FreeRTOS Smart Car: C8T6 Resource Pressure
Examines Flash, RAM, task stacks and persistence boundaries in a multi-task smart-car firmware.
Project: STM32F103 FreeRTOS Multi-Mode Smart Car
Symptom: Tasks, controls and diagnostics left little room in 64 KB Flash and 20 KB RAM.
Hypothesis: Task stacks, dynamic structures, the OLED buffer and persistent parameters could be consuming too many resources together.
Investigation: Built C8T6 and RCT6 targets, inspected size and linker output, ran host PID and protocol tests, and checked the reserved final 1 KB Flash page.
Root cause: The complete task, display, diagnostic and parameter set approached the MCU limits.
Fix: Used fixed arrays, removed a full OLED framebuffer, reduced task resources and reserved the final 1 KB page.
Lesson: Embedded acceptance must cover Flash, RAM, task stacks and persistence boundaries. Firmware and host tests pass; vehicle power, calibration and endurance are pending.