This is an extension/optimization of PR #2956.
It uses the cached 512B block buffer to avoid heavy-weight read() in SdBaseFile.
Even though this principle allowed the AVR to skip ~600KB of data within ~5 seconds,
the impact on code base is huge, especially into well proven and long-term stable
parts like reading a file from the SD card.
The sole purpose of this PR is to show/verify the possibility of the AVR CPU
in relation to adding thumbnails into MK3 G-codes.
Moreover, this PR shall not be merged unless the missing/commented features
are restored - especially file seeking and M84 search.
PFW-1175
- code_seen("string") -> code_seen_P(PSTR("string")) saved >100B of RAM!
- serial print "." -> '.' saved some code
- extract commonly used string
- SERIAL_PROTOCOLLN("") -> SERIAL_PROTOCOLLN() as no argument is
necessary
Motivation:
- save some RAM joining the autoreport flags into 1 byte
- encapsulate the magic of setting bit masks/features into a class with
a stable public interface
- remove the UI and related stuff to setting a farm number (the
communication protocol must remain intact)
- remove confirmation after print finished ("Print OK")
Both requests are highly welcome, since they allow for lowering the code
size by >1KB
PFW-963, PFW-927
- Changed DETECT_SUPERPINDA to SUPERPINDA_SUPPORT as on miniRAMo the thermistor readings below 30°C
aren't accurate egnough to determine if SUPERPINDA is connected or not
- Add LCD toggle menu Settings -> HW Setup -> SuperPINDA [Yes/No] to overwrite SuperPINDA detection
- If EEPROM_PINDA_TEMP_COMPENSTATION is empty = 0xff then detect SuperPINDA by checking thermistor
- If EEPROM_PINDA_TEMP_COMPENSTAION is 0 then forec enable for temperature compensation menues and functions
- If EEPROM_PINDA_TEMP_COMPENSATION is 1 then force disable for temperature compensation menues and functions
