[rtl-sdr patch?] lib: retry i2c on failure

Steve Markgraf steve at steve-m.de
Wed Oct 2 20:26:17 UTC 2019


Hi,

On 02.10.19 08:25, Fab Stz wrote:
> When doing a setFrequency I usually have this error afterwards and the 
> frequency is actually not changed
> 
> rtlsdr_demod_write_reg failed with -9
> r82xx_write: i2c wr failed=-9 reg=17 len=1
> r82xx_set_freq: failed=-9

This is weird, I haven't seen this issue before. Which USB host
controller are you using, which OS and which version of libusb?

-9 is LIBUSB_ERROR_PIPE, which means that the device probably sent a
STALL, which again is very weird given that this issue never occured
before for multiple users in the past.

How often does this problem occur?

Best Regards,
Steve


More information about the osmocom-sdr mailing list