mspdebug/uif.c

171 lines
3.9 KiB
C

/* MSPDebug - debugging tool for the eZ430
* Copyright (C) 2009, 2010 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 <errno.h>
#include <assert.h>
#include <stdint.h>
#include <unistd.h>
#include <termios.h>
#if defined(__linux__)
#include <linux/serial.h>
#endif
#include <sys/ioctl.h>
#include <fcntl.h>
#include "uif.h"
#include "util.h"
#include "output.h"
#if defined(__APPLE__) || defined(__OpenBSD__)
#define B460800 460800
#define B500000 500000
#endif
struct uif_transport {
struct transport base;
int serial_fd;
};
static int serial_send(transport_t tr_base, const uint8_t *data, int len)
{
struct uif_transport *tr = (struct uif_transport *)tr_base;
#ifdef DEBUG_SERIAL
debug_hexdump("Serial transfer out:", data, len);
#endif
if (write_all(tr->serial_fd, data, len) < 0) {
pr_error("uif: write error");
return -1;
}
return 0;
}
static int serial_recv(transport_t tr_base, uint8_t *data, int max_len)
{
struct uif_transport *tr = (struct uif_transport *)tr_base;
int r;
r = read_with_timeout(tr->serial_fd, data, max_len);
if (r < 0) {
pr_error("uif: 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 uif_transport *tr = (struct uif_transport *)tr_base;
close(tr->serial_fd);
free(tr);
}
#if defined(__linux__)
static int open_olimex_iso(const char *device)
{
int fd = open(device, O_RDWR | O_NOCTTY);
struct termios attr;
struct serial_struct serial_info;
if (fd < 0)
return -1;
tcgetattr(fd, &attr);
cfmakeraw(&attr);
cfsetispeed(&attr, B38400);
cfsetospeed(&attr, B38400);
serial_info.flags = ASYNC_SPD_CUST;
serial_info.custom_divisor = 120;
if (ioctl(fd, TIOCSSERIAL, &serial_info) < 0) {
printc_err("open_olimex_iso: can't do ioctl TIOCSSERIAL: %s\n",
strerror(errno));
return -1;
}
if (tcsetattr(fd, TCSAFLUSH, &attr) < 0)
return -1;
return fd;
}
#else
static int open_olimex_iso(const char *device)
{
printc_err("open_olimex_iso: this driver is only supported on "
"Linux\n");
return -1;
}
#endif
transport_t uif_open(const char *device, uif_type_t type)
{
struct uif_transport *tr = malloc(sizeof(*tr));
if (!tr) {
pr_error("uif: couldn't allocate memory");
return NULL;
}
tr->base.send = serial_send;
tr->base.recv = serial_recv;
tr->base.destroy = serial_destroy;
switch (type) {
case UIF_TYPE_FET:
printc("Trying to open UIF on %s...\n", device);
tr->serial_fd = open_serial(device, B460800);
break;
case UIF_TYPE_OLIMEX:
printc("Trying to open Olimex on %s...\n", device);
tr->serial_fd = open_serial(device, B500000);
break;
case UIF_TYPE_OLIMEX_ISO:
#if defined(__linux__)
printc("Trying to open Olimex (ISO) on %s...\n", device);
tr->serial_fd = open_olimex_iso(device);
#else
printc_err("uif_open: ioctl TIOCSSERIAL not supported on this platform\n");
#endif
break;
}
if (tr->serial_fd < 0) {
printc_err("uif: can't open serial device: %s: %s\n",
device, strerror(errno));
free(tr);
return NULL;
}
return (transport_t)tr;
}