sample: gui: Added basic sample for lvgl library

Added a basic sample showing how to use the LittlevGL library in an application. Signed-off-by: Jan Van Winkel <[email protected]>
zephyrproject-rtos · Jan 7, 2019 · 2a694ed · 2a694ed
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diff --git a/samples/gui/gui.rst b/samples/gui/gui.rst
@@ -0,0 +1,10 @@
+.. _gui-samples:
+
+GUI Samples
+###########
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   **/*
diff --git a/samples/gui/lvgl/CMakeLists.txt b/samples/gui/lvgl/CMakeLists.txt
@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.8.2)
+macro(set_conf_file)
+  if(EXISTS ${APPLICATION_SOURCE_DIR}/prj_${BOARD}.conf)
+    set(CONF_FILE "${APPLICATION_SOURCE_DIR}/prj_${BOARD}.conf")
+  elseif(EXISTS ${APPLICATION_SOURCE_DIR}/boards/${BOARD}.conf)
+    set(CONF_FILE
+      "prj.conf ${APPLICATION_SOURCE_DIR}/boards/${BOARD}.conf")
+  else()
+    set(CONF_FILE "prj.conf")
+  endif()
+endmacro()
+
+include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+project(lvgl)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})
diff --git a/samples/gui/lvgl/README.rst b/samples/gui/lvgl/README.rst
@@ -0,0 +1,75 @@
+.. _lvgl-sample:
+
+LittlevGL Basic Sample
+######################
+
+Overview
+********
+
+This sample application displays "Hello World" in the center of the screen
+and a counter at the bottom which increments every second.
+
+Requirements
+************
+
+- `nRF52840 Preview development kit`_
+- `Adafruit 2.2 inch TFT Display`_
+
+or a simulated display environment in a native Posix application:
+
+- :ref:`native_posix`
+- `SDL2`_
+
+Wiring
+******
+
+The nrf52840 Preview development kit should be connected as follows to the
+Adafruit TFT display.
+
++-------------+----------------+
+| | nrf52840  | | Adafruit TFT |
+| | Pin       | | Pin          |
++=============+================+
+| P0.27       | SCK            |
++-------------+----------------+
+| P0.31       | D/C            |
++-------------+----------------+
+| P0.30       | RST            |
++-------------+----------------+
+| P0.26       | MOSI           |
++-------------+----------------+
+| P0.29       | MISO           |
++-------------+----------------+
+| P0.4        | NSS            |
++-------------+----------------+
+
+Building and Running
+********************
+
+Build this sample using the following commands:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/gui/lvgl
+   :board: nrf52840_pca10056
+   :goals: build
+   :compact:
+
+See :ref:`nrf52840_pca10056` on how to flash the build.
+
+or
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/gui/lvgl
+   :board: native_posix
+   :goals: build
+   :compact:
+
+References
+**********
+
+.. target-notes::
+
+.. _LittlevGL Web Page: https://littlevgl.com/
+.. _Adafruit 2.2 inch TFT Display: https://www.adafruit.com/product/1480
+.. _nRF52840 Preview development kit: http://www.nordicsemi.com/eng/Products/nRF52840-Preview-DK
+.. _SDL2: https://www.libsdl.org
diff --git a/samples/gui/lvgl/boards/native_posix.conf b/samples/gui/lvgl/boards/native_posix.conf
@@ -0,0 +1,5 @@
+CONFIG_SDL_DISPLAY=y
+CONFIG_SDL_DISPLAY_DEV_NAME="DISPLAY"
+CONFIG_SDL_DISPLAY_X_RES=320
+CONFIG_SDL_DISPLAY_Y_RES=240
+
diff --git a/samples/gui/lvgl/boards/nrf52840_pca10056.conf b/samples/gui/lvgl/boards/nrf52840_pca10056.conf
@@ -0,0 +1,7 @@
+CONFIG_SPI=y
+CONFIG_SPI_1=y
+CONFIG_SPI_NRFX=y
+
+CONFIG_ILI9340=y
+
+CONFIG_LVGL_BITS_PER_PIXEL=24
diff --git a/samples/gui/lvgl/boards/reel_board.conf b/samples/gui/lvgl/boards/reel_board.conf
@@ -0,0 +1,9 @@
+CONFIG_SPI=y
+CONFIG_SSD1673=y
+
+CONFIG_LVGL_COLOR_DEPTH_1=y
+CONFIG_LVGL_BITS_PER_PIXEL=1
+CONFIG_LVGL_HOR_RES=250
+CONFIG_LVGL_VER_RES=120
+CONFIG_LVGL_DPI=130
+CONFIG_LVGL_VDB_SIZE=16
diff --git a/samples/gui/lvgl/dts_fixup.h b/samples/gui/lvgl/dts_fixup.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2018 Jan Van Winkel <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#if defined(CONFIG_SPI_NRFX) && defined(CONFIG_ILI9340)
+
+#define DT_ILI9340_SPI_DEV_NAME \
+	DT_NORDIC_NRF_SPI_40004000_ILITEK_ILI9340_0_BUS_NAME
+
+#define DT_ILI9340_SPI_SLAVE_NUMBER \
+	DT_NORDIC_NRF_SPI_40004000_ILITEK_ILI9340_0_BASE_ADDRESS
+
+#define DT_ILI9340_CMD_DATA_GPIO_PORT_NAME \
+	DT_NORDIC_NRF_SPI_40004000_ILITEK_ILI9340_0_CMD_DATA_GPIOS_CONTROLLER
+
+#define DT_ILI9340_CMD_DATA_PIN \
+	DT_NORDIC_NRF_SPI_40004000_ILITEK_ILI9340_0_CMD_DATA_GPIOS_PIN
+
+#define DT_ILI9340_DEV_NAME \
+	DT_NORDIC_NRF_SPI_40004000_ILITEK_ILI9340_0_LABEL
+
+#define DT_ILI9340_RESET_GPIO_PORT_NAME \
+	DT_NORDIC_NRF_SPI_40004000_ILITEK_ILI9340_0_RESET_GPIOS_CONTROLLER
+
+#define DT_ILI9340_RESET_PIN \
+	DT_NORDIC_NRF_SPI_40004000_ILITEK_ILI9340_0_RESET_GPIOS_PIN
+
+#define DT_ILI9340_SPI_FREQ \
+	DT_NORDIC_NRF_SPI_40004000_ILITEK_ILI9340_0_SPI_MAX_FREQUENCY
+
+#define DT_ILI9340_CS_GPIO_PORT_NAME \
+	DT_NORDIC_NRF_SPI_40004000_CS_GPIOS_CONTROLLER
+
+#define DT_ILI9340_CS_GPIO_PIN \
+	DT_NORDIC_NRF_SPI_40004000_CS_GPIOS_PIN
+
+#endif
+
diff --git a/samples/gui/lvgl/nrf52840_pca10056.overlay b/samples/gui/lvgl/nrf52840_pca10056.overlay
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2018 Jan Van Winkel <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&spi1 {
+	status = "ok";
+	cs-gpios = <&gpio0 4 0>;
+
+	ili9340@0 {
+		compatible = "ilitek,ili9340";
+		label = "DISPLAY";
+		spi-max-frequency = <15151515>;
+		reg = <0>;
+		reset-gpios = <&gpio0 30 0>;
+		cmd-data-gpios = <&gpio0 31 0>;
+	};
+};
diff --git a/samples/gui/lvgl/prj.conf b/samples/gui/lvgl/prj.conf
@@ -0,0 +1,8 @@
+CONFIG_HEAP_MEM_POOL_SIZE=16384
+
+CONFIG_DISPLAY=y
+CONFIG_DISPLAY_LOG_LEVEL_ERR=y
+
+CONFIG_LOG=y
+
+CONFIG_LVGL=y
diff --git a/samples/gui/lvgl/reel_board.overlay b/samples/gui/lvgl/reel_board.overlay
@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2018 Jan Van Winkel <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&spi3 {
+	ssd1673fb@0 {
+		label = "DISPLAY";
+	};
+};
diff --git a/samples/gui/lvgl/sample.yaml b/samples/gui/lvgl/sample.yaml
@@ -0,0 +1,8 @@
+sample:
+  description: LVGL sample application
+  name: lvgl
+tests:
+  test:
+    harness: display
+    platform_whitelist: nrf52840_pca10056 reel_board
+    tags: samples display gui
diff --git a/samples/gui/lvgl/src/main.c b/samples/gui/lvgl/src/main.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2018 Jan Van Winkel <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <device.h>
+#include <display.h>
+#include <lvgl.h>
+#include <stdio.h>
+#include <string.h>
+#include <zephyr.h>
+
+#define LOG_LEVEL CONFIG_LOG_DEFAULT_LEVEL
+#include <logging/log.h>
+LOG_MODULE_REGISTER(app);
+
+void main(void)
+{
+	u32_t count = 0;
+	char count_str[11] = {0};
+	struct device *display_dev;
+	lv_obj_t *hello_world_label;
+	lv_obj_t *count_label;
+
+	display_dev = device_get_binding("DISPLAY");
+
+	if (display_dev == NULL) {
+		LOG_ERR("device not found.  Aborting test.");
+		return;
+	}
+
+	hello_world_label = lv_label_create(lv_scr_act(), NULL);
+	lv_label_set_text(hello_world_label, "Hello world!");
+	lv_obj_align(hello_world_label, NULL, LV_ALIGN_CENTER, 0, 0);
+
+	count_label = lv_label_create(lv_scr_act(), NULL);
+	lv_obj_align(count_label, NULL, LV_ALIGN_IN_BOTTOM_MID, 0, 0);
+
+	display_blanking_off(display_dev);
+
+	while (1) {
+		if ((count % 100) == 0) {
+			sprintf(count_str, "%d", count/100);
+			lv_label_set_text(count_label, count_str);
+		}
+		lv_task_handler();
+		k_sleep(10);
+		++count;
+	}
+}
diff --git a/samples/samples.rst b/samples/samples.rst
@@ -22,6 +22,7 @@ Samples and Demos
    display/*
    shields/*
    portability/*
+   gui/*
 
 To add a new sample document, please use the template available under
 :file:`doc/templates/sample.tmpl`