Problem in Tension/compression

[Darrel Taylor]

Just posting this for an email notification that I changed the program above.

In case you're already trying it.
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[precision]

Just posting this for an email notification that I changed the program above.

In case you're already trying it.
<br>

Sir Darrel Taylor
Thanks
Peak-hold now working well for both side.
But my problem is , i want to counting down side 0 to 1 ,2 , 3 ......... ( not 65535, 65534 , 65533 .......)


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[Darrel Taylor]

You might want to just try the whole program I posted, instead of making the changes to yours. Because I think you've missed something.

With the SDEC modifier in the lcdout statements, it will read -1, -2, -3 etc. And will never show 65535.

There are several other subtle changes too.
<DT>

[precision]

Thanks it is work on lcd.
but on 7 seg. LED display , it is not work in +/- ,
this is my code

; CHIP 18F4550

DEFINE OSC 20
INCLUDE "MODEDEFS.BAS"
CMCON = 7
ADCON1 = 15
CVRCON = %00000000 'CVref turned off

TRISE = %000 
TRISA = 11111
TRISB = %11111111
TRISC = %11111111
TRISD = %11111111


Symbol HC_latch = PORTE.2   
symbol HC_Data = PORTE.1   
SYMBOL HC_Clk = PORTE.0   

B1 VAR BYTE
B2 VAR BYTE                         
B3 VAR BYTE
B4 VAR BYTE
B5 VAR BYTE
B6 VAR WORD

W0 VAR WORD
w3 var word
DUMMY VAR WORD

DIGIT1 VAR BYTE
DIGIT2 VAR BYTE
DIGIT3 VAR BYTE
DIGIT4 VAR BYTE
DIGIT5 VAR BYTE
DIGIT6 VAR BYTE

W1 VAR WORD
MASK VAR WORD
 
LastW0 VAR WORD

B1 = 0
B2 = 0
B3 = 0
B4 = 0
B5 = 0
W1 = 0
W0 = 0
w3 = 0
E1 VAR BYTE
E2 VAR BYTE
E3 VAR BYTE
E4 VAR BYTE
E5 VAR BYTE

PAUSE 500                           
'-------------------------------------------------------------------------
INCLUDE "DT_INTS-18.bas"     ; Base Interrupt System
INCLUDE "ReEnterPBP-18.bas"     ; Include if using PBP interrupts
ASM
INT_LIST  macro    ; IntSource,        Label,  Type, ResetFlag?
        INT_Handler    INT0_INT,  _ToggleLED1,   PBP,  yes                
    endm
    INT_CREATE               ; Creates the interrupt processor
ENDASM

@   INT_ENABLE   INT0_INT     ; enable external (INT) interrupts@   INT_ENABLE   INT1_INT     ; enable external (INT) interrupts

'-------------------------------------------------------------------------


LOOP:   
         IF W0 <> LastW0 then
         LastW0 = W0                  
         if ABS(LastW0) > ABS(w3) then w3 = LastW0

          
        B1 = LastW0 DIG 0    
        B2 = LastW0 DIG 1
        B3 = LastW0 DIG 2
        B4 = LastW0 DIG 3
        B5 = LastW0 DIG 4
  
  
        '------------------------------------------        
          DIGIT1 = B1 
        LOOKUP DIGIT1,[$C0,$F9,$A4,$B0,$99,$92,$82,$F8,$80,$90],MASK        
        E1 = MASK
        '------------------------------------------
        DIGIT2 = B2 
        LOOKUP DIGIT2,[$C0,$F9,$A4,$B0,$99,$92,$82,$F8,$80,$90],MASK        
        E2 = MASK       
        '-------------------------------------------
         DIGIT3 = B3 
        LOOKUP DIGIT3,[$C0,$F9,$A4,$B0,$99,$92,$82,$F8,$80,$90],MASK        
        E3 = MASK     
        '----------------------------------------
         DIGIT4 = B4 
        LOOKUP DIGIT4,[$C0,$F9,$A4,$B0,$99,$92,$82,$F8,$80,$90],MASK        
        E4 = MASK
        '---------------------------------------
        DIGIT5 = B5 
        LOOKUP DIGIT5,[$C0,$F9,$A4,$B0,$99,$92,$82,$F8,$80,$90],MASK        
        E5 = MASK 
        '---------------------------------------
        
         HC_Latch=0
        shiftout HC_data, HC_Clk, MSBFIRST,[E1,E2,E3,E4,E5,$C0]        
        pauseus 1
        HC_Latch=1
                
        '---------------------------------------
        endif   
         GOTO LOOP
         
ToggleLED1: if PORTB.1 = 0 THEN
              W0 = W0 + 1
               ELSE 
              W0 = W0 - 1
             ENDIF
        @ INT_RETURN

[Darrel Taylor]

Oi vey!
Where'd the 7-segment come from?

Oh well.

        B1 = ABS(LastW0) DIG 0    
        B2 = ABS(LastW0) DIG 1
        B3 = ABS(LastW0) DIG 2
        B4 = ABS(LastW0) DIG 3
        B5 = ABS(LastW0) DIG 4

- or -

        W4 = ABS(LastW0)
        B1 = W4 DIG 0    
        B2 = W4 DIG 1
        B3 = W4 DIG 2
        B4 = W4 DIG 3
        B5 = W4 DIG 4

<br>

[precision]

Oh..Thanks Sir Darrel Taylor.

working fine now. but how i show "-" sign for tension measurements.

One thing more , just for information.

my encoder is 1000 PPR
CHIP 18F4550
XTAL mount 20 mhz

__CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H
DEFINE OSC 20

I lose the count in > 5 RPM with above code.

And if mount XTAL 20 mhz
and if i code

__CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H
DEFINE OSC 3

this is work up to 20 RPM. No counts lose.
Is DEFINE OSC 3 will increase the speed of PIC ?

.

[Darrel Taylor]

18F4550
20Mhz crystal (22pF caps)

Use ...

@   __CONFIG    _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
@   __CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H
DEFINE OSC 48

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