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

Hi Bean,

Here is my code:

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

DEVICE          SX52, OSCXT2
FREQ            4_000_000
ID              "SX_MFG"


' -------------------------------------------------------------------------
' IO Pins
' -------------------------------------------------------------------------
PLL_IN	VAR	RB.6		' Clock for PLL input	
SQR_IN	VAR	RC.3		' Square wave input from wave form gen.
MUL_OUT	VAR	RC.2		' Multiplyer output for PLL
' -------------------------------------------------------------------------
' Constants
' -------------------------------------------------------------------------


' -------------------------------------------------------------------------
' Variables
' -------------------------------------------------------------------------


' -------------------------------------------------------------------------
  INTERRUPT
' -------------------------------------------------------------------------

ISR_Start:
  ' ISR code here

ISR_Exit:
  RETURNINT ' {cycles}                                 


' =========================================================================
  PROGRAM Start
' =========================================================================


' -------------------------------------------------------------------------
' Subroutine Declarations
' -------------------------------------------------------------------------


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

Start:
  ' initialization code here
TIMER1 	CLEAR
TIMER2 	CLEAR
OUTPUT	PLL_IN			' Set PLL_IN output
INPUT 	SQR_IN			' Set Square wave input
OUTPUT	MUL_OUT			' Set Multiplyer output
TIMER2 	EXTERNAL		                ' Set TIMER2 into external mode

Main:
  ' main code here
TIMER1 PWM,2000,4000		' Set 1kHz onto PLL_IN output
 	 			' Set 500Hz onto MUL_OUT
TIMER2 R2,1			' Set loop counter value 1			
TIMER2 R1,1			' Set loop counter value 1

END

It is very interesting, I got pulses on the RC.2 if I wait about 1 minutes. I got the 500Hz square wave on this output but it has a very stange slip after some periods. I checked the input singnal onto the RC.3 pin, it has no any slip. Can it be coding problem? Or my HW is bad?

I will attach the sreen shot of this 500Hz signal in a new topic.

Regards

Spiller

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


You can view the post on-line at:
http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=215089#m215232

Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com

The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)