update ds18b20 source code

Guo Wenxue

2022-09-21 93fb646dc67d6339e75a6787d629bbe3c45b9b37

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