I was wondering if there exists a function that I can use just like Serial.print(), that constructs a char array of all the bytes, just as they would have been printed to the serial port? That way I could just run the entire thing through the XOR procedure and print to the serial port directly out of the array. Obviously it’s going to be a pain in the ass to calculate the XOR over all the bytes (almost 70 of them), as all output is in ASCII. I know this is not an example of good programming, but until now it seemed to do the trick. If(LongDegrees<100)Īs you can see, the output is constructed of fixed values (’,’ - ‘0’ ,…), chars (NZ - EW which hold the letter N S E or W), integers (LongDegrees) and doubles (dblLat,…).
There seem to be repeated patterns depending on the values which I highlighted in Excel: The colours highlight where there is repeating values. For each corresponding bit in the binary representation of. Much appreciated I have looked further into the left and right nibble of the second byte (the last byte is unchanged at 0x02). The Excel BITXOR function returns a decimal number representing the bitwise XOR of two numbers. Application is developed in MS Excel, is multi-language, supports. I’ve done this plenty of times with a character array, but now I’m constructing the output from a few different sources. The first item on each line is the checksum. Calculation Solitaire is a solitaire card game where the player must place cards in a sequence where each card follows a card that is less the next card by an amount that corresponds to a card adjacent to the. You can see the text of the challenge here. While my solution works, my algorithm works in O(n) time, while the desired solution seems to need to be faster.
If you dont know the checksum, you can omit it. Analyse HEX file line Please enter one line of HEX file to analyze it, to calculate and verify the checksum. The Intel HEX file format is easy to read and to modify except the checksum. I need to calculate the XOR-checksum over all the transmitted bytes and add that as a 2-digit hexadecimal value in the end. As part of a Google Foobar challenge, I'm trying to answer a rather difficult problem that involves the use of the XOR operator to calculate a checksum. For testing and debugging sometimes it is necessary to change some values directly in the HEX file. I’ve written a sketch which outputs a NMEA GPS-phrase every second.
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