14、tinue350351352353354355356357358359case2360361;362363;下面代码实现K10K8K5的按键处理364365btfsckey_state,2366367gotokey8368369movlwd10370371movwfkeynum372373callDealKeyPress374375gotocontinue376377;378379;处理K8380381key8382383btfsckey_state,1384385gotokey5386387movlwd8388389movwfkeynum390391callDealKeyPress39239

15、3gotocontinue394395;396397;处理K5398399key5400401btfsckey_state,0402403gotocase3404405movlwd5406407movwfkeynum408409callDealKeyPress410411gotocontinue412413414415case3416417;418419;处理K6/K9420421btfsckey_state,1422423gotokey6463424425movlwd9426427movwfkeynum428429callDealKeyPress430431gotocontinue43243

16、3key6434435btfsckey_state,0436437gotocase4438439movlwd6440441movwfkeynum442443callDealKeyPress444445gotocontinue446447case4448449;450451;处理K7452453btfsckey_state,0454455gotocontinue456457movlwd7458459movwfkeynum460461callDealKeyPress462464465continue466467calldisplay468469clrfcounter1470471gotoloop4

17、72473474475476477;478479;按键去抖，约8mS480delay483movlwd4484movwfcounter2486LOOP2488489bankselTMR0490491clrfTMR0492493LOOP1494bankselINTCON496497btfssINTCON,T0IF498gotoLOOP1500501bcfINTCON,T0IF502503decfszcounter2,1504gotoLOOP2506507return508509510511delay2512513incfszcounter3,1514515gotodelay2516517retu

18、rn518519520521;522523;按键处理程序524525;526527DealKeyPress528529clrfLED1530531clrfLED2532533clrfLED3534535clrfLED4536537calldelay538539540541bankselTMR1H542543clrfTMR1H544545bankselTMR1L546547clrfTMR1L548549clrfkeypress550551presstime552553bankselPIR1554555btfssPIR1,TMR1IF556557gotonext558559bcfPIR1,TMR1

19、IF560561incfkeypress562563movlwd2564565subwfkeypress,0566567bankselSTATUS568569btfscSTATUS,C570571gotolongpress572573next574575movfcounter1,0576577callTable1578579bankselTRISB580581movwfTRISB582583bankselPORTB584585movwfPORTB586587movfPORTB,0;读取I/O状态588589movwfkey_state590591movlwb11001000592593iorw

20、fkey_state,1594595movfcounter1,0596597callTable1598599xorwfkey_state,0600601movwfswap602603comfswap,1604605incfszswap,1606607gotopresstime608609610calldelay611612613614bankselTMR1H615616clrfTMR1H617618bankselTMR1L619620clrfTMR1L621622clrfkeyrelease623624releasetime625626bankselPIR1627628btfssPIR1,TM

21、R1IF629630gotonext1631632bcfPIR1,TMR1IF633634incfkeyrelease635636movlwd1637638subwfkeyrelease,0639640bankselSTATUS641642btfscSTATUS,C643644gotoclick645646next1647648movfcounter1,0649650callTable1651652bankselTRISB653654movwfTRISB655656bankselPORTB657658movwfPORTB659660movfPORTB,0;读取I/O状态661662movwfk

22、ey_state663664movlwb11001000665666iorwfkey_state,1667668movfcounter1,0669670callTable1671672xorwfkey_state,0673674movwfswap675676comfswap,1677678incfszswap,1679680gotoover681682gotoreleasetime683684over685686calldelay687688bankselTMR1H689690clrfTMR1H691692bankselTMR1L693694clrfTMR1L695696clrfkeypres

23、s697698presstime1699700bankselPIR1701702btfssPIR1,TMR1IF703704gotonext2705706bcfPIR1,TMR1IF707708incfkeypress709710movlwd1711712subwfkeypress,0713714bankselSTATUS715716btfscSTATUS,C717718gotoclick719720next2721722movfcounter1,0723724callTable1725726bankselTRISB727728movwfTRISB729730bankselPORTB73173

24、2movwfPORTB733734movfPORTB,0;读取I/O状态735736movwfkey_state737738movlwb11001000739740iorwfkey_state,1741742movfcounter1,0743744callTable1745746xorwfkey_state,0747748movwfswap749750comfswap,1751752incfszswap,1753754gotopresstime1;双击;长按755756movfkeynum,0757758movwfLED1759760movlwd10761762movwfLED2763764i

25、ncfcounter765766gotoback767768longpress769770movfkeynum,0771772movwfLED2773774movlwd10775776movwfLED1777778gotoback;单击779780click781782movfkeynum,0783784movwfLED1785786movwfLED2787788789790back791792callCountNum793794return795796797798;799800;按键计数801802;803804805806CountNum807808movlwd9809810subwfco

26、unter,0811812bankselSTATUS813814btfscSTATUS,C815816gotoadd817818incfcounter819820gotoover1821822add823824incfcounter0825826clrfcounter827828movlwd10829830subwfcounter0,0831832bankselSTATUS833834btfscSTATUS,C835836gotoclear837838gotoover1839840clear841842clrfcounter0843844over1845846movfcounter,08478

27、48movwfLED4849850movfcounter0,0851852movwfLED3853854return855856857858859860861862863864;865866;显示数码管867868;869870display871872873874bankselPORTA875876movlwb11111110877878movwfPORTA879880movfLED1,0881882callTable3883884bankselPORTC885886movwfPORTC887888calldelay2889890891892bankselPORTA893894movlwb11111101895896movwfPORTA897898movfLED2,0899900callTable3901902bankselPORT