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The sample code encompasses operations associated with the NN model, along with preprocessing and postprocessing related to the NN model. We need to cross-compile this code into an application that can execute on c3v C3V Linux. Additionally, we should utilize it along with the generated NB file.

1. Building

1.1. Linux

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Terminal Cross Compile

When compiling NN-related applications, it is necessary to include SDK's headers and libraries.

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BIN=sampleApp

VIVANTE_SDK_DIR=Path to VIVANTE SDK directory
TOOLCHAIN=Path to toolchain directory

VIVANTE_SDK_INC=$(VIVANTE_SDK_DIR)/include
VIVANTE_SDK_LIB=$(VIVANTE_SDK_DIR)/lib

CROSS_COMPILE=$(TOOLCHAIN)/aarch64-none-linux-gnu-

CC=$(CROSS_COMPILE)gcc
CXX=$(CROSS_COMPILE)g++

CFLAGS=-Wall -O3

INCLUDE += -I$(VIVANTE_SDK_INC) -I$(VIVANTE_SDK_INC)/HAL -I$(VIVANTE_SDK_INC)/ovxlib
LIBS += -L$(VIVANTE_SDK_LIB) -L./ -L$(STD_LOG_INC)
LIBS += -lOpenVX -lOpenVXU -lOpenVX -lCLC -lVSC -lGAL -ljpeg -lovxlib -lm
LIBS += -lNNArchPerf -lArchModelSw
LIBS += -lstdc++ -ldl -lpthread -lgcc_s

CFLAGS += $(INCLUDE) -fPIC

SRCS=${wildcard *.c}
SRCS+=${wildcard *.cpp}

OBJS=$(addsuffix .o, $(basename $(SRCS)))

.SUFFIXES: .hpp .cpp .c 

.cpp.o:
	$(CXX) $(CFLAGS) -std=c++11 -c $<

.c.o:
	$(CC) $(CFLAGS) -c $<

all: $(BIN)

$(BIN): $(OBJS)
	$(CC) $(CFLAGS) $(LFLAGS) $(OBJS) -o $@ $(LIBS) 
	rm -rf *.o

clean:
	rm -rf *.o
	rm -rf $(BIN) $(LIB)
	rm -rf *~

1.2. Vivante IDE Cross Compile

Environment Preparations

• C3V toolchain

toolchain\crossgcc\gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu

• C3V OVXLIB files

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Import

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Project

select File->import:

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select "General->Existing Projects into Workspace":

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select the checkbox of the project and the checkbox of "copy project into workspace". Then press "Finish" to import the project.

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Setting

This step sets the cross-compiler as the C3V toolchain and the library search path as the C3V OVXLIB folder. In the IDE main window, select "Project->Properties". Select "Tool Chain Editor" in the pop-up window. In "Current toolchain", select "Cross Gcc with openVX":

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Choose "Settings" and select "Cross Settings", please configure the Prefix and Path of the C3V toolchain. configure the C3V OVXLIB search path. Then press "OK".

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Build

Right-click on the model project in the Project Explorer pane, and select Build Project. The build results will appear in the Console pane.

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After building success, the binary file is in the folder "Project/Debug/"

2. Running on the C3V Linux

Copy the application into C3V Linux and running:

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