Bias-T checkbox for RTL-SDR device settings screen

src/urh/dev/config.py

@@ -99,7 +99,8 @@
     "bandwidth": dev_range(start=1, stop=int(3.2 * M), step=1),
     "rx_rf_gain": list(range(-100, 500)),
     "direct_sampling": ["disabled", "I-ADC input enabled", "Q-ADC input enabled"],
-    "freq_correction": dev_range(start=-1 * 10 ** 3, stop=1 * 10 ** 3, step=1)
+    "freq_correction": dev_range(start=-1 * 10 ** 3, stop=1 * 10 ** 3, step=1),
+    "bias_tee_enabled": [False, True]
 }
 
 DEVICE_CONFIG["RTL-TCP"] = copy.deepcopy(DEVICE_CONFIG["RTL-SDR"])

src/urh/dev/native/RTLSDR.py

@@ -18,7 +18,8 @@ class RTLSDR(Device):
         Device.Command.SET_RF_GAIN.name+"_get_allowed_values": "get_tuner_gains",
         Device.Command.SET_BANDWIDTH.name: "set_tuner_bandwidth",
         Device.Command.SET_FREQUENCY_CORRECTION.name: "set_freq_correction",
-        Device.Command.SET_DIRECT_SAMPLING_MODE.name: "set_direct_sampling"
+        Device.Command.SET_DIRECT_SAMPLING_MODE.name: "set_direct_sampling",
+        Device.Command.SET_BIAS_TEE_ENABLED.name: "set_bias_tee"
     })
 
     DATA_TYPE = np.int8
@@ -77,6 +78,7 @@ def device_parameters(self):
                             (self.Command.SET_FREQUENCY_CORRECTION.name, self.freq_correction),
                             (self.Command.SET_DIRECT_SAMPLING_MODE.name, self.direct_sampling_mode),
                             (self.Command.SET_RF_GAIN.name, self.gain),
+                            (self.Command.SET_BIAS_TEE_ENABLED.name, self.bias_tee_enabled),
                             ("identifier", self.device_number)])
 
     @property

src/urh/dev/native/lib/crtlsdr.pxd

@@ -69,3 +69,5 @@ cdef extern from "rtl-sdr.h":
 
     int rtlsdr_read_async(rtlsdr_dev_t *dev, rtlsdr_read_async_cb_t cb, void *ctx, uint32_t buf_num, uint32_t buf_len);
     int rtlsdr_cancel_async(rtlsdr_dev_t *dev)
+
+    int rtlsdr_set_bias_tee(rtlsdr_dev_t *dev, int on)

src/urh/dev/native/lib/rtlsdr.pyx

@@ -332,3 +332,11 @@ cpdef int cancel_async():
     :return: 0 on success
     """
     return crtlsdr.rtlsdr_cancel_async(_c_device)
+
+cpdef int set_bias_tee(int on):
+    """
+    Enable or disable the bias tee on GPIO PIN 0.
+
+    return -1 if device is not initialized. 0 otherwise.
+    """
+    return crtlsdr.rtlsdr_set_bias_tee (_c_device, on)