时间转换为十六进制（字节数组）和反转

Question

我从昨天开始尝试找出这个公式的反面：我使用 HART（高速可寻址远程传感器）协议，规范是这样说的：

"... for the DEFAULT_VALUE, the constant-expression must resolve to an unsigned 4-byte or 8-byte integer. example 4-byte TIME_VALUE encoding for 05:14:26 could be expressed as: DEFAULT_VALUE = ((5*60+14)*60+26)*32000;"

这个值等于：603712000 -> 到字节数组 -> 23 FB EA 00

任何人都可以帮我找到反向公式吗？例如 444800000 -> 到字节数组 -> 1A 83 1C 00.. 这个数字首先除以 32000 等于：13900，从这里我想获得可读的时间格式：hh:mm:ss (就像上面的例子）。

我实现了这个功能，但似乎没有像我预期的那样工作：

secondsPassedToTime = function (seconds) {

    var decimalTime = seconds / 86400;
    var hour = decimalTime * 24;
    var minutes = (hour % 1) * 60 // --> (hour % 1) -> get fractional part from number: 1.9 = 1 + 0.9
    var seconds = (minutes % 1) * 60

    hour = (~~hour).toString().length < 2 ? "0" + (~~hour).toString() : (~~hour).toString(); // --> (~~hour) -> get int from float: 1.9 = 1
    minutes = (~~minutes).toString().length < 2 ? "0" + (~~minutes).toString() : (~~minutes).toString();
    seconds = (~~seconds).toString().length < 2 ? "0" + (~~seconds).toString() : (~~seconds).toString();

    var time = hour.toString() + ":" + minutes.toString() + ":" + seconds.toString();
    return time;
};
console.log(secondsPassedToTime(13900))

这里我得到了一种可能的可读格式，但是当我将其转换为字节数组时，1a 83 1c 00 完全是另一个值。1A 82 9F 00。其中一个函数无法正常工作。

timeToHartTimeByteArray = function (time) {

    var byteArray = new Array();
    var regex = /^[0-9]{2}\:[0-9]{2}\:[0-9]{2}/;
    if (time.match(regex)) {
        time = time;
    }
    else {
        throw "Invalid format for TIME! Format must be: hh:mm:ss";
    }
    var time = time.split(":");
    var hours = parseFloat(time[0]) * 3600;
    var minutes = parseFloat(time[1]) * 60;
    var seconds = parseFloat(time[2]);
    var finalTime = hours + minutes + seconds;

    finalTime = finalTime * 32000;

    var hexTime = finalTime.toString(16)

    if (hexTime.length != 8) {
        var hexTime = "0" + hexTime;
        byteArray.push(hexTime.slice(0, 2))
        byteArray.push(hexTime.slice(2, 4))
        byteArray.push(hexTime.slice(4, 6))
        byteArray.push(hexTime.slice(6, 8))
    }
    else {
        byteArray.push(hexTime.slice(0, 2))
        byteArray.push(hexTime.slice(2, 4))
        byteArray.push(hexTime.slice(4, 6))
        byteArray.push(hexTime.slice(6, 8))
    }
    return byteArray;

};

console.log(timeToHartTimeByteArray("03:51:39"))

Answer 1

找到问题了，是第一个函数，计算完全错误：

secondsPassedToTime = function (seconds) {
    var hour = seconds * 0.00027778;
    var hh = (~~hour).toString().length < 2 ? "0" + (~~hour).toString() : (~~hour).toString();
    var minutes = (hour - hh) * 60.000;
    var mm = (~~minutes).toString().length < 2 ? "0" + (~~minutes).toString() : (~~minutes).toString();
    var seconds = (minutes - mm) / 0.016667;
    var ss = (~~seconds).toString().length < 2 ? "0" + (~~seconds).toString() : (~~seconds).toString();
    
    return (hh + ":" + mm + ":" + ss)
};
console.log(secondsPassedToTime(13900))

现在有了这个输出，第二个函数转换为正确的十六进制值：

timeToHartTimeByteArray = function (time) {

    var byteArray = new Array();
    var regex = /^[0-9]{2}\:[0-9]{2}\:[0-9]{2}/;
    if (time.match(regex)) {
        time = time;
    }
    else {
        throw "Invalid format for TIME! Format must be: hh:mm:ss";
    }
    var time = time.split(":");
    var hours = parseFloat(time[0]) * 3600;
    var minutes = parseFloat(time[1]) * 60;
    var seconds = parseFloat(time[2]);
    var finalTime = hours + minutes + seconds;

    finalTime = finalTime * 32000;

    var hexTime = finalTime.toString(16)

    if (hexTime.length != 8) {
        var hexTime = "0" + hexTime;
        byteArray.push(hexTime.slice(0, 2))
        byteArray.push(hexTime.slice(2, 4))
        byteArray.push(hexTime.slice(4, 6))
        byteArray.push(hexTime.slice(6, 8))
    }
    else {
        byteArray.push(hexTime.slice(0, 2))
        byteArray.push(hexTime.slice(2, 4))
        byteArray.push(hexTime.slice(4, 6))
        byteArray.push(hexTime.slice(6, 8))
    }
    return byteArray;

};

console.log(timeToHartTimeByteArray("03:51:40"))

时间转换为十六进制（字节数组）和反转

Time conversion to hexadecimal (byte array) and reverse

javascript

arrays

hex