AT90USB162 Microcontroller
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Simple USB programmable micro.
SPI The AT90 needs to create a SPI interface
to communicate with the AD9951 DDS chip.
The AT90 will initialize the chip and then set the oscillation
frequency. The software for this was found
on the Atmel AVR freak’s website. LCD Display The
LCD display is a 2 x 16 standard display.
The software for this was also found on an Atmel programmer’s website. Rotary Encoder The rotary encoder is a cheap
alternative to the large rotary VFO knobs found on HF rigs. This part has 2 output pins which need to
be monitored by the AT90 in order to determine the direction of rotation and
the number of turns made.
Misc IO IO |
