//异或校验
function chk8xor(hexarr) {
var bcc = 0;
var xor = 0;
for(var i= 0; i< hexarr.length; i++){
var hexint = parseInt(hexarr[i],16);
if(i==0){ xor = hexint; }
else {
bcc = xor ^ hexint;
xor = bcc;
}
}
return fillZero(bcc.toString(16),2)
}
//字符串长度判断不足填充0
function fillZero(num, n) {
var len = num.toString().length;
while(len < n) {
num = "0" + num;
len++;
}
return num;
}
//字符串转为数组
function str2Arr(str,num){
var arr = [];
var len = str.length;
for (let index = 0; index < len; index+=num) {
arr.push(str.slice(index,index+num));
}
return arr;
}
console.log(chk8xor(str2Arr('01A07CFF02',2)));
//输出20
