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Fit the nRF54L05/L10 application RAM to the parts, release 0.5.1 - #11

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caveman99 merged 2 commits into
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l05-l10-ram-layout
Oct 26, 2026
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caveman99 merged 2 commits into
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l05-l10-ram-layout

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The nRF54L05 and nRF54L10 linker scripts used the nRF54L15 RAM top: RAM up to 0x2003FF80 and the bootloader NOINIT area at 0x2003FF80. The L05 has 96 KB of RAM and the L10 192 KB, so the initial stack pointer and the NOINIT area were outside RAM, and the bootloader's peer data and double-reset marker were not where the bootloader writes them. Present since 0adb43a; neither part has been tested on hardware.

  • nrf54l05_s145_v10.ld: RAM 0x20004800, length 0x13780; NOINIT at 0x20017F80
  • nrf54l10_s145_v10.ld: RAM 0x20004800, length 0x2B780; NOINIT at 0x2002FF80

Both match nRF54_Bootloader's linker/nrf54l05.ld and linker/nrf54l10.ld (v0.5.0). AGENTS.md and README.md give the per-chip RAM end.

Second commit: changelog and package.json for 0.5.1. After the merge, the squash commit gets the v0.5.1 tag; meshtastic/platform-nordicnrf54#3 then pins it, together with the matching L05/L10 maximum_size / maximum_ram_size.

Both linker scripts used the nRF54L15 RAM top: RAM up to 0x2003FF80 and
the bootloader NOINIT area at 0x2003FF80. The L05 has 96 KB of RAM and the
L10 192 KB, so the initial stack pointer and the NOINIT area were outside
RAM, and the bootloader's peer data and double-reset marker were not where
the bootloader writes them.

RAM now ends at 0x20017F80 (L05) and 0x2002FF80 (L10), with NOINIT there,
as in the bootloader's nrf54l05.ld and nrf54l10.ld.
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Reviewing files that changed from the base of the PR and between e1d73da and d6ac31e.

Files selected for processing: 6
  • AGENTS.md
  • README.md
  • changelog.md
  • cores/nRF5/linker/nrf54l05_s145_v10.ld
  • cores/nRF5/linker/nrf54l10_s145_v10.ld
  • package.json
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@caveman99
caveman99 merged commit e39170d into master Oct 26, 2026
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@caveman99
caveman99 deleted the l05-l10-ram-layout branch October 26, 2026 22:14
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