Port portduino library to ease porting Arduino programs to Circle

[hjanetzek]

Hello just throwing in an idea - I was thinking what route to go to run MicroDexed-touch on a Pi. It's probably not too much work to adapt it to use Circle API directly (it will be more work to port the required parts of the Teensy audio library). Anyway I could imagine that having an Arduino layer would get much more people interested to use Circle.

https://github.com/geeksville/framework-portduino

[hjanetzek]

The Teensy Arduino implementation could also be a good starting point
https://www.pjrc.com/teensy/teensyduino.html
https://github.com/PaulStoffregen/cores/tree/master/teensy4

[rsta2]

Good idea. Unfortunately I'm full of work for months. So everybody is invited to do this. But it's not only the effort to port it, it must be maintained over time. BTW. There is already a Dexed-port to the Raspberry Pi, which uses Circle: https://github.com/probonopd/MiniDexed It does not support a touch screen, but perhaps it would be easier to add a GUI to MiniDexed by using the LVGL support in Circle, if it is wanted.

[dolence]

Sorry for hijacking this discussion, but I'm working on this right now. Actually, I'm having a problem building LVGL with MiniDexed:

echo "  CC    ../CMSIS_5/CMSIS/DSP/Source/CommonTables/CommonTables.o"
make[1]: *** No rule to make target 'lvgl.h', needed by 'kernel.o'.
aarch64-none-elf-gcc -Wno-parentheses  -DAARCH=64 -mcpu=cortex-a53 -mlittle-endian -DAARCH=64 -mcpu=cortex-a53 -mlittle-endian -Wall -fsigned-char -ffreestanding -g -DUSE_FX -DUSE_PWM_AUDIO_ON_ZERO -DSAVE_VFP_REGS_ON_IRQ -DREALTIME -DSCREEN_DMA_BURST_LENGTH=1 -DARM_ALLOW_MULTI_CORE -DKERNEL_MAX_SIZE=0x400000 -D__circle__=450301 -DRASPPI=3 -DSTDLIB_SUPPORT=3 -D__VCCOREVER__=0x04000000 -U__unix__ -U__linux__  -I ../Synth_Dexed/src -I ../CMSIS_5/CMSIS/Core/Include -I ../CMSIS_5/CMSIS/DSP/Include -I ../CMSIS_5/CMSIS/DSP/PrivateInclude -I ../CMSIS_5/CMSIS/DSP/ComputeLibrary/Include -I ../circle-stdlib/libs/circle/include -I ../circle-stdlib/libs/circle/addon -I ../circle-stdlib/libs/circle/app/lib -I ../circle-stdlib/libs/circle/addon/vc4 -I ../circle-stdlib/libs/circle/addon/vc4/interface/khronos/include -I ../circle-stdlib/include -I ../circle-stdlib/install/aarch64-none-circle/include  -O3 -std=gnu99 -c -o ../CMSIS_5/CMSIS/DSP/Source/CommonTables/CommonTables.o ../CMSIS_5/CMSIS/DSP/Source/CommonTables/CommonTables.c
make: *** [Makefile:11: minidexed] Error 2

I have a Makefile added to compile circle-stlib, lvgl and MiniDexed:

SHELL := /bin/bash
TOOLCHAIN_HOME=$(shell pwd)/gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf/bin
PATH := ${PATH}:${TOOLCHAIN_HOME}
TOOLCHAIN_PREFIX=aarch64-none-elf-
OPTIONS=-o USE_PWM_AUDIO_ON_ZERO -o SAVE_VFP_REGS_ON_IRQ -o REALTIME -o SCREEN_DMA_BURST_LENGTH=1 -o ARM_ALLOW_MULTI_CORE
RPI=3

all: circle minidexed

minidexed:
	$(MAKE) -C src -j

circle:
	@echo "Building circle-stdlib..."

	$(MAKE) -C circle-stdlib -j

	@echo "Building circle-stdlib additional libraries..."
	$(MAKE) -C circle-stdlib/libs/circle/addon/display -j
	$(MAKE) -C circle-stdlib/libs/circle/addon/sensor -j
	$(MAKE) -C circle-stdlib/libs/circle/addon/Properties -j
	$(MAKE) -C circle-stdlib/libs/circle/addon/lvgl -j

circle_config:
	$(MAKE) -C circle-stdlib mrproper || true
	./circle-stdlib/configure -r ${RPI} --prefix ${TOOLCHAIN_PREFIX} ${OPTIONS} -o KERNEL_MAX_SIZE=0x400000

card:
	$(MAKE) -C circle-stdlib/libs/circle/boot
	$(MAKE) -C circle-stdlib/libs/circle/boot armstub64
	cp ./src/kernel*.img ./kernels/; \
	cp -r ./circle-stdlib/libs/circle/boot/* sdcard; \
	rm -rf sdcard/config*.txt sdcard/README sdcard/Makefile sdcard/armstub sdcard/COPYING.linux; \
	cp ./src/config.txt ./src/minidexed.ini ./src/*img ./src/performance.ini sdcard; \
	echo "usbspeed=full" > sdcard/cmdline.txt; \
	cd sdcard; \
	cp ../kernels/* .;\
	cd -;

getsysex:
	$(shell cd sdcard; ../getsysex.sh; cd..)

Also, on MiniDexed src I made the addition to the libcircle.a lib:

#
# Rules.mk
#

-include $(CIRCLE_STDLIB_DIR)/Config.mk

NEWLIBDIR   ?= $(CIRCLE_STDLIB_DIR)/install/$(NEWLIB_ARCH)
CIRCLEHOME  ?= $(CIRCLE_STDLIB_DIR)/libs/circle

include $(CIRCLEHOME)/Rules.mk

INCLUDE += \
	   -I $(CIRCLE_STDLIB_DIR)/include \
	   -I $(NEWLIBDIR)/include


LIBS += \
 	$(NEWLIBDIR)/lib/libm.a \
	$(NEWLIBDIR)/lib/libc.a \
	$(NEWLIBDIR)/lib/libcirclenewlib.a \
	$(CIRCLEHOME)/addon/lvgl/liblvgl.a \
	$(CIRCLEHOME)/addon/display/libdisplay.a \
	$(CIRCLEHOME)/addon/sensor/libsensor.a \
	$(CIRCLEHOME)/addon/Properties/libproperties.a \
	$(CIRCLEHOME)/addon/SDCard/libsdcard.a \
  	$(CIRCLEHOME)/lib/usb/libusb.a \
	$(CIRCLEHOME)/lib/usb/gadget/libusbgadget.a \
 	$(CIRCLEHOME)/lib/input/libinput.a \
	$(CIRCLEHOME)/lib/sound/libsound.a \
 	$(CIRCLEHOME)/addon/fatfs/libfatfs.a \
 	$(CIRCLEHOME)/lib/fs/libfs.a \
  	$(CIRCLEHOME)/lib/sched/libsched.a \
	$(CIRCLEHOME)/lib/libcircle.a



-include $(DEPS)

Am I missing something? Any toughts on this?

[rsta2]

lvgl.h is not found. It must be included as <lvgl/lvgl.h>. The directory circle-stdlib/libs/circle/addon/ is in the standard include path.

[hjanetzek]

Hey @dolence thanks for the info :)

@rsta2 yea it's probably quite a bit of work to be done properly and chances are low that this project reaches the top of my want-to-do stack