calibration clock 12f508

**volcane** · - 4th December 2006, 06:50

hi!

f I want to use the inside (12F508) clock all it takes is writing the lace
@ device pic12F508, intrc_osc, MCLR_OFF,WDT_OFF,PROTECT_OFF
@ movwf OSCCAL must other be added? do you make me some example?

**Acetronics2** · - 4th December 2006, 09:01

Just have a look to the firsts manual pages ... there's a dedicated DEFINE !!!

Alain

**volcane** · - 4th December 2006, 09:21

Hi!

I wanted to only know if the compiler produces the code or must use of the directives in assembler?

I must read the datasheet of the 12f508 or I must read the handbook of compiler PICBASIC PRO?

**Acetronics2** · - 4th December 2006, 09:33

The minimum You HAVE to read is ... BOTH ...

A look to Microchip Assembler is not too much nor, if used !!!

...

**volcane** · - 4th December 2006, 10:47

hi!

ok, the forum because exists?

skimask · - 4th December 2006, 14:13

Originally Posted by volcane

hi!

ok, the forum because exists?

To help a person who, after exhausting other options such as reading the datasheets or the manuals, or after doing a number of tests, try, experiments, etc. is just plain stuck and needs a nudge to figure out a problem.
Doesn't look to me like you've done any of the above...
JDG

**volcane** · - 4th December 2006, 15:37

Hi!

you have reason perfectly,but you before did not make to write the solution?

that is:@ MOVWF OSCCAL

**Bruce** · - 4th December 2006, 16:26

PBP handles this for you. It's very easy to verify.

Compile this for a 12F508;

Code:

Main:
    HIGH 0
    pause 500
    low 0
    pause 500
    goto Main

    End

Now simply open the .LST file, and look for it.

ORG 0 ; Start at 0
movwf OSCCAL ; Set oscillator calibration

Look in your PBP manual, section 2.5.1, PICmicro MCU Specific Issues.

**volcane** · - 4th December 2006, 19:03

Hi!

thanks, this is the example of like is answered to the forum

**Archangel** · - 4th December 2006, 23:06

Originally Posted by Bruce

PBP handles this for you. It's very easy to verify.

Now simply open the .LST file, and look for it.

Hi Bruce,
My Gosh!
I never opened a .lst file before, I opened one, from one of my simple programs which just outputs serial strings at 4 different baud rates to test serial inputs, and wow over 32000 lines of code! What really is astounding is that the pic can process it all so fast.
JS

**mister_e** · - 4th December 2006, 23:13

Yup but you'll notice many IF/IFDEF/IFNDEF wich are not process by the PIC but by the assembler. if you want to have something a little smaller, open the .asm file. on a 18F452 the single line...

Code:

hserout ["hello"]

will produce

Code:

; PICBASIC PRO(TM) Compiler 2.47, (c) 1998, 2006 microEngineering Labs, Inc. All Rights Reserved.  
_USED			EQU	1

	INCLUDE	"C:\PBP\18F452.INC"

RAM_START       		EQU	00000h
RAM_END         		EQU	005FFh
RAM_BANKS       		EQU	00006h
BANK0_START     		EQU	00080h
BANK0_END       		EQU	000FFh
BANK1_START     		EQU	00100h
BANK1_END       		EQU	001FFh
BANK2_START     		EQU	00200h
BANK2_END       		EQU	002FFh
BANK3_START     		EQU	00300h
BANK3_END       		EQU	003FFh
BANK4_START     		EQU	00400h
BANK4_END       		EQU	004FFh
BANK5_START     		EQU	00500h
BANK5_END       		EQU	005FFh
BANKA_START     		EQU	00000h
BANKA_END       		EQU	0007Fh

; C:\PBP\PBPPIC18.RAM      	00028	FLAGS   VAR     BYTE BANKA SYSTEM       ' Static flags
FLAGS           		EQU	RAM_START + 000h
; C:\PBP\PBPPIC18.RAM      	00012	R0      VAR     WORD BANKA SYSTEM       ' System Register
R0              		EQU	RAM_START + 001h
; C:\PBP\PBPPIC18.RAM      	00013	R1      VAR     WORD BANKA SYSTEM       ' System Register
R1              		EQU	RAM_START + 003h
; C:\PBP\PBPPIC18.RAM      	00014	R2      VAR     WORD BANKA SYSTEM       ' System Register
R2              		EQU	RAM_START + 005h
; C:\PBP\PBPPIC18.RAM      	00015	R3      VAR     WORD BANKA SYSTEM       ' System Register
R3              		EQU	RAM_START + 007h
; C:\PBP\PBPPIC18.RAM      	00016	R4      VAR     WORD BANKA SYSTEM       ' System Register
R4              		EQU	RAM_START + 009h
; C:\PBP\PBPPIC18.RAM      	00017	R5      VAR     WORD BANKA SYSTEM       ' System Register
R5              		EQU	RAM_START + 00Bh
; C:\PBP\PBPPIC18.RAM      	00018	R6      VAR     WORD BANKA SYSTEM       ' System Register
R6              		EQU	RAM_START + 00Dh
; C:\PBP\PBPPIC18.RAM      	00019	R7      VAR     WORD BANKA SYSTEM       ' System Register
R7              		EQU	RAM_START + 00Fh
; C:\PBP\PBPPIC18.RAM      	00020	R8      VAR     WORD BANKA SYSTEM       ' System Register
R8              		EQU	RAM_START + 011h
; C:\PBP\PBPPIC18.RAM      	00027	GOP     VAR     BYTE BANKA SYSTEM       ' Gen Op Parameter
GOP             		EQU	RAM_START + 013h
; C:\PBP\PBPPIC18.RAM      	00023	RM1     VAR     BYTE BANKA SYSTEM       ' Pin 1 Mask
RM1             		EQU	RAM_START + 014h
; C:\PBP\PBPPIC18.RAM      	00026	RM2     VAR     BYTE BANKA SYSTEM       ' Pin 2 Mask
RM2             		EQU	RAM_START + 015h
; C:\PBP\PBPPIC18.RAM      	00021	RR1     VAR     BYTE BANKA SYSTEM       ' Pin 1 Register
RR1             		EQU	RAM_START + 016h
; C:\PBP\PBPPIC18.RAM      	00024	RR2     VAR     BYTE BANKA SYSTEM       ' Pin 2 Register
RR2             		EQU	RAM_START + 017h
; C:\PBP\PBPPIC18.RAM      	00022	RS1     VAR     BYTE BANKA SYSTEM       ' Pin 1 Bank
RS1             		EQU	RAM_START + 018h
; C:\PBP\PBPPIC18.RAM      	00025	RS2     VAR     BYTE BANKA SYSTEM       ' Pin 2 Bank
RS2             		EQU	RAM_START + 019h
; C:\PBP\18F452.BAS        	00024	PORTL   VAR     PORTB
_PORTL           		EQU	 PORTB
; C:\PBP\18F452.BAS        	00025	PORTH   VAR     PORTC
_PORTH           		EQU	 PORTC
; C:\PBP\18F452.BAS        	00026	TRISL   VAR     TRISB
_TRISL           		EQU	 TRISB
; C:\PBP\18F452.BAS        	00027	TRISH   VAR     TRISC
_TRISH           		EQU	 TRISC

; EEPROM data.


	INCLUDE	"A.MAC"
	INCLUDE	"C:\PBP\PBPPIC18.LIB"


; C:\PBP\18F452.BAS        	00012	BANKA   $0000, $007F
; C:\PBP\18F452.BAS        	00013	BANK0   $0080, $00FF
; C:\PBP\18F452.BAS        	00014	BANK1   $0100, $01FF
; C:\PBP\18F452.BAS        	00015	BANK2   $0200, $02FF
; C:\PBP\18F452.BAS        	00016	BANK3   $0300, $03FF
; C:\PBP\18F452.BAS        	00017	BANK4   $0400, $04FF
; C:\PBP\18F452.BAS        	00018	BANK5   $0500, $05FF
; C:\PBP\18F452.BAS        	00020	LIBRARY "PBPPIC18"

; C:\PBP\18F452.BAS        	00022	        include "PIC18EXT.BAS"

; C:\PBP\18F452.BAS        	00029	        include "PBPPIC18.RAM"

; C:\PBP_PROG\A.BAS        	00001	       hserout ["hello"]
	HSEROUT?C	068h
	HSEROUT?C	065h
	HSEROUT?C	06Ch
	HSEROUT?C	06Ch
	HSEROUT?C	06Fh

	END

the interesting stuff is HSEROUT?C. now open the .MAC file, it produce...

Code:

	NOLIST
; PICBASIC PRO(TM) Compiler 2.47, (c) 1998, 2006 microEngineering Labs, Inc. All Rights Reserved.  

HSEROUT?C macro Cin
        MOVE?CA Cin
        L?CALL  HSEROUT
    endm
HSEROUT_USED = 1


	LIST

so you know that it store each character (C) in Wreg(A), and then call the HSEROUT sub.

**SteveB** · - 5th December 2006, 01:37

Joe, not all of what you see is executed by the PIC (really only a small portion). Here is a snippet of a .lst file. Only what is highlighted in RED are actual lines of code which find there way into the PIC:

Code:

  00000032            00472 _timeloopconst                  EQU     00032h
  00000064            00473 _timeloopMAX                    EQU     00064h
                      00474         INCLUDE "MAIN_4.MAC"
                      00001 
                      01236         LIST
                      00475         INCLUDE "C:\PBP\PBPPIC18.LIB"
                      00001 ;******************************************************************
                      00002 ;*  PBPPIC18.LIB                                                  *
                      00003 ;*                                                                *
                      00004 ;*  By        : Leonard Zerman, Jeff Schmoyer                     *
                      00005 ;*  Notice    : Copyright (c) 2005 microEngineering Labs, Inc.    *
                      00006 ;*              All Rights Reserved                               *
                      00007 ;*  Date      : 09/22/05                                          *
                      00008 ;*  Version   : 2.46a                                             *
                      00009 ;*  Notes     :                                                   *
                      00010 ;******************************************************************
                      00124   LIST
                      00125 ; Oscillator is 40MHz
                      01131   LIST
000000                01132     ORG RESET_ORG               ; Reset vector at 0
                      01136   LIST
000000 6A1C           01137         clrf    FLAGS           ; Clear all flags on reset
                      01141   LIST
000002 EF4A F002      01142         goto    INIT            ; Finish initialization
                      01152   LIST
000008                01153     ORG RESET_ORG + 8           ; High priority interrupt vector at 8

000008 EF69 F002      01154         goto    INTHAND         ; Goto high priority user interrupt handler
                      01166   LIST
000018                01167     ORG RESET_ORG + 18h         ; Low priority interrupt vector at 18h
000018 EF8F F002      01168         goto    INTLHAND        ; Goto low priority user interrupt handler
                      02164   LIST
00001C 50E9           02165 HSEROUTJ movf   FSR0L, W        ; Jumpman entry
                      02171   LIST
00001E                02172 HSEROUT
                      02173         CLRWDT?                 ; Keep Watchdog clear
                          M     ifndef NO_CLRWDT
00001E 0004               M         clrwdt
                          M     endif
000020 A89E           02174         btfss   PIR, TXIF       ; Wait till ready
000022 D7FD           02175         bra     HSEROUT
                      02176 
                      02177      ifdef HSERPARITY_USED
                      02178           if (HSER_BITS != 9)
                      02179         andlw   7fh             ; Clear top bit
                      02180         rcall   HSERPARITY      ; Calculate the parity
                      02181             ifdef HSER_ODD
                      02182         btfss   GOP, 0
                      02183             else
                      02184         btfsc   GOP, 0
                      02185             endif
                      02186         iorlw   80h             ; Set parity
                      02187           else
                      02188         rcall   HSERPARITY      ; Calculate the parity
                      02189         bcf     TXSTA, TX9D     ; Start parity at 0
                      02190             ifdef HSER_ODD
                      02191         btfss   GOP, 0
                      02192             else
                      02193         btfsc   GOP, 0
                      02194             endif
                      02195         bsf     TXSTA, TX9D     ; Set parity in 9th bit
                      02196           endif
                      02197       endif
                      02198 
000024 6EAD           02199         movwf   TXREG           ; Send the char
000026 80D8           02200         bsf     STATUS, C       ; Set no timeout for Serout2mod
000028 EF47 F002      02201         goto    DUNN            ; That's it

The other colors are:
BLUE = Declarations, processed by assembler
ORANGE= Assembler commands, directives, macros
GREEN = Comments
PURPLE= Labels

Also, here is a little legend for the lines of code:

Code:

 PIC   Commands        ASM             Commands			
line#  in HEX         line#             in ASM        .        
000024 6EAD           02199         movwf   TXREG           ; Send the char
000026 80D8           02200         bsf     STATUS, C       ; Set no timeout for Serout2mod
000028 EF47 F002      02201         goto    DUNN            ; That's it

EDIT: Maybe some better discriptors:
   PIC line# = ADDRESS in PIC program memory
   Commands in HEX = PIC Object Code (or OPCODE or Instruction)
   Commands in ASM = Source Code

Hope this helps you in your understanding of what goes on "under the hood"

SteveB

**sayzer** · - 5th December 2006, 09:46

Nice example SteveB, a kind of tutorial.

Helpful in understanding indeed.

---------------------

**Archangel** · - 5th December 2006, 10:33

Originally Posted by SteveB

Joe, not all of what you see is executed by the PIC (really only a small portion). Here is a snippet of a .lst file. Only what is highlighted in RED are actual lines of code which find there way into the PIC:

Code:

  00000032            00472 _timeloopconst                  EQU     00032h
  00000064            00473 _timeloopMAX                    EQU     00064h
                      00474         INCLUDE "MAIN_4.MAC"
                      00001 
                      01236         LIST
                      00475         INCLUDE "C:\PBP\PBPPIC18.LIB"
                      00001 ;******************************************************************
                      00002 ;*  PBPPIC18.LIB                                                  *
                      00003 ;*                                                                *
                      00004 ;*  By        : Leonard Zerman, Jeff Schmoyer                     *
                      00005 ;*  Notice    : Copyright (c) 2005 microEngineering Labs, Inc.    *
                      00006 ;*              All Rights Reserved                               *
                      00007 ;*  Date      : 09/22/05                                          *
                      00008 ;*  Version   : 2.46a                                             *
                      00009 ;*  Notes     :                                                   *
                      00010 ;******************************************************************
                      00124   LIST
                      00125 ; Oscillator is 40MHz
                      01131   LIST
000000                01132     ORG RESET_ORG               ; Reset vector at 0
                      01136   LIST
000000 6A1C           01137         clrf    FLAGS           ; Clear all flags on reset
                      01141   LIST
000002 EF4A F002      01142         goto    INIT            ; Finish initialization
                      01152   LIST
000008                01153     ORG RESET_ORG + 8           ; High priority interrupt vector at 8

000008 EF69 F002      01154         goto    INTHAND         ; Goto high priority user interrupt handler
                      01166   LIST
000018                01167     ORG RESET_ORG + 18h         ; Low priority interrupt vector at 18h
000018 EF8F F002      01168         goto    INTLHAND        ; Goto low priority user interrupt handler
                      02164   LIST
00001C 50E9           02165 HSEROUTJ movf   FSR0L, W        ; Jumpman entry
                      02171   LIST
00001E                02172 HSEROUT
                      02173         CLRWDT?                 ; Keep Watchdog clear
                          M     ifndef NO_CLRWDT
00001E 0004               M         clrwdt
                          M     endif
000020 A89E           02174         btfss   PIR, TXIF       ; Wait till ready
000022 D7FD           02175         bra     HSEROUT
                      02176 
                      02177      ifdef HSERPARITY_USED
                      02178           if (HSER_BITS != 9)
                      02179         andlw   7fh             ; Clear top bit
                      02180         rcall   HSERPARITY      ; Calculate the parity
                      02181             ifdef HSER_ODD
                      02182         btfss   GOP, 0
                      02183             else
                      02184         btfsc   GOP, 0
                      02185             endif
                      02186         iorlw   80h             ; Set parity
                      02187           else
                      02188         rcall   HSERPARITY      ; Calculate the parity
                      02189         bcf     TXSTA, TX9D     ; Start parity at 0
                      02190             ifdef HSER_ODD
                      02191         btfss   GOP, 0
                      02192             else
                      02193         btfsc   GOP, 0
                      02194             endif
                      02195         bsf     TXSTA, TX9D     ; Set parity in 9th bit
                      02196           endif
                      02197       endif
                      02198 
000024 6EAD           02199         movwf   TXREG           ; Send the char
000026 80D8           02200         bsf     STATUS, C       ; Set no timeout for Serout2mod
000028 EF47 F002      02201         goto    DUNN            ; That's it

The other colors are:
BLUE = Declarations, processed by assembler
ORANGE= Assembler commands, directives, macros
GREEN = Comments
PURPLE= Labels

Also, here is a little legend for the lines of code:

Code:

 PIC   Commands        ASM             Commands			
line#  in HEX         line#             in ASM        .        
000024 6EAD           02199         movwf   TXREG           ; Send the char
000026 80D8           02200         bsf     STATUS, C       ; Set no timeout for Serout2mod
000028 EF47 F002      02201         goto    DUNN            ; That's it

EDIT: Maybe some better discriptors:
   PIC line# = ADDRESS in PIC program memory
   Commands in HEX = PIC Object Code (or OPCODE or Instruction)
   Commands in ASM = Source Code

Hope this helps you in your understanding of what goes on "under the hood"

SteveB

Thanks Steve,
It does a little, sorta like explaining fuel injection and closed loop control to your wife

ugh meaning absolutly no disrespect to the female gender whom I have always suspected were smarter than we, but I get this much: only a small portion of that code goes in the hex file and the rest controls the assembler / linker etc. Maybe your post should go into the code examples area or perhaps a new area . . . tutorials ?
JS

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