standard keypad inteface and apps/examples/keypadtest from Denis Carikli

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5403 42af7a65-404d-4744-a932-0658087f49c3
2026-10-26 02:53:34 +08:00 · 2012-12-01 15:43:51 +00:00
parent f63b1d9296
commit 7f7356cdc9
14 changed files with 358 additions and 5 deletions
@@ -0,0 +1,138 @@
+/****************************************************************************
+ * examples/keypadtest/keypadtest_main.c
+ *
+ *   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 Gregory Nutt 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 <sys/stat.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sched.h>
+#include <errno.h>
+
+#include <nuttx/input/keypad.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+
+/* Sanity checking */
+
+/* Provide some default values for other configuration settings */
+
+#ifndef CONFIG_EXAMPLES_KEYPAD_DEVNAME
+#  define CONFIG_EXAMPLES_KEYPAD_DEVNAME "/dev/keypad"
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: keypadtest_main
+ ****************************************************************************/
+
+int keypadtest_main(int argc, char *argv[])
+{
+  char buffer[256];
+  ssize_t nbytes;
+  int fd;
+  int ret;
+
+  /* First, register the keyboard device(s) */
+
+  printf("keypadtest_main: Register keyboard device\n");
+  ret = keypad_kbdinit();
+  if (ret != OK)
+    {
+      printf("keypadtest_main: Failed to register the KBD class\n");
+      fflush(stdout);
+      return 1;
+    }
+
+  /* Open the configured keyboard device. */
+
+  printf("keypadtest_main: Opening device %s\n", CONFIG_EXAMPLES_KEYPAD_DEVNAME);
+  fd = open(CONFIG_EXAMPLES_KEYPAD_DEVNAME, O_RDONLY);
+  if (fd < 0)
+    {
+      printf("keypadtest_main: open() failed: %d\n", errno);
+      fflush(stdout);
+      return 1;
+    }
+
+  printf("keypadtest_main: Device %s opened\n", CONFIG_EXAMPLES_KEYPAD_DEVNAME);
+  fflush(stdout);
+
+  /* Loop until there is a read failure */
+
+  do
+    {
+      /* Read a buffer of data */
+
+      nbytes = read(fd, buffer, 256);
+      if (nbytes > 0)
+        {
+          /* On success, echo the buffer to stdout */
+
+          (void)write(1, buffer, nbytes);
+        }
+    }
+  while (nbytes >= 0);
+
+  printf("keypadtest_main: Closing device %s: %d\n", CONFIG_EXAMPLES_KEYPAD_DEVNAME, (int)nbytes);
+  fflush(stdout);
+  close(fd);
+  return 0;
+}