/****************************************************************************
* apps/examples/rmtchar/rmtchar_main.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <errno.h>
#include <debug.h>
#include "rmtchar.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#if !defined(CONFIG_EXAMPLES_RMTCHAR_RX) && \
!defined(CONFIG_EXAMPLES_RMTCHAR_TX)
# error "At least one of CONFIG_EXAMPLES_RMTCHAR_RX or \
CONFIG_EXAMPLES_RMTCHAR_TX must be defined"
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static struct rmtchar_state_s g_rmtchar;
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: rmtchar_devpath
****************************************************************************/
static void rmtchar_devpath(FAR struct rmtchar_state_s *rmtchar,
FAR const char *devpath,
bool is_tx)
{
/* Get rid of any old device path */
if (is_tx)
{
if (rmtchar->txdevpath)
{
free(rmtchar->txdevpath);
}
/* Then set-up the new device path by copying the string */
rmtchar->txdevpath = strdup(devpath);
}
else
{
if (rmtchar->rxdevpath)
{
free(rmtchar->rxdevpath);
}
/* Then set-up the new device path by copying the string */
rmtchar->rxdevpath = strdup(devpath);
}
}
/****************************************************************************
* Name: rmtchar_help
****************************************************************************/
static void rmtchar_help(FAR struct rmtchar_state_s *rmtchar)
{
printf("Usage: rmtchar [OPTIONS]\n");
printf("\nArguments are \"sticky\".\n");
printf("For example, once the RMT character device is\n");
printf("specified, that device will be re-used until it is changed.\n");
printf("\n\"sticky\" OPTIONS include:\n");
printf(" [-i items] selects the number of words (items) to be transmitted"
" or received by the RMT character device. "
"Default: %d Current: %d\n",
CONFIG_EXAMPLES_RMTCHAR_ITEMS,
rmtchar->rmtchar_items ? rmtchar->rmtchar_items :
CONFIG_EXAMPLES_RMTCHAR_ITEMS);
#ifdef CONFIG_EXAMPLES_RMTCHAR_TX
printf(" [-t devpath] selects the RMT transmitter character device path. "
"Default: %s Current: %s\n",
CONFIG_EXAMPLES_RMTCHAR_TX_DEVPATH,
rmtchar->txdevpath ? rmtchar->txdevpath : "NONE");
#endif
#ifdef CONFIG_EXAMPLES_RMTCHAR_RX
printf(" [-r devpath] selects the RMT receiver character device path. "
"Default: %s Current: %s\n",
CONFIG_EXAMPLES_RMTCHAR_RX_DEVPATH,
rmtchar->rxdevpath ? rmtchar->rxdevpath : "NONE");
#endif
printf(" [-h] shows this message and exits\n");
}
/****************************************************************************
* Name: arg_string
****************************************************************************/
static int arg_string(FAR char **arg, FAR char **value)
{
FAR char *ptr = *arg;
if (ptr[2] == '\0')
{
*value = arg[1];
return 2;
}
else
{
*value = &ptr[2];
return 1;
}
}
/****************************************************************************
* Name: arg_decimal
****************************************************************************/
static int arg_decimal(FAR char **arg, FAR int *value)
{
FAR char *string;
int ret;
ret = arg_string(arg, &string);
*value = strtol(string, NULL, 10);
return ret;
}
/****************************************************************************
* Name: parse_args
****************************************************************************/
static void parse_args(FAR struct rmtchar_state_s *rmtchar,
int argc,
FAR char **argv)
{
FAR char *ptr;
FAR char *str;
int value;
int index;
int nargs;
for (index = 1; index < argc; )
{
ptr = argv[index];
if (ptr[0] != '-')
{
printf("Invalid options format: %s\n", ptr);
exit(0);
}
switch (ptr[1])
{
case 'i':
nargs = arg_decimal(&argv[index], &value);
if (value < 0)
{
printf("Count must be non-negative: %d\n", value);
exit(1);
}
rmtchar->rmtchar_items = value;
index += nargs;
break;
#ifdef CONFIG_EXAMPLES_RMTCHAR_TX
case 't':
nargs = arg_string(&argv[index], &str);
rmtchar_devpath(rmtchar, str, true);
index += nargs;
break;
#endif
#ifdef CONFIG_EXAMPLES_RMTCHAR_RX
case 'r':
nargs = arg_string(&argv[index], &str);
rmtchar_devpath(rmtchar, str, false);
index += nargs;
break;
#endif
case 'h':
rmtchar_help(rmtchar);
exit(0);
default:
printf("Unsupported option: %s\n", ptr);
rmtchar_help(rmtchar);
exit(1);
}
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: rmtchar_main
****************************************************************************/
int main(int argc, FAR char *argv[])
{
pthread_attr_t attr;
pthread_addr_t result;
#ifdef CONFIG_EXAMPLES_RMTCHAR_TX
pthread_t transmitter;
#endif
#ifdef CONFIG_EXAMPLES_RMTCHAR_RX
pthread_t receiver;
#endif
#if defined(CONFIG_EXAMPLES_RMTCHAR_RX) && defined(CONFIG_EXAMPLES_RMTCHAR_TX)
struct sched_param param;
#endif
int ret;
UNUSED(ret);
/* Check if we have initialized */
if (!g_rmtchar.initialized)
{
/* Set the default values */
g_rmtchar.rmtchar_items = CONFIG_EXAMPLES_RMTCHAR_ITEMS;
#ifdef CONFIG_EXAMPLES_RMTCHAR_TX
rmtchar_devpath(&g_rmtchar, CONFIG_EXAMPLES_RMTCHAR_TX_DEVPATH, true);
#endif
#ifdef CONFIG_EXAMPLES_RMTCHAR_RX
rmtchar_devpath(&g_rmtchar, CONFIG_EXAMPLES_RMTCHAR_RX_DEVPATH, false);
#endif
g_rmtchar.initialized = true;
}
/* Parse the command line */
parse_args(&g_rmtchar, argc, argv);
#ifdef CONFIG_EXAMPLES_RMTCHAR_RX
/* Start the receiver thread */
printf("rmtchar_main: Start receiver thread\n");
pthread_attr_init(&attr);
#ifdef CONFIG_EXAMPLES_RMTCHAR_TX
/* Bump the receiver priority from the default so that it will be above
* the priority of transmitter. This is important if a loopback test is
* being performed.
*/
pthread_attr_getschedparam(&attr, ¶m);
param.sched_priority++;
pthread_attr_setschedparam(&attr, ¶m);
#endif
/* Set the receiver stack size */
pthread_attr_setstacksize(&attr, CONFIG_EXAMPLES_RMTCHAR_RXSTACKSIZE);
/* Start the receiver */
ret = pthread_create(&receiver, &attr, rmtchar_receiver, &g_rmtchar);
if (ret != OK)
{
printf("rmtchar_main: ERROR: failed to Start receiver thread: %d\n",
ret);
return EXIT_FAILURE;
}
pthread_setname_np(receiver, "receiver");
#endif
#ifdef CONFIG_EXAMPLES_RMTCHAR_TX
/* Start the transmitter thread */
printf("rmtchar_main: Start transmitter thread\n");
pthread_attr_init(&attr);
/* Set the transmitter stack size */
pthread_attr_setstacksize(&attr, CONFIG_EXAMPLES_RMTCHAR_TXSTACKSIZE);
/* Start the transmitter */
ret = pthread_create(&transmitter, &attr, rmtchar_transmitter, &g_rmtchar);
if (ret != OK)
{
printf("rmtchar_main: ERROR: failed to Start transmitter thread: %d\n",
ret);
#ifdef CONFIG_EXAMPLES_RMTCHAR_RX
printf("rmtchar_main: Waiting for the receiver thread\n");
pthread_join(receiver, &result);
#endif
return EXIT_FAILURE;
}
pthread_setname_np(transmitter, "transmitter");
#endif
#ifdef CONFIG_EXAMPLES_RMTCHAR_TX
printf("rmtchar_main: Waiting for the transmitter thread\n");
ret = pthread_join(transmitter, &result);
if (ret != OK)
{
printf("rmtchar_main: ERROR: pthread_join failed: %d\n", ret);
}
#endif
#ifdef CONFIG_EXAMPLES_RMTCHAR_RX
printf("rmtchar_main: Waiting for the receiver thread\n");
ret = pthread_join(receiver, &result);
if (ret != OK)
{
printf("rmtchar_main: ERROR: pthread_join failed: %d\n", ret);
}
#endif
return EXIT_SUCCESS;
}