| ATIoNo | Posted: 15 Jan 2025, 03:43 AM |
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 Member Posts: 4 Joined: 30-June 20 |
My second favorite project after the precision clock. Would've loved to have gotten my hands on one, but I came in 11 hours too late it seemed. I believe the video presentation was also one of your longer ones, though half as long as the UV pendant video. Lovely job on all parts of the project, as usual. I dug through git.mitxela and github, but found no project files. Is this project something you'll consider sharing? Am I badgering you before you've gotten a chance to publish? Either way, I would absolutely love to give producing one of these a go, hope it's not too near and dear to your heart. Lovely confluence of all you like to do. Regards. ------------- |
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| Dunkle | Posted: 15 Jan 2025, 05:15 PM |
 Member Posts: 1 Joined: 15-January 25 |
I also want to know its specific details. I plan to use STM32, MPU6050, and 16 * 16 WS2812 for production ------------- |
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| SapereAude1490 | Posted: 16 Jan 2025, 11:07 AM |
 Member Posts: 3 Joined: 16-January 25 |
From the blog post: "These demos, along with the source code to the pendant itself, are not yet released to the public, but I plan to do that at some point in future. I figured that at least for a short while, given that I've put some of the pendants up for sale, there should be some mystery behind their exact operation, but all will be revealed in time." ------------- |
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| Tonyp56 | Posted: 17 Jan 2025, 08:58 PM |
 Member Posts: 1 Joined: 17-January 25 |
How much to purchase the pendant from you? ------------- |
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| Slashasher | Posted: 11 Apr 2025, 04:52 AM |
 Member Posts: 1 Joined: 11-April 25 |
Any update on if or when the files for this project will be shared? I plan on taking the original design and morphing it to a credit card sized format. ------------- |
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| mit | Posted: 14 Apr 2025, 08:36 PM |
 yeah whatever Admin Posts: 596 Joined: 4-May 16 |
QUOTE (Slashasher)
Probably at least a few months sorry.Any update on if or when the files for this project will be shared? I plan on taking the original design and morphing it to a credit card sized format. ------------- |
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| Lestat | Posted: 29 Apr 2025, 11:02 AM |
 Member Posts: 1 Joined: 21-January 25 |
here and waiting lol i just need to know the cap / res and mayve the code for the chip but i have a pcb ready to go i think ------------- |
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| MrFastfinger | Posted: 30 Apr 2025, 11:49 AM |
 Member Posts: 2 Joined: 30-April 25 |
I really liked your project and decided to create something similar for my engineering thesis. As far as I understand, it's not possible to update GPIO pins using DMA on the STM32L4xx series. It works on my STM32F103, but not on my STM32L467RG. How did you manage to make it work? I implemented the display using two 4-bit decoders instead of using Charlieplexing. This way, I don’t have to deal with tri-state outputs — I just need to update the GPIOA register. ------------- |
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| mit | Posted: 1 May 2025, 10:27 AM |
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yeah whatever Admin Posts: 596 Joined: 4-May 16 |
QUOTE (MrFastfinger)
DMA to GPIO is definitely possible on both L476 and L432. The setup is probably different to the F103 though as they have a different number of streams/channels, I can't remember the details. It's also different again on the newer generation of chips with their GPDMA.I really liked your project and decided to create something similar for my engineering thesis. ------------- |
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| MrFastfinger | Posted: 2 May 2025, 10:31 AM |
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Member Posts: 2 Joined: 30-April 25 |
QUOTE (mit)
I've been trying to get it to work since your reply. I found out it might be possible using DMA to write to GPIO->BSRR, but I couldn't get it working. I think I still need more experience to pull this off. In the meantime, I optimized my simulation parameters, and now it runs decently on my F103. (I also overclocked it to 128MHz...) Last edit by MrFastfinger at 2 May 2025, 10:33 AM ------------- |
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