M172* sys_FM_READ insufficient documentation

obscuresc · ‎2024-09-19

Hi,

I’ve just been using 'sys_FM_READ' from the 'FS_IEC' library (version 1.0.0).

The function seems to read up to the number of characters/bytes specified by the ‘len’ arg or up to the first linefeed character, whichever comes first.

Is this correct?

Are there are any other characters that act like linefeed that reduce the number of characters being read in a call?

Is there a maximum to the 'len' argument?

Thanks.

FedericoM · ‎2025-02-17

Hi,

the function works as you are expecting.

No other chars act like linefeed.

I've never tested it with a number so big, but the limit of LEN should be 32767, so basically it should work with any string you can define.

See Answer In Context

FedericoM · ‎2025-02-17

Hi,

the function works as you are expecting.

No other chars act like linefeed.

I've never tested it with a number so big, but the limit of LEN should be 32767, so basically it should work with any string you can define.

obscuresc · ‎2025-02-17

Thanks @FedericoM. Could the documentation be updated to reflect these details?

FedericoM · ‎2025-02-19

Sorry, I can only track the request