Re: PIC16F628A Error: section '.org_0' can not fit the absolute section

I dont recognise that section .org_0

is it one you created ? what does it have in it ?

looks like its the start of your code, like the interrupt vector table, maybe it has the wrong attributes or something.

Colin =^.^=

I would need to see the rest of the code to see how you have it set up. You may have a problem with a relocatable section, or your code at origin 0 is overlapping an interrupt vector (usually located at 0x04 or 0x08).

If you use absolute addresses for code, you should use a jump instruction at ORG 0 to branch to another absolute location past the interrupt vectors.

Using relocatable code, do it like this:

; Data can be located in a specific address space, ; or leave off the address to allow the linker to locate it

group1 UDATA 0x80 a_data res 1 ;0x80 b_data res 1 c_data res 1

;****************** Reset vector ********************

; This code will start executing when a reset occurs. RST CODE 0x0000 goto Main ;go to start of main code

;**************************************************** ; The linker is forced to locate this code at the specified address

INTVEC CODE 0x0004 ; interrupt vector location goto Isr

;************** Interrupt Processing **************** ; This code can be relocated anywhere by the linker CODE Isr: movwf w_temp ; save off current W register contents movf STATUS,w ; move status register into W register movwf status_temp ; save off contents of STATUS register

; Do Interrupt processing EndIsr movf status_temp,w ; retrieve copy of STATUS register movwf STATUS ; restore pre-isr STATUS register contents swapf w_temp,f swapf w_temp,w ; restore pre-isr W register contents retfie ; return from interrupt

;************* Start of Program **************** Main ; Add your main code here ;************* End of Program **************** END

Hi Paul

My Code partly borrowed from others programming an 16F84A and part from MPLAB IDE V7.62 follows:

org 0x0000 ; Origin start address for 16f628 ;RESET_VECTOR CODE 0x0000 ; processor reset vector ********** ; goto Loop

; ****Disable the Comparitors using CMCON Register to make I/O Pins available for general use**** movlw 0x07 ; Place 07 in the w register movwf CMCON

Loop ; Label

; ************Setup Ports A & B ************ bsf STATUS, RP0 ; Set Status Bit=1 to select Bank 1 movlw b'00000000' ; Put Bin value into w register movwf TRISB ; Set Port B All as Outputs movwf TRISA ; Set Port A All as Outputs bcf STATUS, RP0 ; Set Status Bit=0 to select Bank 0 ; Main ; Start of program ay Label Main

; ********* Switching Port Pins HI = On ***************** movlw 0xff ; ff = 11111111 movwf PORTA ; Set all PORTA pins Outputs = Hi movlw PORTB ; Set all PORTB pins Outputs = Hi

; ***** Waist 2msecs to ensure ports go fully Hi and then use Delay Routine to keep Hi for a while ***** NOP ; 1 Microsec with 4MHz Osc NOP ; 1 Microsec with 4MHz Osc call Delay ; Increase On time

; ******* Switching All PORTA & PORTB pins 0 = Lo = Off

***************** movlw 0x00 ; 00 = 00000000 movwf PORTA ; Set all PORTA pins Outputs = Lo movlw PORTB ; Set all PORTA pins Outputs = Lo call Delay ; Increase Off time using delay subroutine

goto Loop ; Go back to loop label an do again

; For 250ms delay subroutine (4MHz Clock) Store values in variables (count1 = 250, count2 = 199, count3 = 1) Delay movlw d'250' ; Place decimal 250 into w register movwf count1 ; Store in count1 variable

dl movlw 0xC7 ; Place decimal 199 = Hex C7 into w register movwf count2 ; Store in count2 variable

movlw 0x01 ; Place decimal 1 = Hex 01 into w register movwf count3 ; Store in count3 variable

Delay_0 decfsz count2,f ; Decrement count2 (199) & skip next line if count2 = 0 goto $+2 ; Skip to 2 lines forward (goto d1) decfsz count3,f ; Decrement count3 goto Delay_0 ; Skip the next line if count3 = 0 decfsz count1,f ; Decrement count1 (250) & skip next line if count2 = 0 goto dl ; Go back to dl retlw 0x00 ; Return from subroutine with 0 in w register

end ; End of Program

Hi Colin

My Code partly borrowed from others programming an 16F84A and part from MPLAB IDE V7.62 follows:

org 0x0000 ; Origin start address for 16f628 ;RESET_VECTOR CODE 0x0000 ; processor reset vector ********** ; goto Loop

; ****Disable the Comparitors using CMCON Register to make I/O Pins available for general use**** movlw 0x07 ; Place 07 in the w register movwf CMCON

Loop ; Label

; ************Setup Ports A & B ************ bsf STATUS, RP0 ; Set Status Bit=1 to select Bank 1 movlw b'00000000' ; Put Bin value into w register movwf TRISB ; Set Port B All as Outputs movwf TRISA ; Set Port A All as Outputs bcf STATUS, RP0 ; Set Status Bit=0 to select Bank 0 ; Main ; Start of program ay Label Main

; ********* Switching Port Pins HI = On ***************** movlw 0xff ; ff = 11111111 movwf PORTA ; Set all PORTA pins Outputs = Hi movlw PORTB ; Set all PORTB pins Outputs = Hi

; ***** Waist 2msecs to ensure ports go fully Hi and then use Delay Routine to keep Hi for a while ***** NOP ; 1 Microsec with 4MHz Osc NOP ; 1 Microsec with 4MHz Osc call Delay ; Increase On time

; ******* Switching All PORTA & PORTB pins 0 = Lo = Off

***************** movlw 0x00 ; 00 = 00000000 movwf PORTA ; Set all PORTA pins Outputs = Lo movlw PORTB ; Set all PORTA pins Outputs = Lo call Delay ; Increase Off time using delay subroutine

goto Loop ; Go back to loop label an do again

; For 250ms delay subroutine (4MHz Clock) Store values in variables (count1 = 250, count2 = 199, count3 = 1) Delay movlw d'250' ; Place decimal 250 into w register movwf count1 ; Store in count1 variable

dl movlw 0xC7 ; Place decimal 199 = Hex C7 into w register movwf count2 ; Store in count2 variable

movlw 0x01 ; Place decimal 1 = Hex 01 into w register movwf count3 ; Store in count3 variable

Delay_0 decfsz count2,f ; Decrement count2 (199) & skip next line if count2 = 0 goto $+2 ; Skip to 2 lines forward (goto d1) decfsz count3,f ; Decrement count3 goto Delay_0 ; Skip the next line if count3 = 0 decfsz count1,f ; Decrement count1 (250) & skip next line if count2 = 0 goto dl ; Go back to dl retlw 0x00 ; Return from subroutine with 0 in w register

end ; End of Program

goto Main ;***** At reset, you should have a jump to Main, for initialization org 0x0020 Main: ;This will be your program entry point, past the interrupt table

Put your port initializations here

Loop: ;Here is where the loop should be located

See comments above. You might also check the settings on the IDE. I think you can switch from relocatable to absolute code which does not require the linker. Just some thoughts. Good luck,

Paul