Add a test for PWM drivers

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4202 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 126 insertions, 0 deletions

diff --git a/apps/examples/pwm/pwm.h b/apps/examples/pwm/pwm.h
new file mode 100755
index 000000000..83d87517c
--- /dev/null
+++ b/apps/examples/pwm/pwm.h
@@ -0,0 +1,126 @@
+/****************************************************************************
+ * examples/examples/pwm.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_PWM_PWM_H
+#define __APPS_EXAMPLES_PWM_PWM_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+/* CONFIG_NSH_BUILTIN_APPS - Build the PWM test as an NSH built-in function.
+ *   Default: Not built!  The example can only be used as an NSH built-in
+ *   application
+ * CONFIG_EXAMPLES_PWM_DEVPATH - The path to the PWM device. Default: /dev/pwm0
+ * CONFIG_EXAMPLES_PWM_FREQUENCY - The initial PWM frequency.  Default: 100 Hz
+ * CONFIG_EXAMPLES_PWM_DUTYPCT - The initial PWM duty as a percentage.  Default: 50%
+ * CONFIG_EXAMPLES_PWM_DURATION - The initial PWM pulse train duration in sectonds.
+ *   as a percentage.  Default: 5 seconds
+ */
+
+#ifndef CONFIG_PWM
+#  error "PWM device support is not enabled (CONFIG_PWM)"
+#endif
+
+#ifndef CONFIG_NSH_BUILTIN_APPS
+#  warning "The PWM example only works as an NSH built-in application (CONFIG_NSH_BUILTIN_APPS)"
+#endif
+
+#ifndef CONFIG_EXAMPLES_PWM_DEVPATH
+#  define CONFIG_EXAMPLES_PWM_DEVPATH "/dev/pwm0"
+#endif
+
+#ifndef CONFIG_EXAMPLES_PWM_FREQUENCY
+#  define CONFIG_EXAMPLES_PWM_FREQUENCY 100
+#endif
+
+#ifndef CONFIG_EXAMPLES_PWM_DUTYPCT
+#  define CONFIG_EXAMPLES_PWM_DUTYPCT 50
+#endif
+
+#ifndef CONFIG_EXAMPLES_PWM_DURATION
+#  define CONFIG_EXAMPLES_PWM_DURATION 5
+#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
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: pwm_devinit()
+ *
+ * Description:
+ *   Perform architecuture-specific initialization of the PWM hardware.  This
+ *   interface must be provided by all configurations using apps/examples/pwm
+ *
+ ****************************************************************************/
+
+int pwm_devinit(void);
+
+#endif /* __APPS_EXAMPLES_PWM_PWM_H */