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Diffstat (limited to 'apps/examples/i2schar/i2schar_main.c')
| -rw-r--r-- | apps/examples/i2schar/i2schar_main.c | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/apps/examples/i2schar/i2schar_main.c b/apps/examples/i2schar/i2schar_main.c new file mode 100644 index 000000000..2d5df3ce9 --- /dev/null +++ b/apps/examples/i2schar/i2schar_main.c @@ -0,0 +1,344 @@ +/**************************************************************************** + * examples/i2schar/i2schar_main.c + * + * Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * 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 "i2schar.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +struct i2schar_state_s g_i2schar; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: i2schar_devpath + ****************************************************************************/ + +static void i2schar_devpath(FAR struct i2schar_state_s *i2schar, + FAR const char *devpath) +{ + /* Get rid of any old device path */ + + if (i2schar->devpath) + { + free(i2schar->devpath); + } + + /* Then set-up the new device path by copying the string */ + + i2schar->devpath = strdup(devpath); +} + +/**************************************************************************** + * Name: i2schar_help + ****************************************************************************/ + +#ifdef CONFIG_NSH_BUILTIN_APPS +static void i2schar_help(FAR struct i2schar_state_s *i2schar) +{ + message("Usage: i2schar [OPTIONS]\n"); + message("\nArguments are \"sticky\". For example, once the I2C character device is\n"); + message("specified, that device will be re-used until it is changed.\n"); + message("\n\"sticky\" OPTIONS include:\n"); + message(" [-p devpath] selects the I2C character device path. " + "Default: %s Current: %s\n", + CONFIG_EXAMPLES_I2SCHAR_DEVPATH, g_i2schar.devpath ? g_i2schar.devpath : "NONE"); +#ifdef CONFIG_EXAMPLES_I2SCHAR_TX + message(" [-t count] selects the number of audio buffers to send. " + "Default: %d Current: %d\n", + CONFIG_EXAMPLES_I2SCHAR_TXBUFFERS, i2schar->txcount); +#endif +#ifdef CONFIG_EXAMPLES_I2SCHAR_TX + message(" [-r count] selects the number of audio buffers to receive. " + "Default: %d Current: %d\n", + CONFIG_EXAMPLES_I2SCHAR_RXBUFFERS, i2schar->txcount); +#endif + message(" [-h] shows this message and exits\n"); +} +#endif + +/**************************************************************************** + * Name: arg_string + ****************************************************************************/ + +#ifdef CONFIG_NSH_BUILTIN_APPS +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; + } +} +#endif + +/**************************************************************************** + * Name: arg_decimal + ****************************************************************************/ + +#ifdef CONFIG_NSH_BUILTIN_APPS +static int arg_decimal(FAR char **arg, FAR long *value) +{ + FAR char *string; + int ret; + + ret = arg_string(arg, &string); + *value = strtol(string, NULL, 10); + return ret; +} +#endif + +/**************************************************************************** + * Name: parse_args + ****************************************************************************/ + +#ifdef CONFIG_NSH_BUILTIN_APPS +static void parse_args(FAR struct i2schar_state_s *i2schar, int argc, FAR char **argv) +{ + FAR char *ptr; + FAR char *str; + long value; + int index; + int nargs; + + for (index = 1; index < argc; ) + { + ptr = argv[index]; + if (ptr[0] != '-') + { + message("Invalid options format: %s\n", ptr); + exit(0); + } + + switch (ptr[1]) + { + case 'p': + nargs = arg_string(&argv[index], &str); + i2schar_devpath(i2schar, str); + index += nargs; + break; + + case 'r': + nargs = arg_decimal(&argv[index], &value); + if (value < 0) + { + message("Count must be non-negative: %ld\n", value); + exit(1); + } + + i2schar->rxcount = (uint32_t)value; + index += nargs; + break; + + case 't': + nargs = arg_decimal(&argv[index], &value); + if (value < 0) + { + message("Count must be non-negative: %ld\n", value); + exit(1); + } + + i2schar->txcount = (uint32_t)value; + index += nargs; + break; + + case 'h': + i2schar_help(i2schar); + exit(0); + + default: + message("Unsupported option: %s\n", ptr); + i2schar_help(i2schar); + exit(1); + } + } +} +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: i2schar_main + ****************************************************************************/ + +int i2schar_main(int argc, char *argv[]) +{ + pthread_attr_t attr; + pthread_addr_t result; +#ifdef CONFIG_EXAMPLES_I2SCHAR_TX + pthread_t transmitter; +#endif +#ifdef CONFIG_EXAMPLES_I2SCHAR_RX + pthread_t receiver; +#endif + int ret; + + /* Check if we have initialized */ + + if (!g_i2schar.initialized) + { +#ifdef CONFIG_EXAMPLES_I2SCHAR_DEVINIT + /* Initialization of the I2C character device is performed by logic + * external to this test. + */ + + message("i2schar_main: Initializing external I2C character device\n"); + ret = i2schar_devinit(); + if (ret != OK) + { + message("i2schar_main: i2schar_devinit failed: %d\n", ret); + return EXIT_FAILURE; + } +#endif + + /* Set the default values */ + + i2schar_devpath(&g_i2schar, CONFIG_EXAMPLES_I2SCHAR_DEVPATH); + +#ifdef CONFIG_EXAMPLES_I2SCHAR_TX + g_i2schar.txcount = CONFIG_EXAMPLES_I2SCHAR_TXBUFFERS; +#else + g_i2schar.rxcount = CONFIG_EXAMPLES_I2SCHAR_RXBUFFERS; +#endif + + g_i2schar.initialized = true; + } + + /* Parse the command line */ + +#ifdef CONFIG_NSH_BUILTIN_APPS + parse_args(&g_i2schar, argc, argv); +#endif + + sched_lock(); +#ifdef CONFIG_EXAMPLES_I2SCHAR_TX + /* Start the transmitter thread */ + + message("i2schar_main: Start transmitter thread\n"); + + pthread_attr_init(&attr); + (void)pthread_attr_setstacksize(&attr, CONFIG_EXAMPLES_I2SCHAR_TXSTACKSIZE); + + ret = pthread_create(&transmitter, &attr, i2schar_transmitter, NULL); + if (ret != OK) + { + message("i2schar_main: ERROR: failed to Start transmitter thread: %d\n", ret); + return EXIT_FAILURE; + } +#endif + +#ifdef CONFIG_EXAMPLES_I2SCHAR_RX + /* Start the receiver thread */ + + message("i2schar_main: Start receiver thread\n"); + + pthread_attr_init(&attr); + (void)pthread_attr_setstacksize(&attr, CONFIG_EXAMPLES_I2SCHAR_RXSTACKSIZE); + + ret = pthread_create(&receiver, &attr, i2schar_receiver, NULL); + if (ret != OK) + { + message("i2schar_main: ERROR: failed to Start receiver thread: %d\n", ret); +#ifdef CONFIG_EXAMPLES_I2SCHAR_TX + message("i2schar_main: Waiting for the transmitter thread\n"); + (void)pthread_join(transmitter, &result); +#endif + return EXIT_FAILURE; + } +#endif + +#ifdef CONFIG_EXAMPLES_I2SCHAR_TX + message("i2schar_main: Waiting for the transmitter thread\n"); + ret = pthread_join(transmitter, &result); + if (ret != OK) + { + message("i2schar_main: ERROR: pthread_join failed: %d\n", ret); + } +#endif + +#ifdef CONFIG_EXAMPLES_I2SCHAR_RX + message("i2schar_main: Waiting for the receiver thread\n"); + ret = pthread_join(receiver, &result); + if (ret != OK) + { + message("i2schar_main: ERROR: pthread_join failed: %d\n", ret); + } +#endif + + return EXIT_SUCCESS; +} |