AN546

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1 深圳市英锐恩科技有限公司单片机集成方案全方位解决服务商优质智能电子产品芯方案解决商 Microchip 产品用户参考手册深圳市英锐恩科技有限公司 ENROO-TECH(SHENZHEN)CO.,LTD 中国深圳市福田区福华路嘉汇新城汇商中心 27 楼 2701 Enroo-Tech Technologies CO., Limited Light-Tech International Limited 香港新界荃灣沙咀道號科技中心 5 樓 5 室联系电话 : , , , , 联系传真 : 联系邮件 :enroo@enroo.com 公司网站 : ; Add: 深圳市福田区福华路嘉汇新城汇商中心 27 楼 2701 Tel: , Fax:

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13 *ˆ +FN?H]^ 78CDgG $ + $ ÑÒ_í* \c89d [E)*F!?H]^ CEñ ko2@ W Eˆ Çš89EF!! G =ÑÒ89]X C vk œb! ÈE*G ]^! Ï /! GEG 89È]X?² 8CDaS \c89de)f?h89! ]^ =?žÿžu 89jE+]^!?H]^ CK Q W 89 W %l]^ C2 C2@ v

14 K b ]^ CÈ 2@ W W y ]^ \ 89 ]^b E*F k S¾[ uã v Êˆ1' (èj S )?H]X@]^K ( S@]^K?H]^ ª«B (b- ç (/ {Ë@89EìíI4jl äbc y % suv Ke y%5 /0/&#/1)) 22 $ VALUE ;TITLE "Single channel A/D (SAD)" ;This program is a simple implementation of the PIC16C71's ;A/D. 1 Channel is selected (CH0) ;The A/D is configured as follows: ; Vref = +5V internal ; A/D Osc. = internal RC ; A/D Channel = CH ;Hardware for this program is the PICDEM1 board ; ; ; Program: SAD.ASM ; Revision Date: ; Compatibility with MPASMWIN 1.40

15 00014 ; ; LIST P=16C ERRORLEVEL ; include "p16c71.inc" LIST ;P16C71.INC Standard Header File, Version 1.00 Microchip Technology LIST ; TEMP EQU 10h adif equ adgo equ ; ORG 0x ; ; goto start ; org 0x E goto service_int ;interrupt vector ; ; org 0x start movlw B' ' ;set port b as movwf PORTB ;all outputs ; tris PORTB ; / BSF STATUS, RP0 ; Bank MOVWF TRISB ; PortB as outputs BCF STATUS, RP0 ; Bank ; F call InitializeAD update movf ADRES,W ;get a/d value movwf PORTB ;output to port b call SetupDelay ;setup time >= 10uS bcf ADCON0,adif ;clear int flag 001A bsf ADCON0,adgo ;start new conversion 001B loop 001B btfsc ADCON0,adif ;a/d done? 001C goto update ;yes then update new value. 001D 281B goto loop ;no then keep checking ;

16 00055 ;no interrupts are enabled, so if the program ever reaches here, ;it should be returned with the global interrupts disabled. 001E service_int 001E return ;do not enable global ; ; ; ;InitializeAD, initializes and sets up the A/D hardware ;Select ch0 to ch3 as analog inputs, fosc/2 and read ch ; 001F InitializeAD 001F bsf STATUS,5 ;select Bank movlw B' ' ;select ch0-ch movwf ADCON1 ;as analog inputs bcf STATUS,5 ;select Bank C movlw B' ' ;select:rc,ch movwf ADCON0 ;turn on A/D clrf ADRES ;clr result reg return ; ;This routine is a software delay of 10uS for the a/d setup ;At 4Mhz clock, the loop takes 3uS, so initialize TEMp with ;a value of 3 to give 9uS, plus the move etc should result in ;a total time of > 10uS SetupDelay movlw movwf TEMP SD B decfsz TEMP, F 002A goto SD 002B return END MEMORY USAGE MAP ('X' = Used, '-' = Unused) 0000 : X---X XXXXXXXXXXXXXXXX XXXXXXXXXXXX All other memory blocks unused. Program Memory Words Used: 30 Program Memory Words Free: 994 Errors : 0 Warnings : 0 reported, 0 suppressed Messages : 0 reported, 2 suppressed

17 MPASM Released SLPAD.ASM :22:32 PAGE 1 LOC OBJECT CODE LINE SOURCE TEXT VALUE ;TITLE "A/D in Sleep Mode" ;This program is a simple implementation of the PIC16C71's ;A/D feature. This program demonstrates ;how to do a a/d in sleep mode on the PIC16C ;The A/D is configured as follows: ; Vref = +5V internal ; A/D Osc. = internal RC ; A/D Interrupt = OFF ; A/D Channels = ch ; ;The ch0 A/D result is displayed as a 8 bit binary value ;on 8 leds connected to port b. Hardware used is that of ;the PICDEMO board ; ; ; Program: SLPAD.ASM ; Revision Date: ; Compatibility with MPASMWIN ; ; LIST P=16C ERRORLEVEL ; include "p16c71.inc" LIST ;P16C71.INC Standard Header File, Version 1.00 Microchip Technology LIST ; TEMP EQU 10h adif equ adgo equ ; ; ORG 0x ; ; goto start ; org 0x04

18 D goto service_int ;interrupt vector ; ; org 0x start movlw B' ' ;make port b all movwf PORTB ;outputs ; tris PORTB ; / BSF STATUS, RP0 ; Bank MOVWF TRISB ; PortB as outputs BCF STATUS, RP0 ; Bank ; E call InitializeAD update movf ADRES,W movwf PORTB ;save in table call SetupDelay ; bcf ADCON0,adif ;clr a/d flag 001A bsf ADCON0,adgo ;start new a/d conversion ; 001B sleep 001C goto update ;wake up and update ; 001D service_int 001D return ;do not enable int ; ;InitializeAD, initializes and sets up the A/D hardware. 001E InitializeAD 001E bsf STATUS,5 ;select Bank1 001F movlw B' ' ;select ch0-ch movwf ADCON1 ;as analog inputs bcf STATUS,5 ;select Bank C movlw B' ' ;select:internal RC, ch movwf ADCON0 ;turn on a/d B clrf INTCON ;clear all interrupts B bsf INTCON,ADIE ;enable a/d return ; ;This routine is a software delay of 10uS for the a/d setup.

19 00077 ;At 4Mhz clock, the loop takes 3uS, so initialize TEMP with ;a value of 3 to give 9uS, plus the move should result in ;a total time of > 10uS SetupDelay movlw movwf TEMP SD B decfsz TEMP, F 002A goto SD 002B return ; END MEMORY USAGE MAP ('X' = Used, '-' = Unused) 0000 : X---X XXXXXXXXXXXXXXXX XXXXXXXXXXXX All other memory blocks unused. Program Memory Words Used: 30 Program Memory Words Free: 994 Errors : 0 Warnings : 0 reported, 0 suppressed Messages : 0 reported, 2 suppressed

20 MPASM Released INTAD.ASM :21:10 PAGE 1 LOC OBJECT CODE LINE SOURCE TEXT VALUE ;TITLE "Single channel A/D with interrupts" ;This program is a simple implementation of the PIC16C71's ;A/D. 1 Channel is selected (CH0). A/D interrupt is turned on, ;hence on completion of a/d conversion, an interrupt is generated ;The A/D is configured as follows: ; Vref = +5V internal ; A/D Osc. = internal RC Osc ; A/D Interrupt = On ; A/D Channel = CH ; ;The A/D result is displayed as a 8 bit value on 8 leds connected ;to port b. Hardware setup is the PICDEMO board ; ; ; Program: INTAD.ASM ; Revision Date: ; Compatibility with MPASMWIN ; ; LIST P=16C ERRORLEVEL ; include "p16c71.inc" LIST ; P16C71.INC Standard Header File, Version 1.00 Microchip Technology LIST ; flag equ TEMP equ adover equ adif equ adgo equ adie equ gie equ rp0 equ ; ORG 0x ; ;

21 goto start ; org 0x E goto service_ad ;interrupt vector ; ; org 0x start movlw B' ' ;init i/o ports movwf PORTB ; tris PORTB BSF STATUS, RP0 ; Bank MOVWF TRISB ; PortB as outputs BCF STATUS, RP0 ; Bank ; call InitializeAD update bcf flag,adover ;reset software a/d flag D call SetupDelay ;setup delay >= 10uS bcf ADCON0,adif ;reset a/d int flag (ADIF) bsf ADCON0,adgo ;start new a/d conversion 001A 178B bsf INTCON,gie ;enable global interrupt 001B loop 001B btfsc flag,adover ;a/d over? 001C goto update ;yes start new conv. 001D 281B goto loop ;no then keep checking ; 001E service_ad 001E 1C btfss ADCON0,adif ;ad interrupt? 001F retfie ;no then ignore movf ADRES,W ;get a/d value movwf PORTB ;output to port b bsf flag,adover ;a/d done set return ;do not enable int ; ; ;InitializeAD, initializes and sets up the A/D hardware ;select ch0 to ch3, RC OSC., a/d interrupt InitializeAD

22 bsf STATUS,rp0 ;select Bank movlw B' ' ;select ch0-ch movwf ADCON1 ;as analog inputs bcf STATUS,rp0 ;select Bank B clrf INTCON ;clr all interrupts B bsf INTCON,adie ;enable a/d int. 002A 30C movlw B' ' ;select:rc osc,ch B movwf ADCON0 ;turn on a/d 002C return ; ;This routine is a software delay of 10uS for the a/d setup ;At 4Mhz clock, the loop takes 3uS, so initialize TEMP with ;a value of 3 to give 9uS, plus the move should result in ;a total time of > 10uS. 002D SetupDelay 002D movlw.3 002E movwf TEMP 002F SD 002F 0B decfsz TEMP, F F goto SD return ; ; END MEMORY USAGE MAP ('X' = Used, '-' = Unused) 0000 : X---X XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XX All other memory blocks unused. Program Memory Words Used: 36 Program Memory Words Free: 988 Errors : 0 Warnings : 0 reported, 0 suppressed Messages : 0 reported, 2 suppressed

23 MPASM Released MULTAD.ASM :21:41 PAGE 1 LOC OBJECT CODE LINE SOURCE TEXT VALUE ;TITLE "A/D using Multiple Channels" ;This program is a simple implementation of the PIC16C71's ;A/D feature. This program demonstrates ;how to select multiple channels on the PIC16C ;The A/D is configured as follows: ; Vref = +5V internal ; A/D Osc. = internal RC osc ; A/D Interrupt = Off ; A/D Channels = all in a "Round Robin" format ; A/D reuslts are stored in ram locations as follows: ; ch0 --> ADTABLE ; ch1 --> ADTABLE ; ch2 --> ADTABLE ; ch3 --> ADTABLE ; ;The ch0 A/D result is displayed as a 8 bit value on 8 leds ;connected to port b ;Hardware: PICDEMO board ; Stan D'Souza 7/6/ ; ; Program: MULTAD.ASM ; Revision Date: ; Compatibility with MPASMWIN ; ; LIST P=16C ERRORLEVEL ; include "p16c71.inc" LIST ;P16C71.INC Standard Header File, Version 1.00 Microchip Technology LIST ; TEMP EQU 10h adif equ adgo equ ; ch2 equ ch3 equ C flag equ 0C

24 ADTABLE equ ; ORG 0x ; ; goto start ; org 0x goto service_int ;interrupt vector ; ; org 0x start movlw B' ' ;make port b movwf PORTB ;as all outputs ; tris PORTB ; / BSF STATUS, RP0 ; Bank MOVWF TRISB ; PortB as outputs BCF STATUS, RP0 ; Bank ; call InitializeAD update movf ADRES,W movwf 0 ;save in table movlw ADTABLE ;chk if ch subwf FSR,W ; / 001A 1D btfss STATUS,Z ;yes then skip 001B 281E goto NextAd ;else do next channel 001C movf ADRES,W ;get a/d value 001D movwf PORTB ;output to port b 001E NextAd 001E call NextChannel ;select next channel 001F 203C call SetupDelay ;set up > = 10uS bcf ADCON0,adif ;clear flag bsf ADCON0,adgo ;start new a/d conversion loop btfsc ADCON0,adif ;a/d done? goto update ;yes then update goto loop ;wait till done

25 00077 ; service_int return ;do not enable int ; ; ;InitializeAD, initializes and sets up the A/D hardware InitializeAD bsf STATUS,5 ;select pg movlw B' ' ;select ch0-ch movwf ADCON1 ;as analog inputs bcf STATUS,5 ;select pg0 002A 30C movlw B' ' ;select:fosc/2, ch0. 002B movwf ADCON0 ;turn on a/d 002C movlw ADTABLE ;get top of table address 002D movwf FSR ;load into indirect reg 002E clrf ADRES ;clr result reg. 002F return ; ;NextChannel, selects the next channel to be sampled in a ;"round-robin" format NextChannel movlw 0x08 ;get channel offset addwf ADCON0, F ;add to conf. reg bcf ADCON0,5 ;clear any carry over ;increment pointer to correct a/d result register clrf TEMP btfsc ADCON0,3 ;test lsb of chnl select bsf TEMP,0 ;set if ch1 or ch A btfsc ADCON0,4 ;test msb of chnl select bsf TEMP,1 ;set if ch0 or ch movlw ADTABLE ;get top of table addwf TEMP,W ;add with temp 003A movwf FSR ;allocate new address 003B return ; ;This routine is a software delay of 10uS for the a/d setup ;At 4Mhz clock, the loop takes 3uS, so initialize TEMp with ;a value of 3 to give 9uS, plus the move etc should result in ;a total time of > 10uS. 003C SetupDelay 003C movlw.3 003D movwf TEMP 003E SD 003E 0B decfsz TEMP, F

26 003F 283E goto SD return ; END MEMORY USAGE MAP ('X' = Used, '-' = Unused) 0000 : X---X XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX 0040 : X All other memory blocks unused. Program Memory Words Used: 51 Program Memory Words Free: 973 Errors : 0 Warnings : 0 reported, 0 suppressed Messages : 0 reported, 2 suppressed

27 深圳市英锐恩科技有限公司全球销售及服务网点单片机集成方案全方位解决服务商优质智能电子产品芯方案解决商联系信息 : 深圳市英锐恩科技有限公司 ENROO-TECH(SHENZHEN)CO.,LTD 中国深圳市福田区福华路嘉汇新城汇商中心 27 楼 2701 Enroo-Tech Technologies CO., Limited Light-Tech International Limited 香港新界荃灣沙咀道號科技中心 5 樓 5 室联系电话 : , , , , 联系传真 : 联系邮件 :enroo@enroo.com 公司网站 : ; Add: 深圳市福田区福华路嘉汇新城汇商中心 27 楼 2701 Tel: , Fax:

AN579

AN579 深圳市英锐恩科技有限公司单片机集成方案全方位解决服务商优质智能电子产品芯方案解决商 Microchip 产品用户参考手册深圳市英锐恩科技有限公司 ENROO-TECH(SHENZHEN)CO.,LTD 中国深圳市福田区福华路嘉汇新城汇商中心 27 楼 2701 Enroo-Tech Technologies CO., Limited Light-Tech International Limited