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/* MSPDebug - debugging tool for the eZ430
* Copyright (C) 2009-2012 Daniel Beer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <stdint.h>
#include <unistd.h>
#include "comport.h"
#include "util.h"
#include "output.h"
#include "sport.h"
struct comport_transport {
struct transport base;
sport_t serial_fd;
};
static int serial_send(transport_t tr_base, const uint8_t *data, int len)
{
struct comport_transport *tr = (struct comport_transport *)tr_base;
#ifdef DEBUG_SERIAL
debug_hexdump("Serial transfer out:", data, len);
#endif
if (sport_write_all(tr->serial_fd, data, len) < 0) {
pr_error("comport: write error");
return -1;
}
return 0;
}
static int serial_recv(transport_t tr_base, uint8_t *data, int max_len)
{
struct comport_transport *tr = (struct comport_transport *)tr_base;
int r;
r = sport_read(tr->serial_fd, data, max_len);
if (r < 0) {
pr_error("comport: read error");
return -1;
}
#ifdef DEBUG_SERIAL
debug_hexdump("Serial transfer in", data, r);
#endif
return r;
}
static void serial_destroy(transport_t tr_base)
{
struct comport_transport *tr = (struct comport_transport *)tr_base;
sport_close(tr->serial_fd);
free(tr);
}
static int serial_flush(transport_t tr_base)
{
struct comport_transport *tr = (struct comport_transport *)tr_base;
if (sport_flush(tr->serial_fd) < 0) {
pr_error("comport: flush failed");
return -1;
}
return 0;
}
static int serial_set_modem(transport_t tr_base, transport_modem_t state)
{
struct comport_transport *tr = (struct comport_transport *)tr_base;
int bits = 0;
if (state & TRANSPORT_MODEM_DTR)
bits |= SPORT_MC_DTR;
if (state & TRANSPORT_MODEM_RTS)
bits |= SPORT_MC_RTS;
if (sport_set_modem(tr->serial_fd, bits) < 0) {
pr_error("comport: failed to set modem control lines\n");
return -1;
}
return 0;
}
static const struct transport_class comport_transport = {
.destroy = serial_destroy,
.send = serial_send,
.recv = serial_recv,
.flush = serial_flush,
.set_modem = serial_set_modem
};
transport_t comport_open(const char *device, int baud_rate)
{
struct comport_transport *tr = malloc(sizeof(*tr));
if (!tr) {
pr_error("comport: couldn't allocate memory");
return NULL;
}
tr->base.ops = &comport_transport;
printc_dbg("Trying to open %s at %d bps...\n", device, baud_rate);
tr->serial_fd = sport_open(device, baud_rate, 0);
if (SPORT_ISERR(tr->serial_fd)) {
printc_err("comport: can't open serial device: %s: %s\n",
device, last_error());
free(tr);
return NULL;
}
if (sport_set_modem(tr->serial_fd, 0) < 0)
pr_error("warning: comport: failed to set "
"modem control lines");
return (transport_t)tr;
}
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