Everything, including the Amazon link, is in the instructions. Here¡¯s the link:
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ULINK2 Emulator Original Firmware Support for MDK5.0 Cortex M4 Gold Plating 11 x 5.5cm
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On Mon, Apr 7, 2025 at 11:16 PM, Michael A. Covington wrote:
Can someone share a link to the exact programming device needed?? I went to Amazon just now, and it was far from obvious.
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On 2025-04-07 17:31, Paul Kanevsky wrote:
Hi Folks,
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Ren¨¦, as usual, has been busy with Gemini improvements. The new Bootloader is an update to the original one that was created when 2GB SD cards were all that was available :)
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The new bootloader isn't required if your Gemini is working fine. You can skip it if you don't care about the benefits listed below, or if you feel uncomfortable performing the update.
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The update process itself is about as complicated as the L6 upgrade to the new servo firmware, and requires:
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- A 20 pin ULINK2 emulator/programmer -- about $30 from Amazon
- Keil ULink-2 software (runs on Windows)
- MB_BL_2024.uvproj bootloader project file
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Detailed Instructions can be found here:
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The new bootloader is based on a modern version of Keil middleware and helps with the following:
- Faster boot-up time for Gemini
- Better compatibility with different types and larger size SD cards
- Resolves the issue with the dreaded M:Curr_Gem.bin file for those who have experienced it
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Be careful if you decide to update your Gemini. Follow instructions!
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Regards,
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? ? -Paul
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Michael A. Covington, Ph.D.
Consultant, Covington Innovations, Athens, Georgia, USA
Paul Kanevsky