HAL for HAGL graphics library for display drivers supporting the MIPI Display Command Set. This covers most displays currently used by hobbyists. Tested with ST7735S (Longan Nano) and ST7789 (TTGO T-Display GD32).
To use with an Nuclei SDK project you include this HAL and the HAGL graphics library itself.
$ cd external
$ git submodule add https://github.com/tuupola/hagl_gd32v_mipi.git hagl_hal
$ git submodule add https://github.com/tuupola/hagl.git
Then in your Makefile include the new source and header files.
SRCDIRS = . external/hagl/src external/hagl_hal/src
INCDIRS = . external/hagl/include external/hagl_hal/include
By default the HAL uses single buffering. The buffer is the GRAM of the display driver chip. You can enable double buffering with flags.
COMMON_FLAGS += -DHAGL_HAL_USE_DOUBLE_BUFFER
The default config can be found in hagl_hal.h. Defaults are ok for Longan Nano in vertical mode. You can override settings by including an use config file.
COMMON_FLAGS += -include ./hagl_user_config.h
An example project Makefile which both enables double buffering and overrides default config would look like following:
TARGET = firmware
NUCLEI_SDK_ROOT = ../nuclei-sdk
SRCDIRS = . external/hagl/src external/hagl_hal/src
INCDIRS = . external/hagl/include external/hagl_hal/include
COMMON_FLAGS += -DHAGL_HAL_USE_DOUBLE_BUFFER
COMMON_FLAGS += -include ./hagl_user_config.h
include $(NUCLEI_SDK_ROOT)/Build/Makefile.base
/* Single buffered */
61297 PIXELS per second, FB 0 FPS
962 LINES per second, FB 0 FPS
756 CIRCLES per second, FB 0 FPS
279 FILLED CIRCLES per second, FB 0 FPS
492 ELLIPSES per second, FB 0 FPS
100 FILLED ELLIPSES per second, FB 0 FPS
316 TRIANGLES per second, FB 0 FPS
189 FILLED TRIANGLES per second, FB 0 FPS
2295 RECTANGLES per second, FB 0 FPS
230 FILLED RECTANGLES per second, FB 0 FPS
1360 ROUND RECTANGLES per second, FB 0 FPS
223 FILLED ROUND RECTANGLES per second, FB 0 FPS
193 POLYGONS per second, FB 0 FPS
114 FILLED POLYGONS per second, FB 0 FPS
6394 CHARACTERS per second, FB 0 FPS
480 STRINGS per second, FB 0 FPS
33 RGB BARS per second, FB 0 FPS
/* Double buffered */
397087 PIXELS per second, FB 0 FPS
29462 LINES per second, FB 0 FPS
24498 CIRCLES per second, FB 0 FPS
13028 FILLED CIRCLES per second, FB 0 FPS
13252 ELLIPSES per second, FB 0 FPS
5228 FILLED ELLIPSES per second, FB 0 FPS
10316 TRIANGLES per second, FB 0 FPS
548 FILLED TRIANGLES per second, FB 0 FPS
18202 RECTANGLES per second, FB 0 FPS
13733 FILLED RECTANGLES per second, FB 0 FPS
16931 ROUND RECTANGLES per second, FB 0 FPS
12097 FILLED ROUND RECTANGLES per second, FB 0 FPS
6236 POLYGONS per second, FB 0 FPS
327 FILLED POLYGONS per second, FB 0 FPS
33755 CHARACTERS per second, FB 0 FPS
2632 STRINGS per second, FB 0 FPS
2040 RGB BARS per second, FB 0 FPS
The MIT License (MIT). Please see License File for more information.