Simple Debug object

Unsoundcode

I am finding the Prop easy to get into and see it has potential for complexity beyond my scope. Because I find it easy I enjoy and because I enjoy I learn faster.
I am at a small hurdle at the moment using the SimpleDebug object in conjunction with the FullDuplex object on a USB Propstick. This is my code that interfaces with the serial objects

obj port:"SimpleDebug"
PUB main
port.start(4800)
repeat
· port.dec(1)
· waitcnt(6_000_000+cnt)
port.stop

The values I see at the terminal are 0=144 , 1=145 , 2=146 etc etc so the values are incrementing by one but not what I would expect.·Are there any ideas on what I am doing wrong.

I have seen other serial objects in the object exchange and will be trying them soon I wanted to get by this one first.

thanks

Jeff T.

deSilva

What is your crystal setting?

Unsoundcode

Hi deSilva, the Propstick has a 5MHz crystal in it's socket, in the code I never specified clock or crystal.

thanks

Jeff T.

deSilva

Oh, dear! So your Propeller is running from the internal RC clock, which allows no defined bit rate. It is close to a miracle that you receive anything at all.
So please state your crystal and - for 4800 baud - a clockrate of at least 20 MHz (but 80 Mhz would be better of course).

Also change the wait time: It is best to derive it from the internal variable CLKFRQ which comes to one second.

I am sure it will work immediately.

CON
  _CLKMODE = XTAL1 + PLL16X     ' or PLL8X if you want it to run @ power saving 40MHz
  _XINFREQ = 5_000_000

Post Edited (deSilva) : 10/25/2007 5:42:25 PM GMT

Unsoundcode

Hi deSilva, you were absolutely correct , it did work immediately and I thank you.

Jeff T.