update ds18b20.c, add pin connected way

guowenxue

2021-11-03 fcfb88f7bb207b825c3f59a8a0859f1e9146420c

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INST_PATH=/usr/bin
 
BIN_FILES=comport
 
all: clean 
    gcc *.c -o ${BIN_FILES}
 
 
clean: 
    rm -f ${BIN_FILES}
 
install: 
    @cp ${BIN_FILES} ${INST_PATH}