[PATCH] RTL-SDR Blog V4 Upconverter GPIO Switch

In future blog v4 production batches (out in several months time), it will be possible to turn off the upconverter when tuned outside of the HF bands. Please add the code to control the GPIOs to turn off the upconverter when it is not in use. diff --git a/src/tuner_r82xx.c b/src/tuner_r82xx.c index 1510fc3..38d4802 100644 --- a/src/tuner_r82xx.c +++ b/src/tuner_r82xx.c @@ -1151,6 +1151,12 @@ int r82xx_set_freq(struct r82xx_priv *priv, uint32_t freq) cable_2_in = (band == HF) ? 0x08 : 0x00; rc = r82xx_write_reg_mask(priv, 0x06, cable_2_in, 0x08); + if (rc < 0) + goto err; + + /* Control upconverter GPIO switch on newer batches */ + rc = rtlsdr_set_bias_tee_gpio(priv->rtl_dev, 5, !cable_2_in); + if (rc < 0) goto err; Regards, Carl