鍵盤數(shù)碼管實(shí)驗(yàn)報(bào)告

TinyHMI電路設(shè)計(jì)與制作實(shí)驗(yàn)報(bào)告實(shí)驗(yàn)?zāi)康模哼\(yùn)用AD畫出TinyHMI原理圖，PCB圖。最終制作出一個(gè)由兩個(gè)74HC595同步串轉(zhuǎn)并方式輸出的八位按鍵數(shù)碼管板；學(xué)會(huì)級聯(lián)實(shí)驗(yàn)原理：TinyHMI數(shù)碼管與鍵盤驅(qū)動(dòng)電路，它通過單片機(jī)I/O口控制2個(gè)74HC595來驅(qū)動(dòng)兩個(gè)共陰極LN3461AS數(shù)碼管與8個(gè)按鍵。其中，U20控制八個(gè)數(shù)碼管的位選位，U21控制八個(gè)數(shù)碼管的段選位；給數(shù)碼管的位選位輸入低電平，段選位輸送高電平，即可點(diǎn)亮數(shù)碼管。74HC595工作原理：74HC595內(nèi)置的移位寄存器與的工作原理，在CP上升沿的作用下，將D端的二進(jìn)制數(shù)據(jù)依次送入移位寄存器中。數(shù)據(jù)移位完成后，在STR上升沿的作用下，將移位寄存器的數(shù)據(jù)一次性送入數(shù)據(jù)存儲(chǔ)鎖存器輸出，從而保證在移位的過程中，輸出端的數(shù)據(jù)保持不變。原理圖如下圖所示：TinyHMI原理圖PCB圖如下圖所示：實(shí)驗(yàn)內(nèi)容:用2個(gè)74HC595來驅(qū)動(dòng)兩個(gè)共陰極LN3461AS數(shù)碼管與8個(gè)按鍵實(shí)驗(yàn)程序：#include<reg51.h>#include<intrins.h>#defineucharunsignedchar#defineuintunsignedint#defineFOSC11059200ul#defineT0_H(65536-(20*FOSC/(12*100000)))/256#defineT0_L(65536-(20*FOSC/(12*100000)))%256sbitSDA=P1^0;//數(shù)據(jù)端sbitSCP=P1^1;//脈沖sbitSTR=P1^2;//鎖存sbitanjian=P1^3;//按鍵端ucharduanma[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};ucharweima[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};ucharflag=0;ucharcount=0;ucharj;voidinitSys();voidshuchu();voidshuru(ucharucdata);voidanjianxuanze(void);voidmain(){uchari;initSys();while(1){if(flag==1){flag=0;while(j==0){anjianxuanze();}if(j!=0){for(i=0;i<=7;i++){shuru(duanma[j]);shuru(weima[i]);shuchu();//動(dòng)態(tài)掃描20ms進(jìn)中斷視覺效果所以只顯示選通端}j=0;}}}}voidinitSys(){TMOD=(TMOD&0xf0)|0x01;TH0=T0_H;TL0=T0_L;EA=1;TR0=1;ET0=1;}voidtimer0()interrupt1/*中斷*/{TH0=T0_H;TL0=T0_L;count++;if(count==10){count=0;flag=1;}}voidshuru(ucharucdata)/*串行輸入*/{uchari,uctmp;uctmp=ucdata;for(i=0;i<8;i++){SCP=0;if((uctmp&0x80)==0)SDA=0;elseSDA=1;SCP=1;uctmp=uctmp<<1;}}voidshuchu(void)/*并行輸出*/{STR=0;STR=1;}voidanjianxuanze(void){uchari;for(i=0;i<=7;i++){shuru(0x00);s