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Enable EEPROM to force direct sampling mode

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Re-purpose remote-enabled EEPROM flag to determine if direct sampling mode should be forced ON. Useful for apps that don't have any direct sampling mode settings in their GUI.
master
rtlsdrblog 5 years ago committed by GitHub
parent 8a3d6a919f
commit 4f6c1b2e98
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 13 additions and 8 deletions
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  1. 21
      src/librtlsdr.c

21
src/librtlsdr.c
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@ -126,6 +126,7 @@ struct rtlsdr_dev {
int driver_active; int driver_active;
unsigned int xfer_errors; unsigned int xfer_errors;
int force_bt; int force_bt;
int force_ds;
}; };
void rtlsdr_set_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int val); void rtlsdr_set_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int val);
@ -1175,6 +1176,8 @@ int rtlsdr_set_direct_sampling(rtlsdr_dev_t *dev, int on)
if (!dev) if (!dev)
return -1; return -1;
if(dev->force_ds) on = 2;
if (on) { if (on) {
if (dev->tuner && dev->tuner->exit) { if (dev->tuner && dev->tuner->exit) {
rtlsdr_set_i2c_repeater(dev, 1); rtlsdr_set_i2c_repeater(dev, 1);
@ -1247,11 +1250,12 @@ int rtlsdr_set_offset_tuning(rtlsdr_dev_t *dev, int on)
if (!dev) if (!dev)
return -1; return -1;
// RTL-SDR-BLOG Hack, enables us to turn on the bias tee by clicking on "offset tuning" in software that doesn't have specified bias tee support.
// Offset tuning is not used for R820T devices so it is no problem.
rtlsdr_set_gpio(dev, 0, on);
if ((dev->tuner_type == RTLSDR_TUNER_R820T) || if ((dev->tuner_type == RTLSDR_TUNER_R820T) ||
(dev->tuner_type == RTLSDR_TUNER_R828D)) (dev->tuner_type == RTLSDR_TUNER_R828D))
// RTL-SDR-BLOG Hack, enables us to turn on the bias tee by clicking on "offset tuning" in software that doesn't have specified bias tee support.
// Offset tuning is not used for R820T devices so it is no problem.
rtlsdr_set_gpio(dev, 0, on);
return -2; return -2;
if (dev->direct_sampling) if (dev->direct_sampling)
@ -1619,18 +1623,20 @@ found:
break; break;
case RTLSDR_TUNER_UNKNOWN: case RTLSDR_TUNER_UNKNOWN:
fprintf(stderr, "No supported tuner found\n"); fprintf(stderr, "No supported tuner found\n");
rtlsdr_set_direct_sampling(dev, 1); rtlsdr_set_direct_sampling(dev, 2);
break; break;
default: default:
break; break;
} }
/* Hack to force the Bias T to always be on if we set the IR-Endpoint bit in the EEPROM to 0. */ /* Hack to force the Bias T to always be on if we set the IR-Endpoint bit in the EEPROM to 0. Default on EEPROM is 1. */
//force_bt = 0;
r = rtlsdr_read_eeprom(dev, buf, 0, EEPROM_SIZE); r = rtlsdr_read_eeprom(dev, buf, 0, EEPROM_SIZE);
dev->force_bt = (buf[7] & 0x02) ? 0 : 1; dev->force_bt = (buf[7] & 0x02) ? 0 : 1;
if(dev->force_bt) rtlsdr_set_gpio(dev, 0, 1); if(dev->force_bt) rtlsdr_set_gpio(dev, 0, 1);
/* Hack to force direct sampling mode to always be on if we set the remote-enabled bit in the EEPROM to 1. Default on EEPROM is 0. */
dev->force_ds = (buf[7] & 0x01) ? 1 : 0;
if(dev->force_ds) dev->tuner_type = RTLSDR_TUNER_UNKNOWN;
if (dev->tuner->init) if (dev->tuner->init)
@ -2049,4 +2055,3 @@ int rtlsdr_set_gpio(rtlsdr_dev_t *dev, int gpio_pin, int on)
return 1; return 1;
} }

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