programming/compiling in MPLAB problem - Page 2 - Electronic Circuits Projects Diagrams Free

Hank Fletcher · 8th June 2008, 09:37 PM

I tried this:

Code:

list p=16f88
	include (p16f88.inc)
	__CONFIG _CONFIG1, 0x2F34
	org 0
	bsf STATUS, RP0
	movlw b'00001110'
	movwf OPTION_REG
	movlw b'00111111'
	movwf TRISA
	bcf STATUS, RP0
	movlw b'10000000'
	xorwf PORTA, f
	sleep
	end

Still no blinking. Does this code presume an external oscillator? I'm not using one.

blueroomelectronics · 8th June 2008, 09:44 PM

Well the above program blinks the RA7 LED, about once a second.

futz · 8th June 2008, 09:45 PM

Quote:

Originally Posted by Hank Fletcher

Still no blinking. Does this code presume an external oscillator? I'm not using one.

Here's a working blinky for RA1 of the 16F88:

Code:

	LIST	p=16F88
	include "P16F88.inc"

	cblock	0x20		;start of general purpose registers
	d1,d2,d3
	endc

	org	0x0000
init
	banksel CMCON		;bank 1
	movlw	0x07		;turn comparators off
	movwf	CMCON
	clrf	ANSEL		;all pins digital
	clrf	TRISA		;all pins outputs
	movwf	TRISB
	banksel	PORTA		;select bank 0

main	bsf	PORTA,1
	call	delay
	bcf	PORTA,1
	call	delay
	goto	main

delay	movlw	0x15			;2499992 cycles
	movwf	d1
	movlw	0x74
	movwf	d2
	movlw	0x05
	movwf	d3
delay_0	decfsz	d1, f
	goto	dd2
	decfsz	d2, f
dd2	goto	dd3
	decfsz	d3, f
dd3	goto	delay_0
	return

	end

Hank Fletcher · 8th June 2008, 10:12 PM

Quote:

Here's a working blinky for RA1 of the 16F88

I'll give that a try. I'm sure with Bill's code it's something basic I'm missing in terms of writing, compiling, programming the PIC.

Sorry to really break it down here, but do you mind walking me through it? I've successfully made a fair share of PIC programs and circuits using GCBASIC, but I'm looking to take the training wheels off! I know a lot of this might seem really obvious, but it seems the only way to troubleshoot it, so here it goes:

1) I open up MPLAB.
2) I select File> New.
3) This opens an "Untitled" window, which I notice is very bare, as in no code or even PC numbers in the margin when I type stuff in. That's new to me, because they're always there when you compile from GCBASIC.
4) I copy and paste in futz's code, but the text is all black, as in no colour-coding that I usually see in a compiled GCBASIC program. Also, the "program," "release from reset," etc icons are not present.

That's where I'm at. Can you get me to point B?

kchriste · 8th June 2008, 10:25 PM

Quote:

Originally Posted by Hank Fletcher

1) I open up MPLAB.
2) I select File> New.
3) This opens an "Untitled" window, which I notice is very bare, as in no code or even PC numbers in the margin when I type stuff in.

That's because you haven't saved the file yet. Save it as blinky.asm and then you'll get your code colours.
I use the code templates located at:
C:\Program Files\Microchip\MPASM Suite\Template\Code
They provide a nice starting point for building a project. Look for the file f88temp.asm

Quote:

Also, the "program," "release from reset," etc icons are not present.
That's where I'm at. Can you get me to point B?

To get these, you need to select your programmer. Click "Programmer/Select Programmer" and select the ICD2, etc. Same goes for the debugger; you won't have any icons for it until you select which one to use.

futz · 8th June 2008, 10:30 PM

Quote:

Originally Posted by Hank Fletcher

I'll give that a try. I'm sure with Bill's code it's something basic I'm missing in terms of writing, compiling, programming the PIC.

Well, mine is missing the config line. I need to add one. It's assuming you're setting it with MPLAB.

Here's a bad, but working, config line, shown in context with the preceding two lines:

Code:

	LIST	p=16F88
	include "P16F88.inc"
	__config _CONFIG1, 0x3f2a

That really should have the actual definitions in there rather than just a number, so you could see at a glance what fuses you were setting. At the time I did that I didn't know any better. But it should work fine anyway. Fix it later.

Quote:

1) I open up MPLAB.
2) I select File> New.
3) This opens an "Untitled" window, which I notice is very bare, as in no code or even PC numbers in the margin when I type stuff in. That's new to me, because they're always there when you compile from GCBASIC.
4) I copy and paste in futz's code, but the text is all black, as in no colour-coding that I usually see in a compiled GCBASIC program. Also, the "program," "release from reset," etc icons are not present.

That's where I'm at. Can you get me to point B?

No.

Do this:
1. Start MPLAB
2. Click Project/Project Wizard
3. Click Next
4. Select your exact MCU from the list and hit Next
5. Select your language toolsuite (Microchip MPASM Toolsuite) and Next
6. Create a directory for it and a New Project File in that directory and Next
7. Hit next at Step Four as you don't have a source file saved yet
8. Hit Finish
9. Click Project/Add New File To Project. Be sure you're pointing to the correct directory. Name the file something.asm and hit Save.
10. Paste the source code into the window and hit CTRL-S

Assemble and program at will

Hank Fletcher · 8th June 2008, 10:37 PM

Quote:

Originally Posted by kchriste

That's because you haven't saved the file yet. Save it as blinky.asm and then you'll get your code colours.

Yay, I have colours now!

Quote:

To get these, you need to select your programmer. Click "Programmer/Select Programmer" and select the ICD2, etc.

D'oh! I should have realized that. This has been wearing on me a bit, I think!

Quote:

Originally Posted by futz

Well, mine is missing the config line. I need to add one. It's assuming you're setting it with MPLAB.

Okay, I'll give that a try. I'm gonna go with kchriste's suggestions first, and if that doesn't work I'll try doing through the project wizard.

Hank Fletcher · 8th June 2008, 10:55 PM

Argh! That's still not working for me. Is this suppose to be making PortA.1 flash (so pin 18 of the IC)?

The only configuration bit I changed was the internal oscillator as RB6.

blueroomelectronics · 8th June 2008, 10:59 PM

No PORTA.7 pin 16
Many A ports are A/D or have comparators that have to be disabled, A7 is a digital I/O pin by default.

Hank Fletcher · 8th June 2008, 11:26 PM

Quote:

No PORTA.7 pin 16
Many A ports are A/D or have comparators that have to be disabled, A7 is a digital I/O pin by default.

I'm still getting nothing.

Wait,

Did you mean pin 16 with just your code, or futz's as well?

blueroomelectronics · 8th June 2008, 11:47 PM

My code. What sort of programmer are you using?

futz · 9th June 2008, 01:16 AM

OK. Here it is, complete, and all in one post, with photos.

That's a blue LED, so I used a 180 ohm resistor. For a red or green or amber LED you'd probably use a 330 ohm or even 470. Not terribly critical. But do use a current limiting resistor somewhere in that range.

It has a 33K MCLR pullup. Any value from 10K to 33K is fine. It's not critical at all.

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Code:

	LIST	p=16F88
	include "P16F88.inc"
	__config _CONFIG1, _WDT_OFF & _INTRC_IO & _MCLR_ON
	ERRORLEVEL 0, -302

	cblock	0x20
	d1,d2,d3
	endc

	org	0x0000
init
	banksel	CMCON		;bank 1
	movlw	0x72		;8MHz internal osc
	movwf	OSCCON
	movlw	0x07		;turn comparators off
	movwf	CMCON
	clrf	ANSEL		;all pins digital
	movlw	0x00		;all pins outputs
	movwf	TRISA
	movwf	TRISB
	banksel	PORTA		;select bank 0

main	bsf	PORTA,1
	call	delay
	bcf	PORTA,1
	call	delay
	goto	main

delay	movlw	0x15
	movwf	d1
	movlw	0x74
	movwf	d2
	movlw	0x02
	movwf	d3
delay_0	decfsz	d1,f
	goto	dd2
	decfsz	d2,f
dd2	goto	dd3
	decfsz	d3,f
dd3	goto	delay_0
	return

	end

futz · 9th June 2008, 01:31 AM

And here's the same thing in C (SourceBoost BoostC):

Code:

#include <system.h>
#include <stdio.h>
#pragma CLOCK_FREQ 8000000
#pragma DATA _CONFIG, _WDT_OFF & _INTRC_IO & _LVP_OFF & _MCLR_ON

void main(void)
{
	osccon=0x72;
	cmcon=0x07;
	ansel=0;
	trisa=0;
	while(1){
		porta.1=1;
		delay_ms(500);
		porta.1=0;
		delay_ms(500);
	}
}

Hank Fletcher · 9th June 2008, 02:47 AM

Still nothing. Once I've saved the .asm, how do I get the .hex file? I've been going to file>export, then leaving the options as they are, and then saving as a .hex file. Then I import the .hex file. Is that right?

blueroomelectronics · 9th June 2008, 03:00 AM

It would help if we knew the programmer / software you're using. Some do not import the config fuses properly.

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8th June 2008, 09:44 PM	#17
blueroomelectronics	Well the above program blinks the RA7 LED, about once a second. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

8th June 2008, 10:55 PM	#23
Hank Fletcher	Argh! That's still not working for me. Is this suppose to be making PortA.1 flash (so pin 18 of the IC)? The only configuration bit I changed was the internal oscillator as RB6.

8th June 2008, 10:59 PM	#24
blueroomelectronics	No PORTA.7 pin 16 Many A ports are A/D or have comparators that have to be disabled, A7 is a digital I/O pin by default. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

8th June 2008, 11:47 PM	#26
blueroomelectronics	My code. What sort of programmer are you using? __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

9th June 2008, 02:47 AM	#29
Hank Fletcher	Still nothing. Once I've saved the .asm, how do I get the .hex file? I've been going to file>export, then leaving the options as they are, and then saving as a .hex file. Then I import the .hex file. Is that right?

9th June 2008, 03:00 AM	#30
blueroomelectronics	It would help if we knew the programmer / software you're using. Some do not import the config fuses properly. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/