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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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 3 of the License, or
(at your option) any later version.
ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
*/
/**
* @file Posix/serial_lld.c
* @brief Posix low level simulated serial driver code.
*
* @addtogroup POSIX_SERIAL
* @{
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/ioctl.h>
#include "ch.h"
#include "hal.h"
#if HAL_USE_SERIAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/** @brief Serial driver 1 identifier.*/
#if USE_SIM_SERIAL1 || defined(__DOXYGEN__)
SerialDriver SD1;
#endif
/** @brief Serial driver 2 identifier.*/
#if USE_SIM_SERIAL2 || defined(__DOXYGEN__)
SerialDriver SD2;
#endif
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/** @brief Driver default configuration.*/
static const SerialConfig default_config = {
};
static u_long nb = 1;
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
static void init(SerialDriver *sdp, uint16_t port) {
struct sockaddr_in sad;
struct protoent *prtp;
if ((prtp = getprotobyname("tcp")) == NULL) {
printf("%s: Error mapping protocol name to protocol number\n", sdp->com_name);
goto abort;
}
sdp->com_listen = socket(PF_INET, SOCK_STREAM, prtp->p_proto);
if (sdp->com_listen == INVALID_SOCKET) {
printf("%s: Error creating simulator socket\n", sdp->com_name);
goto abort;
}
if (ioctl(sdp->com_listen, FIONBIO, &nb) != 0) {
printf("%s: Unable to setup non blocking mode on socket\n", sdp->com_name);
goto abort;
}
memset(&sad, 0, sizeof(sad));
sad.sin_family = AF_INET;
sad.sin_addr.s_addr = INADDR_ANY;
sad.sin_port = htons(port);
if (bind(sdp->com_listen, (struct sockaddr *)&sad, sizeof(sad))) {
printf("%s: Error binding socket\n", sdp->com_name);
goto abort;
}
if (listen(sdp->com_listen, 1) != 0) {
printf("%s: Error listening socket\n", sdp->com_name);
goto abort;
}
printf("Full Duplex Channel %s listening on port %d\n", sdp->com_name, port);
return;
abort:
if (sdp->com_listen != INVALID_SOCKET)
close(sdp->com_listen);
exit(1);
}
static bool_t connint(SerialDriver *sdp) {
if (sdp->com_data == INVALID_SOCKET) {
struct sockaddr addr;
socklen_t addrlen = sizeof(addr);
if ((sdp->com_data = accept(sdp->com_listen, &addr, &addrlen)) == INVALID_SOCKET)
return FALSE;
if (ioctl(sdp->com_data, FIONBIO, &nb) != 0) {
printf("%s: Unable to setup non blocking mode on data socket\n", sdp->com_name);
goto abort;
}
chIOAddFlagsI(sdp, IO_CONNECTED);
return TRUE;
}
return FALSE;
abort:
if (sdp->com_listen != INVALID_SOCKET)
close(sdp->com_listen);
if (sdp->com_data != INVALID_SOCKET)
close(sdp->com_data);
exit(1);
}
static bool_t inint(SerialDriver *sdp) {
if (sdp->com_data != INVALID_SOCKET) {
int i;
uint8_t data[32];
/*
* Input.
*/
int n = recv(sdp->com_data, data, sizeof(data), 0);
switch (n) {
case 0:
close(sdp->com_data);
sdp->com_data = INVALID_SOCKET;
chIOAddFlagsI(sdp, IO_DISCONNECTED);
return FALSE;
case INVALID_SOCKET:
if (errno == EWOULDBLOCK)
return FALSE;
close(sdp->com_data);
sdp->com_data = INVALID_SOCKET;
return FALSE;
}
for (i = 0; i < n; i++)
sdIncomingDataI(sdp, data[i]);
return TRUE;
}
return FALSE;
}
static bool_t outint(SerialDriver *sdp) {
if (sdp->com_data != INVALID_SOCKET) {
int n;
uint8_t data[1];
/*
* Input.
*/
n = sdRequestDataI(sdp);
if (n < 0)
return FALSE;
data[0] = (uint8_t)n;
n = send(sdp->com_data, data, sizeof(data), 0);
switch (n) {
case 0:
close(sdp->com_data);
sdp->com_data = INVALID_SOCKET;
chIOAddFlagsI(sdp, IO_DISCONNECTED);
return FALSE;
case INVALID_SOCKET:
if (errno == EWOULDBLOCK)
return FALSE;
close(sdp->com_data);
sdp->com_data = INVALID_SOCKET;
return FALSE;
}
return TRUE;
}
return FALSE;
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level serial driver initialization.
*/
void sd_lld_init(void) {
#if USE_SIM_SERIAL1
sdObjectInit(&SD1, NULL, NULL);
SD1.com_listen = INVALID_SOCKET;
SD1.com_data = INVALID_SOCKET;
SD1.com_name = "SD1";
#endif
#if USE_SIM_SERIAL2
sdObjectInit(&SD2, NULL, NULL);
SD2.com_listen = INVALID_SOCKET;
SD2.com_data = INVALID_SOCKET;
SD2.com_name = "SD2";
#endif
}
/**
* @brief Low level serial driver configuration and (re)start.
*
* @param[in] sdp pointer to a @p SerialDriver object
*/
void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
if (config == NULL)
config = &default_config;
#if USE_SIM_SERIAL1
if (sdp == &SD1)
init(&SD1, SIM_SD1_PORT);
#endif
#if USE_SIM_SERIAL2
if (sdp == &SD2)
init(&SD2, SIM_SD2_PORT);
#endif
}
/**
* @brief Low level serial driver stop.
* @details De-initializes the USART, stops the associated clock, resets the
* interrupt vector.
*
* @param[in] sdp pointer to a @p SerialDriver object
*/
void sd_lld_stop(SerialDriver *sdp) {
(void)sdp;
}
bool_t sd_lld_interrupt_pending(void) {
return connint(&SD1) || connint(&SD2) ||
inint(&SD1) || inint(&SD2) ||
outint(&SD1) || outint(&SD2);
}
#endif /* HAL_USE_SERIAL */
/** @} */
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