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Save up to 94 bytes of RAM on 20x4 LCD Display machines (#6964)

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* Save up to 94 bytes of RAM on 20x4 LCD Display machines

Moved the custom screen characters out of RAM into Program Memory.  With
SD-Card support and the Progress Bar enabled, this saves 94 bytes of RAM
memory.

This was tested using the example_configurations/FolgerTech-i3-2020
files.  So a couple small changes to those files snuck into this Pull
Request.

Probably...  We can find similar savings in the Graphics LCD code it we
comb through it.   And if so...  That is the place we really need to
save RAM memory!

* Tidy up white space and indentation
This commit is contained in:
Roxy-3D
2017-06-05 17:02:00 -05:00
committed by GitHub
parent 04b07a6ecc
commit 0dd0033b33
4 changed files with 77 additions and 54 deletions
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14
Marlin/Conditionals_LCD.h
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@ -241,14 +241,14 @@
#define LCD_STR_FILAM_MUL "\xa4"
#else
/* Custom characters defined in the first 8 characters of the LCD */
#define LCD_STR_BEDTEMP "\x00" // Print only as a char. This will have 'unexpected' results when used in a string!
#define LCD_STR_DEGREE "\x01"
#define LCD_STR_THERMOMETER "\x02"
#define LCD_STR_UPLEVEL "\x03"
#define LCD_STR_REFRESH "\x04"
#define LCD_BEDTEMP_CHAR 0x00 // Print only as a char. This will have 'unexpected' results when used in a string!
#define LCD_DEGREE_CHAR 0x01
#define LCD_STR_THERMOMETER "\x02" // Too many places use preprocessor string concatination to change this to a char right now.
#define LCD_UPLEVEL_CHAR 0x03
#define LCD_REFRESH_CHAR 0x04
#define LCD_STR_FOLDER "\x05"
#define LCD_STR_FEEDRATE "\x06"
#define LCD_STR_CLOCK "\x07"
#define LCD_FEEDRATE_CHAR 0x06
#define LCD_CLOCK_CHAR 0x07
#define LCD_STR_ARROW_RIGHT ">" /* from the default character set */
#endif