Feature Request: Add toggle for v3 dongle sw controlled bias-t

unixpunk commented 6 years ago

Hi, would be a cool feature to be able to use v3 sw controlled bias-t. https://github.com/rtlsdrblog/rtl_biast/blob/master/src/rtl_biast.c Happy to test! Thanks!

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Soapy SDR -- the SDR abstraction library

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Probe device driver=rtlsdr Found Rafael Micro R820T tuner Found Rafael Micro R820T tuner

-- Device identification

driver=RTLSDR hardware=RTLSDR origin=https://github.com/pothosware/SoapyRTLSDR rtl=0

-- Peripheral summary

Channels: 1 Rx, 0 Tx Timestamps: NO Other Settings:

Direct Sampling - RTL-SDR Direct Sampling Mode [key=direct_samp, default=0, type=string, options=(0, 1, 2)]
Offset Tune - RTL-SDR Offset Tuning Mode [key=offset_tune, default=false, type=bool]
I/Q Swap - RTL-SDR I/Q Swap Mode [key=iq_swap, default=false, type=bool]

-- RX Channel 0

Full-duplex: YES Supports AGC: YES Stream formats: CS8, CS16, CF32 Native format: CS8 [full-scale=128] Stream args:

Buffer Size - Number of bytes per buffer, multiples of 512 only. [key=bufflen, units=bytes, default=262144, type=int]
Ring buffers - Number of buffers in the ring. [key=buffers, units=buffers, default=15, type=int]
Async buffers - Number of async usb buffers (advanced). [key=asyncBuffs, units=buffers, default=0, type=int] Antennas: RX Full gain range: [0, 49.6] dB TUNER gain range: [0, 49.6] dB Full freq range: [23.999, 1764] MHz RF freq range: [24, 1764] MHz CORR freq range: [-0.001, 0.001] MHz Sample rates: 0.25, 1.024, 1.536, 1.792, 1.92, 2.048, 2.16, 2.56, 2.88, 3.2 MSps

jketterl commented 4 years ago

I'm probably not the best guy to do this, but I still tried: https://github.com/jketterl/SoapyRTLSDR/tree/biastee_support

I don't even dare to open a pull request since I'm unable to test it. Is there somebody that could confirm that it's working?

zuckschwerdt commented 4 years ago

@jketterl your code looks good. Do open a PR :)

SoapyAirspy calls this "biastee", and SoapySDRPlay calls it "biasT_ctrl" perhaps we could use one of those name to help apps discover this setting. (Though "bias_tee" would have been a better name, in my opinion…)

Would be great if somebody with this mod could test.

jketterl commented 4 years ago

You're right, it's not really helpful to introduce a third key. I'll change it to the airspy way, simply because it's easier to read.

jketterl commented 4 years ago

just went through some old notifications... since the PR is merged, this should be resolved now, too, shouldn't it?

pothosware / SoapyRTLSDR