toggle quoted messageShow quoted text
It may be worth searching for some AD9850 code. That has an SPI
interface which is usually implemented using a 'bit banging'
technique which is a hardware SPI (I think) rather than dedicated
The AD9850 is set on frequency using a 32-bit word
I probably have some Arduino code like that somewhere.
On 14/02/2021 22:12, Andy G4JNT wrote:
one like that once. I gave it a dedicated PIC interface that
read it as fast as possible and just chuck put what was needed
on serial stop-start line in my chosen format.
On Sun, 14 Feb 2021 at 22:09,
Robin Szemeti - G1YFG <robin@...
Oh, and the small compass modules .. I assume you mean
the 9 axis compass/gyro things? I've played extensively
with those on a project .. they are a bit "tricky", you
have to keep a hell of a rate up reading them, if you
don't read them often enough, they just lock up ... I had
one running on an Arduino being read by SPI, and it was
100% fine ... until I added a few functions reading a GPS
chip .. and it got upset when the micro spent too long
messing arounf with GPS messages and woudl just hang the
compass chip. it wasn't interrupt driven either, just a
On Sun, 14 Feb 2021 at
22:05, Robin Szemeti <robin@...
Plenty of Arduino stuff around, and you can
program an Arduino with a simple USB cable ... that's
the way I would go.
AD also do a
VHF/UHF version, somewhat cheaper.
I just want some
software that will allow me to specify a
number of bytes to be sent, then to allow me
to load up the bytes and send them.
interesting chip, SPI is well supported by
Arduinos or Pics so controlling it wouldn’t be
£500 each I think I will give it a miss for a
I wonder if
anyone knows if there is any software about
that can control a device connected via an
There are small
compass modules available that are SPI
controlled. Along with various PLL modules.
Devices has released a SPI controlled Filter
chip ADMV8818 which maybe useful for amateur
Robin Szemeti - G1YFG