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/*
* Copyright (c) 2011 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/shell.h>
#include <termios.h>
#include <unistd.h>
static rtems_status_code change_serial_settings(int fd, struct termios *term)
{
rtems_status_code sc = RTEMS_UNSATISFIED;
int rv = tcgetattr(fd, term);
if (rv == 0) {
struct termios new_term = *term;
new_term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
new_term.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
new_term.c_cflag &= ~(CSIZE | PARENB);
new_term.c_cflag |= CS8;
new_term.c_cc [VMIN] = 0;
new_term.c_cc [VTIME] = 10;
rv = tcsetattr(fd, TCSANOW, &new_term);
if (rv == 0) {
sc = RTEMS_SUCCESSFUL;
}
}
return sc;
}
static rtems_status_code restore_serial_settings(int fd, struct termios *term)
{
int rv = tcsetattr(fd, TCSANOW, term);
return rv == 0 ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED;
}
rtems_status_code rtems_shell_wait_for_input(
int fd,
int timeout_in_seconds,
rtems_shell_wait_for_input_notification notification,
void *notification_arg
)
{
struct termios term;
rtems_status_code sc = change_serial_settings(fd, &term);
if (sc == RTEMS_SUCCESSFUL) {
bool input_detected = false;
int i = 0;
for (i = 0; i < timeout_in_seconds && !input_detected; ++i) {
char c;
(*notification)(fd, timeout_in_seconds - i, notification_arg);
input_detected = read(fd, &c, sizeof(c)) > 0;
}
sc = restore_serial_settings(fd, &term);
if (sc == RTEMS_SUCCESSFUL) {
sc = input_detected ? RTEMS_SUCCESSFUL : RTEMS_TIMEOUT;
}
}
return sc;
}
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