; basic configuration ; Title "lcd1 for ap0201." ; list P = 16F877 ; include "p16f877.inc" ; use definition file for 16F877 ; ; __CONFIG b'11111101111001' ; ; memory - counters and max timing values in memory + rot value list CBLOCK 0x20 ; RAM starts at address 20h var1 var2 count1 count2 count3 count4 slcnt slflag datal datah addrl addrh adchi adclo data1 address ENDC indf equ 0x00 ORG 0x0000 ;reset vector clrf 0x3 ;zero status movlw 0x00 ;high byte of long jump movwf 0xA ;zero PCLATH goto start start movlw b'00000000' ; all port pins = low movwf PORTA movlw b'00000000' movwf PORTC movlw b'00000000' movwf PORTD movlw b'00000000' movwf PORTE bcf STATUS,RP1 bsf STATUS,RP0 ; set RAM Page 1 for TRIS registers ; INITIALISE PORTS ; binary used to see individual pin IO status movlw b'11101111' ; IO pins movwf TRISA movlw b'00000000' movwf TRISB movlw b'00000000' movwf TRISC ; ???? serial? movlw b'00000000' ;in and out movwf TRISD movlw b'00000000' movwf TRISE movlw b'1000010' ; analog pins movwf ADCON1 bcf STATUS,RP0 ; back to RAM page 0 movlw 0x00 movwf addrl movwf addrh movlw 0x10 movwf count3 ;deal with charging/sleep stuff movlw 0xff ; sleepcount movwf slcnt ;if below 3.9v (?) RA0 sleep call adcget ; if adc result less than 3.9v sleep btfsc adchi,1 btfss adchi,0 call schlaf ;lcd test hello call blanks call del_5 call initlcd loop call self ;self display code and loop here call disp16 movlw 0x10 movwf count4 loop1 call testsleep call del_5 decfsz count4,f goto loop1 goto loop testsleep call testsleep1 btfss slflag,0 goto rstsleep decfsz slcnt,f return call schlaf rstsleep movlw 0xff movwf slcnt return testsleep1 bcf slflag,0 call adcget btfss adchi,1 bsf slflag,0 btfsc adchi,0 return btfsc adclo,7 return bsf slflag,0 return adcget bcf STATUS,C movlw b'10000001' movwf ADCON0 clrf delay wait1 decfsz delay,f goto wait1 sample bcf PIR1,ADIF bsf ADCON0,GO wait2 decfsz delay,f goto wait2 wait3 btfsc ADCON0,GO goto wait3 getval movf ADRESH,w movwf adchi bcf STATUS,RP1 bsf STATUS,RP1 movf ADRESL,w bcf STATUS,RP0 movwf adclo return initlcd bcf PORTE,1 bcf PORTB,0 ;ale low bcf PORTE,2 ; en low bcf PORTE,0 ;rs low for control call del_125 movlw 0x38 movwf PORTD call pulse movlw 0x0c movwf PORTD call pulse movlw 0x06 movwf PORTD call pulse call del_5 return del_125 movlw 0x2a movwf count1 repeat decfsz count1,f goto repeat return del_5 movlw 0x29 movwf count2 delay call del_125 decfsz count2,f goto delay return pulse bsf PORTE,2 nop bcf PORTE,2 call del_125 return blanks movlw 0x10 movwf count1 movlw 0x30 movwf FSR movlw 0x20 store movwf indf decfsz count1,f goto incfsr return incfsr incf FSR,f goto store self ; loop through writing 16 bytes to 0x30 + movlw 0x08 movwf count1 movlw 0x30 movwf FSR store2 movf addrl,w bsf STATUS,RP1 bcf STATUS,RP0 movwf EEADR movlw 0x00 movwf EEADRH bsf STATUS,RP0 bsf EECON1,EEPGD bsf EECON1,RD nop nop bcf STATUS,RP0 movf EEDATA,w bcf STATUS,RP1 movwf datal bsf STATUS,RP1 movf EEDATH,w bcf STATUS,RP1 movwf datah ;test nv writing movlw 0x00 movwf address call pgwr movf datal,w movwf data1 call nvwr ;clear data bus for testing movlw 0x00 movwf PORTD movwf data1 call pgwr call nvrd movf data1,w movwf indf incf FSR,f ; movf datah,w movlw 0x20 movwf indf incf FSR,f incf addrl,f decfsz count1,f goto store2 decfsz count3,f return reset1 movlw 0x00 movwf addrl movlw 0x10 movwf count3 return disp16 bcf PORTE,1 bcf PORTB,0 ;ale low bcf PORTE,2 bcf PORTE,0 movlw 0x80 movwf PORTD call pulse bsf PORTE,0 call del_125 movlw 0x30 movwf FSR getchar movf 0x00,w movwf PORTD call pulse movlw 0x37 subwf FSR,w btfsc STATUS,Z goto half movlw 0x3f subwf FSR,w btfsc STATUS,Z return incf FSR,f goto getchar half bcf PORTE,0 call del_125 movlw 0xc0 movwf PORTD call pulse bsf PORTE,0 incf FSR,f call del_125 goto getchar reset2 bcf PORTB,0 bcf PORTE,2 bsf PORTE,1 bsf PORTE,0 return pgwr ;test write page w to latch call reset2 bsf PORTB,0 movwf PORTD nop nop bcf PORTB,0 return nvwr call reset2 call addr bcf PORTE,1 movf data1,w movwf PORTD nop nop bsf PORTE,1 return nvrd call reset2 call addr ;portd input bcf STATUS,RP1 bsf STATUS,RP0 movlw b'11111111' movwf TRISD bcf STATUS,RP0 bcf PORTE,0 nop nop movf PORTD,w movwf data1 bsf PORTE,0 bcf STATUS,RP1 bsf STATUS,RP0 movlw b'00000000' movwf TRISD bcf STATUS,RP0 return addr bcf STATUS,C rlf address,f bcf address,0 movf address,w movwf PORTB return schlaf ;set ra4 as input then sleep bcf STATUS,RP1 bsf STATUS,RP0 ; set RAM Page 1 for TRIS registers movlw b'11111111' ; IO pins movwf TRISA bcf STATUS,RP0 ; back to RAM page 0 sleep return end