confusion with the CD74HC165 8 bit register

[falingtrea]

putting the PL low .. something like that ??

I would do this (and make sure the CE pin is pulled low always) :

TRISE = %11111100 	' Set PORTE to all input
            
Clock   var PORTE.0   'CP
Load    var PORTE.1   'PL
Data_1  var PORTE.2  'Q7  out
input1 var byte

low Load
             
Mainloop:

  high Load
  shiftin Data_1,Clock,0,[input1 \8]
  low Load

  lcdout $FE,1, "Shift in"
  lcdout $FE,$C0, dec2 input1
  pause 300
			
GOTO Mainloop
End

[lerameur]

Hi I just tried your program modification and it do not work. Also some people say here it should be high and you say it should always be low, this is confusing.

'/////////////////////////
'//  test program
'//	Using the PIC16F887
'/////////////////////////

'/////////////////////////
'// Define section //
'/////////////////////////
include "modedefs.bas"

OSCCON = %01110000 '8 Mhz
DEFINE OSC 8
ANSELH = 0


'/////////////////////////
'// LCD configuration //
'/////////////////////////

DEFINE LCD_DREG PORTB 	' Set LCD Data port
DEFINE LCD_DBIT 4 		' Set starting Data bit (0 or 4) if 4-bit bus  RB.4, RB.5, RB.6, RB.7
DEFINE LCD_RSREG PORTB 	' Set LCD Register Select port
DEFINE LCD_RSBIT 1 		' Set LCD Register Select bit
DEFINE LCD_EREG PORTB	' Set LCD Enable port
DEFINE LCD_EBIT 0 		' Set LCD Enable bit
DEFINE LCD_BITS 4 		' Set LCD bus size (4 or 8 bits) '4 therefore put wire at 4, 5, 6 and 7 of LCD
DEFINE LCD_LINES 2 		' Set number of lines on LCD
DEFINE LCD_COMMANDUS 2500
DEFINE LCD_DATAUS 250
DEFINE CHAR_PACING 2000
pause 500


TRISE = %11111100 	' Set PORTE to all input
            
Clock   var PORTE.0   'CP
Load    var PORTE.1   'PL
Data_1  var PORTE.2  'Q7  out
input1 var byte

low Load
             
Mainloop:

  high Load
  shiftin Data_1,Clock,0,[input1 \8]
  low Load

  lcdout $FE,1, "Shift in"
  lcdout $FE,$C0, dec2 input1
  pause 300
			
GOTO Mainloop
End

[lerameur]

Hum, I tried pretty much every combination with High, Low PL, Pauses, whatever I could think about. Change HC165, maybe it could be defect. Nothing, still showing Zero as my output.

K

[mackrackit]

Can you post a schematic?

[lerameur]

Hi Dave, I can do that, maybe tomorrow, Its only using three ports in my Pic16F887, how hard can it be. I tried to switch to PORTD:
Clock var PORTD.0 'CP
Load var PORTD.1 'PL
Data_1 var PORTD.2 'Q7 out
But no luck either Maybe the CD4014BE will be easier ??

ken

[mackrackit]

How is the shift register connected? Inputs pulled high/low, power,etc.

[lerameur]

well pin 16 is on 5V
pin 1 in D1
Pin 2 in D0
pin 9 is the data
8 in ground CE is ground, and the other 8 input pin some I have on 5v and some on ground .

K