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DRAM SDRAM #2551

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rusefillc opened this issue Apr 15, 2021 · 8 comments
Closed

DRAM SDRAM #2551

rusefillc opened this issue Apr 15, 2021 · 8 comments
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ram_shortage

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@rusefillc
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Sweet RAM...
there are definitely legit use-cases for RAM
@rusefillc
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https://docs.rs-online.com/b72f/0900766b815247be.pdf tells us that Discovery kit with STM32F429ZI MCU has used IS42S16400J chip

https://jlcpcb.com/parts/componentSearch?searchTxt=sdram

image

@rusefillc
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See also andreika-git/hellen-one#29

@rusefillc
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That's community see SDRAMConfig

rusefillc added a commit that referenced this issue Jun 27, 2021
@rusefillc
DRAM SDRAM #2551
3db0933
rusefillc added a commit that referenced this issue Jun 27, 2021
@rusefillc
DRAM SDRAM #2551
6819ce9
rusefillc added a commit that referenced this issue Jun 27, 2021
@rusefillc
DRAM SDRAM #2551
b3579aa
rusefillc added a commit that referenced this issue Jun 27, 2021
@rusefillc
DRAM SDRAM #2551
1cd0440
rusefillc added a commit that referenced this issue Jun 27, 2021
@rusefillc
DRAM SDRAM #2551
f32c3f6
@rusefillc
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I have pushed some not-yet-working code a while back and no time/brain to look into this further.

Just FYU @racer-coder STM32F429I-DISC1 is in stock at digikey and it has SDRAM on board, same board @mck1117 has.

@rusefillc
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@dron0gus did you say you also have STM32F429I-DISC1? maybe one day we will get DRAM/SDRAM :)

@racer-coder
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Why do we need more RAM? It won't help older hardware, the F429 has 256k, some F7 have 512, and H743 has 1M. Now that it's looking like even the 192k is plenty, what's the driver for this?

Downside - more variants to program, more boardspace, more complexity.

@rusefillc
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No specific use-case, very long term plan.

But I can think of build-in bare bones oscilloscope and buffer transfer, crazy Lua, whatever self-tuning stuff with https://github.com/dpilger26/NumCpp and all other kinds of crackpipe dreams.

rusefillc pushed a commit that referenced this issue Jan 5, 2022
DRAM SDRAM #2551
4cd4a8c
@rusefillc
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Thank you @dron0gus !

https://rusefi.com/forum/viewtopic.php?p=43998#p43998

rusefillc pushed a commit that referenced this issue Jan 11, 2022
https://github.com/rusefi/rusefi/issues/2551
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@racer-coder @rusefillc