mirror of
https://github.com/esphome/esphome.git
synced 2026-09-16 17:48:40 +00:00
J. Nick Koston
85d1ab7303
The SDK's built-in ISR / flash / FreeRTOS critical-path code already fills most of the stock 4.5 kB .itcm executable RAM region, leaving under 500 bytes for ESPHome's IRAM_ATTR functions. cb3s overflowed by 248 bytes on first link. Physically .tcm (rw!x, data) and .itcm (rwx, code) are contiguous SRAM blocks on ARM968E-S; the template's boundary is just a linker carve-out. Shift it back 4 kB so .tcm shrinks 60k -> 56k and .itcm grows 4.5k -> 8.5k. Confirmed fits every ESPHome IRAM_ATTR function on cb3s with ample headroom.
