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lib: Add GPIO version of the bias tee configuration API

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rtl_biast allows for non-default GPIO pins to be used.
Add an API call which allows for that.
This commit is contained in:
Adrian Chadd 2019-08-31 21:37:36 -07:00 committed by Steve Markgraf
parent 9d05150a64
commit 5d0735f5df
2 changed files with 19 additions and 3 deletions
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11
include/rtl-sdr.h
View File

@ -389,6 +389,17 @@ RTLSDR_API int rtlsdr_cancel_async(rtlsdr_dev_t *dev);
*/
RTLSDR_API int rtlsdr_set_bias_tee(rtlsdr_dev_t *dev, int on);
/*!
* Enable or disable the bias tee on the given GPIO pin.
*
* \param dev the device handle given by rtlsdr_open()
* \param gpio the gpio pin to configure as a Bias T control.
* \param on 1 for Bias T on. 0 for Bias T off.
* \return -1 if device is not initialized. 0 otherwise.
*/
RTLSDR_API int rtlsdr_set_bias_tee_gpio(rtlsdr_dev_t *dev, int gpio, int on);
#ifdef __cplusplus
}
#endif

11
src/librtlsdr.c
View File

@ -2009,13 +2009,18 @@ int rtlsdr_i2c_read_fn(void *dev, uint8_t addr, uint8_t *buf, int len)
return -1;
}
int rtlsdr_set_bias_tee(rtlsdr_dev_t *dev, int on)
int rtlsdr_set_bias_tee_gpio(rtlsdr_dev_t *dev, int gpio, int on)
{
if (!dev)
return -1;
rtlsdr_set_gpio_output(dev, 0);
rtlsdr_set_gpio_bit(dev, 0, on);
rtlsdr_set_gpio_output(dev, gpio);
rtlsdr_set_gpio_bit(dev, gpio, on);
return 0;
}
int rtlsdr_set_bias_tee(rtlsdr_dev_t *dev, int on)
{
return rtlsdr_set_bias_tee_gpio(dev, 0, on);
}