fail to download with multiple files

[nqd]

Things go well with commit e96336f.

When I update to current code, esptool fail to flash multiple files.

With 2 files, esptool goes well

../../tools/esptool/esptool.py --port /dev/ttyUSB0 write_flash -fs 32m-c1 0x00000 ../../esp-sdk/bin/boot_v1.4\(b1\).bin 0x01000 .firmwares/4096_user1.bin
Connecting...
Erasing flash...
Writing at 0x00000800... (100 %)
Erasing flash...
Writing at 0x0003f800... (100 %)

Leaving...

, but with 4 files

../../tools/esptool/esptool.py --port /dev/ttyUSB0 write_flash -fs 32m-c1 0x00000 ../../esp-sdk/bin/boot_v1.4\(b1\).bin 0x01000 .firmwares/4096_user1.bin 0x3FC000 ../../esp-sdk/bin/esp_init_data_default.bin 0x3FE000 ../../esp-sdk/bin/blank.bin
Connecting...
Erasing flash...
Writing at 0x00000800... (100 %)
Erasing flash...
Writing at 0x0003f800... (100 %)
Erasing flash...
Writing at 0x003fc000... (100 %)
Erasing flash...
Traceback (most recent call last):
  File "../../tools/esptool/esptool.py", line 579, in <module>
    esp.flash_begin(blocks*esp.ESP_FLASH_BLOCK, address)
  File "../../tools/esptool/esptool.py", line 214, in flash_begin
    raise Exception('Failed to enter Flash download mode')
Exception: Failed to enter Flash download mode

Do you have any suggestion to overcome this?

Many thanks.

[projectgus]

Hmm, it looks like the fix for the flash erase issue might have caused this regression. It's actually surprising flashing all four images worked with the old revision, most people have encountered the flash erase issue when flashing that much.

Can you please post the sizes (in bytes) of the four files you are flashing? That should make it easy to reproduce the exact problem, by creating dummy binary files.

[nqd]

Sure, this is the 4 files https://www.dropbox.com/sh/8nszizvwose778r/AAD-yMjdXGPnBTh9SblIlXBma?dl=0

Thanks.

[projectgus]

I think this should fix the underlying bug, please let me know if it doesn't.

Turned out it wasn't multiple files, it was that flashing the last file near the end of the flash exposed a bug.

[nqd]

Great thanks. Will check next day when I touch the esp again.

[nqd]

Confirmed. Thanks again!