Design a reciever with R820t.

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h.shahbodaghkhan
Posts: 2
Joined: Mon Feb 17, 2020 7:20 pm

Design a reciever with R820t.

Post by h.shahbodaghkhan » Mon Feb 17, 2020 7:31 pm

Hello guys.
I'm trying to design a receiver with R820t and AVR Atmega8 .
I want to give a frequency to the micro and the micro make the R820t lock on the given frequency.

I don't know how to control the I2C registers to make the IC lock on the given frequency.

thank you for you help...

If any of you have a BOM of this subject I'm very appreciate to take it.

rtlsdrblog
Site Admin
Posts: 2816
Joined: Mon Nov 19, 2012 11:54 pm

Re: Design a reciever with R820t.

Post by rtlsdrblog » Tue Feb 18, 2020 12:03 pm

What component is processing the RF output?

Best to look at the RTL-SDR driver code for the I2C implementation, that it is the best documentation you'll find.

LB6MI
Posts: 5
Joined: Tue Sep 08, 2020 8:31 pm

Re: Design a reciever with R820t.

Post by LB6MI » Tue Sep 08, 2020 10:00 pm

Check the airspy firmware, they actually have a driver:

https://github.com/airspy/airspyone_fir ... ter/common

You may have to do some rewrite to get it useable.

The Atmega8 is too slow to deal with the IF signal from the tuner, but the setup/configration should be doable.

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