[WIP] examples/calculator: Add an LVGL touchscreen calculator.

examples/calculator/CMakeLists.txt

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+# ##############################################################################
+# apps/examples/calculator/CMakeLists.txt
+#
+# 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.
+#
+# ##############################################################################
+
+if(CONFIG_EXAMPLES_CALCULATOR)
+  nuttx_add_application(
+    NAME
+    calc
+    PRIORITY
+    ${CONFIG_EXAMPLES_CALCULATOR_PRIORITY}
+    STACKSIZE
+    ${CONFIG_EXAMPLES_CALCULATOR_STACKSIZE}
+    MODULE
+    ${CONFIG_EXAMPLES_CALCULATOR}
+    DEPENDS
+    lvgl
+    SRCS
+    calculator_main.c)
+endif()

examples/calculator/Kconfig

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+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+menuconfig EXAMPLES_CALCULATOR
+	tristate "Calculator"
+	default n
+	depends on GRAPHICS_LVGL && INPUT_TOUCHSCREEN
+	---help---
+		Enable the simple LVGL touchscreen calculator example.
+
+if EXAMPLES_CALCULATOR
+
+config EXAMPLES_CALCULATOR_PRIORITY
+	int "calculator task priority"
+	default 100
+
+config EXAMPLES_CALCULATOR_STACKSIZE
+	int "calculator stack size"
+	default 16384
+
+config EXAMPLES_CALCULATOR_INPUT_DEVPATH
+	string "Touchscreen device path"
+	default "/dev/input0"
+	---help---
+		The path to the touchscreen device. Default: "/dev/input0"
+
+config EXAMPLES_CALCULATOR_FBDEVPATH
+	string "Framebuffer device path"
+	default "/dev/fb0"
+	---help---
+		The path to the framebuffer device. Default: "/dev/fb0"
+
+endif # EXAMPLES_CALCULATOR

examples/calculator/Make.defs

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+############################################################################
+# apps/examples/calculator/Make.defs
+#
+# 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.
+#
+############################################################################
+
+ifneq ($(CONFIG_EXAMPLES_CALCULATOR),)
+CONFIGURED_APPS += $(APPDIR)/examples/calculator
+endif

examples/calculator/Makefile

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+############################################################################
+# apps/examples/calculator/Makefile
+#
+# 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.
+#
+############################################################################
+
+include $(APPDIR)/Make.defs
+
+PROGNAME = calc
+PRIORITY = $(CONFIG_EXAMPLES_CALCULATOR_PRIORITY)
+STACKSIZE = $(CONFIG_EXAMPLES_CALCULATOR_STACKSIZE)
+MODULE = $(CONFIG_EXAMPLES_CALCULATOR)
+
+MAINSRC = calculator_main.c
+
+include $(APPDIR)/Application.mk