I implemented FatFS in internal memory of MCU STM32 Chan's library. Now I try to emulate bigger volume of flash device to receive large files from PC.
I can do it by changing two places of FatFS image:
1. By changing MBR_start + 12 field value of MBR sector to required amount of sectors to emulate (address 0x1CA, LBA format):
2. By changing total number of sectors in the filesystem in FAT12 boot sector:
But the max number I can put there ix 0x13F (in LBA format) to emulate 142KB flash storage visible for PC. If I try to change that fields to higher I value my USB mass storage emulation fails and PC says me that USB device is not recognized.
Here is link for my FAT12 FS storage binary scan: https://cloud.mail.ru/public/GddY/6rvUuyPHx
Did someone do same things? I can't find any forum of FatFS gurus. Thank you for any suggestion.
