Add a mouse interface that is similar to the touchscreen interface except that it can handle multple buttons and continuously reports positional data so that it can control a cursor

ChangeLog.txt

@@ -818,4 +818,5 @@
 	  an option and can be replaces with the EMACX-like CLE (about 2KB)
 	  (2014-02-02).
 	* Several changes to restore Windows native build (2014-2-7)
-
+	* apps/examples/touchscreen:  Can not be configured to work with a mouse
+	  interface as well (2014-2-10).

examples/README.txt

@@ -1621,13 +1621,15 @@ examples/touchscreen
       corresponds to touchscreen device /dev/inputN.  Note this value must
       with CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH.  Default 0.
     CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH - The path to the touchscreen
-     device.  This must be consistent with CONFIG_EXAMPLES_TOUCHSCREEN_MINOR.
+      device.  This must be consistent with CONFIG_EXAMPLES_TOUCHSCREEN_MINOR.
-     Default: "/dev/input0"
+      Default: "/dev/input0"
     CONFIG_EXAMPLES_TOUCHSCREEN_NSAMPLES - If CONFIG_NSH_BUILTIN_APPS
-     is defined, then the number of samples is provided on the command line
+      is defined, then the number of samples is provided on the command line
-     and this value is ignored.  Otherwise, this number of samples is
+      and this value is ignored.  Otherwise, this number of samples is
-     collected and the program terminates.  Default:  Samples are collected
+      collected and the program terminates.  Default:  Samples are collected
-     indefinitely.
+      indefinitely.
+    CONFIG_EXAMPLES_TOUCHSCREEN_MOUSE - The touchscreen test can also be
+      configured to work with a mouse driver by setting this option.
 
   The following additional configurations must be set in the NuttX
   configuration file:

examples/touchscreen/Kconfig

@@ -36,4 +36,11 @@ config EXAMPLES_TOUCHSCREEN_NSAMPLES
 		Otherwise, this number of samples is collected and the program
 		terminates.  Default:  Zero (Samples are collected indefinitely).
 
+config EXAMPLES_TOUCHSCREEN_MOUSE
+	bool "Mouse interface"
+	default n
+	---help---
+		The touchscreen test can also be configured to work with a mouse
+		driver by setting this option.
+
 endif

examples/touchscreen/tc.h

@@ -59,6 +59,8 @@
  *   and this value is ignored.  Otherwise, this number of samples is
  *   collected and the program terminates.  Default:  Zero (Samples are collected
  *   indefinitely).
+ * CONFIG_EXAMPLES_TOUCHSCREEN_MOUSE - The touchscreen test can also be
+ *   configured to work with a mouse driver by setting this option.
  */
 
 #ifndef CONFIG_INPUT
@@ -68,13 +70,21 @@
 #ifndef CONFIG_EXAMPLES_TOUCHSCREEN_MINOR
 #  undef  CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH
 #  define CONFIG_EXAMPLES_TOUCHSCREEN_MINOR 0
-#  define CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH "/dev/input0"
+#  ifdef CONFIG_EXAMPLES_TOUCHSCREEN_MOUSE
+#    define CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH "/dev/mouse0"
+#  else
+#    define CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH "/dev/input0"
+#  endif
 #endif
 
 #ifndef CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH
 #  undef  CONFIG_EXAMPLES_TOUCHSCREEN_MINOR
 #  define CONFIG_EXAMPLES_TOUCHSCREEN_MINOR 0
-#  define CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH "/dev/input0"
+#  ifdef CONFIG_EXAMPLES_TOUCHSCREEN_MOUSE
+#    define CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH "/dev/mouse0"
+#  else
+#    define CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH "/dev/input0"
+#  endif
 #endif
 
 #ifndef CONFIG_EXAMPLES_TOUCHSCREEN_NSAMPLES

examples/touchscreen/tc_main.c

@@ -1,7 +1,7 @@
 /****************************************************************************
  * examples/touchscreen/tc_main.c
  *
- *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2011, 2014 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -48,6 +48,10 @@
 #include <errno.h>
 #include <debug.h>
 
+#ifdef CONFIG_EXAMPLES_TOUCHSCREEN_MOUSE
+#  include <nuttx/input/mouse.h>
+#endif
+
 #include <nuttx/input/touchscreen.h>
 
 #include "tc.h"
@@ -86,7 +90,11 @@
 
 int tc_main(int argc, char *argv[])
 {
+#ifdef CONFIG_EXAMPLES_TOUCHSCREEN_MOUSE
+  struct mouse_report_s sample;
+#else
   struct touch_sample_s sample;
+#endif
   ssize_t nbytes;
 #if defined(CONFIG_NSH_BUILTIN_APPS) || CONFIG_EXAMPLES_TOUCHSCREEN_NSAMPLES > 0
   long nsamples;
@@ -153,6 +161,44 @@ int tc_main(int argc, char *argv[])
 
     msgflush();
 
+#ifdef CONFIG_EXAMPLES_TOUCHSCREEN_MOUSE
+    /* Read one sample */
+
+    ivdbg("Reading...\n");
+    nbytes = read(fd, &sample, sizeof(struct mouse_report_s));
+    ivdbg("Bytes read: %d\n", nbytes);
+
+    /* Handle unexpected return values */
+
+    if (nbytes < 0)
+      {
+        errval = errno;
+        if (errval != EINTR)
+          {
+            message("tc_main: read %s failed: %d\n",
+                    CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH, errval);
+            errval = 3;
+            goto errout_with_dev;
+          }
+
+        message("tc_main: Interrupted read...\n");
+      }
+    else if (nbytes != sizeof(struct mouse_report_s))
+      {
+        message("tc_main: Unexpected read size=%d, expected=%d, Ignoring\n",
+                nbytes, sizeof(struct mouse_report_s));
+      }
+
+    /* Print the sample data on successful return */
+
+    else
+      {
+        message("Sample     :\n");
+        message("   buttons : %02x\n", sample.buttons);
+        message("         x : %d\n",   sample.x);
+        message("         y : %d\n",   sample.y);
+      }
+#else
     /* Read one sample */
 
     ivdbg("Reading...\n");
@@ -177,7 +223,7 @@ int tc_main(int argc, char *argv[])
     else if (nbytes != sizeof(struct touch_sample_s))
       {
         message("tc_main: Unexpected read size=%d, expected=%d, Ignoring\n",
-                nbytes, sizeof(struct touch_sample_s));        
+                nbytes, sizeof(struct touch_sample_s));
       }
 
     /* Print the sample data on successful return */
@@ -195,6 +241,7 @@ int tc_main(int argc, char *argv[])
         message("         w : %d\n",   sample.point[0].w);
         message("  pressure : %d\n",   sample.point[0].pressure);
       }
+#endif
   }
 
 errout_with_dev: