support for STM8 sduino ?

[g1ra]

Would it be possible to add support for SMT8 ? I would like to use with STM8 development board STM8S103F3P6

[ZinggJM]

Hi @g1ra , welcome to GxEPD2 discussions!

You could start with some research yourself:

• is this board supported by the Arduino development system?
• does it have required resources? available RAM, HW SPI? (a link to technical information would help)

[g1ra]

Hi @ZinggJM board is supported by Arduino env. I'm running currently on Arduino 2.3.4 , with some hack required installing .
Board have Program memory: 8 Kbyte Flash
RAM: 1 Kbyte

SPI interface (master/slave) up to 8 Mbit/s

RM0016 Reference manual for STM8S103F3P6

STM8S103F3P6 Datasheet

[ZinggJM]

Ok. I should have asked for the board package you use with the Arduino IDE.
From a Google search I found: https://github.com/tenbaht/sduino.
In that package I didn't find the HW SPI library. Maybe I didn't look close enough.
If there is no such library, or the HW SPI class is not named SPIClass, you would need to use a SW SPI workaround.

You can check if you can compile GxEPD2 for this processor.
In https://github.com/ZinggJM/GxEPD2/blob/work_in_progress/examples/GxEPD2_HelloWorld/GxEPD2_display_selection.h
comment out line 524 and line 727, and uncomment the constructor line for your display.
Adapt the pin parameters for your wiring, if you want to try to run the example.
You may need to reduce MAX_DISPLAY_BUFFER_SIZE , if the compiler complains about RAM size.
You may need to use my GFX class from https://github.com/ZinggJM/GFX_Root, if Adafruit_GFX doesn't compile for your board.

Good Luck!

[ZinggJM]

Bad Luck:

Most parts of the Arduino core system and some Arduino libraries are already ported to C-syntax. The resulting API is still very close to the C++ version and porting an existing application is not hard. Check out the migration guide for details.

Doesn't seem to support C++.

[g1ra]

got some error for pgmspace , so I had to remove pgmspace from GxEPD2_EPD.cpp

#if defined(ESP8266) || defined(ESP32)
#include <pgmspace.h>
#else
#include <avr/pgmspace.h>
#endif

and adding

#include <stm8s.h>

then looks like I got an error because of c++ (?)

at compiling GxEPD2_HelloWorld

/home/g1ra/.arduino15/packages/sduino/tools/sdcc/build.11242/bin/sdcc /home/g1ra/.cache/arduino/sketches/C7B499CB2DA440BCC2FB7102D13A254D/sketch/GxEPD2_HelloWorld.ino.cpp /home/g1ra/.cache/arduino/sketches/C7B499CB2DA440BCC2FB7102D13A254D/sketch/GxEPD2_HelloWorld.ino.cpp.o re2 -MMD -c -Ddouble=float -DUSE_STDINT -D__PROG_TYPES_COMPAT__ -Wp-Wall -mstm8 -DSTM8S103 -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_STM8S_BLUE -DARDUINO_ARCH_STM8 -I/home/g1ra/.arduino15/packages/sduino/hardware/stm8/0.5.0/cores/sduino -I/home/g1ra/.arduino15/packages/sduino/hardware/stm8/0.5.0/variants/standard -I/home/g1ra/Arduino/libraries/GxEPD2/src -I/home/g1ra/Arduino/libraries/Adafruit_GFX_Library -I/home/g1ra/Arduino/libraries/Adafruit_BusIO -I/home/g1ra/.arduino15/packages/sduino/hardware/stm8/0.5.0/libraries/Wire/src -I/home/g1ra/.arduino15/packages/sduino/hardware/stm8/0.5.0/STM8S_StdPeriph_Driver/inc -I/home/g1ra/.arduino15/packages/sduino/tools/sdcc/build.11242/share/sdcc/include
Mark re2:/home/g1ra/.arduino15/packages/sduino/tools/sdcc/build.11242/bin/sdcc -MMD -c -Ddouble=float -DUSE_STDINT -D__PROG_TYPES_COMPAT__ -Wp-Wall -mstm8 -DSTM8S103 -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_STM8S_BLUE -DARDUINO_ARCH_STM8 -I/home/g1ra/.arduino15/packages/sduino/hardware/stm8/0.5.0/cores/sduino -I/home/g1ra/.arduino15/packages/sduino/hardware/stm8/0.5.0/variants/standard -I/home/g1ra/Arduino/libraries/GxEPD2/src -I/home/g1ra/Arduino/libraries/Adafruit_GFX_Library -I/home/g1ra/Arduino/libraries/Adafruit_BusIO -I/home/g1ra/.arduino15/packages/sduino/hardware/stm8/0.5.0/libraries/Wire/src -I/home/g1ra/.arduino15/packages/sduino/hardware/stm8/0.5.0/STM8S_StdPeriph_Driver/inc -I/home/g1ra/.arduino15/packages/sduino/tools/sdcc/build.11242/share/sdcc/include /home/g1ra/.cache/arduino/sketches/C7B499CB2DA440BCC2FB7102D13A254D/sketch/GxEPD2_HelloWorld.ino.cpp -o /home/g1ra/.cache/arduino/sketches/C7B499CB2DA440BCC2FB7102D13A254D/sketch/GxEPD2_HelloWorld.ino.cpp.o
cpp gefunden
/home/g1ra/Arduino/libraries/Adafruit_BusIO/Adafruit_I2CDevice.h:8: syntax error: token -> 'Adafruit_I2CDevice' ; column 24

[ZinggJM]

then looks like I got an error because of c++ (?)

Yes.

No chance to use GxEPD2 with this Arduino package.

[g1ra]

@ZinggJM Thanks for looking into this .
Sorry I forgot to confirm I'm using SDUINO .

Have a nice day,