AMETEK SLM-4 - Manual (Page 61)

APPENDIX B
RS-232 PROGRAMMING EXAMPLE
C Language Interface for DOS Handlers " pd_rs232.c "
#include
#include
#include
#include
#define COMPTR 44
/* command array pointer */
#define QUELEN 1024 /* size of seriel input */
#define SUCCESS 0 /* return value variable for success */
#define OPER_ERR -1 /* operate error */
#define TIME_OUT 1 /* time_out */
int input_index = 0; /* index of seriel input buffer */
int rd_result = 0; /* return value variable of pd_rd() */
int timeout = 0; /* timeout flag */
char queue[QUELEN]; /* seriel input buffer */
int ACE_DATA_REG; /* ACIA data register */
int ACE_INT_ENB_REG; /* ACIA interrupt enable register */
int ACE_INT_IDENT_REG; /* ACIA interrupt identification register*/
int ACE_LINE_CTL_REG; /* ACIA line control register */
int ACE_MODEM_CTL_REG; /* ACIA modem control register*/
int ACE_LINE_STAT_REG; /* ACIA line status register */
int ACE_MODEM_STAT_REG; /* ACIA modem status register */
int COM_INT_NUM; /* ACIA communication port interrupt number*/
int IRQ_MASK; /* IRQ mask for PC IRQ flag */
void pd_loc(void); /* function of disable interrupt routine */
void pd_rem(void); /* function of enable interrupt routine */
int pd_init(int); /* function of initial communication port*/
int pd_wrt(char *,int); /* function of write to device */
int pd_rd(char *,int); /* function of read from device */
int read_buf(void);
int pd_meas(char *,char*, int, int);
#define PIC_CTL_REG 0x20 /* 8259A PIC control register */
#define PIC_INT_MASK_REG 0x21
/* 8259A PIC interrupt mask register */
#define NON_SPEC_EOI 0x20 /* non-spacific end of interrupt */
#define CTS 0x10 /* clear to send */
#define DSR 0x20 /* data set ready */
#define RI 0x40 /* ring indicator */
#define DCD 0x80 /* data carrier detect */
#define DCTS 1 /* delta clear to send */
#define DDSR 2 /* delta data set ready */
#define TERI 4
/* trailing edge ring detect */
#define DDCD 8 /* delta data carrier detect */
#define OE 2
/* overrun error */
M540069-01 Rev B B-1