218 lines
3.7 KiB
C
218 lines
3.7 KiB
C
/*
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* avrdude - A Downloader/Uploader for AVR device programmers
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* Copyright (C) 2000, 2001, 2002, 2003 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* $Id$ */
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#if defined(__FreeBSD__) || defined(__linux__)
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#include "ac_cfg.h"
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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__)
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#include <dev/ppbus/ppi.h>
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#elif defined(__linux__)
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#include "linux_ppdev.h"
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#endif
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#include "avr.h"
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#include "pindefs.h"
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#include "pgm.h"
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#include "ppi.h"
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extern char * progname;
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/*
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* set 'get' and 'set' appropriately for subsequent passage to ioctl()
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* to get/set the specified PPI registers.
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*/
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static int ppi_getops(int reg, unsigned long * get, unsigned long * set)
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{
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switch (reg) {
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case PPIDATA:
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*set = PPISDATA;
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*get = PPIGDATA;
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break;
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case PPICTRL:
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*set = PPISCTRL;
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*get = PPIGCTRL;
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break;
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case PPISTATUS:
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*set = PPISSTATUS;
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*get = PPIGSTATUS;
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break;
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default:
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fprintf(stderr, "%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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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(int fd, int reg, int bit)
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{
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unsigned char v;
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unsigned long get, set;
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int rc;
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rc = ppi_getops(reg, &get, &set);
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if (rc)
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return -1;
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ioctl(fd, get, &v);
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v |= bit;
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ioctl(fd, set, &v);
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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(int fd, int reg, int bit)
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{
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unsigned char v;
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unsigned long get, set;
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int rc;
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rc = ppi_getops(reg, &get, &set);
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if (rc)
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return -1;
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ioctl(fd, get, &v);
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v &= ~bit;
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ioctl(fd, set, &v);
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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(int fd, int reg, int bit)
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{
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unsigned char v;
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unsigned long get, set;
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int rc;
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rc = ppi_getops(reg, &get, &set);
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if (rc)
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return -1;
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ioctl(fd, get, &v);
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v &= bit;
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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(int fd, int reg, int bit)
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{
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unsigned char v;
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unsigned long get, set;
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int rc;
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rc = ppi_getops(reg, &get, &set);
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if (rc)
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return -1;
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ioctl(fd, get, &v);
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v ^= bit;
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ioctl(fd, set, &v);
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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(int fd, int reg)
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{
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unsigned char v;
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unsigned long get, set;
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int rc;
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rc = ppi_getops(reg, &get, &set);
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if (rc)
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return -1;
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ioctl(fd, get, &v);
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return (int)v;
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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(int fd, int reg, int val)
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{
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unsigned char v;
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unsigned long get, set;
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int rc;
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rc = ppi_getops(reg, &get, &set);
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if (rc)
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return -1;
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v = val;
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ioctl(fd, set, &v);
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return 0;
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}
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int ppi_open(char * port)
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{
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int fd;
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fd = open(port, O_RDWR);
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if (fd < 0) {
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fprintf(stderr, "%s: can't open device \"%s\": %s\n",
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progname, port, strerror(errno));
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return -1;
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}
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return fd;
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}
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void ppi_close(int fd)
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{
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close(fd);
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}
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#endif
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