237 lines
4.4 KiB
C
237 lines
4.4 KiB
C
/*
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* avrdude - A Downloader/Uploader for AVR device programmers
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* Copyright (C) 2000-2004 Brian S. Dean <bsd@bsdhome.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* $Id$ */
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#if !defined(WIN32NATIVE)
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#include "ac_cfg.h"
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#if HAVE_PARPORT
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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# include "freebsd_ppi.h"
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#elif defined(__linux__)
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# include "linux_ppdev.h"
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#elif defined(__sun__) || defined(__sun) /* Solaris */
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# include "solaris_ecpp.h"
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#endif
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#include "avrdude.h"
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#include "libavrdude.h"
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#include "ppi.h"
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enum {
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PPI_READ,
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PPI_WRITE,
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PPI_SHADOWREAD
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};
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static int ppi_shadow_access(union filedescriptor *fdp, int reg,
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unsigned char *v, unsigned char action)
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{
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static unsigned char shadow[3];
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int shadow_num;
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switch (reg) {
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case PPIDATA:
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shadow_num = 0;
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break;
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case PPICTRL:
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shadow_num = 1;
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break;
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case PPISTATUS:
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shadow_num = 2;
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break;
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default:
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avrdude_message(MSG_INFO, "%s: avr_set(): invalid register=%d\n",
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progname, reg);
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return -1;
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break;
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}
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switch (action) {
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case PPI_SHADOWREAD:
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*v = shadow[shadow_num];
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break;
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case PPI_READ:
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DO_PPI_READ(fdp->ifd, reg, v);
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shadow[shadow_num]=*v;
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break;
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case PPI_WRITE:
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shadow[shadow_num]=*v;
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DO_PPI_WRITE(fdp->ifd, reg, v);
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break;
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}
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return 0;
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}
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/*
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* set the indicated bit of the specified register.
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*/
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int ppi_set(union filedescriptor *fdp, int reg, int bit)
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{
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unsigned char v;
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int rc;
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rc = ppi_shadow_access(fdp, reg, &v, PPI_SHADOWREAD);
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v |= bit;
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rc |= ppi_shadow_access(fdp, reg, &v, PPI_WRITE);
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if (rc)
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return -1;
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return 0;
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}
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/*
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* clear the indicated bit of the specified register.
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*/
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int ppi_clr(union filedescriptor *fdp, int reg, int bit)
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{
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unsigned char v;
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int rc;
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rc = ppi_shadow_access(fdp, reg, &v, PPI_SHADOWREAD);
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v &= ~bit;
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rc |= ppi_shadow_access(fdp, reg, &v, PPI_WRITE);
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if (rc)
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return -1;
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return 0;
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}
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/*
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* get the indicated bit of the specified register.
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*/
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int ppi_get(union filedescriptor *fdp, int reg, int bit)
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{
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unsigned char v;
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int rc;
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rc = ppi_shadow_access(fdp, reg, &v, PPI_READ);
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v &= bit;
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if (rc)
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return -1;
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return v; /* v == bit */
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}
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/*
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* toggle the indicated bit of the specified register.
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*/
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int ppi_toggle(union filedescriptor *fdp, int reg, int bit)
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{
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unsigned char v;
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int rc;
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rc = ppi_shadow_access(fdp, reg, &v, PPI_SHADOWREAD);
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v ^= bit;
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rc |= ppi_shadow_access(fdp, reg, &v, PPI_WRITE);
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if (rc)
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return -1;
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return 0;
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}
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/*
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* get all bits of the specified register.
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*/
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int ppi_getall(union filedescriptor *fdp, int reg)
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{
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unsigned char v;
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int rc;
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rc = ppi_shadow_access(fdp, reg, &v, PPI_READ);
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if (rc)
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return -1;
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return v; /* v == bit */
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}
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/*
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* set all bits of the specified register to val.
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*/
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int ppi_setall(union filedescriptor *fdp, int reg, int val)
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{
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unsigned char v;
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int rc;
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v = val;
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rc = ppi_shadow_access(fdp, reg, &v, PPI_WRITE);
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if (rc)
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return -1;
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return 0;
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}
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void ppi_open(char * port, union filedescriptor *fdp)
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{
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int fd;
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unsigned char v;
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fd = open(port, O_RDWR);
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if (fd < 0) {
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avrdude_message(MSG_INFO, "%s: can't open device \"%s\": %s\n",
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progname, port, strerror(errno));
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fdp->ifd = -1;
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return;
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}
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ppi_claim (fd);
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/*
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* Initialize shadow registers
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*/
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ppi_shadow_access (fdp, PPIDATA, &v, PPI_READ);
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ppi_shadow_access (fdp, PPICTRL, &v, PPI_READ);
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ppi_shadow_access (fdp, PPISTATUS, &v, PPI_READ);
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fdp->ifd = fd;
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}
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void ppi_close(union filedescriptor *fdp)
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{
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ppi_release (fdp->ifd);
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close(fdp->ifd);
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}
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#endif /* HAVE_PARPORT */
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#endif /* !WIN32NATIVE */
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