diff options
| author | Mike Walters <mike@flomp.net> | 2020-08-05 21:06:25 +0100 |
|---|---|---|
| committer | Eric Wild <ewild@sysmocom.de> | 2020-08-09 14:48:49 +0200 |
| commit | bd668e97b632e68a131df738cc5aee49fc9df3e4 (patch) | |
| tree | 0b16db0f9e01f36642c94bc48248bd91ebcf76cb | |
| parent | 911082ff85dd3bdff986b8928b041644b3824e72 (diff) | |
HackRF: fix hackrf_source signednessv0.2.2
The LUT changes in 2e7d343fed inadvertently started interpreting samples
as unsigned. This change puts it back to signed (and fixes an outdated
comment).
Signed-off-by: Eric Wild <ewild@sysmocom.de>
| -rw-r--r-- | lib/hackrf/hackrf_common.h | 2 | ||||
| -rw-r--r-- | lib/hackrf/hackrf_source_c.cc | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/lib/hackrf/hackrf_common.h b/lib/hackrf/hackrf_common.h index ea093b9..bb553c3 100644 --- a/lib/hackrf/hackrf_common.h +++ b/lib/hackrf/hackrf_common.h @@ -34,7 +34,7 @@ #define BUF_LEN (16 * 32 * 512) /* must be multiple of 512 */ #define BUF_NUM 15 -#define BYTES_PER_SAMPLE 2 /* HackRF device produces/consumes 8 bit unsigned IQ data */ +#define BYTES_PER_SAMPLE 2 /* HackRF device produces/consumes 8 bit signed IQ data */ #define HACKRF_FORMAT_ERROR(ret, msg) \ boost::str( boost::format(msg " (%1%) %2%") \ diff --git a/lib/hackrf/hackrf_source_c.cc b/lib/hackrf/hackrf_source_c.cc index 4f2fb78..662d04a 100644 --- a/lib/hackrf/hackrf_source_c.cc +++ b/lib/hackrf/hackrf_source_c.cc @@ -88,7 +88,7 @@ hackrf_source_c::hackrf_source_c (const std::string &args) // create a lookup table for gr_complex values for (unsigned int i = 0; i <= 0xff; i++) { - _lut.push_back( float(i) * (1.0f/128.0f) ); + _lut.push_back( float(int8_t(i)) * (1.0f/128.0f) ); } if ( BUF_NUM != _buf_num || BUF_LEN != _buf_len ) { |