Flashing fails with this compiled version while 1.7 is doing fine.

[pjalocha]

No description provided.

[pjalocha]

1.7 supplied with Arduino 1.8.9 works just fine, but when I compile and run this version here it fails as below.

The command given is like this:

bossac --port=ttyACM0 -i -U -e -w -R -v .bin

and the relevant part of the reply:

Done in 0.740 seconds
Write 49716 bytes to flash (777 pages)
[==============================] 100% (777/777 pages)
Done in 0.255 seconds
Verify 49716 bytes of flash
[==============================] 100% (777/777 pages)
Verify failed
Page errors: 128
Byte errors: 7956

[RatGit]

I have the same issue I think...

I've compiled versions 1.7.0, 1.8 and 1.9.1 on a Raspberry Pi 3B+ which I use to program a SparkFun SAMD21 Mini Breakout board, (ie. an Arduino Zero clone).

Both 1.8 and 1.9.1 fail in the same way, (see below), whereas 1.7.0 works? One thing I've noticed is that 1.7.0 successfully detects the USB port and connects at the higher speed, (Connected at 921600 baud), whereas the later versions don't:

sudo bossac -i -d --port=ttyACM0 --usb-port=true -e -w -v -R '/home/programmer/Sampler_Controller.bin'
Send auto-baud
Set binary mode
version()=v2.0 [Arduino:XYZ] Dec 20 2016 15:36:39
Connected at 115200 baud
readWord(addr=0)=0x20007ffc
readWord(addr=0xe000ed00)=0x410cc601
readWord(addr=0x41002018)=0x10010305
write(addr=0x20004000,size=0x34)

SAM-BA operation failed

I also find that I have to run the following command beforehand to ensure that bossac will work. (The SAMD21 board also occasionally needs to be unplugged and re-inserted).

sudo stty -F /dev/ttyACM0 speed 1200 cs8 -cstopb -parenb

If I don't do this I get the following error:

Set binary mode
Send auto-baud
Set binary mode
No device found on ttyACM0

[galak]

Did some bisecting and got this commit causing issues:

commit ee5a651 (refs/bisect/bad)
Author: Scott Shumate [email protected]
Date: Sun May 21 09:58:01 2017 -0500

Refactored to encapsulate all device-specific knowledge into the Device
class including flash creation to prevent Samba from being a dumping
ground for miscellaneous device features.

[cmaglie]

@RatGit
the semantic of -U parameter has been changed from 1.7.
You may want to try to replace --usb-port=true or -U true to just -U

[cmaglie]

@pjalocha @RatGit
try also to add -o 0x2000 to the command line (I suppose you're running a SAMD21 based board), previously the offset to skip the bootloader size was built-in in bossac, now you must specify it via command line.

[nzmichaelh]

@RatGit re: the board needing to be unplugged and then plugged back in, I see the same due to a race between the 'stty' call, the board detaching, and Bossa attaching. If the board hasn't finished restarting then Linux puts the board on ttyACM1 instead of ttyACM0

[rzr]

I confirm zephyr's version is working fine on arduino_nano_33_ble

I can provide some traces if it helps

/usr/local/bin/bossac-1.9.1-14-g3532de8  --version # KO
Basic Open Source SAM-BA Application (BOSSA) Version 1.9.1-14-g3532de8

/usr/local/bin/bossac-1.9.1-17-g89f3556 --version # OK
Basic Open Source SAM-BA Application (BOSSA) Version 1.9.1-17-g89f3556

Relate-to: https://gitlab.eclipse.org/eclipse/oniro-core/docs/-/issues/141#notes