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Implement MCU reset correctly #107

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urish opened this issue Sep 10, 2021 · 0 comments
Open

Implement MCU reset correctly #107

urish opened this issue Sep 10, 2021 · 0 comments
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enhancement New feature or request open for vote Vote at https://wokwi.com/features

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@urish
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urish commented Sep 10, 2021

Datasheet says:

During reset, all I/O registers are set to their initial values, and the program starts execution from the reset vector
so there are a couple of changes to get the reset done properly:

This means we need to:

  1. Zero out just the I/O registers, not all the SRAM
  2. Make sure all the peripherals are reset (the peripherals can set the reset value of their I/O registers for those who aren't zero)
@urish urish added enhancement New feature or request good first issue Good for newcomers open for vote Vote at https://wokwi.com/features and removed good first issue Good for newcomers labels Sep 10, 2021
@sutaburosu sutaburosu mentioned this issue Jan 22, 2022
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urish added a commit that referenced this issue Apr 29, 2022
@urish
fix(cpu): don't clear RAM on reset #107
ec735c7 
wokwi/wokwi-features#282
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