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DACS: ACIA Serial Driver Header File, ACIAserial.h

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ACIA Serial Driver Header File, `ACIAserial.h`

The following header file is very similar to SCIserial.c, except it provides declarations for R65C51 ACIA (Asynchronous Communications Interface Adapter) communications. This ACIA is present on the CMD-11A8 single-board computer used in the mixer unit.

/*****************************************************************************
 * DACS : Distributed Audio Control System
 *============================================================================
 *         File: ACIAserial.h
 *       Author: Stephen S. Richardson
 * Date Created: 07.14.97
 *  Environment: ICC11 v4.0, 68HC11 target
 *        Build: library
 *============================================================================
 * The code, executables, documentation, firmware images, and all related
 * material of DACS are  
 * Copyright (C) 1997 Stephen S. Richardson - ALL RIGHTS RESERVED
 *****************************************************************************
 * Source code control:
 *
 * $Id: ACIAserial.h,v 1.1 1997/07/23 22:12:31 prefect Exp prefect $
 *
 *****************************************************************************/

#ifndef _ACIAserial
#define _ACIAserial

/* ACIA port definitions (CMD11A8) */

#define ACIACTRL *(unsigned char *)(0xB5FB)
#define ACIACMD  *(unsigned char *)(0xB5FA)
#define ACIASTAT *(unsigned char *)(0xB5F9)
#define ACIADATA *(unsigned char *)(0xB5F8)


/* frame markers */
#define DLE 0x10     /* data link escape */
#define STX 0x02     /* start transmit */
#define ETX 0x03     /* end transmit */

/* buffers and lengths */

#define MAXPAYLOAD 128                     /* maximum length of the payload */
#define MAXFRLEN MAXPAYLOAD+MAXPAYLOAD+4   /* max frame length */
#define INBUFLEN MAXFRLEN+1                /* size of input buffer */
#define OUTBUFLEN MAXFRLEN+1               /* size of output buffer */


/* errors */

#define ERRTOOBIG  10         /* frame done; was too big! */

/* structures */

struct cooked_frame {          /* character stuffed frame */
  unsigned int len;
  unsigned int cur;
  unsigned char done;
  unsigned char data[MAXFRLEN];
};

struct raw_frame {             /* unstuffed frame */
  unsigned int len;
  unsigned int cur;
  unsigned char done;
  unsigned char dleflag;
  unsigned char stflag;
  unsigned char data[MAXPAYLOAD];
};

int ACIA_poll_in (unsigned char *c);
char ACIA_block_in (void);
void ACIA_chout (unsigned char ch);
void ACIA_out (char *s);
void ACIA_init (void);
void ACIA_prep_raw (struct raw_frame *raw);
void ACIA_prep_cooked (struct cooked_frame *cooked);
void ACIA_data_to_cooked (char *data, int len, struct cooked_frame *cooked);
int ACIA_service (struct raw_frame *inraw, struct cooked_frame *outfr);

#endif

Steve Richardson 2000-07-06

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