Picomite and AD9833 (SigGenerator)

Author Message
redtif
Newbie

Joined: 15/06/2022
Location: Germany
Posts: 7
Posted: 08:45am 17 Jun 2022      

@ matherp

Thanks, this worked with AD9833. I've still some more problem with the breakoutboard. There is no output after the opamp. Directly from the AD9833 it's ok.
I will investigate.

  matherp said  The Pico SDK doesn't appear to set the clock up until the first use of the bus. The workaround is to do a dummy transaction with CS high before you first use it for real

e.g.


setpin cspin,dout
pin(cspin)=1
setpin 4,5,6,spi
spi open 1000000,3,8
spi write 1,0
'
' now the clock will be high
'


I found one more different behavior at the pin init.

' setup the output pins
Pin(CS) = 1
SetPin CS, dout
Pin(FSY) = 1
SetPin FSY, dout
Pin(TrigPin) = 0
SetPin TrigPin, DOUT


This doesn't work. The pin for FSY is again low after the SETPIN!
After some testing I commented out the SETPIN. It's not needed in this case!


Thanks for your support!

If I got it working on the Picomite, I will post the adapted code here.

Rgds