ASM - Problem at first step!

[Bruce]

There are .asm template files in your MPASM directory that show basic templates for beginners.

Look in C:\Program Files\Microchip\MPASM Suite\Template\Code

For a template for the 16F676.

[Megahertz]

Thanks Bruce
Really useful information.

[Megahertz]

I am able to compile it now but it is not working. I am using Proteus 7.9 software to simulate it but
Is something wrong with the code?

	LIST P=16F676
	#include <p16F676.inc>
	__CONFIG   _CP_OFF & _CPD_OFF & _BODEN_OFF & _MCLRE_ON & _WDT_OFF & _PWRTE_ON & _INTRC_OSC_NOCLKOUT

	ORG	0
	GOTO	5
	ORG	4
	GOTO	5
	ORG	5

	CLRF	H'07'
	BSF	H'03',5
	CLRF	H'07'
	CLRF	H'91'
	BCF	H'03',5

	BSF	H'07',4
	BSF	H'07',5
	BSF	H'07',2
	BSF	H'07',3

	END

[mister_e]

couple of mistakes in there... no problem it's your first I guess

You haven't cleared the TRISC register
no real need for multiple ORG and GOTO at the begining
If you want to use GOTOs, you want to use/define some label and jump to them.
It's really more readable to use register name instead of their addresses.
Make suire you're always in the good BANK when writing/writing to a registers. Datasheet show everything 'bout that
Maybe not a bad idea to retrieve the oscillator calibration at the begining.

Like Bruce said, check out your MPASM\Template\CODE folder.

[Megahertz]

couple of mistakes in there... no problem it's your first I guess

You haven't cleared the TRISC register
no real need for multiple ORG and GOTO at the begining
If you want to use GOTOs, you want to use/define some label and jump to them.
It's really more readable to use register name instead of their addresses.
Make suire you're always in the good BANK when writing/writing to a registers. Datasheet show everything 'bout that
Maybe not a bad idea to retrieve the oscillator calibration at the begining.

Like Bruce said, check out your MPASM\Template\CODE folder.

Thanks. I was under the impression that the below statements clear the TRISC register.

	CLRF	H'07' ; clear portC
	BSF	H'03',5  ; Jump to bank 1
	CLRF	H'07'  ; Clear Trisc
	CLRF	H'91' ; Clear ANSEL register
	BCF	H'03',5  ; Jump to Bank 0

[Megahertz]

Even tried this now. But

	......
	ORG	5

	CLRF	PORTC
	BSF	STATUS,RP0
	CLRF	TRISC
	CLRF	ANSEL
	BCF	STATUS,RP0
	BSF	PORTC,4
	BSF	PORTC,5
	BSF	PORTC,2
	BSF	PORTC,3

	END

[cncmachineguy]

Compiles and works fine in MPLAB SIM. PORTC bits 4,5,2,3 all get set. Post your Protous file and we can have a look for you.