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Topic: And another NEW issue!! (Read 1506 times)
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WD8BXS
alter Hase
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Posts: 286
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And another NEW issue!!
« on: 22. April 2021, 06:55:59 »
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I have a real issue here!
Brand new board set, turns on, works fine. Came up with the latest bootloader and firmware showing.
Does not see the EEprom, will NOT go into DFU mode. With or without P6 jumpered.
Tried another fresh UI board, same result!
Computer WILL see the radio when it is on though through DFU USB port!
These are fresh kits!
Tried to get ST-link to work, nothing.
Hooked ST-Link to: swdio, swclock, gnd and 3v to pin 27 on header Nothing
Any ideas?
de Chuck WD8BXS
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Thanks,
De WD8BXS vy 73
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SP9BSL
positron
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Re:And another NEW issue!!
« Reply #2 on: 22. April 2021, 09:28:57 »
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Hi,
in both cases (Chuck and Andreas) looks like protection level 2 was enabled. In this state no recovery is possible. We've seen similar behaviour here except that there was protection level 1 activated.
Chuck, before changing the processor try to observe 3.3V power rail with oscilloscope close to processor power pins, maybe that there are some ripples or spikes.
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73 Slawek
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WD8BXS
alter Hase
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Posts: 286
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Re:And another NEW issue!!
« Reply #3 on: 22. April 2021, 12:35:46 »
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I also forgot to note that if will not update the firmware via USB..
I sees the usb and gets as far as saving backup to flash memory
Will try ST-Link later today, if I remember what to do when I get it working, hihi
Should have written that down.
Thanks,
Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:And another NEW issue!!
« Reply #5 on: 22. April 2021, 19:10:01 »
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Yes, I held it for a real long time.
OK I got the ST-Link to connect, now what do I do???
I think I have done it on a OV140 board but not an mchf
Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:And another NEW issue!!
« Reply #6 on: 22. April 2021, 19:32:39 »
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OK, I hooked up ST-LINK
Loaded bootloader and Firmware.
Same result: will not go into DFU, screen says release Band + to go into dfu mode.
When I release, the screen blanks then the radio boots up and goes into button test screen since I still have the power button pushed.
I think I will try erasing the chip again and then use P6 to load and see what happens.
Chuck
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| « Last Edit: 22. April 2021, 19:56:01 by WD8BXS » |
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:And another NEW issue!!
« Reply #7 on: 22. April 2021, 19:55:44 »
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Now ST-Link will not connect !!!
DRAT!!!!
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:And another NEW issue!!
« Reply #8 on: 22. April 2021, 20:14:00 »
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What are the option bytes for the MCHF ?
The chip is STM32F437
Thank,
Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:And another NEW issue!!
« Reply #9 on: 22. April 2021, 22:08:27 »
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I just tried 2 more new UI boards, same result with all 4.
There must be a way to reset the MCU and allow me to start over????
Thanks,
Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:And another NEW issue!!
« Reply #10 on: 23. April 2021, 11:24:18 »
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i suppose I will order 4 mcu's since no one has any ideas!
Thanks ,
Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:And another NEW issue!!
« Reply #12 on: 23. April 2021, 18:34:53 »
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Thanks Andreas,
Yes, I did that.
Take care my friend,
Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:And another NEW issue!!
« Reply #13 on: 24. April 2021, 14:24:28 »
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I just discovered that I am seeing 3v at pin 3 on the DFU USB port.
That should not be there
Chuck
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De WD8BXS vy 73
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WD8BXS
alter Hase
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Re:And another NEW issue!!
« Reply #14 on: 29. April 2021, 19:43:45 »
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Replaced the MCU and all is well.
Hard to believe 4 bad MCU's.
I still think that there must be a way to do a hard reset to the chip so it will be like new.
Chuck, 73
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De WD8BXS vy 73
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Pages: [1] 
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... I never have had changed option bytes (like reset vectors) for F4 - and I do not know if this is possible at all. You can do a complete erase (mass erase) - and I think this will remove all protection bits that are set. But thats all I can tell.
