Reader_Header


Data Structures

struct  BC_STRUCT
 Barcode sample/decode context. More...

Files

file  reader.h
 Reader Header File.

Enumerations

enum  {
  NO_DATA, CODE39_DATA, CODABAR_DATA, CODEI25_DATA,
  MAG1_DATA, MAG2_DATA, MAG3_DATA, PROX_DATA
}

Functions

void reader1_init (void)
void reader2_init (void)
void barcodeSample (struct BC_STRUCT *p, unsigned int count)
 General purpose barcode sampling.
void magstripeSample (struct BC_STRUCT *p, unsigned char value)
void wiegandSample (struct BC_STRUCT *p, unsigned char value)
void barcodeOverflow (struct BC_STRUCT *p)
 Barcode sample overflow.
void magstripeOverflow (struct BC_STRUCT *p)
void wiegandOverflow (struct BC_STRUCT *p)
unsigned short barcode_decode (struct BC_STRUCT *p)
unsigned short Decode39 (struct BC_STRUCT *p)
unsigned short DecodeCodabar (struct BC_STRUCT *p)
unsigned short DecodeI25 (struct BC_STRUCT *p, unsigned char len)
unsigned short wiegand_decode (struct BC_STRUCT *p)
unsigned short DecodeWiegand (struct BC_STRUCT *p, struct prox_cfg_struct *w)

Variables

unsigned char symbol
unsigned char DecodeBarcodeReady0
unsigned char DecodeBarcodeReady1
unsigned char DecodeMagstripeReady0
unsigned char DecodeMagstripeReady1
unsigned char DecodeWiegandReady0
unsigned char DecodeWiegandReady1
struct BC_STRUCT Reader0
struct BC_STRUCT Reader1

Enumeration Type Documentation

anonymous enum

Enumerator:
NO_DATA 
CODE39_DATA 
CODABAR_DATA 
CODEI25_DATA 
MAG1_DATA 
MAG2_DATA 
MAG3_DATA 
PROX_DATA 

Definition at line 67 of file reader.h.

00067 {NO_DATA, CODE39_DATA, CODABAR_DATA, CODEI25_DATA, MAG1_DATA, MAG2_DATA, MAG3_DATA, PROX_DATA};

Function Documentation

unsigned short barcode_decode ( struct BC_STRUCT *  p  ) 

void barcodeOverflow ( struct BC_STRUCT *  p  ) 

Barcode sample overflow.

Parameters:
*p points to channel context
Returns:
None

Definition at line 113 of file barcode_sample.c.

References BC_STRUCT::sample_ctr, BC_STRUCT::sample_ptr, and BC_STRUCT::sample_state.

00113                                          {
00114 
00115     // Abort if less than the minimum required samples
00116     if(p->sample_ctr < MIN_BARCODE_SAMPLES){
00117         p->sample_state = WAITING;
00118     }
00119 
00120     // Store the overflow count and flag as ready               
00121     else{
00122         *p->sample_ptr++ = 0;
00123         p->sample_state = READY;
00124     }
00125 }

void barcodeSample ( struct BC_STRUCT *  p,
unsigned int  count 
)

General purpose barcode sampling.

Parameters:
*p points to channel context
count is sample count
Returns:
None

Definition at line 72 of file barcode_sample.c.

References BC_STRUCT::overflow_ctr, BC_STRUCT::sample_buffer, BC_STRUCT::sample_ctr, BC_STRUCT::sample_ptr, and BC_STRUCT::sample_state.

00073 {
00074     // Leave if sample is already available
00075     if(p->sample_state == READY){
00076         return;
00077     }
00078 
00079     // Arm overflow counter
00080     p->overflow_ctr = BARCODE_OVERFLOW_TIME;
00081 
00082     // Initialize if just starting
00083     if(p->sample_state != BUSY){
00084         p->sample_ctr = 0;
00085         p->sample_ptr = p->sample_buffer;
00086         p->sample_state = BUSY;
00087         return;
00088     }
00089 
00090     // Already Sampling
00091 
00092     // Buffer full?
00093     if(p->sample_ctr++ >= (sizeof p->sample_buffer / 2) - 1){
00094 
00095         // Kill the sampling
00096         p->sample_ctr = 0;
00097         p->overflow_ctr = 1;
00098         p->sample_state = WAITING;
00099         return;
00100     }
00101 
00102     // Store the count
00103     *p->sample_ptr++ = count;
00104 }

unsigned short Decode39 ( struct BC_STRUCT *  p  ) 

unsigned short DecodeCodabar ( struct BC_STRUCT *  p  ) 

unsigned short DecodeI25 ( struct BC_STRUCT *  p,
unsigned char  len 
)

unsigned short DecodeWiegand ( struct BC_STRUCT *  p,
struct prox_cfg_struct *  w 
)

void magstripeOverflow ( struct BC_STRUCT *  p  ) 

void magstripeSample ( struct BC_STRUCT *  p,
unsigned char  value 
)

void reader1_init ( void   ) 

void reader2_init ( void   ) 

unsigned short wiegand_decode ( struct BC_STRUCT *  p  ) 

void wiegandOverflow ( struct BC_STRUCT *  p  ) 

void wiegandSample ( struct BC_STRUCT *  p,
unsigned char  value 
)

Variable Documentation

unsigned char DecodeBarcodeReady0

unsigned char DecodeBarcodeReady1

unsigned char DecodeMagstripeReady0

unsigned char DecodeMagstripeReady1

unsigned char DecodeWiegandReady0

unsigned char DecodeWiegandReady1

struct BC_STRUCT Reader0

struct BC_STRUCT Reader1

unsigned char symbol

Download Source Code