BOSSA
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shumatech
Overwrite Bootloader
When I try to write a file without setting the offset (in OSX) the bootloader is corrupted and the board does not response any more.
With -o Offset at 0x2000
bossac -o 0X2000 -i -d --port=cu.usbmodem14201 -U -i -e -w -v sketch_sep15a.ino.bin -R Set binary mode version()=v2.0 [Arduino:XYZ] Sep 15 2019 08:29:47 Connected at 921600 baud readWord(addr=0)=0x20001ffc readWord(addr=0xe000ed00)=0x410cc601 readWord(addr=0x41002018)=0x1001031e write(addr=0x20001000,size=0x34) writeWord(addr=0x20001030,value=0x10) writeWord(addr=0x20001020,value=0x20002000) version()=v2.0 [Arduino:XYZ] Sep 15 2019 08:29:47 Device : ATSAMR21x16 Version : v2.0 [Arduino:XYZ] Sep 15 2019 08:29:47 Address : 0x0 Pages : 1024 Page Size : 64 bytes Total Size : 64KB Planes : 1 Lock Regions : 16 Locked : none Security : false BOD : true BOR : true Erase flash chipErase(addr=0x2000)
Done in 0.190 seconds Write 3800 bytes to flash (60 pages) [ ] 0% (0/60 pages)write(addr=0x20001034,size=0xf00) writeBuffer(scr_addr=0x20001034, dst_addr=0x2000, size=0xf00) [==============================] 100% (60/60 pages) Done in 0.023 seconds
Without -o Offset
bossac -i -d --port=cu.usbmodem14201 -U -i -e -w -v sketch_sep15a.ino.bin -R Set binary mode version()=v2.0 [Arduino:XYZ] Sep 15 2019 08:29:47 Connected at 921600 baud readWord(addr=0)=0x20001ffc readWord(addr=0xe000ed00)=0x410cc601 readWord(addr=0x41002018)=0x1001031e write(addr=0x20001000,size=0x34) writeWord(addr=0x20001030,value=0x10) writeWord(addr=0x20001020,value=0x20002000) version()=v2.0 [Arduino:XYZ] Sep 15 2019 08:29:47 readWord(addr=0x41004018)=0 readByte(addr=0x804001)=0xc7 readByte(addr=0x804001)=0xc7 readByte(addr=0x804006)=0xff readByte(addr=0x804007)=0xff Device : ATSAMR21x16 Version : v2.0 [Arduino:XYZ] Sep 15 2019 08:29:47 Address : 0x0 Pages : 1024 Page Size : 64 bytes Total Size : 64KB Planes : 1 Lock Regions : 16 Locked : none Security : false BOD : true BOR : true Erase flash chipErase(addr=0)
Done in 5.002 seconds Write 3800 bytes to flash (60 pages) [ ] 0% (0/60 pages)write(addr=0x20001034,size=0xf00)
SAM-BA operation failed
As you can see the chipErase addr=0
Has anybody else experienced the same problem
If I understand it well you need to use the offset to preserve the bootloader. BTW I am trying to set the offset with the GUI version on OSX. Are you successful with the GUI too?
The issue is not isolated to OSX, I have tried the windows version and it has the same fault. If I set the offset to 0x2000 in windows,OSX and command line, it programs the board correctly.
It seems that the offset default settings were removed at this commit https://github.com/shumatech/BOSSA/commit/dbdd088909c57bdf9aee191720bf6c6159217e22#diff-4bc76381991166f0b7d7a4a0a9116fde This seems to me as a backward step.