Init

.gitignore

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+# Build directories
+/build/
+**/build/
+/cmake-build-*/
+
+# CMake
+/CMakeCache.txt
+**/CMakeCache.txt
+/CMakeFiles/
+**/CMakeFiles/
+/cmake_install.cmake
+**/cmake_install.cmake
+/compile_commands.json
+**/compile_commands.json
+/Makefile
+**/Makefile
+/CTestTestfile.cmake
+**/CTestTestfile.cmake
+/Testing/
+**/Testing/
+
+# Pico SDK and linker/generated files
+*.bin
+*.dis
+*.elf
+*.hex
+*.map
+*.uf2
+*.ld
+
+# IDE/editor
+.vscode/
+.idea/

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "external/rp_pico_display_engine"]
+	path = external/rp_pico_display_engine
+	url = https://github.com/stasenso/rp_pico_display_engine.git

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.18.4)
+include($ENV{PICO_SDK_PATH}/external/pico_sdk_import.cmake)
+
+project(my_app C CXX ASM)
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
+
+pico_sdk_init()
+
+set(DISPLAY_ENGINE_DIR ${CMAKE_CURRENT_LIST_DIR}/external/rp_pico_display_engine)
+
+add_library(display_engine STATIC
+    ${DISPLAY_ENGINE_DIR}/src/Font/font_data.c
+    ${DISPLAY_ENGINE_DIR}/src/core/display.c
+    ${DISPLAY_ENGINE_DIR}/src/core/display_transport.c
+    ${DISPLAY_ENGINE_DIR}/src/core/display_driver.c
+    ${DISPLAY_ENGINE_DIR}/src/render/context.c
+    ${DISPLAY_ENGINE_DIR}/src/render/line.c
+    # Uncomment if/when you need these primitives:
+    # ${DISPLAY_ENGINE_DIR}/src/render/grid.c
+    # ${DISPLAY_ENGINE_DIR}/src/render/sine_wave.c
+    # ${DISPLAY_ENGINE_DIR}/src/render/bezier.c
+)
+
+target_include_directories(display_engine PUBLIC
+    ${DISPLAY_ENGINE_DIR}/include
+    ${DISPLAY_ENGINE_DIR}/include/display
+)
+
+target_link_libraries(display_engine PUBLIC
+    pico_stdlib
+    hardware_spi
+    hardware_dma
+    hardware_timer
+    pico_multicore
+)
+
+target_compile_definitions(display_engine PUBLIC
+    DISPLAY_TYPE=DISPLAY_TYPE_ST7789
+    DISPLAY_SPI_PORT=spi1
+    DISPLAY_PIN_MOSI=15
+    DISPLAY_PIN_SCK=14
+    DISPLAY_PIN_CS=13
+    DISPLAY_PIN_DC=12
+    DISPLAY_PIN_RST=11
+    DISPLAY_PIN_BL=10
+)
+
+add_executable(my_app src/main.c)
+target_link_libraries(my_app PRIVATE display_engine)
+pico_add_extra_outputs(my_app)

src/main.c

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+#include "pico/stdlib.h"
+#include "display/display.h"
+#include "display/render/context.h"
+
+int main(void) {
+    stdio_init_all();
+
+    display_config_t cfg = {
+        .width = 320,
+        .height = 240,
+        .buffer_count = 1,
+        .mode = DISPLAY_MODE_SAFE
+    };
+    display_init(&cfg);
+
+    render_ctx_t rc;
+    uint32_t frame = 0;
+
+    while (1) {
+        uint16_t *buf = display_begin_paint_blocking();
+        render_begin(&rc, buf, 320, 240);
+        switch ((frame / 30u) % 4u) {
+            case 0:
+                render_clear(&rc, RGB16(255, 0, 0));
+                break;
+            case 1:
+                render_clear(&rc, RGB16(0, 255, 0));
+                break;
+            case 2:
+                render_clear(&rc, RGB16(0, 0, 255));
+                break;
+            default:
+                render_clear(&rc, RGB16(255, 255, 255));
+                break;
+        }
+        display_end_paint();
+        frame++;
+        sleep_ms(16);
+    }
+}