Per https://github.com/gnea/grbl-Mega/issues/158 The logical OR squashes the previous checksum down to 1 bit of information, resulting in the final checksum being either the last character written, or one plus the last character written.
This change switches to the bitwise-or to convert the squashing into a 1-bit roll to the left.
评论 (2)
#2 – fra589 于 2022-04-11
Very old subject… Already discussed in 2017 here :
https://github.com/grbl/grbl/issues/1249#issuecomment-569354273
with the choice not to correct it
@++;
Gauthier.
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#1 – drf5n 于 2022-04-11
This would be consistent with grblHAL’s
https://github.com/grblHAL/core/blob/3a84b58d301f04279268b4ef1045fd6bc0961be5/nuts_bolts.c#L267-L278