bitRead and bitWrite documentation ambiguity

[mjbmikeb2]

bitRead says "Reads a bit of a number."
Is that all signed and unsigned numbers of any size?

bitWrite says, "Writes a bit of a numeric variable"
Again, is that all signed and unsigned numbers of any size?

According to this thread
https://forum.arduino.cc/t/bitread-and-bitwrite-for-numbers-bigger-than-a-byte/1160471
bitWrite doesn't work for 64 bit numbers.

I don't know if this is a bug or a feature. Either way can the documentation please be updated to say what datatypes are currently supported.

Thanks.

[karlsoderby]

Hi @mjbmikeb2 , thanks for raising the issue. I looked into it, and made some changes to the documentation that hopefully explains things a bit better:

• Max size to read (64 bits)
• Max size to write (32 bits)
• Added an example of how to actually read each individual bit, and print out the raw binary (hopefully the example itself adds some value on how the bitRead() function works as well.
• float / double are not supported.

Changes here: #933

[mjbmikeb2]

Typo in https://www.arduino.cc/reference/en/language/functions/bits-and-bytes/bitwrite/

"variables up to an unsigned long (32 bits / 8 bytes)."

Should say 4 bytes.

"variables up to an unsigned long (32 bits / 4 bytes)."

[karlsoderby]

Hi there @mjbmikeb2 , thanks for spotting it, just been corrected! #960