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added docs on GPIO pins and the API 

Signed-off-by: hayati ayguen <h_ayguen@web.de>
development
hayati ayguen 2020-09-03 22:53:51 +02:00
parent 2b88e8934b
commit e5cdaf1ac9
1 changed files with 21 additions and 3 deletions
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24
include/rtl-sdr.h
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@ -565,8 +565,27 @@ RTLSDR_API int rtlsdr_set_bias_tee(rtlsdr_dev_t *dev, int on);
RTLSDR_API int rtlsdr_set_bias_tee_gpio(rtlsdr_dev_t *dev, int gpio, int on);
/* from http://lea.hamradio.si/~s57uuu/mischam/rtlsdr/ports.html
* added return of error/status */
/*
* GPIO 0 .. 7 correspond to RTL2832U's pins as follows:
* Pin information from http://lea.hamradio.si/~s57uuu/mischam/rtlsdr/ports.html
*
* GPIO0 (=pin 37): BiasT for RTL-SDR.com V3
* GPIO1 (=pin 32): usually free - on RTL-SDR.com V3's Expansion Ports
* GPIO2 (=pin 31): usually free - on RTL-SDR.com V3's Expansion Ports
* GPIO3 (=pin 36): usually free
* GPIO4 (=pin 30): RESET for Tuners FC2580 and FC0012 / on RTL-SDR.com V3's Expansion Ports
* GPIO5 (=pin 29): usually free - on RTL-SDR.com V3's Expansion Ports
* GPIO6 (=pin 22): select V-band/U-band filter for FC0012-Tuner
* GPIO7 (=pin 21): usually free
*
* CAUTION: The port pins use 3.3V logic levels and are static sensitive!
*
* most of following functions are also copied from Marko Cebokli's site
* http://lea.hamradio.si/~s57uuu/mischam/rtlsdr/ports.html
* but added return of error/status.
* GPIO numbers 'gpio' in range 0 .. 7 for the following gpio functions
* all \return negative values, on error
*/
RTLSDR_API int rtlsdr_set_gpio_output(rtlsdr_dev_t *dev, uint8_t gpio);
RTLSDR_API int rtlsdr_set_gpio_input(rtlsdr_dev_t *dev, uint8_t gpio);
@ -576,7 +595,6 @@ RTLSDR_API int rtlsdr_get_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int *val);
RTLSDR_API int rtlsdr_set_gpio_byte(rtlsdr_dev_t *dev, int val);
RTLSDR_API int rtlsdr_get_gpio_byte(rtlsdr_dev_t *dev, int *val);
/* added for testing: */
RTLSDR_API int rtlsdr_set_gpio_status(rtlsdr_dev_t *dev, int *status );