write-bin does not flash binary

[TheOnAndOnlyZenomat]

Hey,
I have a binary

00000000: 01a0                                     ..

which is just a jump to 0x0.

When I try to write this binary with

espflash write-bin 0 img.img

nothing gets actually written. The output looks normal

[2024-04-07T17:54:34Z INFO ] Serial port: '/dev/ttyUSB0'
[2024-04-07T17:54:34Z INFO ] Connecting...
[2024-04-07T17:54:34Z INFO ] Using flash stub
Chip type:         esp32c3 (revision v0.3)
Crystal frequency: 40 MHz
Flash size:        4MB
Features:          WiFi, BLE
MAC address:       60:55:f9:c8:a7:6c
[00:00:00] [========================================]       1/1       0x10000                                                                        
[2024-04-07T17:54:36Z INFO ] Binary successfully written to flash!

but when reading the memory back using

espflash read-flash 0 64 out.bin

it is just all 0xff.

When I try to flash the same binary with esptool.py

esptool.py write_flash 0 img.img

it works.
I can read back the memory with espflash and esptool.py and both show 01a0 at 0x0 in the flash.

Am I missing the point of the subcommand, or is this actually a bug. If the latter is the case, I'd be happy to do some debugging and testing for you.

[MabezDev]

Hmm, looks like a bug. It's ignoring your input address of 0x0 and proceeding with the default application address of 0x10000.

[jordonsc]

I don't believe it's writing to the wrong location, if I have good data in the provided address, after using espflash write-bin that data is replaced by 0xFF bytes as if it was erased.

The success of write-bin is dependent on my payload. If I change the payload slightly, it might succeed. Change again, it might fail - but it is deterministic.