Add option to used keyboard CODEC in apps/examples/keypadtest

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5554 42af7a65-404d-4744-a932-0658087f49c3

examples/keypadtest/Kconfig

@@ -18,4 +18,12 @@ if EXAMPLES_KEYPADTEST
 		The name of the keypad device that will be opened in order to perform
 		the keypad test.  Default: "/dev/keypad"
 
+config EXAMPLES_KEYPADTEST_ENCODED
+	bool "Use Keyboard CODEC"
+	default n
+	---help---
+		Use the keyboard encoded/decoder to pass control information from
+		the keypad driver to the keypad test.  This is the keyboard CODEC
+		defined in nuttx/input/kbd_codec.h.
+
 endif

examples/keypadtest/keypadtest_main.c

@@ -50,6 +50,11 @@
 
 #include <nuttx/input/keypad.h>
 
+#ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
+#  include <nuttx/streams.h>
+#  include <nuttx/input/kbd_codec.h>
+#endif
+
 /****************************************************************************
  * Definitions
  ****************************************************************************/
@@ -67,6 +72,15 @@
  * Private Types
  ****************************************************************************/
 
+#ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
+struct keypad_instream_s
+{
+  struct lib_instream_s stream;
+  FAR char *buffer;
+  ssize_t nbytes;
+};
+#endif
+
 /****************************************************************************
  * Private Data
  ****************************************************************************/
@@ -75,6 +89,102 @@
  * Private Functions
  ****************************************************************************/
 
+/****************************************************************************
+ * Name: keypad_getstream
+ *
+ * Description:
+ *   Get one character from the keyboard.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
+static int keypad_getstream(FAR struct lib_instream_s *this)
+{
+  FAR struct keypad_instream_s *kbdstream = (FAR struct keypad_instream_s *)this;
+
+  DEBUGASSERT(kbdstream && kbdstream->buffer);
+  if (kbdstream->nbytes > 0)
+    {
+      kbdstream->nbytes--;
+      kbdstream->stream.nget++;
+      return (int)*kbdstream->buffer++;
+    }
+
+  return EOF;
+}
+#endif
+
+/****************************************************************************
+ * Name: keypad_decode
+ *
+ * Description:
+ *   Decode encoded keyboard input
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
+static void keypad_decode(FAR char *buffer, ssize_t nbytes)
+{
+  struct keypad_instream_s kbdstream;
+  struct kbd_getstate_s state;
+  uint8_t ch;
+  int ret;
+
+  /* Initialize */
+
+  memset(&state, 0, sizeof(struct kbd_getstate_s));
+  kbdstream.stream.get  = keypad_getstream;
+  kbdstream.stream.nget = 0;
+  kbdstream.buffer      = buffer;
+  kbdstream.nbytes      = nbytes;
+
+  /* Loop until all of the bytes have been consumed.  We implicitly assume
+   * that the the escaped sequences do not cross buffer boundaries.  That
+   * might be true if the read buffer were small or the data rates high.
+   */
+
+  for (;;)
+    {
+      /* Decode the next thing from the buffer */
+
+      ret = kbd_decode((FAR struct lib_instream_s *)&kbdstream, &state, &ch);
+      if (ret == KBD_ERROR)
+        {
+          break;
+        }
+
+      /* Normal data?  Or special key? */
+
+      switch (ret)
+        {
+        case KBD_PRESS: /* Key press event */
+          printf("Normal Press:    %c [%02x]\n", isprint(ch) ? ch : '.', ch);
+          break;
+
+        case KBD_RELEASE: /* Key release event */
+          printf("Normal Release:  %c [%02x]\n", isprint(ch) ? ch : '.', ch);
+          break;
+
+        case KBD_SPECPRESS: /* Special key press event */
+          printf("Special Press:   %d\n", ch);
+          break;
+
+        case KBD_SPECREL: /* Special key release event */
+          printf("Special Release: %d\n", ch);
+          break;
+
+        case KBD_ERROR: /* Error or end-of-file */
+          printf("EOF:             %d\n", ret);
+          break;
+
+        default:
+          printf("Unexpected:      %d\n", ret);
+          break;
+        }
+    }
+}
+#endif
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -125,8 +235,11 @@ int keypadtest_main(int argc, char *argv[])
       if (nbytes > 0)
         {
           /* On success, echo the buffer to stdout */
-
+#ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
+          keypad_decode(buffer, nbytes);
+#else
           (void)write(1, buffer, nbytes);
+#endif
         }
     }
   while (nbytes >= 0);