pic16f84 bsf in loop - Electronic Circuits Projects Diagrams Free

durgap · 27th March 2009, 06:08 AM

Hello everybody.
I have a simple problem, Please help me out.
The code snap goes this way

store_temp ;a defined variable
count_8 ; a counter variable to sit the bits of store_temp as desired

;************************
molw D'7'
movwf count_8
loop
bsf store_temp, count_8 ;setting bit one by one
incf count_8
decfsz count_8, 1
goto loop
end
;********************

The problem is the bsf is executed only once. Next cycle no bit is set in store_temp and the loop goes on
Thanks.

mabauti · 27th March 2009, 06:41 AM

I get this

Code:

Warning[202] D:\DOCS\DOCS\ASM\TIMER.ASM 81 : Argument out of range.  Least significant bits used.

this is because you only can use a constant (i.e. 0,1,2,..,7 etc.), not a variable (i.e. count_8, counter, etc)

colin55 · 27th March 2009, 07:46 AM

What are you trying to do in this instruction:

bsf store_temp, count_8 ;setting bit one by one

You are incf and then decf the same file (register)

What do you want to do?

After "goto loop" you should have a few instructions that output a bit to a LED to show the program has actually reached the end of what you are trying to do.

be80be · 27th March 2009, 08:40 AM

I would say he is wanting to compare store_temp to count. But the code don't make any since

Quote:

molw D'7'

is movlw

Quote:

bsf store_temp, count_8

you can't do that

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27th March 2009, 06:08 AM	#1
durgap	pic16f84 bsf in loop Hello everybody. I have a simple problem, Please help me out. The code snap goes this way store_temp ;a defined variable count_8 ; a counter variable to sit the bits of store_temp as desired ;********************** molw D'7' movwf count_8 loop bsf store_temp, count_8 ;setting bit one by one incf count_8 decfsz count_8, 1 goto loop end ;****************** The problem is the bsf is executed only once. Next cycle no bit is set in store_temp and the loop goes on Thanks.

27th March 2009, 06:41 AM	#2
mabauti	I get this Code: Warning[202] D:\DOCS\DOCS\ASM\TIMER.ASM 81 : Argument out of range. Least significant bits used. this is because you only can use a constant (i.e. 0,1,2,..,7 etc.), not a variable (i.e. count_8, counter, etc) Last edited by mabauti; 27th March 2009 at 06:41 AM.

27th March 2009, 07:46 AM	#3
colin55	What are you trying to do in this instruction: bsf store_temp, count_8 ;setting bit one by one You are incf and then decf the same file (register) What do you want to do? After "goto loop" you should have a few instructions that output a bit to a LED to show the program has actually reached the end of what you are trying to do.