Hey Everyone!
I uploaded code one time to my CAN 485 and now I can’t seem to do it again ;/
The code on the board functions correctly and I can even talk to it via the serial monitor
I’m uploading code via FTDI FT232RL with a very similar circuit as https://www.sparkfun.com/products/9716 minus the indicator lights.
When trying to upload the code via the normal USB<–>UART interface I get the following compilation readouts and errors:
avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"
Using Port : COM13
Using Programmer : arduino
Overriding Baud Rate : 115200
AVR Part : AT90CAN128
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PA0
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 8 0 no 4096 8 0 9000 9000 0xff 0xff
flash 65 6 256 0 yes 131072 256 512 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : Arduino
Description : Arduino
Hardware Version: 3
Firmware Version: 6.2
Vtarget : 0.3 V
Varef : 0.3 V
Oscillator : 28.800 kHz
SCK period : 3.3 us
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.00s
avrdude: Device signature = 0x1e9781 (probably c128)
avrdude: reading input file "C:\Users\XXXXXXXXXX\AppData\Local\Temp\arduino_build_477811/XXXXXXXXXX.ino.hex"
avrdude: writing flash (11682 bytes):
Writing | ################################################## | 100% 2.20s
avrdude: 11682 bytes of flash written
avrdude: verifying flash memory against C:\Users\XXXXXXXXXX\AppData\Local\Temp\arduino_build_477811/XXXXXXXXXX.ino.hex:
avrdude: load data flash data from input file C:\Users\XXXXXXXXXX\AppData\Local\Temp\arduino_build_477811/XXXXXXXXXX.ino.hex:
avrdude: input file C:\Users\XXXXXXXXXX\AppData\Local\Temp\arduino_build_477811/XXXXXXXXXX.ino.hex contains 11682 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 2.43s
avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x0000
0x14 != 0x0c
avrdude: verification error; content mismatch
avrdude done. Thank you.
the selected serial port
does not exist or your board is not connected
Reading online it looks like maybe a lock bit was set or something? Not quite sure…so I went to flash a bootloader via an arduino as ISP (with an uno) but oddly enough I just get an error message that it sees a different device signature, this time 0x1e950f as opposed to the “correct” one from earlier of 0x1e9781, so it kicks me out of the bootloader…here are those messages…
avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"
Using Port : COM7
Using Programmer : arduino
Overriding Baud Rate : 115200
An error occurred while uploading the sketch
AVR Part : AT90CAN128
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PA0
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 8 0 no 4096 8 0 9000 9000 0xff 0xff
flash 65 6 256 0 yes 131072 256 512 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : Arduino
Description : Arduino
Hardware Version: 3
Firmware Version: 4.4
Vtarget : 0.3 V
Varef : 0.3 V
Oscillator : 28.800 kHz
SCK period : 3.3 us
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.00s
avrdude: Device signature = 0x1e950f (probably m328p)
avrdude: Expected signature for AT90CAN128 is 1E 97 81
Double check chip, or use -F to override this check.
avrdude done. Thank you.
So I’m at a loss 
What would happen if I would just force the bootloader? Any change of bricking the chip? Any one have an idea?
Thanks for your time!