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IIC之shell脚本驱动TM1637

2021-05-07 15:25:38 收藏此文章发表评论

安装了OPENWRT系统的AR9331模块，打开配置网页的时候，发现时钟走的很准，使用的是网络时间；于是有了这个想法，把TM1637数码管模块连接到AR9331模块的2个IO口，用模拟IIC的方法驱动TM1637来显示时间；上IO连接的电路图和脚本代码；

脚本

#9-1

#/root/TM1637/gpio_init.sh

#!/bin/sh

echo "22" > /sys/class/gpio/export
echo "23" > /sys/class/gpio/export
echo "out" > /sys/class/gpio/gpio22/direction
echo "out" > /sys/class/gpio/gpio23/direction

#9-2

#/root/TM1637/IIC_Start.sh

#!/bin/sh

echo "out" > /sys/class/gpio/gpio22/direction
echo "1" > /sys/class/gpio/gpio22/value        #sda
echo "1" > /sys/class/gpio/gpio23/value        #clk
echo "0" > /sys/class/gpio/gpio22/value        #sda
echo "0" > /sys/class/gpio/gpio23/value        #clk

#9-3

#/root/TM1637/IIC_Stop.sh

#!/bin/sh

echo "out" > /sys/class/gpio/gpio22/direction
echo "0" > /sys/class/gpio/gpio23/value     #clk=1
echo "0" > /sys/class/gpio/gpio22/value        #sda=0
echo "1" > /sys/class/gpio/gpio23/value         #clk
echo "1" > /sys/class/gpio/gpio22/value         #sda

#9-4

#/root/TM1637/IIC_Wait_Ack.sh

#!/bin/sh

timeout=1
echo in > /sys/class/gpio/gpio22/direction
echo "1" > /sys/class/gpio/gpio23/value         #clk
while [ $(cat /sys/class/gpio/gpio22/value) -eq 1 ]
do
   let timeout+=1
   if [ $timeout -gt 100 ]
   then
        /root/TM1637/IIC_Stop.sh
        exit 0
   fi
done
echo "0" > /sys/class/gpio/gpio23/value         #clk

#9-5

#/root/TM1637/IIC_Send_Byte_addr.sh

#!/bin/sh

echo "out" > /sys/class/gpio/gpio22/direction
echo "0" > /sys/class/gpio/gpio23/value         #clk
addr=`cat /tmp/addr`
for i in $(seq 1 8)
do
   out=$(($addr&0x01))
   addr=$(($addr>>1))
   echo $out > /sys/class/gpio/gpio22/value         #sda
   echo "1" > /sys/class/gpio/gpio23/value         #clk
   echo "0" > /sys/class/gpio/gpio23/value         #clk
done
/root/TM1637/IIC_Wait_Ack.sh

#9-6

#/root/TM1637/IIC_Send_Byte_data.sh

#!/bin/sh

echo "out" > /sys/class/gpio/gpio22/direction
echo "0" > /sys/class/gpio/gpio23/value         #clk
data=`cat /tmp/data`
for i in $(seq 1 8)
do
        out=$(($data&0x01))
        data=$(($data>>1))
        echo $out > /sys/class/gpio/gpio22/value         #sda
        echo "1" > /sys/class/gpio/gpio23/value         #clk
        echo "0" > /sys/class/gpio/gpio23/value         #clk
done
/root/TM1637/IIC_Wait_Ack.sh

#9-7

#/root/TM1637/TM1637_writeCMD.sh

#!/bin/sh

/root/TM1637/IIC_Start.sh
/root/TM1637/IIC_Send_Byte_data.sh
/root/TM1637/IIC_Stop.sh

#9-8

#/root/TM1637/TM1637_writeData.sh

#!/bin/sh

/root/TM1637/IIC_Start.sh
/root/TM1637/IIC_Send_Byte_addr.sh
/root/TM1637/IIC_Send_Byte_data.sh
/root/TM1637/IIC_Stop.sh

#9-9

#/root/TM1637/TM1637_display.sh

#!/bin/sh
eval s0=63
eval s1=6
eval s2=91
eval s3=79
eval s4=102
eval s5=109
eval s6=125
eval s7=7
eval s8=127
eval s9=111
eval s10=119
eval s11=124
eval s12=57
eval s13=94
eval s14=121
eval s15=113
time=`date +%H%M`
H10=`echo $time | cut -c 1`
H10=$(eval echo "$s$H10")
H01=`echo $time | cut -c 2`
H01=$(eval echo "$s$H01")
let H01+=128
M10=`echo $time | cut -c 3`
M10=$(eval echo "$s$M10")

M01=`echo $time | cut -c 4`
M01=$(eval echo "$s$M01")

echo "68" > /tmp/data
/root/TM1637/TM1637_writeCMD.sh

echo "192" > /tmp/addr
echo $H10 > /tmp/data
/root/TM1637/TM1637_writeData.sh
echo "193" > /tmp/addr
echo $H01 > /tmp/data
/root/TM1637/TM1637_writeData.sh
echo "194" > /tmp/addr
echo $M10 > /tmp/data
/root/TM1637/TM1637_writeData.sh
echo "195" > /tmp/addr
echo $M01 > /tmp/data
/root/TM1637/TM1637_writeData.sh

echo "139" > /tmp/data
/root/TM1637/TM1637_writeCMD.sh