Did you test the latest bugfix-2.1.x code?

Yes, and the problem still exists.

Bug Description

Sending an M20 or M20 F (with CUSTOM_FIRMWARE_UPLOAD enabled) does not result in *.bin files being listed.

Bug Timeline

Most likely #23878

Expected behavior

*.bin files to be listed when appropriate from M20 and M20 F

Actual behavior

No *.bin files listed.

Steps to Reproduce

1. Put a firmware *.bin file on an SD card.
2. Put sdcard into printer
3. Run M20 F
4. Observe bin file not listed

Version of Marlin Firmware

Bugfix-2.1.x 2022-06-11

Printer model

Ender 3 Pro

Electronics

v4.2.7 board, CR10_STOCKDISPLAY

Add-ons

No response

Bed Leveling

UBL Bilinear mesh

Your Slicer

Other (explain below)

Host Software

OctoPrint

Don't forget to include

• A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

ender3pro.zip

Looking at cardreader.h, fileisBinary and setBinFlag are no-ops unless DO_LIST_BIN_FILES is defined.

  static bool fileIsBinary() { return TERN0(DO_LIST_BIN_FILES, flag.filenameIsBin); }
  static void setBinFlag(const bool bin) { TERN(DO_LIST_BIN_FILES, flag.filenameIsBin = bin, UNUSED(bin)); }

DO_LIST_BIN_FILES is defined in Conditionals_LCD.h:

#if ENABLED(DWIN_LCD_PROUI)
  #define DO_LIST_BIN_FILES 1
#endif

So, fileIsBinary always returns 0. 👎