In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Professorwiz wrote:

Hello, I've been using PBasic and have just been going though my programs making them work with the SX, I've changed a simple one that flashes a couple led going though a transistor, and one just going though a 470ohm resistor.  The problem is I have 2 programs and one works and one doesn't and I can't see why the 1st doesn't.  My schematic is attached for the pin with the transistor.  Can anyone tell me what I'm overlooking?
 

Program 1:

 

' -------------------------------------------------------------------------
' Device Settings
' -------------------------------------------------------------------------

DEVICE          SX28, OSCHS3, TURBO, STACKX, OPTIONX
IRC_CAL  IRC_SLOW
FREQ            5_000_000
PROGRAM  start_point


' -------------------------------------------------------------------------
' IO Pins
' -------------------------------------------------------------------------

'pin0 to transistor and 3 leds

'pin1 to resistor and 1 led 

' -------------------------------------------------------------------------
' Variables
' -------------------------------------------------------------------------
ctn var byte

' -------------------------------------------------------------------------
TRIS_B=0
RB=0
 ' -------------------------------------------------------------------------
'            PROGRAM CODE
' -------------------------------------------------------------------------
start_point:
 for ctn =1 to 10
  RB=%00000000
  pause 100
  RB=%11111111
  pause 100
 next
 goto start_point

 

 

[b]Program #2[/b]
' =========================================================================
'
'   File...... TEMPLATE.SXB
'   Purpose... SX/B Programming Template
'   Author....  
'   E-mail....  
'   Started...
'   Updated...
'
' =========================================================================
' -------------------------------------------------------------------------
' Program Description
' -------------------------------------------------------------------------


' -------------------------------------------------------------------------
' Device Settings
' -------------------------------------------------------------------------

DEVICE          SX28, OSCHS3, TURBO, STACKX, OPTIONX
IRC_CAL  IRC_SLOW
FREQ            5_000_000
PROGRAM  start_point

' -------------------------------------------------------------------------
' IO Pins
' -------------------------------------------------------------------------
'Pin0 to transistor and 3leds
'Pin1 to resistor and 1 led
' Variables
' -------------------------------------------------------------------------
CNT VAR BYTE
spd var byte
' -------------------------------------------------------------------------
 ' INTERRUPT

' -------------------------------------------------------------------------
' Program Code
' -------------------------------------------------------------------------

start_point:
 spd = 10
 TRIS_B=0
 RB=0
 
FOR CNT = 1 TO 250
 RB=%01111110
PAUSE spd
 RB=%11111101
PAUSE spd
NEXT 
goto start_point

---------- End of Message ----------


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