How to make PWM to all the pins at the portB in same time on 16f628

[dejankengur]

How to make PWM to all the pins at the portB in same time on 16f628
or is there another command: for example, eight LEDs connected portb 0,1,2,3,4,5,6,7 to work with 50% at the same time.
At the same time to light and perish one by one with 100%.
but never to perish under 50%.

please help

[sayzer]

Use a 7408.

Connect one input of each "AND" to PWM output of F628A, all other inputs to your PORTB pins.

Whenever and whichever of your PORTB pin is high, you will get the same PWM output.

[Jerson]

This should give you ideas
http://www.picbasic.co.uk/forum/cont...-Modulation%29

[dejankengur]

Use a 7408.

Connect one input of each "AND" to PWM output of F628A, all other inputs to your PORTB pins.

Whenever and whichever of your PORTB pin is high, you will get the same PWM output.

CAN YOU tell me examples of how to do it

[sayzer]

This picture is from WEB.

[dejankengur]

http://picprojects.org.uk/projects/l...rpwm/index.htm
vivi this. In assembly language, I do not understand assembly,
Watch the clip 1.30 to 1.50 min. That I want to do but do not know how the PICBASIC PRO

[ScaleRobotics]

http://picprojects.org.uk/projects/l...rpwm/index.htm
vivi this. In assembly language, I do not understand assembly,
Watch the clip 1.30 to 1.50 min. That I want to do but do not know how the PICBASIC PRO

There are a lot of effects in that video. This will do the "scanner" part: http://www.picbasic.co.uk/forum/showthread.php?t=10564&p=70256#post70256

[dejankengur]

errors with 16f628
Fatal TEST.ASM 435 : [308] macro buffer overflow

;----[ MIBAM Setup ]--------------------------------------------------------
BAM_COUNT CON 8                     ; How many BAM Pins are used?
INCLUDE "MIBAM.pbp"                 ; Mirror Image BAM module

BAM_DUTY  VAR BYTE[BAM_COUNT]
  LED1    VAR BAM_DUTY[0]           ; group them in an array for easy access
  LED2    VAR BAM_DUTY[1]           ; with FOR loops etc.
  LED3    VAR BAM_DUTY[2] 
  LED4    VAR BAM_DUTY[3] 
  LED5    VAR BAM_DUTY[4] 
  LED6    VAR BAM_DUTY[5] 
  LED7    VAR BAM_DUTY[6] 
  LED8    VAR BAM_DUTY[7] 

ASM
BAM_LIST  macro                     ; Define PIN's to use for BAM
     BAM_PIN (PORTB,0, LED1)        ;   and the associated Duty variables
     BAM_PIN (PORTB,1, LED2)
     BAM_PIN (PORTB,2, LED3)
     BAM_PIN (PORTB,3, LED4)
     BAM_PIN (PORTB,4, LED5)
     BAM_PIN (PORTB,5, LED6)
     BAM_PIN (PORTB,6, LED7)
     BAM_PIN (PORTB,7, LED8)
  endm
  BAM_INIT  BAM_LIST                ; Initialize the Pins
ENDASM

Speed       CON 6         ; Smaller = Faster
TracerSpeed CON 15        ; Smaller = Faster Left/Right
Brightness  CON 200       ; Tracers DutyCycle
DrainSpeed  CON 30        ; Smaller = Shorter Trail

Idx         VAR BYTE
LoopCount   VAR BYTE
NextLED     VAR BYTE
TraceDIR    VAR BIT

  TraceDIR  = 0
  LoopCount = 0
  NextLED   = 0
    
Main:
    if LoopCount = TracerSpeed then             ; __[ Cylon/Kitt Scanner ]__
      LoopCount = 0
      BAM_DUTY(NextLED) = Brightness
      if TraceDIR then                          ; if scanning left
        NextLED = NextLED - 1
        if NextLED = 0 then TraceDIR = 0
      else                                      ; else scanning right
        NextLED = NextLED + 1
        if NextLED = BAM_COUNT-1 then TraceDIR = 1
      endif
    endif
    
    FOR Idx = 0 to BAM_COUNT - 1                ; Drain all dutycycles
       IF BAM_DUTY(Idx) > 0 then
           BAM_DUTY(Idx) = BAM_DUTY(Idx)*DrainSpeed/(DrainSpeed+1)
       ENDIF
    NEXT Idx
    pause Speed
    LoopCount = LoopCount + 1
GOTO Main

[ScaleRobotics]

errors with 16f628
Fatal TEST.ASM 435 : [308] macro buffer overflow

I did not get that error with your code, but I did need to add the stuff about wsave psave etc variables, which is explained in the mibam thread.

;____[ For 12F/16F only - Interrupt Context save locations]_________________
wsave       var byte    $20     SYSTEM  ' location for W if in bank0
;wsave       var byte    $70     SYSTEM  ' Alternate save location for W 
                                        ' if using $70, comment out wsave1-3
' --- IF any of these next three lines cause an error ?? -------------------
'       Comment them out to fix the problem ----
' -- The chip being used determines which variables are needed -------------
wsave1      VAR BYTE    $A0     SYSTEM      ' location for W if in bank1
wsave2      VAR BYTE    $120    SYSTEM      ' location for W if in bank2
'wsave3      VAR BYTE    $1A0    SYSTEM      ' location for W if in bank3
'---DO NOT change these-----------------------------------------------------
ssave       VAR BYTE    BANK0   SYSTEM      ' location for STATUS register
psave       VAR BYTE    BANK0   SYSTEM      ' location for PCLATH register

[Darrel Taylor]

The macro buffer overflow happens when you use PM for the assembler.

Use MPASM instead.

[dejankengur]

Thanks guys
But how to high with 2.5 volts all pins at PirtB in the same time.

[dejankengur]

Help help