Add a simple touchscreen test

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3995 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 199 insertions, 0 deletions

diff --git a/apps/examples/touchscreen/tc_main.c b/apps/examples/touchscreen/tc_main.c
new file mode 100644
index 000000000..7547ee489
--- /dev/null
+++ b/apps/examples/touchscreen/tc_main.c
@@ -0,0 +1,199 @@
+/****************************************************************************
+ * examples/touchscreen/tc_main.c
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/input/touchscreen.h>
+
+#include "tc.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: user_start/nxhello_main
+ ****************************************************************************/
+
+#ifdef CONFIG_EXAMPLES_TOUCHSCREEN_BUILTIN
+#  define MAIN_NAME   tc_main
+#  define MAIN_STRING "tc_main: "
+#else
+#  define MAIN_NAME   user_start
+#  define MAIN_STRING "user_start: "
+#endif
+
+int MAIN_NAME(int argc, char *argv[])
+{
+  struct touch_sample_s sample;
+  ssize_t nbytes;
+#ifdef CONFIG_EXAMPLES_TOUCHSCREEN_BUILTIN
+  long nsamples;
+#endif
+  int fd;
+  int errval = 0;
+  int ret;
+
+  /* If this example is configured as an NX add-on, then limit the number of
+   * samples that we collect before returning.  Otherwise, we never return
+   */
+
+#ifdef CONFIG_EXAMPLES_TOUCHSCREEN_BUILTIN
+  nsamples = 1;
+  if (argc > 1)
+    {
+      nsamples = strtol(argv[1]);
+    }
+#endif
+
+  /* Initialization of the touchscreen hardware is performed by logic
+   * external to this test.
+   */
+
+  message(MAIN_STRING "Initializing external touschscreen device\n");
+  ret = arch_tcinitialize(CONFIG_EXAMPLES_TOUCHSCREEN_MINOR);
+  if (ret != OK)
+    {
+      message(MAIN_STRING "arch_tcinitialize failed: %d\n", ret);
+      errval = 1;
+      goto errout;
+    }
+
+  /* Open the framebuffer device for reading */
+
+  fd = open(CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH, O_RDONLY);
+  if (fd < 0)
+    {
+      message(MAIN_STRING "open %s failed: %d\n",
+              CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH, errno);
+      errval = 2;
+      goto errout_with_tc;
+    }
+
+  /* Now loop the appropriate number of times, displaying the collected
+   * touchscreen samples.
+   */
+
+#ifdef CONFIG_EXAMPLES_TOUCHSCREEN_BUILTIN
+  for (; namples > 0; nsamples--)
+#else
+  for (;;)
+#endif
+  {
+    /* Read one sample */
+
+    nbytes = read(fd, &sample, sizeof(struct touch_sample_s));
+
+    /* Handle unexpected return values */
+
+    if (nbytes < 0)
+      {
+        errval = errno;
+        if (errval != EINTR)
+          {
+            message(MAIN_STRING "read %s failed: %d\n",
+                    CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH, errval);
+            errval = 3;
+            goto errout_with_dev;
+          }
+
+        message(MAIN_STRING "Interrupted read...\n");
+      }
+    else if (nbytes != sizeof(struct touch_sample_s))
+      {
+        message(MAIN_STRING "Unexpected read size=%d, expected=%d, Ignoring\n",
+                nbytes, sizeof(struct touch_sample_s));        
+      }
+
+    /* Print the sample data on successful return */
+
+    else
+      {
+        message("Sample     :\n");
+        message("   npoints : %d\n",   sample.npoints);
+        message("Point 1    :\n");
+        message("        id : %d\n",   sample.point[1].id);
+        message("     flags : %02x\n", sample.point[1].flags);
+        message("         x : %d\n",   sample.point[1].x);
+        message("         y : %d\n",   sample.point[1].y);
+        message("         h : %d\n",   sample.point[1].h);
+        message("         w : %d\n",   sample.point[1].w);
+        message("  pressure : %d\n",   sample.point[1].pressure);
+      }
+  }
+
+errout_with_dev:
+  close(fd);
+errout_with_tc:
+  arch_tcuninitialize();
+errout:
+  return errval;
+}