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?是一片具有串行接口的可同时驱动?位共阴式数码管 或只独立的智能显示驱动芯?片该芯片同时还可连接多达键的键盘矩阵单?片即可完成显示键盘接口的全部功能?内部含有译码器可直接接受码或?进制码并同时具有 种译码方式参见后文?此外还具有多种控制指令如消隐闪烁左移右移段寻址等具有片选信号可方便地实现多于 位?的显示或多于键的键盘接口? ? ! # ! $#%&?()*+%&,-?./?01234?56?(?789:;? ?!?#?$?%?&?()?)? ?!? ?!#?#? ?!?$%?$?#?#?&()*?+?&(),?+?!?%-./012345612?#?%78(9?!?#?%78:)?!?#?!?;?A1?!?BCDE1?AFG?!HIBCJ?A12?!?DEK?L122M?!?N.ODEJDEK(9?L122M?!?(9.O?LPQ12?&?!?N.O?L1?AF?!?N.O?LRST?!?UV()WX12?Y?DEZV?DE_?LYDE?%&a? bc DE?defgDEThiY?bcijkYH?lmnopqr?stuvbcwxgDETyziYWXK|?TiYWXu?DE? ?gDE?iY$?%?noWX?78?#?#?z?()?78V,?+1?yz?CDE?N?.O?L?1?()?yz?C?L?N?.O?L1?78?+?L?!?x?L()?(9?dyz#eDE1?78V()?dN?.O?L1?78NDE?Tu1?YV(9?%-.?(9?+1V*?+d?f?-.1?78V,?+?&?$?()6(9?6(9?&?$?$?H?H?6(9?(9?#?!a?“DE?iY?“ ;fi?fi? 6u? fl?lmWXY?ijkYlm?noqr6T?u?V? ?V4252LP39?Jfi?fi?Vno?wx“DET?V?252LP39?fi?fi”?Vno?DE?K“DEi6V“? ;fi?fi? 66T?“u?V?“DE?K“DE?6T?“u? fi? Y? fi?JwxR?“DETY?V?252LP394?fi?fi”?Vno?DE?K?“DE6?A(BCD%&?L- ? ? ? ? ? ? ? ?/*?E?HIS?ZVDEJV?Z?)?)?)?0?V?Lef?DE1-? ?x?+?+?&?Y?1?1?L- ? ? ? ? ? ? ? ?/*?DEKu?DE?i?Y?gDEY?-?x?,?+? ?L? ? ? ? ? ? ? ?JV? ?L?DEV?)?)?)?&$?LZ?0 ?Y?Y?d0Y?L?V?1g?%?%?no? ? ? ? ? ? ? ?E?YnoqrZ?0?non+?&?+?&?o?TYWXV?nolm? ? ? ? ? ? ? ?E?YlmqrZ?0?lm+?&?+?&?d?u?t?lmqrT?1h?g?g?)?t?)Yht?hg?jV?WXT?Tu?)Y?Lht?9?d?f$? ?Y1?h?Y?jVlmqr?*?Y%GEFGHI(J?KLMNOPQR?%&STUVW%&X?Y+?&?+?ZKLD?OP?%DE? ? ? ? ? ? ? ?V?DE ?V?%?J?uD?Y?J?uD?Y?DEJ?/V?;?Z?V?*?+?&?+? ?fi?Y?VVV?Vfi?$? ?YVV?fi?Y?V$? ? ?DE? ? ? ? ? ? ? ?E ?V? ? ?JY?uDE?K?%DE?N.O?LDE? ? ? ? ? ? ? ?gDE;N9dY-.?K?DE?EYuHI?V?BCfYDE?TuHI?V?+?&?+?Y-.?.-t?!?)Y/A01?YDE?2?_?LYDEDEYFGV ?!? ?C A_?LYDEFGV? ?!CAN?.O?LDEFGV V? ?Cf?!?YDET V?Y.O?wx?DE1Y?!?fiAY?V(9WX?KfiAY3aV()?!?WXp4#euDEx#Y15?DE? ? ?_?LDE? ? ?DE *?L *?N.ODE?N.ODE?*?(9Y.O?*?Y?0?0?#67?0?J?fY.O?#?4?jklmqr?/.OY?)?.O?J?#f.OY 8? 89?4)?.O?JY 89?:;c4?$?0?J 89? 8.O?#?=Y 8?A?$?&?$?0B;u?YC?|9?0?Y D?D?VD9?Y?Y?&?&?/?Y?F?Y?*.O?ZYGHIJ?V+?Y? )+?K,Y?%G?L+?*%?M*%Y?NO?PQ?YRSTU?:?uVH?*GUM? WS?Y?0?XdY6?uY#Y?Z|? ?Z?V?)yz? ?_?a?b=1ic? ?d?Yc?0Eefg?Ee?=?h?Ya?uV0?#K?#?F*?!?frY?#uY?Ya?#?z?.?/?,?+V*?+T?i?j?Y12k?)?!?&?.? WX?TiY?V?i?Y?qrV?nod.-178(9V,?+?1)#efN.ODEh?%?(9i-.Y?.O?Y? ?0?JY.?.O?J?)*-.Y?lmYnP?:$5o?p?/?Vyz?#6?!F?V6X?!)g?Z?=FqFr?7)F?Y?stHIhY?u?)4v?*?YGHIJEFQR( ._abXcdefgSJ.Dh?ij?klImn?o p qr._abDst?uvNw?Vp4.O()ThiNfY.O?U#S?TC?1h?Y?“?#$5?!?|?#?i?1?pV$5?,?!?.?0 1)23452?j?$5J?112?Y#V? Y1?p?Y?112?/? $ title (HD7279A Test Program) $ DB;*?; RAM;*BIT_COUNT DATA 07FHTIMER DATA 07EHTIMER1 DATA 07DHTEN DATA 07CHDATA_IN DATA 020HDATA_OUT DATA 021H;*?; I/O;*Y?#?DAT BIT P1.2 ;HD7279ADATAP1.2Y?#?KEY BIT P1.3 ;HD7279AKEYP1.3Y?#?CS BIT P1.4 ;HD7279ACSP1.4Y?#?CLK BIT P1.5 ;HD7279ACLKP1.5 ORG 000H JMP START ORG 100H?START: MOV SP,#2FH ;? MOV P1,#11011011B ;I/O?1i MOV TIMER,#50 ;25MS?!?START_DELAY: MOV TIMER1,#255START_DELAY1:DJNZ TIMER1,START_DELAY1 DJNZ TIMER,START_DELAY?a? bc DE MOV DATA_OUT,#10100100B ;() CALL SEND3aV*?+ SETB CS ;CS?.-MAIN: JB KEY,MAIN ;.-?CN.ODE MOV DATA_OUT,#00010101B ; CALL SEND CALL RECEIVEjV*?+ SETB CS ;CS?U# MOV B,#10 ;16BCD MOV A,DATA_IN DIV AB MOV TEN,A? ?“DE?d? MOV DATA_OUT,#10100001B ;2?“ ?9?Z? ;,?L ;?CDEf CALL SEND ;HD7279A MOV DATA_OUT,#10100001B CALL SEND?L?DE fi? MOV DATA_OUT,#10000001B ;(2) CALL SEND?C?Hf MOV DATA_OUT,TEN ;HD7279A CALL SEND?L?DE fi MOV DATA_OUT,#10000000B ;(1? ;) CALL SEND?C?Hf MOV DATA_OUT,B ;HD7279A CALL SEND SETB CSp4-.?WAIT: JNB KEY,WAIT ; JMP MAIN;*?C HIf*?; 1HD7279;*j?SEND: MOV BIT_COUNT,#8 ;=8jV,?+ CLR CS ;CSr?1 CALL LONG_DELAY ;?(9 ?SEND_LOOP: MOV C,DATA_OUT.7 ;1 MOV DAT,CjV*?+ SETB CLK ;CLK4?C?L“ MOV A,DATA_OUT ; RL A MOV DATA_OUT,Ah?1 CALL SHORT_DELAY ;jV,?+ CLR CLK ;CLKh?1 CALL SHORT_DELAY ;_? ?CR? DJNZ BIT_COUNT,SEND_LOOP ;8?CR? CLR DAT ; RET;*;#euHI*?; HD7279;*j?RECEIVE: MOV BIT_COUNT,#8 ;=8jV*?+ SETB DAT ;P1.2(DATA)()WX ;()r?1 CALL LONG_DELAY ;kV*?+RECEIVE_LOOP: SETB CLK ;CLKh?1 CALL SHORT_DELAY ;?L“ MOV A,DATA_IN ; RL A MOV DATA_IN,AN?u?L MOV C,DAT ; MOV DATA_IN.0,CkV,?+ CLR CLK ;CLK CALL SHORT_DELAY?#e ?L DJNZ BIT_COUNT,RECEIVE_LOOP;8?jV,?+ (9WX CLR DAT ;DAT() RET;*?1?$5; ;*j?112ViLONG_DELAY: MOV TIMER,#25 ;50uSDELAY_LOOP: DJNZ TIMER,DELAY_LOOP RETj?112ViSHORT_DELAY: MOV TIMER,#4 ;8uSSHORT_LP: DJNZ TIMER,SHORT_LP? RET END#$5?|?#?i?1?p$5?xyY?.?0.?$5?,?j?$5J?112?Y#.?.?V?Y1?p?112? ?/? TITLE HD7279A TEST LIST P=16C54 INCLUDE P16C5X.INC;*01?; ;*BIT_COUNT SET 0X07DATA_OUT SET 0X08DATA_IN SET 0X09TEN SET 0X0ATIMER SET 0X0BTIMER1 SET 0X0C;*?; I/O;*?#?YCS EQU 0 ;CS16C54RA0?#?YCLK EQU 1 ;CLK16C65RA1?#?YDAT EQU 2 ;DAT16C54RA2?#?YKEY EQU 3 ;KEY16C54RA3 ORG 0x1FF GOTO START ORG 0X00;*?1?$5; ;*j?112ViLONG_DELAY MOVLW D16 ;50uS MOVWF TIMER?DELAY_LOOP DECFSZ TIMER GOTO DELAY_LOOP RETLW 0j?112ViSHORT_DELAY MOVLW D3 ;8uS MOVWF TIMERSHORT_LP DECFSZ TIMER GOTO SHORT_LP RETLW 0;*?C HIf*?; 1HD7279;*4?C?L1)SEND MOVWF DATA_OUT ;DATA_OUT MOVLW D8j? MOVWF BIT_COUNT ;=8jV,?+ BCF PORTA,CS ;CSr?1 CALL LONG_DELAY ;SEND_LOOP BCF STATUS,C(9 ? RLF DATA_OUT ;1 BCF PORTA,DAT BTFSC STATUS,C BSF PORTA,DATjV*?+ BSF PORTA,CLK ;CLKh?1 CALL SHORT_DELAY ;jV,?+ BCF PORTA,CLK ;CLK CALL SHORT_DELAY_? ?CR? DECFSZ BIT_COUNT ;8?CR?Cu? GOTO SEND_LOOP ; BCF PORTA,DAT?CR? RETLW 0 ;*;#euHI*?; HD7279;*RECEIVE MOVLW D8j? MOVWF BIT_COUNT ;=8jV()WX MOVLW B11111100 ;RA2(DATA) TRIS PORTAr?1 CALL LONG_DELAY ;kV*?+RECEIVE_LOOP BSF PORTA,CLK ;CLKh?1 CALL SHORT_DELAY ;? BSF STATUS,C BTFSS PORTA,DAT BCF STATUS,CN?u?L RLF DATA_IN ;kV,?+ BCF PORTA,CLK ;CLK CALL SHORT_DELAY?#e ?L DECFSZ BIT_COUNT ;8 GOTO RECEIVE_LOOP?jV(9X MOVLW B11111000 ;RA2(DATA) TRIS PORTA RETLW 0 ;* ?; ;*?START MOVLW B11111000 ;I/O TRIS PORTA MOVLW B11111001 MOVWF PORTA?1i MOVLW 0X19 ;25MS MOVWF TIMERSTART_DELAY MOVLW 0XFF MOVWF TIMER1START_DELAY1 DECFSZ TIMER1 GOTO START_DELAY1 DECFSZ TIMER GOTO START_DELAY?a? bc DE MOVLW B10100100 ;() CALL SEND3aV*?+ BSF PORTA,CS ;CS;*?$5; ;*?.-MAIN BTFSC PORTA,KEY ; GOTO MAIN.-?CN.ODE MOVLW B00010101 ;?CN.ODE CALL SEND ;N.O? CALL RECEIVE ;HD7279AjV*?+ BSF PORTA,CS ;CS;*?U#; 16BCD;* CLRF TENGET_DEC MOVLW D10 SUBWF DATA_IN,W SKPC GOTO OVER MOVWF DATA_IN INCF TEN GOTO GET_DEC;*?C-.Y?f;BCDHD7279;*? ?“DE?d?“;2?9?Z?L;“DEOVER MOVLW B10100001 ;?CDEf CALL SEND ;HD7279A“DE MOVLW B10100001 ;?CDEf CALL SEND ;HD7279A?L?DE fi? MOVLW B10000001 ;(2)?CDEf CALL SEND ;HD7279A MOVFW TEN?C?Hf CALL SEND ;HD7279A?L?DE fi? MOVLW B10000000 ;(1)?CDEf CALL SEND ;HD7279A MOVFW DATA_IN?C?Hf CALL SEND ;HD7279A BSF PORTA,CSp4-.?WAIT BTFSS PORTA,KEY ; GOTO WAIT GOTO MAIN END?u ?Y ?$5:MCS51C?Y$5 ? ?$Y?HD7279AC51,C#include ?/* *r?1void long_delay(void); / h?1void short_delay(void); / ?1void delay10ms(unsigned char); / 10MS)fvoid write7279(unsigned char, unsigned char);/ HD7279;N9unsigned char read7279(unsigned char);/ HD7279?CuHIvoid send_byte(unsigned char); / #euHIunsigned char receive_byte(void); / e?/* I/O *unsigned char digit5;unsigned char key_number, j, k;unsigned int tmr;unsigned long wait_cnter;sbit cs=P14; / cs at P1.4?#?sbit clk=P15; / clk P1.5?#?sbit dat=P12; / dat P1.2?#?sbit key=P13; / key P1.3DE/* HD7279A *#define CMD_RESET 0xa4#define CMD_TEST 0xbf#define DECODE0 0x80#define DECODE1 0xc8#define CMD_READ 0x15#define UNDECODE 0x90#define RTL_CYCLE 0xa3#define RTR_CYCLE 0xa2#define RTL_UNCYL 0xa1#define RTR_UNCYL 0xa0#define ACTCTL 0x98#define SEGON 0xe0#define SEGOFF 0xc0#define BLINKCTL 0x88?$5/* *main()? while (1) ?1 for (tmr=0;tmr0x2000;tmr+); / a? send_byte(CMD_RESET); / HD7279A/*?DE?/ /*?DE send_byte(CMD_TEST); / ?1i ? for (j=0;j3;j+) / 3 delay10ms(100); bc? send_byte(CMD_RESET); / /*noDE?.O#?/ h?-.Y.?9?)?-./ , 10?-.?)u?/ S0/* wait_cnter=0; key_number=0xff;fi?jVno? write7279(BLINKCTL,0xfc); / 12fi?= write7279(UNDECODE,0X08); / 1_fi?= write7279(UNDECODE+1,0x08);/ 2_ do ).- if (!key) / key_number=read7279(CMD_READ); N9.? / write7279(DECODE1+1,key_number/16); fi?.?* ? / 28 write7279(DECODE1,key_number&0x0f); fi?.?, ? / 18p4-.? while (!key); / wait_cnter=0; wait_cnter+; while (key_number!=0 & wait_cnter0x30000);)-.VM1?)u? / 0?bcnojk write7279(BLINKCTL,0xff); / /*?/ /*?V for (j=0;j5;j+) / 00000 digitj=0; write7279(DECODE0+j,digitj); )?f while (digit49) digit0=0; digit1+; if (digit19) digit1=0; digit2+; if (digit29) digit2=0; digit3+; if (digit39) digit3=0; digit4+; if (digit49) digit4=0; write7279(DECODE0,digit0); if (digit0=0) write7279(DECODE0+1,digit1);? if (digit1=0) write7279(DECODE0+2,digit2); if (digit2=0) write7279(DECODE0+3,digit3); if (digit3=0) write7279(DECODE0+4,digit4); delay10ms(150);bc? send_byte(CMD_RESET); / /*?L?DE?/ /* write7279(UNDECODE+7,0x49);fi?-?uH? 2 / 8 delay10ms(80);/*?“ ?/ /2 H?6 ? ?“6 ?/ 3,3/* for (j=0;j23;j+) ? send_byte(RTR_CYCLE); / 23 delay10ms(12); for (j=0;j23;j+) ?“? send_byte(RTL_CYCLE); / 23 delay10ms(12); /*? ?“DE?/ 0?/* for (j=0;j16;j+) ?“DE send_byte(RTL_UNCYL); / write7279(DECODE0,j);? DE?fi? / 01 delay10ms(50); delay10ms(150); send_byte(CMD_RESET);/*? ?DE?/ 1/* for (j=0;j16;j+) ?“DE send_byte(RTR_UNCYL); / write7279(DECODE1+7,j);? DE?fi? / 08 delay10ms(50); delay10ms(150);/*lmDE?/ /* k=0xff; for (j=0;j6;j+) k=k/2;Mu?“ulm? write7279(ACTCTL,k);/ delay10ms(100); 3a ? write7279(ACTCTL,0xff); / 8 delay10ms(100);bc? send_byte(CMD_RESET); / /*?%DE?DE/ /* for (j=0;j64;j+)? h?% write7279(SEGON,j)
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