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Diffstat (limited to 'apps/examples/qencoder/qe.h')
-rw-r--r-- | apps/examples/qencoder/qe.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/apps/examples/qencoder/qe.h b/apps/examples/qencoder/qe.h new file mode 100644 index 000000000..4c03689ab --- /dev/null +++ b/apps/examples/qencoder/qe.h @@ -0,0 +1,134 @@ +/**************************************************************************** + * examples/examples/qe/qe.h + * + * Copyright (C) 2011 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. + * + ****************************************************************************/ + +#ifndef __APPS_EXAMPLES_QENCODER_QE_H +#define __APPS_EXAMPLES_QENCODER_QE_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ +/* Configuration ************************************************************/ +/* CONFIG_NSH_BUILTIN_APPS - Build the QE test as an NSH built-in function. + * Default: Built as a standalone problem + * CONFIG_EXAMPLES_QENCODER_DEVPATH - The path to the QE device. Default: + * /dev/qe0 + * CONFIG_EXAMPLES_QENCODER_NSAMPLES - If CONFIG_NSH_BUILTIN_APPS + * is defined, then the number of samples is provided on the command line + * and this value is ignored. Otherwise, this number of samples is + * collected and the program terminates. Default: Samples are collected + * indefinitely. + * CONFIG_EXAMPLES_QENCODER_DELAY - This value provides the delay (in + * milliseonds) between each sample. If CONFIG_NSH_BUILTIN_APPS + * is defined, then this value is the default delay if no other delay is + * provided on the command line. Default: 100 milliseconds + */ + +#ifndef CONFIG_QENCODER +# error "QE device support is not enabled (CONFIG_QENCODER)" +#endif + +#ifndef CONFIG_EXAMPLES_QENCODER_DEVPATH +# define CONFIG_EXAMPLES_QENCODER_DEVPATH "/dev/qe0" +#endif + +#ifndef CONFIG_EXAMPLES_QENCODER_DELAY +# define CONFIG_EXAMPLES_QENCODER_DELAY 100 +#endif + +/* Debug ********************************************************************/ + +#ifdef CONFIG_CPP_HAVE_VARARGS +# ifdef CONFIG_DEBUG +# define message(...) lib_rawprintf(__VA_ARGS__) +# define msgflush() +# else +# define message(...) printf(__VA_ARGS__) +# define msgflush() fflush(stdout) +# endif +#else +# ifdef CONFIG_DEBUG +# define message lib_rawprintf +# define msgflush() +# else +# define message printf +# define msgflush() fflush(stdout) +# endif +#endif + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +#ifdef CONFIG_NSH_BUILTIN_APPS +struct qe_example_s +{ + bool initialized; /* True: QE devices have been initialized */ + bool reset; /* True: set the count back to zero */ + FAR char *devpath; /* Path to the QE device */ + unsigned int nloops; /* Collect this number of samples */ + unsigned int delay; /* Delay this number of seconds between samples */ +}; +#endif + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +#ifdef CONFIG_NSH_BUILTIN_APPS +extern struct qe_example_s g_qeexample; +#endif + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Name: qe_devinit() + * + * Description: + * Perform architecuture-specific initialization of the QE hardware. This + * interface must be provided by all configurations using apps/examples/qe + * + ****************************************************************************/ + +int qe_devinit(void); + +#endif /* __APPS_EXAMPLES_QENCODER_QE_H */ |