XGO library

[Wenjie Wu]

I'm trying to build a library for XGO(https://www.elecfreaks.com/learn-en/microbitKit/microbit-xgo-robot-kit/1.microbit-xgo-robot-kit-Introduction.html)

But I encounter a problem:

https://github.com/elecfreaks/pxt-xgo/blob/master/main.ts#L231

move_buffer[6] = ~(0x09 + 0x00 + 0x31 + move_buffer[5]) when I translate the code directly in microblocks, move_buffer[6] will be treated a negative number in MicroBlocks , after that it cannot be written as a byte

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[Dariusz Dorożalski]

It seems to be a kind of checksum from move_buffer[2 .. 5] clamped to a byte.

You may try simplified move_buffer[6] = ~( ( 0x3A + move_buffer[5] ) mod 256)

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[Wenjie Wu]

Thanks for the tip, here's my solution, it works for me

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