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pozyxLabs / Pozyx-Arduino-library

The Arduino library for use with the pozyx accurate indoor positioning system.
https://www.pozyx.io
MIT License
78 stars 53 forks source link

POZYX_ERROR_UNRECDEV #74

Open ivannunyadambiz opened 6 years ago

ivannunyadambiz commented 6 years ago

the STM32 is trying to communicate with the DW1000, LEDs 1-4 are active, LEDs 1 and 4 go off for ~125us maybe once per second (seems to happen while the STM32 tries to communicate). There is activity on all the SPI signals, supply voltages seem ok. I tried reflashing FW v1.3, which did not help. With v1.1 i don't even get a VCP upon USB connection. this is a v1.3 anchor.

bdz69 commented 6 years ago

I had the same problem. I was unable to revert to an earlier firmware version with the same symptoms you describe. I wrote to support@pozyx.io and the sent me a special version of the 1.1 firmware that would reset the board. I used my st-link v2 programmer and completely wiped the chip with a full erase. Afterwords I had to use an Arduino Uno and use the pozyx-change-network-id sketch to give the board an id; It was reset to 0x0000. After that I was able to reprogram the chip normally with the proper UWB settings.

ivannunyadambiz commented 6 years ago

i assume you wiped it using the st-link because dfuse flashing 1.1 followed by 1.3 did not improve things? or v1.1 simply didn't flash at all?

bdz69 commented 6 years ago

Yes St-Link V2 JTAG programmer. I tried it first with the standard firmware 1.1 and that wouldn’t work. Symptoms were exactly as you described. Laurent sent me a knew firmware 1.1 that was made specially to fix the registers that were changed with the 1.3 version. The tags I flashed with the new 1.1 version after complete erase with the ST-Link and the tags worked immediately with all the LEDs flashing like they used to when communicating.

ivannunyadambiz commented 6 years ago

thanks for replacing the damaged equipment!

however, after spending ~5h trying to get basically anything to work using the windows gui, i repacked all of it and shelved it.

nothing works as stated, i get all kinds of unrelated and 'unexpected' errors, and i think 'settings don't get written to all the devices in range' with range >= 3m just kinda prevents much success anyway.