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adxl_util.c File Reference

Common routines - open/read/close, signal handler, etc. More...

#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <signal.h>
#include <time.h>
#include <sys/termios.h>
#include <fcntl.h>
#include "nsds_util.h"
#include "flog.h"
#include "adxl_util.h"

Go to the source code of this file.

Functions
int	adxl_open (const char *COMPORT_FILE)
	Open port and configure control lines, etc.
int	adxl_read (const int COMM_FD, adxl_reading_t *result)
	Read a single set of values from the ADXL board.
int	adxl_close (const int COMM_FD)
	Simple wrapper to close the port.
void	adxl_sighandler (int signal)
	Control-break handler. Sets global flag to indicate exit request.
Variables
bool	control_break
	Global boolean set by signal handler to force exit.

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Detailed Description

Common routines - open/read/close, signal handler, etc.

Date:

5/3/03

Author:

Paul Hubbard

Definition in file adxl_util.c.

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Function Documentation

int adxl_close (  const int  COMM_FD  )

Simple wrapper to close the port. ... which releases the control lines and shuts down the DAQ. Parameters: COMM_FD  File descriptor of the opened serial port to be closed Return values: 0  Completed OK Non-zero  An error occurred Date: 3/11/02 Note: minor changes from original Definition at line 182 of file adxl_util.c. Referenced by adxl_do_work(), and daq_thread_main().

int adxl_open (  const char *  COMPORT_FILE  )

Open port and configure control lines, etc. Function to open the serial port and set up the rather peculiar comms requirements of the ADXL202: 38400 baud, N81 No flow control (?) Powered by RTS Parameters: COMPORT_FILE  Pointer to filename to open, not modified. If NULL, uses environment variable ADXL_PORT. If that's not defined, we try /dev/ttyS1 Returns: 0 Operation successful Non-zero An error occurred Definition at line 47 of file adxl_util.c. Referenced by adxl_do_work(), and daq_thread_main().

int adxl_read (  const int  COMM_FD, adxl_reading_t *  result )

Read a single set of values from the ADXL board. Parameters: COMM_FD  File descriptor of open serial port result  Pointer, used to store output Returns: 0 OK Non-zero Error occurred Note: Returns values from 0 to 100, with 50 being neutral. Definition at line 118 of file adxl_util.c. References ADXL_READ_LEN, adxl_reading_t::G, and adxl_reading_t::raw. Referenced by adxl_do_work(), and daq_thread_main().

void adxl_sighandler (  int  signal  )

Control-break handler. Sets global flag to indicate exit request. Note: Assumes installed in interrupt chain by someone else Parameters: signal  Signal number Note: Common with nees-di code, roll into library? Date: 3/25/02 Definition at line 202 of file adxl_util.c. References control_break. Referenced by main().

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Variable Documentation

bool control_break

Global boolean set by signal handler to force exit. Definition at line 26 of file adxl_util.c. Referenced by adxl_do_work(), adxl_sighandler(), daq_main_loop(), daq_thread_main(), and main().

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