Can't get it to work?

[silardg]

Hi!

I'm getting error:

INFO:phy Opening /dev/tty.SLAB_USBtoUART at 115200 baud INFO:phy send : [0x0] INFO:phy incorrect echo : [0x0] Traceback (most recent call last): File "pyupdi.py", line 160, in <module> _main() File "pyupdi.py", line 90, in _main device=Device(args.device)) File "/Users/silardgal/Documents/Dev/SENSA/pecka_pcb/Software/pyupdi/updi/nvm.py", line 17, in __init__ self.application = UpdiApplication(comport, baud, device) File "/Users/silardgal/Documents/Dev/SENSA/pecka_pcb/Software/pyupdi/updi/application.py", line 17, in __init__ self.datalink = UpdiDatalink(comport, baud) File "/Users/silardgal/Documents/Dev/SENSA/pecka_pcb/Software/pyupdi/updi/link.py", line 20, in __init__ self.updi_phy = UpdiPhysical(comport, baud) File "/Users/silardgal/Documents/Dev/SENSA/pecka_pcb/Software/pyupdi/updi/physical.py", line 30, in __init__ self.send([constants.UPDI_BREAK]) File "/Users/silardgal/Documents/Dev/SENSA/pecka_pcb/Software/pyupdi/updi/physical.py", line 85, in send raise Exception("Incorrect echo data") Exception: Incorrect echo data INFO:phy Closing /dev/tty.SLAB_USBtoUART

Any idea? I have everything soldered like in the readme.

[silardg]

Progress!!!

I have change it to python3 and used 3K resistor (as for someone it worked on another issue)

python3 pyupdi.py -c /dev/tty.SLAB_USBtoUART -d mega1609 -r -v -b 115200 INFO:phy Opening /dev/tty.SLAB_USBtoUART at 115200 baud INFO:phy send : [0x0] INFO:link STCS to 0x03 INFO:phy send : [0x55, 0xc3, 0x8] INFO:link STCS to 0x02 INFO:phy send : [0x55, 0xc2, 0x80] INFO:link LDCS from 0x00 INFO:phy send : [0x55, 0x80] INFO:phy receive : [] INFO:link UPDI not OK - reinitialisation required INFO:phy Sending double break INFO:phy Opening /dev/tty.SLAB_USBtoUART at 115200 baud INFO:link STCS to 0x03 INFO:phy send : [0x55, 0xc3, 0x8] INFO:link STCS to 0x02 INFO:phy send : [0x55, 0xc2, 0x80] INFO:link LDCS from 0x00 INFO:phy send : [0x55, 0x80] INFO:phy receive : [] INFO:link UPDI not OK - reinitialisation required Traceback (most recent call last): File "pyupdi.py", line 160, in <module> _main() File "pyupdi.py", line 90, in _main device=Device(args.device)) File "/Users/silardgal/Documents/Dev/SENSA/pecka_pcb/Software/pyupdi/updi/nvm.py", line 17, in __init__ self.application = UpdiApplication(comport, baud, device) File "/Users/silardgal/Documents/Dev/SENSA/pecka_pcb/Software/pyupdi/updi/application.py", line 17, in __init__ self.datalink = UpdiDatalink(comport, baud) File "/Users/silardgal/Documents/Dev/SENSA/pecka_pcb/Software/pyupdi/updi/link.py", line 31, in __init__ raise Exception("UPDI initialisation failed") Exception: UPDI initialisation failed INFO:phy Closing /dev/tty.SLAB_USBtoUART

[silardg]

To add things I have tried:

• 3K and 4K7 resistor
• removed pull up on reset
• changed baud

And nothing has worked, I can't get a receive back.

[MAMARR]

Hi, we are using python 2.7.9 and trying to flash Atmesga4809, seeing similar issue, please let us know

C:\Python27>python pyupdi.py -d mega4809 -c COM6 -b 115200 -e -v -f binn.hex INFO:phy Opening COM6 at 115200 baud INFO:phy send : [0x0] INFO:phy incorrect echo : [0x0] Traceback (most recent call last): File "pyupdi.py", line 165, in _main() File "pyupdi.py", line 95, in _main device=Device(args.device)) File "C:\Python27\nvm.py", line 18, in init self.application = UpdiApplication(comport, baud, device) File "C:\Python27\application.py", line 20, in init self.datalink = UpdiDatalink(comport, baud) File "C:\Python27\link.py", line 22, in init self.updi_phy = UpdiPhysical(comport, baud) File "C:\Python27\physical.py", line 30, in init self.send([constants.UPDI_BREAK]) File "C:\Python27\physical.py", line 85, in send raise Exception("Incorrect echo data") Exception: Incorrect echo data INFO:phy Closing COM6

[PitterL]

Looks like the communiction couldn't be build between your UART chip and MCU. You should check whether the UART chip match: parity=serial.PARITY_EVEN ,stopbits=serial.STOPBITS_TWO

[paulbonnett]

I have the same problem, tried it with CP2102 and FT232R bridge on both Linux and Windows 10 and different baud rates. Still the same problem. Using a serial terminal characters are echoed OK. Any ideas?

[mraardvark]

If you are getting an proper echo (round trip) and not a local echo with a terminal, then the problem could still be in a few places... :/

• python3?
• correct serial access rights (linux)?
• recent pyserial?
• sure you have not disabled UPDI (high-voltage required)? I will have to dig out my setup and give it a spin again one day...

[paulbonnett]

Thanks for prompt reply. Checked for local echo by removing resistor, no local echo Python version 2.7.15+ Yes to serial access rights. pyserial 3.4 Tested target with jtag2updi, which worked, so UPDI not disabled

[mraardvark]

Probably not the issue here, but you really should be heading towards py3 :|

[paulbonnett]

Actually it was the issue, tried it with py3 and it worked. Thanks a lot for your help and a great utility

[mraardvark]

Good to hear it :)