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Forum Index : Microcontroller and PC projects : HELP NEEDED WITH A NEW F4
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OA47 Guru  Joined: 11/04/2012 Location: AustraliaPosts: 986 |
I purchased some STM32F4 black boards and I have found one of the boards will not program via the ST software. I cannot get the unit to register in the cube software like the other units but if I take off the BT0 and BT1 links the screen displays this:  Can anyone offer any ideas? OA47 |
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disco4now Guru Joined: 18/12/2014 Location: AustraliaPosts: 1003 |
Are you reconnecting the power with BT0 and BT1 strapped, I have found just resetting via the RST key can be a bit hit and miss, but a full power off/on always works. Regards Gerry Latest F4 Latest H7 FotS |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 986 |
Definitely using the usb plug to reset the F4 with BT0 & BT1 Strapped. OA47 |
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| disco4now Guru Joined: 18/12/2014 Location: AustraliaPosts: 1003 |
Only other thing I can think of is checking continuity from the BT0 pin to pin 94 on the actual chip itself. Also BT1 to pin 37 on the actual chip. Latest F4 Latest H7 FotS |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 986 |
Was thinking of that and I will check it out. 0A47 |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 4044 |
Does the chip have the right markings for the CPU it's supposed to be? John |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6283 |
Somewhere in the dim past I remember some modules needing non-standard settings for BT0 and BT1. I forget what modules were the ones we were having trouble with but it is worth trying a variety of settings. Jim VK7JH MMedit |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 986 |
@Disco4now I have traced the BT0 and BT1 pins back to the chip via R23 and R33 so no luck there. @JohnS I can confirm that the chip is the same as the others @Jim I grabbed another board of the same build (DevEBox V33) and checked the pin configuration and it is recognized by the Cubeprogrammer. I did reflow the ARM chip and changed the crystal and battery but still the software will not recognize the board. It is strange that there is life when the screen above shows. OA47 |
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| TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6283 |
It does appear to have a program installed. If you can't erase it and load your own, perhaps whoever loaded the original program made it write protected in which case I don't know where to go next. Jim VK7JH MMedit |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 4044 |
I hit something which might be along the same lines and ended up using both Texane stlink & qstlink / qstlink2 (one or other fixed whatever it was). I think the issue was probably corrupted option byte(s). John |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 986 |
John could you elaborate on the software you used? OA47 |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 986 |
Jim, the unit is fresh out of the bag from the supplier. The units that have programmed with MMBasic are still recognised with Cube software. OA47 |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 4044 |
I think it was before OpenOCD had SWD support, or it just couldn't recover from whatever weirdness had occurred, about 9 years ago. You might well just be able to use oocd now. Looks like Texane stlink is now https://github.com/stlink-org/stlink I think the other was https://github.com/fpoussin/QStlink2 John |
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