PIC lights on, Assembly Language

Assignment Help:
errorlevel -302 ;prevents error code for this chipset
__config 0x373A ;chip config PIC spec page 146
processor 16F877A ;chipset

reset code 0x00
pagesel start ;Chooses pages from goto
nop ;does nothing
goto start

;**************************************************************************
code ;LABEL
start ;Label
clrf STATUS ;clear status from regester(Z is in status regester)
clrf PORTA ;clear port A
clrf PORTB ;clear port B
movlw 0x03 ;move literal into w
movwf PORTA ;move w into f

bsf STATUS, RP0 ;bit set f status, Regestry bank 0
movlw 0x07 ;move literal into w
movwf ADCON1
clrf TRISA ;clear register TriState regestry port A
clrf TRISB ;clear register TriState regestry port B
clrf TRISD ;clear register TriState regestry port D

CLRF STATUS
;*******************************************************************************
loop ;Start a Loop function
call LCD_update ;Calls LCD_Update function
call delay ;Calls delay function for time
goto loop ;Returns to loop


LCD_update_code code ;LAbEL
LCD_update ;LABEL

;IF CONTROL
sw1 btfsc PORTB, 1
goto display1
btfsc PORTB, 0
goto display2
display1
bcf PORTB, 0x01 ;turn Off LED 2
movlw 0xF9 ;Set number 1
movwf PORTD ;move w to f set PORTD
bsf PORTB, 0x00 ;turn On LED 1
goto finish_display

sw2 btfsc PORTB, 0
goto display2
btfsc PORTB, 1
goto display3
display2
bcf PORTB, 0x00 ;turn off LED
movlw 0x24 ;Set number 2
movwf PORTD
bsf PORTB, 0x01 ;turn on LED 2
goto finish_display


sw3 btfsc PORTB, 1
goto display3
btfsc PORTB, 0
goto display4
display3
bcf PORTB, 0x04 ;turn off LED 4
movlw 0x30 ;Set number 3
movwf PORTD
bsf PORTB, 0x02 ;turn on LED 3
goto finish_display


sw4 btfsc PORTB, 0
goto display3
btfsc PORTB, 1
goto finish_display
display4
bcf PORTB, 0x02 ;turn off LED 3
movlw 0x8D ;Set number 4
movwf PORTD
bsf PORTB, 0x04 ;turn on LED 4
goto finish_display

finish_display
RETURN

;*****************************************************************
;Variables for delay function

delay_udata udata ;LABEL
x res 2 ;x reserves 2 bytes

.delay code
delay
banksel x
clrf x
movlw 20
movwf x + 1
decfsz x, 1
goto $-1
decfsz x + 1, 1
goto $-3
return

end

Related Discussions:- PIC lights on

Arithmetic instruction-microprocessor , Arithmetic Instruction :           ...

Arithmetic Instruction :               These instructions are usually perform the arithmetic operations, like subtraction ,multiplication, addition, and division along with th

Risc characteristics-microprocessor, RISC Characteristics : The  concep...

RISC Characteristics : The  concept  of  RISC  architecture  include  an  attempt  to  reduce  execution  time  by make  simple  the instruction set of the computer. The main c

Linking a program-microprocessor, Linking a program The DOS linking pro...

Linking a program The DOS linking program LINK.EXE links the different object modules of function library routines and source program to produce an integrated executable code o

The 486, The 486 Introduced in the year 1989 the 80486 did not feature ...

The 486 Introduced in the year 1989 the 80486 did not feature any radically new processor technology. Instead, it joints a 386 processor, a cache memory controller and a math c

8086, Ask(2) Write a program to mask bits D3D2D1D0 and to set bits D5D4 and...

Ask(2) Write a program to mask bits D3D2D1D0 and to set bits D5D4 and to invert bits D7D6 of the AX register question #Minimum 100 words accepted#

Selecting array elements, implement the following c++ code in assembly lang...

implement the following c++ code in assembly language using the block-structured .IF and .while directives

Hashing, what is double hashing

what is double hashing

Internal architecture of microprocessor, Internal Architecture of Microproc...

Internal Architecture of Microprocessor : The architecture of 8086 provides a number of improvements over 8085 architecture. It supports a, a set of 16-bit registers ,16-bit AL

16f877 7seg display, do you have experts that know 4 digit 7_Seg dispaly

do you have experts that know 4 digit 7_Seg dispaly

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd