Hi

I want to create assembly project tp program PIC using MPLAB V 8.92

Project-> Project Wizard -> Next
Step 1 Device : PIC18F4550 -> Next
Step 2 select tool suite



Step 3 Create New project file : C:\Users\System\Desktop\Assembly Project\Test.mcp -> Next



Step Four -> Next



File -> new
save as : Test

Project -> add files to project

 

File > New. Then type some code in the editor window and then File > Save As in your project folder. Then in the project explorer window make right click on Source Files folder and then you can add recently saved file to your project. EDIT: make sure the file extension match the language type (.asm for assembler).

 

File > New. Then type some code in the editor window and then File > Save As in your project folder. Then in the project explorer window make right click on Source Files folder and then you can add recently saved file to your project. EDIT: make sure the file extension match the language type (.asm for assembler).

I think I've done it.

I'm trying to understand assembly code given in here http://www.fypsolutions.com/assembl...-led-blink-code-example-in-assembly-language/

I am having trouble understanding code it's written without comments

LIST p=16F887             ;tell assembler what chip we are using
#include
<P16F887.INC>

__CONFIG  _CONFIG1, _INTOSCIO & _WDT_OFF & _PWRTE_ON & _MCLRE_ON & _CP_OFF & _CPD_OFF & _BOR_OFF & _IESO_OFF & _FCMEN_OFF & _LVP_OFF & _DEBUG_ON


CBLOCK h'20'
    COUNT1
    COUNT2
ENDC
    ORG        0x00

MAIN:
    BANKSEL        TRISB
    BCF         TRISB,0    
    BANKSEL        PORTB
MainLoop:
    BCF            PORTB,0
    CALL        DELAY3
    BSF            PORTB,0
    CALL        DELAY3
    GOTO        MainLoop            ; Do it again...
   

DELAY3:
    DECFSZ        COUNT1,1
    GOTO        DELAY3
    DECFSZ        COUNT2,1
    GOTO        DELAY3
    RETURN

END

Please help me to understand code

 

hi anukalp.
Do you have the datasheet for the 16F887 PIC.??

Which parts of the Code listing do you understand and not understand.?

E

 

hi anukalp.
Do you have the datasheet for the 16F887 PIC.??

Which parts of the Code listing do you understand and not understand.?

E

I've datasheet. 4.0 I/O PORTS



I don't understand how to configure port pins for input or output

 

To make a port pin to output, write to TRIS register corresponding bit '0', for input write '1'.
For making digital inputs you must set ADCON0 register accordingly, see section "ANALOG-TO-DIGITAL CONVERTER (ADC) MODULE" in datasheet.

 

hi anukalp.

This is the full datasheet.

Look at page # 46
E

 

Information about what PIN can be set to analog is in section "Pin Diagrams – PIC16F884/887" in the drawing but better seen in the table after drawing

 

if you need further info, look up the free tutorials by Nigel Goodwin and some really good ones by Gooligum.
Both step you through all the commands in Assembly.

 

if you need further info, look up the free tutorials by Nigel Goodwin and some really good ones by Gooligum.
Both step you through all the commands in Assembly.

Can you provide link for Gooligum tutorial which is free. I've searched but can't find

 

Comes up right away with a search https://www.gooligum.com.au/
https://www.gooligum.com.au/tutorials.html