Support for second RX channel?

[nategri]

I know the internal AD chipset permits a second RX channel---how difficult would it be to add support for this second channel? I have a Pluto+ (Chinese variant) with dual receive, and I was hoping to use the second channel in a calibration context with SoapyPower.

Any hints you could give would be much appreciated!

[zuckschwerdt]

Can you give a dump of iio_info (iio_info --scan)?

[nategri]

Sure thing---and let me know if this isn't what you were looking for:

pi@raspberrypi:~ $ iio_info --network 192.168.2.1
Library version: 0.16 (git tag: v0.16)
Compiled with backends: local xml ip usb serial
IIO context created with network backend.
Backend version: 0.21 (git tag: v0.21  )
Backend description string: 192.168.2.1 Linux (none) 4.19.0-g8e9fc41dc7db #25 SMP PREEMPT Mon Sep 28 09:16:27 CST 2020 armv7l
IIO context has 9 attributes:
	hw_model: Analog Devices PlutoSDR Rev.C (Z7010-AD9364)
	hw_model_variant: 1
	hw_serial: 
	fw_version: v0.32-1-g7bdc-dirty
	ad9361-phy,xo_correction: 40000000
	ad9361-phy,model: ad9364
	local,kernel: 4.19.0-g8e9fc41dc7db
	uri: local:
	ip,ip-addr: 192.168.2.1
IIO context has 4 devices:
	iio:device0: ad9361-phy
		9 channels found:
			altvoltage0: RX_LO (output)
			8 channel-specific attributes found:
				attr  0: external value: 0
				attr  1: fastlock_load value: 0
				attr  2: fastlock_recall ERROR: Invalid argument (-22)
				attr  3: fastlock_save value: 0 149,63,10,139,235,227,171,227,227,227,10,235,227,227,79,227
				attr  4: fastlock_store value: 0
				attr  5: frequency value: 98499998
				attr  6: frequency_available value: [70000000 1 6000000000]
				attr  7: powerdown value: 0
			altvoltage1: TX_LO (output)
			8 channel-specific attributes found:
				attr  0: external value: 0
				attr  1: fastlock_load value: 0
				attr  2: fastlock_recall ERROR: Invalid argument (-22)
				attr  3: fastlock_save value: 0 64,208,88,223,217,81,223,223,223,223,223,223,223,163,223,217
				attr  4: fastlock_store value: 0
				attr  5: frequency value: 2450000000
				attr  6: frequency_available value: [46875001 1 6000000000]
				attr  7: powerdown value: 0
			out:  (input)
			1 channel-specific attributes found:
				attr  0: voltage_filter_fir_en value: 1
			temp0:  (input)
			1 channel-specific attributes found:
				attr  0: input value: 42982
			voltage0:  (output)
			10 channel-specific attributes found:
				attr  0: filter_fir_en value: 1
				attr  1: hardwaregain value: -10.000000 dB
				attr  2: hardwaregain_available value: [-89.750000 0.250000 0.000000]
				attr  3: rf_bandwidth value: 18000000
				attr  4: rf_bandwidth_available value: [200000 1 40000000]
				attr  5: rf_port_select value: A
				attr  6: rf_port_select_available value: A B
				attr  7: rssi value: 0.00 dB
				attr  8: sampling_frequency value: 3000000
				attr  9: sampling_frequency_available value: [520833 1 30720000]
			voltage0:  (input)
			15 channel-specific attributes found:
				attr  0: bb_dc_offset_tracking_en value: 1
				attr  1: filter_fir_en value: 1
				attr  2: gain_control_mode value: slow_attack
				attr  3: gain_control_mode_available value: manual fast_attack slow_attack hybrid
				attr  4: hardwaregain value: 73.000000 dB
				attr  5: hardwaregain_available value: [-1 1 73]
				attr  6: quadrature_tracking_en value: 1
				attr  7: rf_bandwidth value: 18000000
				attr  8: rf_bandwidth_available value: [200000 1 56000000]
				attr  9: rf_dc_offset_tracking_en value: 1
				attr 10: rf_port_select value: A_BALANCED
				attr 11: rf_port_select_available value: A_BALANCED B_BALANCED C_BALANCED A_N A_P B_N B_P C_N C_P TX_MONITOR1 TX_MONITOR2 TX_MONITOR1_2
				attr 12: rssi value: 114.25 dB
				attr 13: sampling_frequency value: 3000000
				attr 14: sampling_frequency_available value: [520833 1 30720000]
			voltage2:  (output)
			8 channel-specific attributes found:
				attr  0: filter_fir_en value: 1
				attr  1: raw value: 306
				attr  2: rf_bandwidth value: 18000000
				attr  3: rf_bandwidth_available value: [200000 1 40000000]
				attr  4: rf_port_select_available value: A B
				attr  5: sampling_frequency value: 3000000
				attr  6: sampling_frequency_available value: [520833 1 30720000]
				attr  7: scale value: 1.000000
			voltage2:  (input)
			13 channel-specific attributes found:
				attr  0: bb_dc_offset_tracking_en value: 1
				attr  1: filter_fir_en value: 1
				attr  2: gain_control_mode_available value: manual fast_attack slow_attack hybrid
				attr  3: offset value: 57
				attr  4: quadrature_tracking_en value: 1
				attr  5: raw value: 584
				attr  6: rf_bandwidth value: 18000000
				attr  7: rf_bandwidth_available value: [200000 1 56000000]
				attr  8: rf_dc_offset_tracking_en value: 1
				attr  9: rf_port_select_available value: A_BALANCED B_BALANCED C_BALANCED A_N A_P B_N B_P C_N C_P TX_MONITOR1 TX_MONITOR2 TX_MONITOR1_2
				attr 10: sampling_frequency value: 3000000
				attr 11: sampling_frequency_available value: [520833 1 30720000]
				attr 12: scale value: 0.305250
			voltage3:  (output)
			8 channel-specific attributes found:
				attr  0: filter_fir_en value: 1
				attr  1: raw value: 306
				attr  2: rf_bandwidth value: 18000000
				attr  3: rf_bandwidth_available value: [200000 1 40000000]
				attr  4: rf_port_select_available value: A B
				attr  5: sampling_frequency value: 3000000
				attr  6: sampling_frequency_available value: [520833 1 30720000]
				attr  7: scale value: 1.000000
		18 device-specific attributes found:
				attr  0: calib_mode value: auto
				attr  1: calib_mode_available value: auto manual manual_tx_quad tx_quad rf_dc_offs rssi_gain_step
				attr  2: dcxo_tune_coarse ERROR: No such device (-19)
				attr  3: dcxo_tune_coarse_available value: [0 0 0]
				attr  4: dcxo_tune_fine ERROR: No such device (-19)
				attr  5: dcxo_tune_fine_available value: [0 0 0]
				attr  6: ensm_mode value: fdd
				attr  7: ensm_mode_available value: sleep wait alert fdd pinctrl pinctrl_fdd_indep
				attr  8: filter_fir_config value: FIR Rx: 128,4 Tx: 128,4
				attr  9: gain_table_config ERROR: Input/output error (-5)
				attr 10: multichip_sync ERROR: Permission denied (-13)
				attr 11: rssi_gain_step_error value: lna_error: 0 0 0 0
mixer_error: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
gain_step_calib_reg_val: 0 0 0 0 0
				attr 12: rx_path_rates value: BBPLL:768000000 ADC:96000000 R2:48000000 R1:24000000 RF:12000000 RXSAMP:3000000
				attr 13: trx_rate_governor value: nominal
				attr 14: trx_rate_governor_available value: nominal highest_osr
				attr 15: tx_path_rates value: BBPLL:768000000 DAC:96000000 T2:48000000 T1:24000000 TF:12000000 TXSAMP:3000000
				attr 16: xo_correction value: 40000000
				attr 17: xo_correction_available value: [39992000 1 40008000]
		182 debug attributes found:
				debug attr  0: digital_tune value: 0
				debug attr  1: calibration_switch_control value: 0
				debug attr  2: multichip_sync value: 0
				debug attr  3: gaininfo_rx2 ERROR: Resource temporarily unavailable (-11)
				debug attr  4: gaininfo_rx1 value: 73 76 0 0 0 0 0 0
				debug attr  5: bist_timing_analysis value: 0
				debug attr  6: gpo_set value: 0
				debug attr  7: bist_tone value: 0
				debug attr  8: bist_prbs value: 0
				debug attr  9: loopback value: 0
				debug attr 10: initialize value: 0
				debug attr 11: adi,bb-clk-change-dig-tune-enable value: 0
				debug attr 12: adi,axi-half-dac-rate-enable value: 0
				debug attr 13: adi,txmon-2-lo-cm value: 48
				debug attr 14: adi,txmon-1-lo-cm value: 48
				debug attr 15: adi,txmon-2-front-end-gain value: 2
				debug attr 16: adi,txmon-1-front-end-gain value: 2
				debug attr 17: adi,txmon-duration value: 8192
				debug attr 18: adi,txmon-delay value: 511
				debug attr 19: adi,txmon-one-shot-mode-enable value: 0
				debug attr 20: adi,txmon-dc-tracking-enable value: 0
				debug attr 21: adi,txmon-high-gain value: 24
				debug attr 22: adi,txmon-low-gain value: 0
				debug attr 23: adi,txmon-low-high-thresh value: 37000
				debug attr 24: adi,gpo3-tx-delay-us value: 0
				debug attr 25: adi,gpo3-rx-delay-us value: 0
				debug attr 26: adi,gpo2-tx-delay-us value: 0
				debug attr 27: adi,gpo2-rx-delay-us value: 0
				debug attr 28: adi,gpo1-tx-delay-us value: 0
				debug attr 29: adi,gpo1-rx-delay-us value: 0
				debug attr 30: adi,gpo0-tx-delay-us value: 0
				debug attr 31: adi,gpo0-rx-delay-us value: 0
				debug attr 32: adi,gpo3-slave-tx-enable value: 0
				debug attr 33: adi,gpo3-slave-rx-enable value: 0
				debug attr 34: adi,gpo2-slave-tx-enable value: 0
				debug attr 35: adi,gpo2-slave-rx-enable value: 0
				debug attr 36: adi,gpo1-slave-tx-enable value: 0
				debug attr 37: adi,gpo1-slave-rx-enable value: 0
				debug attr 38: adi,gpo0-slave-tx-enable value: 0
				debug attr 39: adi,gpo0-slave-rx-enable value: 0
				debug attr 40: adi,gpo3-inactive-state-high-enable value: 0
				debug attr 41: adi,gpo2-inactive-state-high-enable value: 0
				debug attr 42: adi,gpo1-inactive-state-high-enable value: 0
				debug attr 43: adi,gpo0-inactive-state-high-enable value: 0
				debug attr 44: adi,gpo-manual-mode-enable-mask value: 0
				debug attr 45: adi,gpo-manual-mode-enable value: 0
				debug attr 46: adi,aux-dac2-tx-delay-us value: 0
				debug attr 47: adi,aux-dac2-rx-delay-us value: 0
				debug attr 48: adi,aux-dac2-active-in-alert-enable value: 0
				debug attr 49: adi,aux-dac2-active-in-tx-enable value: 0
				debug attr 50: adi,aux-dac2-active-in-rx-enable value: 0
				debug attr 51: adi,aux-dac2-default-value-mV value: 0
				debug attr 52: adi,aux-dac1-tx-delay-us value: 0
				debug attr 53: adi,aux-dac1-rx-delay-us value: 0
				debug attr 54: adi,aux-dac1-active-in-alert-enable value: 0
				debug attr 55: adi,aux-dac1-active-in-tx-enable value: 0
				debug attr 56: adi,aux-dac1-active-in-rx-enable value: 0
				debug attr 57: adi,aux-dac1-default-value-mV value: 0
				debug attr 58: adi,aux-dac-manual-mode-enable value: 1
				debug attr 59: adi,aux-adc-decimation value: 256
				debug attr 60: adi,aux-adc-rate value: 40000000
				debug attr 61: adi,temp-sense-decimation value: 256
				debug attr 62: adi,temp-sense-periodic-measurement-enable value: 1
				debug attr 63: adi,temp-sense-offset-signed value: 206
				debug attr 64: adi,temp-sense-measurement-interval-ms value: 1000
				debug attr 65: adi,elna-gaintable-all-index-enable value: 0
				debug attr 66: adi,elna-rx2-gpo1-control-enable value: 0
				debug attr 67: adi,elna-rx1-gpo0-control-enable value: 0
				debug attr 68: adi,elna-bypass-loss-mdB value: 0
				debug attr 69: adi,elna-gain-mdB value: 0
				debug attr 70: adi,elna-settling-delay-ns value: 0
				debug attr 71: adi,ctrl-outs-enable-mask value: 255
				debug attr 72: adi,ctrl-outs-index value: 0
				debug attr 73: adi,rssi-duration value: 1000
				debug attr 74: adi,rssi-wait value: 1
				debug attr 75: adi,rssi-delay value: 1
				debug attr 76: adi,rssi-unit-is-rx-samples-enable value: 0
				debug attr 77: adi,rssi-restart-mode value: 3
				debug attr 78: adi,fagc-adc-large-overload-inc-steps value: 2
				debug attr 79: adi,fagc-power-measurement-duration-in-state5 value: 64
				debug attr 80: adi,fagc-rst-gla-if-en-agc-pulled-high-mode value: 0
				debug attr 81: adi,fagc-rst-gla-en-agc-pulled-high-enable value: 0
				debug attr 82: adi,fagc-rst-gla-large-lmt-overload-enable value: 1
				debug attr 83: adi,fagc-rst-gla-large-adc-overload-enable value: 1
				debug attr 84: adi,fagc-energy-lost-stronger-sig-gain-lock-exit-cnt value: 8
				debug attr 85: adi,fagc-rst-gla-engergy-lost-sig-thresh-below-ll value: 10
				debug attr 86: adi,fagc-rst-gla-engergy-lost-goto-optim-gain-enable value: 1
				debug attr 87: adi,fagc-rst-gla-engergy-lost-sig-thresh-exceeded-enable value: 1
				debug attr 88: adi,fagc-rst-gla-stronger-sig-thresh-above-ll value: 10
				debug attr 89: adi,fagc-optimized-gain-offset value: 5
				debug attr 90: adi,fagc-rst-gla-stronger-sig-thresh-exceeded-enable value: 1
				debug attr 91: adi,fagc-use-last-lock-level-for-set-gain-enable value: 1
				debug attr 92: adi,fagc-gain-index-type-after-exit-rx-mode value: 0
				debug attr 93: adi,fagc-gain-increase-after-gain-lock-enable value: 0
				debug attr 94: adi,fagc-final-overrange-count value: 3
				debug attr 95: adi,fagc-lmt-final-settling-steps value: 1
				debug attr 96: adi,fagc-lpf-final-settling-steps value: 1
				debug attr 97: adi,fagc-lock-level-gain-increase-upper-limit value: 5
				debug attr 98: adi,fagc-lock-level-lmt-gain-increase-enable value: 1
				debug attr 99: adi,fagc-lp-thresh-increment-steps value: 1
				debug attr 100: adi,fagc-lp-thresh-increment-time value: 5
				debug attr 101: adi,fagc-allow-agc-gain-increase-enable value: 0
				debug attr 102: adi,fagc-state-wait-time-ns value: 260
				debug attr 103: adi,fagc-dec-pow-measurement-duration value: 64
				debug attr 104: adi,agc-immed-gain-change-if-large-lmt-overload-enable value: 0
				debug attr 105: adi,agc-immed-gain-change-if-large-adc-overload-enable value: 0
				debug attr 106: adi,agc-gain-update-interval-us value: 1000
				debug attr 107: adi,agc-sync-for-gain-counter-enable value: 0
				debug attr 108: adi,agc-dig-gain-step-size value: 4
				debug attr 109: adi,agc-dig-saturation-exceed-counter value: 3
				debug attr 110: adi,agc-lmt-overload-large-inc-steps value: 2
				debug attr 111: adi,agc-lmt-overload-small-exceed-counter value: 10
				debug attr 112: adi,agc-lmt-overload-large-exceed-counter value: 10
				debug attr 113: adi,agc-adc-lmt-small-overload-prevent-gain-inc-enable value: 0
				debug attr 114: adi,agc-adc-large-overload-inc-steps value: 2
				debug attr 115: adi,agc-adc-large-overload-exceed-counter value: 10
				debug attr 116: adi,agc-adc-small-overload-exceed-counter value: 10
				debug attr 117: adi,agc-outer-thresh-low-inc-steps value: 2
				debug attr 118: adi,agc-outer-thresh-low value: 18
				debug attr 119: adi,agc-inner-thresh-low-inc-steps value: 1
				debug attr 120: adi,agc-inner-thresh-low value: 12
				debug attr 121: adi,agc-inner-thresh-high-dec-steps value: 1
				debug attr 122: adi,agc-inner-thresh-high value: 10
				debug attr 123: adi,agc-outer-thresh-high-dec-steps value: 2
				debug attr 124: adi,agc-outer-thresh-high value: 5
				debug attr 125: adi,agc-attack-delay-extra-margin-us value: 1
				debug attr 126: adi,mgc-split-table-ctrl-inp-gain-mode value: 0
				debug attr 127: adi,mgc-dec-gain-step value: 2
				debug attr 128: adi,mgc-inc-gain-step value: 2
				debug attr 129: adi,mgc-rx2-ctrl-inp-enable value: 0
				debug attr 130: adi,mgc-rx1-ctrl-inp-enable value: 0
				debug attr 131: adi,gc-use-rx-fir-out-for-dec-pwr-meas-enable value: 0
				debug attr 132: adi,gc-max-dig-gain value: 15
				debug attr 133: adi,gc-dig-gain-enable value: 0
				debug attr 134: adi,gc-low-power-thresh value: 24
				debug attr 135: adi,gc-dec-pow-measurement-duration value: 8192
				debug attr 136: adi,gc-lmt-overload-low-thresh value: 704
				debug attr 137: adi,gc-lmt-overload-high-thresh value: 800
				debug attr 138: adi,gc-adc-large-overload-thresh value: 58
				debug attr 139: adi,gc-adc-small-overload-thresh value: 47
				debug attr 140: adi,gc-adc-ovr-sample-size value: 4
				debug attr 141: adi,gc-rx2-mode value: 2
				debug attr 142: adi,gc-rx1-mode value: 2
				debug attr 143: adi,update-tx-gain-in-alert-enable value: 0
				debug attr 144: adi,tx-attenuation-mdB value: 10000
				debug attr 145: adi,rf-tx-bandwidth-hz value: 18000000
				debug attr 146: adi,rf-rx-bandwidth-hz value: 18000000
				debug attr 147: adi,qec-tracking-slow-mode-enable value: 0
				debug attr 148: adi,dc-offset-count-low-range value: 50
				debug attr 149: adi,dc-offset-count-high-range value: 40
				debug attr 150: adi,dc-offset-attenuation-low-range value: 5
				debug attr 151: adi,dc-offset-attenuation-high-range value: 6
				debug attr 152: adi,dc-offset-tracking-update-event-mask value: 5
				debug attr 153: adi,clk-output-mode-select value: 0
				debug attr 154: adi,external-rx-lo-enable value: 0
				debug attr 155: adi,external-tx-lo-enable value: 0
				debug attr 156: adi,xo-disable-use-ext-refclk-enable value: 1
				debug attr 157: adi,tx-lo-powerdown-managed-enable value: 1
				debug attr 158: adi,trx-synthesizer-target-fref-overwrite-hz value: 80008000
				debug attr 159: adi,rx1-rx2-phase-inversion-enable value: 0
				debug attr 160: adi,tx-rf-port-input-select-lock-enable value: 1
				debug attr 161: adi,rx-rf-port-input-select-lock-enable value: 1
				debug attr 162: adi,tx-rf-port-input-select value: 0
				debug attr 163: adi,rx-rf-port-input-select value: 0
				debug attr 164: adi,split-gain-table-mode-enable value: 0
				debug attr 165: adi,1rx-1tx-mode-use-tx-num value: 1
				debug attr 166: adi,1rx-1tx-mode-use-rx-num value: 1
				debug attr 167: adi,2rx-2tx-mode-enable value: 0
				debug attr 168: adi,digital-interface-tune-fir-disable value: 1
				debug attr 169: adi,digital-interface-tune-skip-mode value: 0
				debug attr 170: adi,tx-fastlock-pincontrol-enable value: 0
				debug attr 171: adi,rx-fastlock-pincontrol-enable value: 0
				debug attr 172: adi,rx-fastlock-delay-ns value: 0
				debug attr 173: adi,tx-fastlock-delay-ns value: 0
				debug attr 174: adi,tdd-skip-vco-cal-enable value: 0
				debug attr 175: adi,tdd-use-dual-synth-mode-enable value: 0
				debug attr 176: adi,debug-mode-enable value: 0
				debug attr 177: adi,ensm-enable-txnrx-control-enable value: 0
				debug attr 178: adi,ensm-enable-pin-pulse-mode-enable value: 0
				debug attr 179: adi,frequency-division-duplex-independent-mode-enable value: 0
				debug attr 180: adi,frequency-division-duplex-mode-enable value: 1
				debug attr 181: direct_reg_access value: 0x0
	iio:device1: xadc
		10 channels found:
			temp0:  (input)
			3 channel-specific attributes found:
				attr  0: offset value: -2219
				attr  1: raw value: 2717
				attr  2: scale value: 123.040771484
			voltage0: vccint (input)
			2 channel-specific attributes found:
				attr  0: raw value: 1412
				attr  1: scale value: 0.732421875
			voltage1: vccaux (input)
			2 channel-specific attributes found:
				attr  0: raw value: 2375
				attr  1: scale value: 0.732421875
			voltage2: vccbram (input)
			2 channel-specific attributes found:
				attr  0: raw value: 1412
				attr  1: scale value: 0.732421875
			voltage3: vccpint (input)
			2 channel-specific attributes found:
				attr  0: raw value: 1408
				attr  1: scale value: 0.732421875
			voltage4: vccpaux (input)
			2 channel-specific attributes found:
				attr  0: raw value: 2379
				attr  1: scale value: 0.732421875
			voltage5: vccoddr (input)
			2 channel-specific attributes found:
				attr  0: raw value: 2081
				attr  1: scale value: 0.732421875
			voltage6: vrefp (input)
			2 channel-specific attributes found:
				attr  0: raw value: 1706
				attr  1: scale value: 0.732421875
			voltage7: vrefn (input)
			2 channel-specific attributes found:
				attr  0: raw value: 0
				attr  1: scale value: 0.732421875
			voltage8:  (input)
			2 channel-specific attributes found:
				attr  0: raw value: 3560
				attr  1: scale value: 0.244140625
		1 device-specific attributes found:
				attr  0: sampling_frequency value: 961538
	iio:device2: cf-ad9361-dds-core-lpc (buffer capable)
		6 channels found:
			voltage0:  (output, index: 0, format: le:S16/16>>0)
			4 channel-specific attributes found:
				attr  0: calibphase value: 0.000000
				attr  1: calibscale value: 1.000000
				attr  2: sampling_frequency value: 3000000
				attr  3: sampling_frequency_available value: 3000000 375000 
			voltage1:  (output, index: 1, format: le:S16/16>>0)
			4 channel-specific attributes found:
				attr  0: calibphase value: 0.000000
				attr  1: calibscale value: 1.000000
				attr  2: sampling_frequency value: 3000000
				attr  3: sampling_frequency_available value: 3000000 375000 
			altvoltage0: TX1_I_F1 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 999450
				attr  1: phase value: 90000
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 3000000
				attr  4: scale value: 0.000000
			altvoltage1: TX1_I_F2 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 999450
				attr  1: phase value: 90000
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 3000000
				attr  4: scale value: 0.000000
			altvoltage2: TX1_Q_F1 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 999450
				attr  1: phase value: 0
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 3000000
				attr  4: scale value: 0.000000
			altvoltage3: TX1_Q_F2 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 999450
				attr  1: phase value: 0
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 3000000
				attr  4: scale value: 0.000000
		3 buffer-specific attributes found:
				attr  0: data_available value: 0
				attr  1: length_align_bytes value: 8
				attr  2: watermark value: 2048
		1 debug attributes found:
				debug attr  0: direct_reg_access value: 0x90162
	iio:device3: cf-ad9361-lpc (buffer capable)
		2 channels found:
			voltage0:  (input, index: 0, format: le:S12/16>>0)
			6 channel-specific attributes found:
				attr  0: calibbias value: 0
				attr  1: calibphase value: 0.000000
				attr  2: calibscale value: 1.000000
				attr  3: samples_pps ERROR: No such device (-19)
				attr  4: sampling_frequency value: 3000000
				attr  5: sampling_frequency_available value: 3000000 375000 
			voltage1:  (input, index: 1, format: le:S12/16>>0)
			6 channel-specific attributes found:
				attr  0: calibbias value: 0
				attr  1: calibphase value: 0.000000
				attr  2: calibscale value: 1.000000
				attr  3: samples_pps ERROR: No such device (-19)
				attr  4: sampling_frequency value: 3000000
				attr  5: sampling_frequency_available value: 3000000 375000 
		3 buffer-specific attributes found:
				attr  0: data_available value: 0
				attr  1: length_align_bytes value: 8
				attr  2: watermark value: 2048
		2 debug attributes found:
				debug attr  0: pseudorandom_err_check value: CH0 : PN9 : Out of Sync : PN Error
CH1 : PN9 : Out of Sync : PN Error
				debug attr  1: direct_reg_access value: 0x0
pi@raspberrypi:~ $ 

[zuckschwerdt]

Look at ad9361-phy: there are limited controls on the second channel, i.e. no gain_control_mode, hardwaregain, rf_port_select values on voltage2 (RX2/TX2). I guess those are all linked to voltage0 (RX1/TX1)? Useful for MIMO only then?

Generally there is support for multiple channels, if you set https://github.com/pothosware/SoapyPlutoSDR/blob/master/PlutoSDR_Settings.cpp#L118 to "2" and recompile you should be able to stream both RX or both TX at the same time. E.g. setupStream() does recognize channels={0,1}.

[zuckschwerdt]

Interestingly https://wiki.analog.com/resources/tools-software/linux-drivers/iio-transceiver/ad9361#tx_attenuation_control talks about "attenuation/gain can be individually controlled for TX1 and TX2" at "voltage1 hardwaregain", but there is no voltage1 here, I assume it's the voltage2 channel, and there is no hardwaregain value.

[nategri]

Ah! So you're saying the RX2 channel just has whatever gain the RX1 one has?

Also I did exactly that one line code change and recompile (1->2) before I opened the issue. I thought what I was trying was too naive because it looked like the data coming from both channels was the same. But maybe I got my observation wrong! Will look again.

[zuckschwerdt]

Yes, and most of the other settings too. IIO is the API. any value you don't find there is not an API setting.

[moemuses]

Hi @zuckschwerdt
I have pluto+ with SoapySDRUtil --probe="driver=plutosdr"
we have only one RX channel "numbered 0" :

----------------------------------------------------
-- RX Channel 0
----------------------------------------------------
  Full-duplex: YES
  Supports AGC: YES
  Stream formats: CS8, CS12, CS16, CF32
  Native format: CS16 [full-scale=2048]
  Antennas: A_BALANCED
  Full gain range: [0, 73] dB
    PGA gain range: [0, 73] dB
  Full freq range: [70, 6000] MHz
    RF freq range: [70, 6000] MHz
  Sample rates: [0.260417, 61.44] MSps
  Filter bandwidths: 0.2, 1, 2, 3, 4, 6, 7, 8, 9, 10 MHz

but inside pluto device inside cd /sys/bus/iio/devices/iio:device0 we heve :

in_voltage0_gain_control_mode,
in_voltage0_hardwaregain     ,        
in_voltage0_hardwaregain_available   ,
in_voltage0_rf_port_select           ,
in_voltage0_rssi               ,      
in_voltage1_gain_control_mode        ,
in_voltage1_hardwaregain             ,
in_voltage1_hardwaregain_available   ,
in_voltage1_rf_port_select           ,
in_voltage1_rssi                     

both RX port have their own parameters.

My Question, can i use the second channel RX2 using SoapyPlutoSDR ?

[zuckschwerdt]

The AD9363 is a 2x2 transceiver, but I wasn't aware that the second channel is connected in any hardware version.
That "Pluto+" seems to be a no-name knock-off with some extra features (2nd channels, Gigabit ethernet).

You can change "getNumChannels" like written above to test things. But we are not explicitly using the "voltage1".

Can you give a dump of iio_info (iio_info --scan)?

[moemuses]

Library version: 0.21 (git tag: v0.21)
Compiled with backends: local xml ip usb serial
Using auto-detected IIO context at URI "usb:1.70.5"
IIO context created with usb backend.
Backend version: 0.21 (git tag: v0.21  )
Backend description string: Linux (none) 5.4.0-gb05d16429dac-dirty #4 SMP PREEMPT Fri Apr 23 23:55:52 CST 2021 armv7l
IIO context has 15 attributes:
	hw_model: Analog Devices PlutoSDR Rev.C (Z7010-AD9363A)
	hw_model_variant: 1
	hw_serial: 104000d6500700130d002000e1ced35cae
	fw_version: v0.33-3-gd382-dirty
	ad9361-phy,xo_correction: 40000000
	ad9361-phy,model: ad9363a
	local,kernel: 5.4.0-gb05d16429dac-dirty
	uri: usb:1.70.5
	usb,idVendor: 0456
	usb,idProduct: b673
	usb,release: 2.0
	usb,vendor: Analog Devices Inc.
	usb,product: PlutoSDR (ADALM-PLUTO)
	usb,serial: 104000d6500700130d002000e1ced35cae
	usb,libusb: 1.0.24.11584
IIO context has 4 devices:
	iio:device0: ad9361-phy
		11 channels found:
			altvoltage1: TX_LO (output)
			8 channel-specific attributes found:
				attr  0: external value: 0
				attr  1: fastlock_load value: 0
				attr  2: fastlock_recall ERROR: Invalid argument (-22)
				attr  3: fastlock_save value: 0 242,254,255,62,127,255,63,251,251,255,124,86,254,86,111,84
				attr  4: fastlock_store value: 0
				attr  5: frequency value: 2450000000
				attr  6: frequency_available value: [325000000 1 3800000000]
				attr  7: powerdown value: 0
			voltage1:  (output)
			10 channel-specific attributes found:
				attr  0: filter_fir_en value: 0
				attr  1: hardwaregain value: -10.000000 dB
				attr  2: hardwaregain_available value: [-89.750000 0.250000 0.000000]
				attr  3: rf_bandwidth value: 18000000
				attr  4: rf_bandwidth_available value: [200000 1 40000000]
				attr  5: rf_port_select value: A
				attr  6: rf_port_select_available value: A B
				attr  7: rssi value: 0.00 dB
				attr  8: sampling_frequency value: 30720000
				attr  9: sampling_frequency_available value: [2083333 1 30720000]
			voltage0:  (input)
			15 channel-specific attributes found:
				attr  0: bb_dc_offset_tracking_en value: 1
				attr  1: filter_fir_en value: 0
				attr  2: gain_control_mode value: slow_attack
				attr  3: gain_control_mode_available value: manual fast_attack slow_attack hybrid
				attr  4: hardwaregain value: 71.000000 dB
				attr  5: hardwaregain_available value: [-3 1 71]
				attr  6: quadrature_tracking_en value: 1
				attr  7: rf_bandwidth value: 18000000
				attr  8: rf_bandwidth_available value: [200000 1 56000000]
				attr  9: rf_dc_offset_tracking_en value: 1
				attr 10: rf_port_select value: A_BALANCED
				attr 11: rf_port_select_available value: A_BALANCED B_BALANCED C_BALANCED A_N A_P B_N B_P C_N C_P TX_MONITOR1 TX_MONITOR2 TX_MONITOR1_2
				attr 12: rssi value: 96.25 dB
				attr 13: sampling_frequency value: 30720000
				attr 14: sampling_frequency_available value: [2083333 1 30720000]
			voltage1:  (input)
			15 channel-specific attributes found:
				attr  0: bb_dc_offset_tracking_en value: 1
				attr  1: filter_fir_en value: 0
				attr  2: gain_control_mode value: slow_attack
				attr  3: gain_control_mode_available value: manual fast_attack slow_attack hybrid
				attr  4: hardwaregain value: 71.000000 dB
				attr  5: hardwaregain_available value: [-3 1 71]
				attr  6: quadrature_tracking_en value: 1
				attr  7: rf_bandwidth value: 18000000
				attr  8: rf_bandwidth_available value: [200000 1 56000000]
				attr  9: rf_dc_offset_tracking_en value: 1
				attr 10: rf_port_select value: A_BALANCED
				attr 11: rf_port_select_available value: A_BALANCED B_BALANCED C_BALANCED A_N A_P B_N B_P C_N C_P TX_MONITOR1 TX_MONITOR2 TX_MONITOR1_2
				attr 12: rssi value: 114.00 dB
				attr 13: sampling_frequency value: 30720000
				attr 14: sampling_frequency_available value: [2083333 1 30720000]
			voltage3:  (output)
			8 channel-specific attributes found:
				attr  0: filter_fir_en value: 0
				attr  1: raw value: 306
				attr  2: rf_bandwidth value: 18000000
				attr  3: rf_bandwidth_available value: [200000 1 40000000]
				attr  4: rf_port_select_available value: A B
				attr  5: sampling_frequency value: 30720000
				attr  6: sampling_frequency_available value: [2083333 1 30720000]
				attr  7: scale value: 1.000000
			altvoltage0: RX_LO (output)
			8 channel-specific attributes found:
				attr  0: external value: 0
				attr  1: fastlock_load value: 0
				attr  2: fastlock_recall ERROR: Invalid argument (-22)
				attr  3: fastlock_save value: 0 255,223,255,223,255,79,207,255,207,254,212,207,223,255,250,223
				attr  4: fastlock_store value: 0
				attr  5: frequency value: 2400000000
				attr  6: frequency_available value: [325000000 1 3800000000]
				attr  7: powerdown value: 0
			voltage2:  (output)
			8 channel-specific attributes found:
				attr  0: filter_fir_en value: 0
				attr  1: raw value: 306
				attr  2: rf_bandwidth value: 18000000
				attr  3: rf_bandwidth_available value: [200000 1 40000000]
				attr  4: rf_port_select_available value: A B
				attr  5: sampling_frequency value: 30720000
				attr  6: sampling_frequency_available value: [2083333 1 30720000]
				attr  7: scale value: 1.000000
			temp0:  (input)
			1 channel-specific attributes found:
				attr  0: input value: 57895
			voltage0:  (output)
			10 channel-specific attributes found:
				attr  0: filter_fir_en value: 0
				attr  1: hardwaregain value: -10.000000 dB
				attr  2: hardwaregain_available value: [-89.750000 0.250000 0.000000]
				attr  3: rf_bandwidth value: 18000000
				attr  4: rf_bandwidth_available value: [200000 1 40000000]
				attr  5: rf_port_select value: A
				attr  6: rf_port_select_available value: A B
				attr  7: rssi value: 0.00 dB
				attr  8: sampling_frequency value: 30720000
				attr  9: sampling_frequency_available value: [2083333 1 30720000]
			voltage2:  (input)
			13 channel-specific attributes found:
				attr  0: bb_dc_offset_tracking_en value: 1
				attr  1: filter_fir_en value: 0
				attr  2: gain_control_mode_available value: manual fast_attack slow_attack hybrid
				attr  3: offset value: 57
				attr  4: quadrature_tracking_en value: 1
				attr  5: raw value: 942
				attr  6: rf_bandwidth value: 18000000
				attr  7: rf_bandwidth_available value: [200000 1 56000000]
				attr  8: rf_dc_offset_tracking_en value: 1
				attr  9: rf_port_select_available value: A_BALANCED B_BALANCED C_BALANCED A_N A_P B_N B_P C_N C_P TX_MONITOR1 TX_MONITOR2 TX_MONITOR1_2
				attr 10: sampling_frequency value: 30720000
				attr 11: sampling_frequency_available value: [2083333 1 30720000]
				attr 12: scale value: 0.305250
			out:  (input, WARN:iio_channel_get_type()=UNKNOWN)
			1 channel-specific attributes found:
				attr  0: voltage_filter_fir_en value: 0
		18 device-specific attributes found:
				attr  0: calib_mode value: auto
				attr  1: calib_mode_available value: auto manual manual_tx_quad tx_quad rf_dc_offs rssi_gain_step
				attr  2: dcxo_tune_coarse ERROR: No such device (-19)
				attr  3: dcxo_tune_coarse_available value: [0 0 0]
				attr  4: dcxo_tune_fine ERROR: No such device (-19)
				attr  5: dcxo_tune_fine_available value: [0 0 0]
				attr  6: ensm_mode value: fdd
				attr  7: ensm_mode_available value: sleep wait alert fdd pinctrl pinctrl_fdd_indep
				attr  8: filter_fir_config value: FIR Rx: 0,0 Tx: 0,0
				attr  9: gain_table_config value: <gaintable AD9361 type=FULL dest=3 start=1300000000 end=4000000000>
-3, 0x00, 0x00, 0x20
-3, 0x00, 0x00, 0x00
-3, 0x00, 0x00, 0x00
-2, 0x00, 0x01, 0x00
-1, 0x00, 0x02, 0x00
0, 0x00, 0x03, 0x00
1, 0x00, 0x04, 0x00
2, 0x00, 0x05, 0x00
3, 0x01, 0x03, 0x20
4, 0x01, 0x04, 0x00
5, 0x01, 0x05, 0x00
6, 0x01, 0x06, 0x00
7, 0x01, 0x07, 0x00
8, 0x01, 0x08, 0x00
9, 0x01, 0x09, 0x00
10, 0x01, 0x0A, 0x00
11, 0x01, 0x0B, 0x00
12, 0x01, 0x0C, 0x00
13, 0x01, 0x0D, 0x00
14, 0x01, 0x0E, 0x00
15, 0x02, 0x09, 0x20
16, 0x02, 0x0A, 0x00
17, 0x02, 0x0B, 0x00
18, 0x02, 0x0C, 0x00
19, 0x02, 0x0D, 0x00
20, 0x02, 0x0E, 0x00
21, 0x02, 0x0F, 0x00
22, 0x02, 0x10, 0x00
23, 0x02, 0x2B, 0x20
24, 0x02, 0x2C, 0x00
25, 0x04, 0x27, 0x20
26, 0x04, 0x28, 0x00
27, 0x04, 0x29, 0x00
28, 0x04, 0x2A, 0x00
29, 0x04, 0x2B, 0x00
30, 0x24, 0x21, 0x20
31, 0x24, 0x22, 0x00
32, 0x44, 0x20, 0x20
33, 0x44, 0x21, 0x00
34, 0x44, 0x22, 0x00
35, 0x44, 0x23, 0x00
36, 0x44, 0x24, 0x00
37, 0x44, 0x25, 0x00
38, 0x44, 0x26, 0x00
39, 0x44, 0x27, 0x00
40, 0x44, 0x28, 0x00
41, 0x44, 0x29, 0x00
42, 0x44, 0x2A, 0x00
43, 0x44, 0x2B, 0x00
44, 0x44, 0x2C, 0x00
45, 0x44, 0x2D, 0x00
46, 0x44, 0x2E, 0x00
47, 0x44, 0x2F, 0x00
48, 0x44, 0x30, 0x00
49, 0x44, 0x31, 0x00
50, 0x64, 0x2E, 0x20
51, 0x64, 0x2F, 0x00
52, 0x64, 0x30, 0x00
53, 0x64, 0x31, 0x00
54, 0x64, 0x32, 0x00
55, 0x64, 0x33, 0x00
56, 0x64, 0x34, 0x00
57, 0x64, 0x35, 0x00
58, 0x64, 0x36, 0x00
59, 0x64, 0x37, 0x00
60, 0x64, 0x38, 0x00
61, 0x65, 0x38, 0x20
62, 0x66, 0x38, 0x20
63, 0x67, 0x38, 0x20
64, 0x68, 0x38, 0x20
65, 0x69, 0x38, 0x20
66, 0x6A, 0x38, 0x20
67, 0x6B, 0x38, 0x20
68, 0x6C, 0x38, 0x20
69, 0x6D, 0x38, 0x20
70, 0x6E, 0x38, 0x20
71, 0x6F, 0x38, 0x20
</gaintable>
				attr 10: multichip_sync ERROR: Permission denied (-13)
				attr 11: rssi_gain_step_error value: lna_error: 0 0 0 0
mixer_error: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
gain_step_calib_reg_val: 0 0 0 0 0
				attr 12: rx_path_rates value: BBPLL:983040000 ADC:245760000 R2:122880000 R1:61440000 RF:30720000 RXSAMP:30720000
				attr 13: trx_rate_governor value: nominal
				attr 14: trx_rate_governor_available value: nominal highest_osr
				attr 15: tx_path_rates value: BBPLL:983040000 DAC:122880000 T2:122880000 T1:61440000 TF:30720000 TXSAMP:30720000
				attr 16: xo_correction value: 40000000
				attr 17: xo_correction_available value: [39992000 1 40008000]
		179 debug attributes found:
				debug attr  0: digital_tune value: 0
				debug attr  1: calibration_switch_control value: 0
				debug attr  2: multichip_sync value: 0
				debug attr  3: gaininfo_rx2 value: 71 76 0 0 0 0 0 0
				debug attr  4: gaininfo_rx1 value: 62 67 0 0 0 0 0 0
				debug attr  5: bist_timing_analysis value: 0
				debug attr  6: gpo_set value: 0
				debug attr  7: bist_tone value: 0
				debug attr  8: bist_prbs value: 0
				debug attr  9: loopback value: 0
				debug attr 10: initialize value: 0
				debug attr 11: adi,bb-clk-change-dig-tune-enable value: 0
				debug attr 12: adi,axi-half-dac-rate-enable value: 0
				debug attr 13: adi,txmon-2-lo-cm value: 48
				debug attr 14: adi,txmon-1-lo-cm value: 48
				debug attr 15: adi,txmon-2-front-end-gain value: 2
				debug attr 16: adi,txmon-1-front-end-gain value: 2
				debug attr 17: adi,txmon-duration value: 8192
				debug attr 18: adi,txmon-delay value: 511
				debug attr 19: adi,txmon-one-shot-mode-enable value: 0
				debug attr 20: adi,txmon-dc-tracking-enable value: 0
				debug attr 21: adi,txmon-high-gain value: 24
				debug attr 22: adi,txmon-low-gain value: 0
				debug attr 23: adi,txmon-low-high-thresh value: 37000
				debug attr 24: adi,gpo3-tx-delay-us value: 0
				debug attr 25: adi,gpo3-rx-delay-us value: 0
				debug attr 26: adi,gpo2-tx-delay-us value: 0
				debug attr 27: adi,gpo2-rx-delay-us value: 0
				debug attr 28: adi,gpo1-tx-delay-us value: 0
				debug attr 29: adi,gpo1-rx-delay-us value: 0
				debug attr 30: adi,gpo0-tx-delay-us value: 0
				debug attr 31: adi,gpo0-rx-delay-us value: 0
				debug attr 32: adi,gpo3-slave-tx-enable value: 0
				debug attr 33: adi,gpo3-slave-rx-enable value: 0
				debug attr 34: adi,gpo2-slave-tx-enable value: 0
				debug attr 35: adi,gpo2-slave-rx-enable value: 0
				debug attr 36: adi,gpo1-slave-tx-enable value: 0
				debug attr 37: adi,gpo1-slave-rx-enable value: 0
				debug attr 38: adi,gpo0-slave-tx-enable value: 0
				debug attr 39: adi,gpo0-slave-rx-enable value: 0
				debug attr 40: adi,gpo3-inactive-state-high-enable value: 0
				debug attr 41: adi,gpo2-inactive-state-high-enable value: 0
				debug attr 42: adi,gpo1-inactive-state-high-enable value: 0
				debug attr 43: adi,gpo0-inactive-state-high-enable value: 0
				debug attr 44: adi,gpo-manual-mode-enable-mask value: 0
				debug attr 45: adi,gpo-manual-mode-enable value: 0
				debug attr 46: adi,aux-dac2-tx-delay-us value: 0
				debug attr 47: adi,aux-dac2-rx-delay-us value: 0
				debug attr 48: adi,aux-dac2-active-in-alert-enable value: 0
				debug attr 49: adi,aux-dac2-active-in-tx-enable value: 0
				debug attr 50: adi,aux-dac2-active-in-rx-enable value: 0
				debug attr 51: adi,aux-dac2-default-value-mV value: 0
				debug attr 52: adi,aux-dac1-tx-delay-us value: 0
				debug attr 53: adi,aux-dac1-rx-delay-us value: 0
				debug attr 54: adi,aux-dac1-active-in-alert-enable value: 0
				debug attr 55: adi,aux-dac1-active-in-tx-enable value: 0
				debug attr 56: adi,aux-dac1-active-in-rx-enable value: 0
				debug attr 57: adi,aux-dac1-default-value-mV value: 0
				debug attr 58: adi,aux-dac-manual-mode-enable value: 1
				debug attr 59: adi,aux-adc-decimation value: 256
				debug attr 60: adi,aux-adc-rate value: 40000000
				debug attr 61: adi,temp-sense-decimation value: 256
				debug attr 62: adi,temp-sense-periodic-measurement-enable value: 1
				debug attr 63: adi,temp-sense-offset-signed value: 206
				debug attr 64: adi,temp-sense-measurement-interval-ms value: 1000
				debug attr 65: adi,elna-gaintable-all-index-enable value: 0
				debug attr 66: adi,elna-rx2-gpo1-control-enable value: 0
				debug attr 67: adi,elna-rx1-gpo0-control-enable value: 0
				debug attr 68: adi,elna-bypass-loss-mdB value: 0
				debug attr 69: adi,elna-gain-mdB value: 0
				debug attr 70: adi,elna-settling-delay-ns value: 0
				debug attr 71: adi,ctrl-outs-enable-mask value: 255
				debug attr 72: adi,ctrl-outs-index value: 0
				debug attr 73: adi,rssi-duration value: 1000
				debug attr 74: adi,rssi-wait value: 1
				debug attr 75: adi,rssi-delay value: 1
				debug attr 76: adi,rssi-unit-is-rx-samples-enable value: 0
				debug attr 77: adi,rssi-restart-mode value: 3
				debug attr 78: adi,fagc-adc-large-overload-inc-steps value: 2
				debug attr 79: adi,fagc-power-measurement-duration-in-state5 value: 64
				debug attr 80: adi,fagc-rst-gla-if-en-agc-pulled-high-mode value: 0
				debug attr 81: adi,fagc-rst-gla-en-agc-pulled-high-enable value: 0
				debug attr 82: adi,fagc-rst-gla-large-lmt-overload-enable value: 1
				debug attr 83: adi,fagc-rst-gla-large-adc-overload-enable value: 1
				debug attr 84: adi,fagc-energy-lost-stronger-sig-gain-lock-exit-cnt value: 8
				debug attr 85: adi,fagc-rst-gla-engergy-lost-sig-thresh-below-ll value: 10
				debug attr 86: adi,fagc-rst-gla-engergy-lost-goto-optim-gain-enable value: 1
				debug attr 87: adi,fagc-rst-gla-engergy-lost-sig-thresh-exceeded-enable value: 1
				debug attr 88: adi,fagc-rst-gla-stronger-sig-thresh-above-ll value: 10
				debug attr 89: adi,fagc-optimized-gain-offset value: 5
				debug attr 90: adi,fagc-rst-gla-stronger-sig-thresh-exceeded-enable value: 1
				debug attr 91: adi,fagc-use-last-lock-level-for-set-gain-enable value: 1
				debug attr 92: adi,fagc-gain-index-type-after-exit-rx-mode value: 0
				debug attr 93: adi,fagc-gain-increase-after-gain-lock-enable value: 0
				debug attr 94: adi,fagc-final-overrange-count value: 3
				debug attr 95: adi,fagc-lmt-final-settling-steps value: 1
				debug attr 96: adi,fagc-lpf-final-settling-steps value: 1
				debug attr 97: adi,fagc-lock-level-gain-increase-upper-limit value: 5
				debug attr 98: adi,fagc-lock-level-lmt-gain-increase-enable value: 1
				debug attr 99: adi,fagc-lp-thresh-increment-steps value: 1
				debug attr 100: adi,fagc-lp-thresh-increment-time value: 5
				debug attr 101: adi,fagc-allow-agc-gain-increase-enable value: 0
				debug attr 102: adi,fagc-state-wait-time-ns value: 260
				debug attr 103: adi,fagc-dec-pow-measurement-duration value: 64
				debug attr 104: adi,agc-immed-gain-change-if-large-lmt-overload-enable value: 0
				debug attr 105: adi,agc-immed-gain-change-if-large-adc-overload-enable value: 0
				debug attr 106: adi,agc-gain-update-interval-us value: 1000
				debug attr 107: adi,agc-sync-for-gain-counter-enable value: 0
				debug attr 108: adi,agc-dig-gain-step-size value: 4
				debug attr 109: adi,agc-dig-saturation-exceed-counter value: 3
				debug attr 110: adi,agc-lmt-overload-large-inc-steps value: 2
				debug attr 111: adi,agc-lmt-overload-small-exceed-counter value: 10
				debug attr 112: adi,agc-lmt-overload-large-exceed-counter value: 10
				debug attr 113: adi,agc-adc-lmt-small-overload-prevent-gain-inc-enable value: 0
				debug attr 114: adi,agc-adc-large-overload-inc-steps value: 2
				debug attr 115: adi,agc-adc-large-overload-exceed-counter value: 10
				debug attr 116: adi,agc-adc-small-overload-exceed-counter value: 10
				debug attr 117: adi,agc-outer-thresh-low-inc-steps value: 2
				debug attr 118: adi,agc-outer-thresh-low value: 18
				debug attr 119: adi,agc-inner-thresh-low-inc-steps value: 1
				debug attr 120: adi,agc-inner-thresh-low value: 12
				debug attr 121: adi,agc-inner-thresh-high-dec-steps value: 1
				debug attr 122: adi,agc-inner-thresh-high value: 10
				debug attr 123: adi,agc-outer-thresh-high-dec-steps value: 2
				debug attr 124: adi,agc-outer-thresh-high value: 5
				debug attr 125: adi,agc-attack-delay-extra-margin-us value: 1
				debug attr 126: adi,mgc-split-table-ctrl-inp-gain-mode value: 0
				debug attr 127: adi,mgc-dec-gain-step value: 2
				debug attr 128: adi,mgc-inc-gain-step value: 2
				debug attr 129: adi,mgc-rx2-ctrl-inp-enable value: 0
				debug attr 130: adi,mgc-rx1-ctrl-inp-enable value: 0
				debug attr 131: adi,gc-use-rx-fir-out-for-dec-pwr-meas-enable value: 0
				debug attr 132: adi,gc-max-dig-gain value: 15
				debug attr 133: adi,gc-dig-gain-enable value: 0
				debug attr 134: adi,gc-low-power-thresh value: 24
				debug attr 135: adi,gc-dec-pow-measurement-duration value: 8192
				debug attr 136: adi,gc-lmt-overload-low-thresh value: 704
				debug attr 137: adi,gc-lmt-overload-high-thresh value: 800
				debug attr 138: adi,gc-adc-large-overload-thresh value: 58
				debug attr 139: adi,gc-adc-small-overload-thresh value: 47
				debug attr 140: adi,gc-adc-ovr-sample-size value: 4
				debug attr 141: adi,gc-rx2-mode value: 2
				debug attr 142: adi,gc-rx1-mode value: 2
				debug attr 143: adi,update-tx-gain-in-alert-enable value: 0
				debug attr 144: adi,tx-attenuation-mdB value: 10000
				debug attr 145: adi,rf-tx-bandwidth-hz value: 18000000
				debug attr 146: adi,rf-rx-bandwidth-hz value: 18000000
				debug attr 147: adi,qec-tracking-slow-mode-enable value: 0
				debug attr 148: adi,dc-offset-count-low-range value: 50
				debug attr 149: adi,dc-offset-count-high-range value: 40
				debug attr 150: adi,dc-offset-attenuation-low-range value: 5
				debug attr 151: adi,dc-offset-attenuation-high-range value: 6
				debug attr 152: adi,dc-offset-tracking-update-event-mask value: 5
				debug attr 153: adi,clk-output-mode-select value: 0
				debug attr 154: adi,tx-lo-powerdown-managed-enable value: 1
				debug attr 155: adi,trx-synthesizer-target-fref-overwrite-hz value: 80008000
				debug attr 156: adi,rx1-rx2-phase-inversion-enable value: 0
				debug attr 157: adi,tx-rf-port-input-select-lock-enable value: 1
				debug attr 158: adi,rx-rf-port-input-select-lock-enable value: 1
				debug attr 159: adi,tx-rf-port-input-select value: 0
				debug attr 160: adi,rx-rf-port-input-select value: 0
				debug attr 161: adi,split-gain-table-mode-enable value: 0
				debug attr 162: adi,1rx-1tx-mode-use-tx-num value: 1
				debug attr 163: adi,1rx-1tx-mode-use-rx-num value: 1
				debug attr 164: adi,2rx-2tx-mode-enable value: 1
				debug attr 165: adi,digital-interface-tune-fir-disable value: 1
				debug attr 166: adi,digital-interface-tune-skip-mode value: 0
				debug attr 167: adi,tx-fastlock-pincontrol-enable value: 0
				debug attr 168: adi,rx-fastlock-pincontrol-enable value: 0
				debug attr 169: adi,rx-fastlock-delay-ns value: 0
				debug attr 170: adi,tx-fastlock-delay-ns value: 0
				debug attr 171: adi,tdd-skip-vco-cal-enable value: 0
				debug attr 172: adi,tdd-use-dual-synth-mode-enable value: 0
				debug attr 173: adi,debug-mode-enable value: 0
				debug attr 174: adi,ensm-enable-txnrx-control-enable value: 0
				debug attr 175: adi,ensm-enable-pin-pulse-mode-enable value: 0
				debug attr 176: adi,frequency-division-duplex-independent-mode-enable value: 0
				debug attr 177: adi,frequency-division-duplex-mode-enable value: 1
				debug attr 178: direct_reg_access value: 0x0
		No trigger on this device
	iio:device1: xadc
		10 channels found:
			voltage5: vccoddr (input)
			2 channel-specific attributes found:
				attr  0: raw value: 2091
				attr  1: scale value: 0.732421875
			voltage0: vccint (input)
			2 channel-specific attributes found:
				attr  0: raw value: 1410
				attr  1: scale value: 0.732421875
			voltage4: vccpaux (input)
			2 channel-specific attributes found:
				attr  0: raw value: 2485
				attr  1: scale value: 0.732421875
			temp0:  (input)
			3 channel-specific attributes found:
				attr  0: offset value: -2219
				attr  1: raw value: 2776
				attr  2: scale value: 123.040771484
			voltage7: vrefn (input)
			2 channel-specific attributes found:
				attr  0: raw value: 2
				attr  1: scale value: 0.732421875
			voltage1: vccaux (input)
			2 channel-specific attributes found:
				attr  0: raw value: 2480
				attr  1: scale value: 0.732421875
			voltage2: vccbram (input)
			2 channel-specific attributes found:
				attr  0: raw value: 1407
				attr  1: scale value: 0.732421875
			voltage3: vccpint (input)
			2 channel-specific attributes found:
				attr  0: raw value: 1400
				attr  1: scale value: 0.732421875
			voltage8:  (input)
			2 channel-specific attributes found:
				attr  0: raw value: 3729
				attr  1: scale value: 0.244140625
			voltage6: vrefp (input)
			2 channel-specific attributes found:
				attr  0: raw value: 1705
				attr  1: scale value: 0.732421875
		1 device-specific attributes found:
				attr  0: sampling_frequency value: 961538
		No trigger on this device
	iio:device2: cf-ad9361-dds-core-lpc (buffer capable)
		12 channels found:
			voltage0:  (output, index: 0, format: le:S16/16>>0)
			4 channel-specific attributes found:
				attr  0: calibphase value: 0.000000
				attr  1: calibscale value: 1.000000
				attr  2: sampling_frequency value: 30720000
				attr  3: sampling_frequency_available value: 30720000 3840000 
			voltage1:  (output, index: 1, format: le:S16/16>>0)
			4 channel-specific attributes found:
				attr  0: calibphase value: 0.000000
				attr  1: calibscale value: 1.000000
				attr  2: sampling_frequency value: 30720000
				attr  3: sampling_frequency_available value: 30720000 3840000 
			voltage2:  (output, index: 2, format: le:S16/16>>0)
			4 channel-specific attributes found:
				attr  0: calibphase value: 0.000000
				attr  1: calibscale value: 1.000000
				attr  2: sampling_frequency value: 30720000
				attr  3: sampling_frequency_available value: 30720000 3840000 
			voltage3:  (output, index: 3, format: le:S16/16>>0)
			4 channel-specific attributes found:
				attr  0: calibphase value: 0.000000
				attr  1: calibscale value: 1.000000
				attr  2: sampling_frequency value: 30720000
				attr  3: sampling_frequency_available value: 30720000 3840000 
			altvoltage3: TX1_Q_F2 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 9279985
				attr  1: phase value: 0
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 30720000
				attr  4: scale value: 0.000000
			altvoltage1: TX1_I_F2 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 9279985
				attr  1: phase value: 90000
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 30720000
				attr  4: scale value: 0.000000
			altvoltage0: TX1_I_F1 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 9279985
				attr  1: phase value: 90000
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 30720000
				attr  4: scale value: 0.000000
			altvoltage7: TX2_Q_F2 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 9279985
				attr  1: phase value: 0
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 30720000
				attr  4: scale value: 0.000000
			altvoltage6: TX2_Q_F1 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 9279985
				attr  1: phase value: 0
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 30720000
				attr  4: scale value: 0.000000
			altvoltage5: TX2_I_F2 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 9279985
				attr  1: phase value: 90000
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 30720000
				attr  4: scale value: 0.000000
			altvoltage2: TX1_Q_F1 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 9279985
				attr  1: phase value: 0
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 30720000
				attr  4: scale value: 0.000000
			altvoltage4: TX2_I_F1 (output)
			5 channel-specific attributes found:
				attr  0: frequency value: 9279985
				attr  1: phase value: 90000
				attr  2: raw value: 1
				attr  3: sampling_frequency value: 30720000
				attr  4: scale value: 0.000000
		3 buffer-specific attributes found:
				attr  0: data_available value: 0
				attr  1: length_align_bytes value: 8
				attr  2: watermark value: 2048
		1 debug attributes found:
				debug attr  0: direct_reg_access value: 0x90162
		No trigger on this device
	iio:device3: cf-ad9361-lpc (buffer capable)
		4 channels found:
			voltage0:  (input, index: 0, format: le:S12/16>>0)
			6 channel-specific attributes found:
				attr  0: calibbias value: 0
				attr  1: calibphase value: 0.000000
				attr  2: calibscale value: 1.000000
				attr  3: samples_pps ERROR: No such device (-19)
				attr  4: sampling_frequency value: 30720000
				attr  5: sampling_frequency_available value: 30720000 3840000 
			voltage1:  (input, index: 1, format: le:S12/16>>0)
			6 channel-specific attributes found:
				attr  0: calibbias value: 0
				attr  1: calibphase value: 0.000000
				attr  2: calibscale value: 1.000000
				attr  3: samples_pps ERROR: No such device (-19)
				attr  4: sampling_frequency value: 30720000
				attr  5: sampling_frequency_available value: 30720000 3840000 
			voltage2:  (input, index: 2, format: le:S12/16>>0)
			6 channel-specific attributes found:
				attr  0: calibbias value: 0
				attr  1: calibphase value: 0.000000
				attr  2: calibscale value: 1.000000
				attr  3: samples_pps ERROR: No such device (-19)
				attr  4: sampling_frequency value: 30720000
				attr  5: sampling_frequency_available value: 30720000 3840000 
			voltage3:  (input, index: 3, format: le:S12/16>>0)
			6 channel-specific attributes found:
				attr  0: calibbias value: 0
				attr  1: calibphase value: 0.000000
				attr  2: calibscale value: 1.000000
				attr  3: samples_pps ERROR: No such device (-19)
				attr  4: sampling_frequency value: 30720000
				attr  5: sampling_frequency_available value: 30720000 3840000 
		3 buffer-specific attributes found:
				attr  0: data_available value: 0
				attr  1: length_align_bytes value: 8
				attr  2: watermark value: 2048
		2 debug attributes found:
				debug attr  0: pseudorandom_err_check value: CH0 : PN9 : Out of Sync : PN Error
CH1 : PN9 : Out of Sync : PN Error
CH2 : PN9 : Out of Sync : PN Error
CH3 : PN9 : Out of Sync : PN Error
				debug attr  1: direct_reg_access value: 0x0
		No trigger on this device

[zuckschwerdt]

Thanks. Interesting, so that really is a AD9363 (2 Rx, 2 Tx) and not the AD9364 (1x1) we otherwise see.
We should be able to detect the presence of the voltage1 in/out channel and then offer the second channel automatically.

I'll try to soon get a basic PR together. I'm not likely going to buy that hardware, so you'll have to help and test several version until this works ;)

[moemuses]

I see in sdrangle they have multiple channel. it's working for me.
but the plugin is not complete and have a lot of bugs. also we can't receive IQ data from both channel at same time.

i'm thankfully and ready to test any code until it works.

[zuckschwerdt]

The branch https://github.com/pothosware/SoapyPlutoSDR/tree/feat-multichn should work now to select the second channel.
I have not checked or implemented anything for both channels at the same time yet.

[zuckschwerdt]

@moemuses did you have a chance to test the changes from branch feat-multichn?

[moemuses]

@zuckschwerdt, yes i'm ready. just tell be how exactly i can test it ?

[zuckschwerdt]

Do git clone https://github.com/pothosware/SoapyPlutoSDR.git
or change to an existing SoapyPlutoSDR folder and git fetch
then change the branch git checkout feat-multichn
now build and install as usual mkdir build ; cd build ; cmake .. && make && make install