diff options
Diffstat (limited to 'gsm-tvoid/src/lib')
| -rwxr-xr-x | gsm-tvoid/src/lib/Makefile.am | 2 | ||||
| -rw-r--r-- | gsm-tvoid/src/lib/cch.c | 1 | ||||
| -rw-r--r-- | gsm-tvoid/src/lib/fire_crc.c | 29 | ||||
| -rw-r--r-- | gsm-tvoid/src/lib/fire_crc.h | 31 |
4 files changed, 22 insertions, 41 deletions
diff --git a/gsm-tvoid/src/lib/Makefile.am b/gsm-tvoid/src/lib/Makefile.am index 8a84086..f4072d9 100755 --- a/gsm-tvoid/src/lib/Makefile.am +++ b/gsm-tvoid/src/lib/Makefile.am @@ -38,7 +38,7 @@ ourlib_LTLIBRARIES = _gsm.la # These are the source files that go into the shared library _gsm_la_SOURCES = \ - fire_crc. \ + fire_crc.c \ gsmstack.c \ interleave.c \ conv.c \ diff --git a/gsm-tvoid/src/lib/cch.c b/gsm-tvoid/src/lib/cch.c index 8070649..17ee4ee 100644 --- a/gsm-tvoid/src/lib/cch.c +++ b/gsm-tvoid/src/lib/cch.c @@ -419,6 +419,7 @@ static unsigned char *decode_sacch(GS_CTX *ctx, unsigned char *burst, unsigned i DEBUGF("error: sacch: parity error (%d)\n", errors); return NULL; } else { + DEBUGF("Successfully corrected parity bits!\n"); memcpy(decoded_data, crc_result, sizeof crc_result); errors = 0; } diff --git a/gsm-tvoid/src/lib/fire_crc.c b/gsm-tvoid/src/lib/fire_crc.c index ea14bcb..c9f0348 100644 --- a/gsm-tvoid/src/lib/fire_crc.c +++ b/gsm-tvoid/src/lib/fire_crc.c @@ -21,8 +21,8 @@ */ #include "fire_crc.h" -#include <math.h> -#include <iostream> +#include <stdio.h> +#include <string.h> #define REM(x, y) (x) % (y) @@ -31,7 +31,9 @@ static int FC_syndrome_shift(FC_CTX *ctx, unsigned int bit); static int outit(int *data, int len) { - for (int i = 0; i < len; i++) + int i; + + for (i = 0; i < len; i++) printf("%d ", data[i]); printf("\n"); } @@ -49,23 +51,21 @@ FC_init(FC_CTX *ctx, unsigned int crc_size, unsigned int data_size) int FC_check_crc(FC_CTX *ctx, unsigned char *input_bits, unsigned char *control_data) { - int j,error_count = 0, error_index = 0, success_flag = 0, syn_index = 0; + int j,error_count = 0, error_index = 0, success_flag = 0, syn_index = 0; + unsigned int i; - ctx->syn_start = 0; - // reset the syndrome register + ctx->syn_start = 0; + // reset the syndrome register memset(ctx->syndrome_reg, 0, sizeof ctx->syndrome_reg); - // d_syndrome_reg.clear(); - //d_syndrome_reg.insert(d_syndrome_reg.begin(),40,0); - // shift in the data bits - //for (unsigned int i=0; i < 1; i++) { - for (unsigned int i=0; i < ctx->data_size; i++) { + // shift in the data bits + for (i=0; i < ctx->data_size; i++) { error_count = FC_syndrome_shift(ctx, input_bits[i]); control_data[i] = input_bits[i]; } // shift in the crc bits - for (unsigned int i=0; i < ctx->crc_size; i++) { + for (i=0; i < ctx->crc_size; i++) { error_count = FC_syndrome_shift(ctx, 1-input_bits[i+ctx->data_size]); } @@ -125,6 +125,7 @@ static int FC_syndrome_shift(FC_CTX *ctx, unsigned int bit) { int error_count = 0; + unsigned int i; if (ctx->syn_start == 0) ctx->syn_start = 39; @@ -134,8 +135,6 @@ FC_syndrome_shift(FC_CTX *ctx, unsigned int bit) memcpy(temp_syndrome_reg, ctx->syndrome_reg, sizeof temp_syndrome_reg); - //std::vector<int> temp_syndrome_reg = ctx->syndrome_reg; - temp_syndrome_reg[REM(ctx->syn_start+3,40)] = ctx->syndrome_reg[REM(ctx->syn_start+3,40)] ^ ctx->syndrome_reg[ctx->syn_start]; @@ -170,7 +169,7 @@ FC_syndrome_shift(FC_CTX *ctx, unsigned int bit) memcpy(ctx->syndrome_reg, temp_syndrome_reg, sizeof ctx->syndrome_reg); - for (unsigned int i = 0; i < 28; i++) { + for (i = 0; i < 28; i++) { error_count = error_count + ctx->syndrome_reg[REM(ctx->syn_start+i,40)]; } return error_count; diff --git a/gsm-tvoid/src/lib/fire_crc.h b/gsm-tvoid/src/lib/fire_crc.h index 91cdee3..15d5b81 100644 --- a/gsm-tvoid/src/lib/fire_crc.h +++ b/gsm-tvoid/src/lib/fire_crc.h @@ -24,6 +24,10 @@ #ifndef INCLUDED_FIRE_CRC_H #define INCLUDED_FIRE_CRC_H +#ifdef __cplusplus +extern "C" { +#endif + typedef struct { unsigned int crc_size; @@ -35,31 +39,8 @@ typedef struct int FC_init(FC_CTX *ctx, unsigned int crc_size, unsigned int data_size); int FC_check_crc(FC_CTX *ctx, unsigned char *input_bits, unsigned char *control_data); -#if 0 -/*! - * \brief - * \ingroup - */ - -class fire_crc -{ -protected: - - unsigned int d_crc_size; - unsigned int d_data_size; - unsigned int d_syn_start; - std::vector<int> d_syndrome_reg; - -public: - - fire_crc (unsigned int crc_size, unsigned int data_size); - ~fire_crc (); - int check_crc (const std::vector<int> &input_bits, - std::vector<int> &control_bits); - int syndrome_shift (unsigned int bit); - int rem (const int x, const int y); - -}; +#ifdef __cplusplus +} #endif #endif |