diff options
| author | Harald Welte <laforge@gnumonks.org> | 2017-06-18 18:16:02 +0300 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2017-07-10 23:42:02 +0200 |
| commit | 1389e86d116509884b0e5ee3421fe7683afcab9b (patch) | |
| tree | 52ef42f5f49ac3ae52e687cbc7207426fd11e075 /include | |
| parent | 548e3712009f68f801be806884d848b47c30dced (diff) | |
Add pseudo-random bit sequence generator to libosmcoore
These PRBS sequences are specified in ITU-T O.150. They are typically
used as test data to be transmitted for BER (bit error rate) testing.
Change-Id: I227b6a6e86a251460ecb816afa9a7439d5fb94d1
Diffstat (limited to 'include')
| -rw-r--r-- | include/Makefile.am | 1 | ||||
| -rw-r--r-- | include/osmocom/core/prbs.h | 25 |
2 files changed, 26 insertions, 0 deletions
diff --git a/include/Makefile.am b/include/Makefile.am index e0c1a2bd..4e92d553 100644 --- a/include/Makefile.am +++ b/include/Makefile.am @@ -31,6 +31,7 @@ nobase_include_HEADERS = \ osmocom/core/macaddr.h \ osmocom/core/msgb.h \ osmocom/core/panic.h \ + osmocom/core/prbs.h \ osmocom/core/prim.h \ osmocom/core/process.h \ osmocom/core/rate_ctr.h \ diff --git a/include/osmocom/core/prbs.h b/include/osmocom/core/prbs.h new file mode 100644 index 00000000..aaca17d9 --- /dev/null +++ b/include/osmocom/core/prbs.h @@ -0,0 +1,25 @@ +#pragma once +#include <stdint.h> +#include <osmocom/core/bits.h> + +/*! \brief definition of a PRBS sequence */ +struct osmo_prbs { + const char *name; /*!< human-readable name */ + unsigned int len; /*!< length in bits */ + uint64_t coeff; /*!< coefficients */ +}; + +/*! \brief state of a given PRBS sequence generator */ +struct osmo_prbs_state { + const struct osmo_prbs *prbs; + uint64_t state; +}; + +extern const struct osmo_prbs osmo_prbs7; +extern const struct osmo_prbs osmo_prbs9; +extern const struct osmo_prbs osmo_prbs11; +extern const struct osmo_prbs osmo_prbs15; + +void osmo_prbs_state_init(struct osmo_prbs_state *st, const struct osmo_prbs *prbs); +ubit_t osmo_prbs_get_ubit(struct osmo_prbs_state *state); +int osmo_prbs_get_ubits(ubit_t *out, unsigned int out_len, struct osmo_prbs_state *state); |