Post by thread:[SX] SXB Square Wave

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Cenlasoft wrote:Hello, I have been trying Terry's sweep code with no luck. I am sure it me doing something wrong. I used a scope and an LCR circuit to see if I could get to resonance. If I use the interrupt without sweep at one frequency, it works.

Device SX28, Oschs2, Turbo, OptionX, StackX Freq 50_000_000 OutPin Pin RA.0 Output reload VAR BYTE Interrupt NOCODE OutPin =~ OutPin Returnint reload Program Start Start: FOR reload = 139 TO 111 STEP -1 PAUSE 1000 ' CHANGES SWEEP SPEED NEXT GOTO Start End I am trying to get resonance but the square wave produced is not accurate enough. Thanks for any hints. Cenlasoft ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=338356 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2009 (http://www.dotNetBB.com)

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

Can you post a schematic so we can see the circuit? I'm not clear by what you mean when you say "resonance". What do you want the output pin to do? What is your waveform period? (How much time do you want to see between two rising edges of your "outpin" waveform?) ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=338356#m338536 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2009 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:Cenlasoft, It is very possible that you don't have enough resoultion to get resonance. But with a 50MHz clock you can only vary the ON/OFF time by a minimum of 20nSec. Bean.

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