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Topic: CPU hot and no connection to PC (Read 8211 times)
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IK5WWP
Neuling
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Posts: 25
Ich liebe dieses Forum!
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Re:CPU hot and no connection to PC
« Reply #30 on: 03. March 2018, 15:50:56 »
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Attempted to upload bootloader and firmware almost 10 times: DfuSe ok, but the display is still white.
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peter_77
Urgestein
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Posts: 735
THE mcHF and UHSDR forum !
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Re:CPU hot and no connection to PC
« Reply #32 on: 03. March 2018, 17:53:54 »
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| Attempted to upload bootloader and firmware almost 10 times: DfuSe ok, but the display is still white. |
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I had the same effect like DF5LI once.
For me the solution was the same. After loading both .dfu files (bootloader and firmware) with dFuse i flashed again only the bootloader a second time.
After that the board came up without any error.
If you have done all this, the only solution is to check all LCD connections from MCU to the LCD sockets with an ohm meter as Andreas wrote.
In case all that does not help you then need to check the LCD on a running board where an LCD runs fine.
Or...send it back to Andreas for a check 
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| « Last Edit: 03. March 2018, 17:55:05 by peter_77 » |
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IK5WWP
Neuling
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Posts: 25
Ich liebe dieses Forum!
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Re:CPU hot and no connection to PC
« Reply #33 on: 03. March 2018, 21:06:07 »
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OK - I was outside the house so you was "too fast"  The display you got was TESTED and WORKING FINE. I do not know what is the state after disassembling - hopefully the same...
White screen but LEDs are acting normal at firmware start is due to bas connections between MCU and LCD header.
vy 73
Andreas
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White screen and ABNORMAL acting of the leds: when connected with the pc, red and green leds are on during upload. Then I remove the jumper on p6, I remove the usb cable, I give +5V on pin 28 and no one led is on...
P.s: connections between LCD and MCU all checked ok
P.p.s: Now I'll go out to smoke a Toscano cigar, otherways I'll keep a big hammer to resolve the problems of the board definitely 
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DF5LI
alter Hase
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Posts: 371
Ich liebe meinen SParrow !
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Re:CPU hot and no connection to PC
« Reply #34 on: 04. March 2018, 03:17:16 »
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Hmm, smoking a cigar will help you to calm down... But what the hell may be the problem?
A dumb question: it's an I40-ui-board? Do you use the right BL and FW? The fw-40SDR.dfu and the bl-40SDR.dfu ? It's my last hope, but before you use the hammer...
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73, Harri
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DG2NPE
noch länger dabei
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Posts: 132
Ich liebe dieses Forum!
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Re:CPU hot and no connection to PC
« Reply #36 on: 04. March 2018, 11:53:27 »
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Hi all,
My problem was similar. I solved it taking an other computer (and an other usb stick). Downloaded bootloader + and firmware new, started dfu-tool, flashed bl--ovi40.dfu and than fw-ovi40.dfu.
Now it works! Problem, maybe, was the download with the wrong computer?
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IK5WWP
Neuling
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Posts: 25
Ich liebe dieses Forum!
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Re:CPU hot and no connection to PC
« Reply #37 on: 04. March 2018, 12:24:49 »
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If no LED is coming up at startup with loaded bootloader and firmware I am nearly sure firmware is NOT loaded correctly (or you leave P6 set when testing).
Easiest wy to apply bootloader and firmware for the first time (!!!!):
1) Set P6 and flash bl-ovi40.dfu, after this (without touching anything else) load fw-ovi40.dfu to defuse-tool and flash it
2) remove power supply
3) remove P6
4) apply power supply and everything works
vy 73
Andreas
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Dowloaded again bootloader and firmware, followed step by step the above list of action (the same as yesterday) and no led come on at power up, only the white screen on lcd. Tested even with lcd removed: no led come on.
As DF5LI said: "what the hell may be the problem?"
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IK5WWP
Neuling
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Posts: 25
Ich liebe dieses Forum!
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Re:CPU hot and no connection to PC
« Reply #38 on: 04. March 2018, 12:27:30 »
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Hi all,
My problem was similar. I solved it taking an other computer (and an other usb stick). Downloaded bootloader + and firmware new, started dfu-tool, flashed bl--ovi40.dfu and than fw-ovi40.dfu.
Now it works! Problem, maybe, was the download with the wrong computer?
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The computer I use is working well with a MCHF, but I'll try with anoter pc for sure.
Thank you for your suggestion and thank to all who try to help me!
Lorenzo IK5WWP
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DG2NPE
noch länger dabei
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Posts: 132
Ich liebe dieses Forum!
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Re:CPU hot and no connection to PC
« Reply #39 on: 04. March 2018, 13:33:29 »
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This problem ocurred only with ovi40 Firmware - not with a Mchf!
73 Peter, DG2NPE
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IK5WWP
Neuling
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Posts: 25
Ich liebe dieses Forum!
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Re:CPU hot and no connection to PC
« Reply #40 on: 04. March 2018, 14:56:16 »
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Repeated the entire procedure with another pc, but the reselt is the same.
The pc and the the windows device manager see immediately the STM device in DFU Mode connected on the USB controller.
The software upload the bootloader and the firmware succesfully, but, after removed jumper on P6 and usb cable and given power supply, nothing happen: the screen is white and all leds are off.
UPDATE!! ONLY A TIME, I REPEAT, ONLY A TIME I'VE SEEN THE DARK SCREEN WITH THE MESSAGE OVI40 AND THE VERSION OF THE FIRMWARE. GREEN AND RED LEDS ON, STUCK ON THAT STATUS.
Then removed and regiven power and again the white screen...
Sorry for the uppercase...
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IK5WWP
Neuling
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Posts: 25
Ich liebe dieses Forum!
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Re:CPU hot and no connection to PC
« Reply #42 on: 04. March 2018, 15:41:27 »
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It's alive!!
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IK5WWP
Neuling
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Posts: 25
Ich liebe dieses Forum!
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Re:CPU hot and no connection to PC
« Reply #43 on: 04. March 2018, 15:43:31 »
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Not very reliable, but alive. I believe same soldering of MCU pins not good. I'll take a better look after...
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 DSC_081001.jpg
« Last Edit: 04. March 2018, 15:44:06 by IK5WWP » |
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Co
schon länger dabei
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Posts: 79
Ich liebe dieses Forum!
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Re:CPU hot and no connection to PC
« Reply #44 on: 04. March 2018, 15:46:36 »
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I have (had?) a similar problem on my older V1.7 board. Sometimes white screen or flimmering of the backlight. I have not fully located the problem. However slightly re-adjusting the LCD in the header solves the problem until it reappears then again readjusting the LCD will solve it. In my case when it appears I can still dim the backlight.
So when it happens, power down, readjust LCD carefully, power up , keep fingers crossed.
It is typically a bad contact most probably in the header or a contact under the header. I am still investigating but so far unsuccessful.
regards
Co
Co
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