ad985x

support for AD9851 DDS under amforth

This device could be used for direct digital synthesis of an RF signal from an AVR.

wiring

I connected all jumpers except the one closest to the LED.

Pro-Mini       AD9851
GND        --- GND
digital.11 --- D7
digital.10 --- W_CLK
digital.9  --- FQ_UD
digital.12 --- RESET
3.3v       --- Vcc

BusPirate      AD9851
ADC        --- OUT
GND        --- GND

usage

Examples are coming soon..

+ad9851      \ enable ad9851.
ad9851-sine  \ Generate a sine wave.
-ad9851      \ Turn it off.

I'm using a Bus Pirate as an oscilloscope. Real oscilloscopes are expensive!

todo

• A compiling word for creating new 40-bit update cells to send to the AD9851.
• A word that calculates the 4-byte frequency tuning cell given Hz.
• Port my Teensy 3.1 Simple-MSK modulator to this as an example.
• Maybe some other modulation schemes as well..

copying

amforth-ad985x is licensed under GPLv3 like amforth.

contact

I am Andreas Wagner and my email address is andreas.wagner@lowfatcomputing.org

Upstream URL: http://hub.darcs.net/pointfree/amforth-ad985x