#!/bin/sh

EMC1413_Channel0_name="Channel 0"
EMC1413_Channel1_name="Channel 1"
EMC1413_Channel2_name="Channel 2"

REG_emc1413_TD1_H="0x00"
REG_emc1413_TD1_L="0x29"
REG_emc1413_TD2_H="0x01"
REG_emc1413_TD2_L="0x10"
REG_emc1413_TD3_H="0x23"
REG_emc1413_TD3_L="0x24"

# 处理EMC1413读到的数据并输出结果
# @Param1 emc1413读取数据高位
# @Param2 emc1413读取数据低位
# @Param3 channel号/定制化名称
convert_emc1413_data(){
    # 将读取到的两位数据去掉 0x 前缀
    hex_value1=$(echo "$1" | awk '{sub(/^0x/,""); print}')
    hex_value2=$(echo "$2" | awk '{sub(/^0x/,""); print}')

    # 由于 bc 计算器只能识别大写的 十六进制数据，将小写的十六进制数据全部转化为大写的数据
    upper_hex_value1=$(echo "$hex_value1" | awk '{ 
        for(i=1; i<=length($0); i++){ 
            if(tolower(substr($0,i,1)) ~ /^[a-f]$/) 
                printf toupper(substr($0,i,1)); 
            else 
                printf substr($0,i,1); 
        } 
        print "" 
    }')
    upper_hex_value2=$(echo "$hex_value2" | awk '{ 
        for(i=1; i<=length($0); i++){ 
            if(tolower(substr($0,i,1)) ~ /^[a-f]$/) 
                printf toupper(substr($0,i,1)); 
            else 
                printf substr($0,i,1); 
        } 
        print "" 
    }')

    # 转化为10进制数据
    dec_value1=$(echo "ibase=16; $upper_hex_value1" | bc)
    dec_value2=$(echo "ibase=16; $upper_hex_value2" | bc)

    # 计算温度值
    temp=$(echo "scale=4; $dec_value1 + ($dec_value2 / 32 * 0.125 )" | bc)

    # 格式化输出数据
    format_temp=$(echo "$temp" | awk '{ if ($0 ~ /^\./) print "0" $0; else print $0 }')

    echo "$3 : $format_temp C, hex value : $hex_value1 $hex_value2"

}

# 读取EMC1413芯片每个通道的数据,随后调用数据处理函数进行数据解析并输出
read_emc1413_channel_value(){

    format_log_print $INFO "Start EMC1413 channel data ..."

    res_td1_h=`i2ctransfer -y $i2c_bus w1@$chip_slave $REG_emc1413_TD1_H r1`
    res_td1_l=`i2ctransfer -y $i2c_bus w1@$chip_slave $REG_emc1413_TD1_L r1`
    res_td2_h=`i2ctransfer -y $i2c_bus w1@$chip_slave $REG_emc1413_TD2_H r1`
    res_td2_l=`i2ctransfer -y $i2c_bus w1@$chip_slave $REG_emc1413_TD2_L r1`
    res_td3_h=`i2ctransfer -y $i2c_bus w1@$chip_slave $REG_emc1413_TD3_H r1`
    res_td3_l=`i2ctransfer -y $i2c_bus w1@$chip_slave $REG_emc1413_TD3_L r1`

    # 将 I2C 读取的 raw 数据记录到调试日志中
    format_log_print $INFO "channel 1 : $res_td1_h $res_td1_l"
    format_log_print $INFO "channel 2 : $res_td2_h $res_td2_l"
    format_log_print $INFO "channel 3 : $res_td3_h $res_td3_l"

    # start parse raw data
    echo ">>> The emc1413 value is:"
    convert_emc1413_data $res_td1_h $res_td1_l $EMC1413_Channel0_name 
    convert_emc1413_data $res_td2_h $res_td2_l $EMC1413_Channel1_name
    convert_emc1413_data $res_td3_h $res_td3_l $EMC1413_Channel2_name

}