| Commit message (Collapse) | Author | Age |
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instead of 16 (with 8 leading 0's).
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I also found out that the noise in the lighhts was coming from the USB
debug interface. For whatever reason it doesn't appear that the spi pins
are not well isolated from the debugger noise so unplugging and running
off one power source works pretty well.
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I finally got a stable red/green pattern to show up on the LED strip.
Unfortunately I had to do this manually because my driver is broken. No
Dma, interrupts or drivers, but manually writing to the spi bus.
Currently the driver assums the data sheet doesn't lie and inflates each
bit 3:1 so a 1 is a 110 pattern and a 0 is a 100 pattern. This should be
well within the tolerances at 2.5Mhz, but alas it's not.
I figured out that it's better to inflate each bit to a 4:1 ratio so a 1
is a 1100 pattern and a 0 is a 1000 pattern. This appears to produce
cleaner results.
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This routine will has a newly allocated stack.
I found out that when using the st-flash utility it likes to reset the
device with the IPSR in HARD FAULT mode (?) so I have to manually hit
the reset button to get it to work.
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MPU in main() to actually work.
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The MPU is a module in arm chips which allow for memory access
protection. They are more primitive than full MMUs, but can still
provide at least basic access control between different process
controls.
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logging is initialized).
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linker script.
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Removed old iterations of the project and moved the files from 02-usart
to the root directory since that's the sole place where the action is
and that subproject has outgrown its initial title.
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