games/brickmatch: Add touchscreen input and module support.

games/brickmatch/Kconfig

@@ -4,7 +4,7 @@
 #
 
 config GAMES_BRICKMATCH
-	bool "Brickmatch Game"
+	tristate "Brickmatch Game"
 	default n
 	---help---
 		Enable Brickmatch games. Brickmatch is like a mix
@@ -88,6 +88,10 @@ config GAMES_BRICKMATCH_USE_GESTURE
 
 config GAMES_BRICKMATCH_USE_GPIO
 	bool "GPIO pins as Input"
+
+config GAMES_BRICKMATCH_USE_TOUCHSCREEN
+	bool "Touchscreen swipe as input"
+	depends on INPUT_TOUCHSCREEN
 endchoice
 
 if GAMES_BRICKMATCH_USE_GPIO
@@ -118,4 +122,34 @@ config GAMES_BRICKMATCH_RIGHT_KEY_PATH
 
 endif #GAMES_BRICKMATCH_USE_GPIO
 
+if GAMES_BRICKMATCH_USE_TOUCHSCREEN
+
+config GAMES_BRICKMATCH_TOUCH_DEVPATH
+	string "Touchscreen device path"
+	default "/dev/input0"
+	---help---
+		Path of the touchscreen device to read swipe gestures from.
+
+config GAMES_BRICKMATCH_TOUCH_THRESHOLD
+	int "Minimum swipe distance"
+	range 1 32767
+	default 24
+	---help---
+		Minimum movement in calibrated touchscreen coordinate units before
+		a drag is reported as a direction.
+
+endif #GAMES_BRICKMATCH_USE_TOUCHSCREEN
+
+if !GAMES_BRICKMATCH_USE_LED_MATRIX
+
+config GAMES_BRICKMATCH_YOFFSET
+	int "Top framebuffer rows to reserve"
+	range 0 500000
+	default 0
+	---help---
+		Leave this many rows at the top of the framebuffer unchanged. This
+		allows a launcher or supervisor to reserve a status or control bar.
+
+endif # !GAMES_BRICKMATCH_USE_LED_MATRIX
+
 endif

games/brickmatch/bm_input_touch.h

@@ -0,0 +1,173 @@
+/****************************************************************************
+ * apps/games/brickmatch/bm_input_touch.h
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_GAMES_BRICKMATCH_BM_INPUT_TOUCH_H
+#define __APPS_GAMES_BRICKMATCH_BM_INPUT_TOUCH_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <nuttx/input/touchscreen.h>
+
+#include "bm_inputs.h"
+
+/****************************************************************************
+ * Preprocessor Definitions
+ ****************************************************************************/
+
+/* Touch origin for the current swipe. */
+
+static bool g_bm_touch_active;
+static int32_t g_bm_touch_origin_x;
+static int32_t g_bm_touch_origin_y;
+
+/****************************************************************************
+ * Name: dev_input_init
+ *
+ * Description:
+ *   Initialize input method.
+ *
+ * Parameters:
+ *   dev - Input state data
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success. A negated errno value is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int dev_input_init(FAR struct input_state_s *dev)
+{
+  dev->fd_touch = open(CONFIG_GAMES_BRICKMATCH_TOUCH_DEVPATH,
+                       O_RDONLY | O_NONBLOCK);
+  if (dev->fd_touch < 0)
+    {
+      int errcode = errno;
+      fprintf(stderr, "ERROR: Failed to open %s: %d\n",
+              CONFIG_GAMES_BRICKMATCH_TOUCH_DEVPATH, errcode);
+      return -errcode;
+    }
+
+  g_bm_touch_active = false;
+
+  return OK;
+}
+
+/****************************************************************************
+ * Name: dev_read_input
+ *
+ * Description:
+ *   Convert a touchscreen swipe to a game direction.
+ *
+ * Parameters:
+ *   dev - Input state data
+ *
+ * Returned Value:
+ *   Zero (OK)
+ *
+ ****************************************************************************/
+
+int dev_read_input(FAR struct input_state_s *dev)
+{
+  struct touch_sample_s sample;
+  int32_t dx;
+  int32_t dy;
+  ssize_t nbytes;
+
+  dev->dir = DIR_NONE;
+
+  nbytes = read(dev->fd_touch, &sample, sizeof(sample));
+  if (nbytes < 0)
+    {
+      if (errno == EAGAIN || errno == EWOULDBLOCK)
+        {
+          usleep(10000);
+          return OK;
+        }
+
+      return -errno;
+    }
+
+  if (nbytes != sizeof(sample) || sample.npoints < 1)
+    {
+      return OK;
+    }
+
+  if (sample.point[0].flags & TOUCH_UP)
+    {
+      g_bm_touch_active = false;
+      return OK;
+    }
+
+  if ((sample.point[0].flags & TOUCH_POS_VALID) == 0)
+    {
+      return OK;
+    }
+
+  if (sample.point[0].flags & TOUCH_DOWN)
+    {
+      g_bm_touch_active = true;
+      g_bm_touch_origin_x = sample.point[0].x;
+      g_bm_touch_origin_y = sample.point[0].y;
+      return OK;
+    }
+
+  if (!g_bm_touch_active)
+    {
+      return OK;
+    }
+
+  dx = sample.point[0].x - g_bm_touch_origin_x;
+  dy = sample.point[0].y - g_bm_touch_origin_y;
+
+  if (abs(dx) < CONFIG_GAMES_BRICKMATCH_TOUCH_THRESHOLD &&
+      abs(dy) < CONFIG_GAMES_BRICKMATCH_TOUCH_THRESHOLD)
+    {
+      return OK;
+    }
+
+  if (abs(dx) > abs(dy))
+    {
+      dev->dir = dx > 0 ? DIR_RIGHT : DIR_LEFT;
+    }
+  else
+    {
+      dev->dir = dy > 0 ? DIR_DOWN : DIR_UP;
+    }
+
+  g_bm_touch_origin_x = sample.point[0].x;
+  g_bm_touch_origin_y = sample.point[0].y;
+
+  return OK;
+}
+
+#endif /* __APPS_GAMES_BRICKMATCH_BM_INPUT_TOUCH_H */

games/brickmatch/bm_inputs.h

@@ -64,6 +64,9 @@ struct input_state_s
 #ifdef CONFIG_GAMES_BRICKMATCH_USE_GPIO
   int fd_gpio;
 #endif
+#ifdef CONFIG_GAMES_BRICKMATCH_USE_TOUCHSCREEN
+  int fd_touch;
+#endif
 
   int dir;      /* Direction to move the blocks */
 };