143 lines
3.4 KiB
C
143 lines
3.4 KiB
C
/* MSPDebug - debugging tool for the eZ430
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* Copyright (C) 2009-2012 Daniel Beer
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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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 <assert.h>
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#include <stdint.h>
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#include <unistd.h>
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#include "comport.h"
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#include "util.h"
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#include "output.h"
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#include "sport.h"
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struct comport_transport {
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struct transport base;
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sport_t serial_fd;
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};
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static int serial_send(transport_t tr_base, const uint8_t *data, int len)
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{
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struct comport_transport *tr = (struct comport_transport *)tr_base;
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#ifdef DEBUG_SERIAL
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debug_hexdump("Serial transfer out:", data, len);
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#endif
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if (sport_write_all(tr->serial_fd, data, len) < 0) {
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pr_error("comport: write error");
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return -1;
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}
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return 0;
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}
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static int serial_recv(transport_t tr_base, uint8_t *data, int max_len)
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{
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struct comport_transport *tr = (struct comport_transport *)tr_base;
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int r;
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r = sport_read(tr->serial_fd, data, max_len);
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if (r < 0) {
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pr_error("comport: read error");
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return -1;
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}
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#ifdef DEBUG_SERIAL
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debug_hexdump("Serial transfer in", data, r);
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#endif
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return r;
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}
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static void serial_destroy(transport_t tr_base)
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{
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struct comport_transport *tr = (struct comport_transport *)tr_base;
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sport_close(tr->serial_fd);
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free(tr);
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}
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static int serial_flush(transport_t tr_base)
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{
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struct comport_transport *tr = (struct comport_transport *)tr_base;
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if (sport_flush(tr->serial_fd) < 0) {
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pr_error("comport: flush failed");
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return -1;
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}
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return 0;
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}
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static int serial_set_modem(transport_t tr_base, transport_modem_t state)
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{
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struct comport_transport *tr = (struct comport_transport *)tr_base;
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int bits = 0;
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if (state & TRANSPORT_MODEM_DTR)
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bits |= SPORT_MC_DTR;
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if (state & TRANSPORT_MODEM_RTS)
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bits |= SPORT_MC_RTS;
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if (sport_set_modem(tr->serial_fd, bits) < 0) {
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pr_error("comport: failed to set modem control lines\n");
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return -1;
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}
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return 0;
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}
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static const struct transport_class comport_transport = {
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.destroy = serial_destroy,
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.send = serial_send,
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.recv = serial_recv,
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.flush = serial_flush,
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.set_modem = serial_set_modem
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};
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transport_t comport_open(const char *device, int baud_rate)
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{
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struct comport_transport *tr = malloc(sizeof(*tr));
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if (!tr) {
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pr_error("comport: couldn't allocate memory");
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return NULL;
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}
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tr->base.ops = &comport_transport;
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printc_dbg("Trying to open %s at %d bps...\n", device, baud_rate);
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tr->serial_fd = sport_open(device, baud_rate, 0);
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if (SPORT_ISERR(tr->serial_fd)) {
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printc_err("comport: can't open serial device: %s: %s\n",
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device, last_error());
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free(tr);
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return NULL;
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}
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if (sport_set_modem(tr->serial_fd, 0) < 0)
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pr_error("warning: comport: failed to set "
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"modem control lines");
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return (transport_t)tr;
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}
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