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di194.h

Go to the documentation of this file.

#ifndef _DI194_H_
#define _DI194_H_

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <sys/errno.h>
#include <sys/times.h>
#include <sys/termios.h>
#include <fcntl.h>
#include <stdint.h>
#include <time.h>
#include <signal.h>
#include <stdbool.h>

// ---------------------------------------------------------------------
// Local defines, structs, etc.

typedef enum 
{
    DI_RATE_INVALID,
    DI_RATE_60HZ,
    DI_RATE_120HZ,
    DI_RATE_240HZ,
    DI_RATE_UNKNOWN 
} di_rate_t;

typedef struct 
{
    float       analog[4];
    uint16_t    raw[4];
    bool        digital[3];
    bool        is_valid;
} daq_reading_t;

typedef uint8_t   daq_buf_t[8];

#if !defined(SERIAL_NUM_LEN)
#define SERIAL_NUM_LEN 10
#endif

// Function prototypes
int di_serial_init(const char *COMPORT_FILE);
int min(const int A, const int B);
void hex_print_byte(const uint8_t in_byte);
int di_serial_read(const int COMM_FD, const uint8_t *buf,
                   const int READ_LEN, const time_t TIMEOUT);
void di_cmd_print(const uint8_t *cmd, const int CMD_LEN);
bool is_reset_cmd(const uint8_t *cmd, const int CMD_LEN);
int di_daq_sync(const int COMM_FD);
int di_cmd_send(const int COMM_FD, const uint8_t *cmd, const int CMD_LEN);
int di_initialize(const int COMM_FD, int *num_bits);
int di_configure(const int COMM_FD);
int di_buf_decode(const daq_buf_t buf, daq_reading_t *result, 
                  const int NUM_BITS);
int di_buf_validate(const daq_buf_t buf);
char *di_byte_print(const uint8_t in_byte);

// User-called functions
int di_open(const char *COMPORT_FILE, int *num_bits);
int di_close(const int COMM_FD);
int di_read(const int COMM_FD, daq_reading_t *data, const int NUM_BITS);
int di_start(const int COMM_FD);
int di_stop(const int COMM_FD);
int di_reset(const int COMM_FD);
int di_serial_num(const int COMM_FD, char *ser_buf);
int di_read_single(const int COMM_FD, daq_reading_t *data, const int NUM_BITS);

#endif /* _DI194_H_ */

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