在命令行使用i2c-tools配置Si5341，将配置写入文件读取。
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#!/bin/sh
I2C_BUS_No=0
I2C_DEV_Si5341_ADDR=0x72
Si5341_PAGE_No=0 # Si5341寄存器关键信息页
cmds=() # 将命令作为数组形式
num_cmds=0
function config_i2c_hub(){
# i2cdetect -r -y ${I2C_BUS_No}
# 打开i2c hub 通道2 ，i2c 总线上可以扫描到目标设备
#（Si5341挂在i2c hub后，需要先打开hub通道）
i2cset -y ${I2C_BUS_No} 0x74 0x02
}
# ================================================================================
# ["wrreg" "page" "u8addr" "u8var"]
# ["delay" "time_ms"]
function line_to_cmd(){
echo $LINE | grep delay 1>/dev/null
check_delay=`echo $?`
if [[ $check_delay == "0" ]];then
# echo "seen as delay cmd"
echo "delay ${LINE##* }"
else
# echo "seen as wrreg cmd"
substr1=${LINE#*0x}
regaddr=${substr1:0:4}
substr2=${substr1#*0x}
val=${substr2:0:2}
# echo "substr1 :$substr1"
# echo "substr2 :$substr2"
# echo "regaddr :$regaddr"
# echo "val :$val"
echo "wrreg 0x${regaddr:0:2} 0x${regaddr:2:2} 0x${val}"
fi
}
function traverse_file_to_bottm(){
while read LINE
do
if [[ $LINE == "" ]];then
continue
fi
# echo "This line is : $LINE"
cmds[${num_cmds}]=`line_to_cmd $LINE`
num_cmds=$((num_cmds+1))
done < ${1}
}
function Si5341_read_reg(){
i2cget -y ${I2C_BUS_No} ${I2C_DEV_Si5341_ADDR} $1
}
function Si5341_write_reg(){
dst_page_No=${1}
reg_addr=${2}
val=${3}
# echo "dst_page_No is ${dst_page_No}"
# echo "reg_addr is ${reg_addr}"
# echo "val is ${val}"
if [[ $dst_page_No != $Si5341_PAGE_No ]];then
i2cset -y ${I2C_BUS_No} ${I2C_DEV_Si5341_ADDR} 0x1 ${dst_page_No}
echo "chang page to ${dst_page_No}"
Si5341_PAGE_No=$dst_page_No
fi
i2cset -y ${I2C_BUS_No} ${I2C_DEV_Si5341_ADDR} ${reg_addr} ${val}
}
function exec_cmd(){
if [[ $1 == "wrreg" ]];then
# echo "wrreg cmd"
Si5341_write_reg $2 $3 $4
elif [[ $1 == "delay" ]];then
# echo "delay cmd"
sleep 1
fi
}
# main()
config_i2c_hub
Si5341_PAGE_No=`Si5341_read_reg 0x01`
echo "current Si5341_PAGE_No: $Si5341_PAGE_No"
traverse_file_to_bottm $1
for((i=0;i<num_cmds;i++))
do
# echo "cmds[${i}] is ${cmds[$i]}"
exec_cmd ${cmds[$i]}
done
参考的配置文件内容
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{ 0x0B24, 0xC0 },
{ 0x0B25, 0x00 },
{ 0x0502, 0x01 },
{ 0x0505, 0x03 },
{ 0x0957, 0x17 },
{ 0x0B4E, 0x1A },
delay 300
{ 0x0006, 0x00 },
{ 0x0007, 0x00 },
{ 0x0008, 0x00 },
{ 0x000B, 0x74 },
{ 0x0017, 0xD0 },
{ 0x0018, 0xFF },
{ 0x0021, 0x0F },
{ 0x0022, 0x00 },
{ 0x002B, 0x02 },
{ 0x002C, 0x20 },
{ 0x002D, 0x00 },
{ 0x002E, 0x00 },
{ 0x002F, 0x00 },
{ 0x0030, 0x00 },
{ 0x0031, 0x00 },
{ 0x0032, 0x00 },
{ 0x0033, 0x00 },
...
...
...
{ 0x0B57, 0x0E },
{ 0x0B58, 0x01 },
{ 0x001C, 0x01 },
{ 0x0B24, 0xC3 },
{ 0x0B25, 0x02 },