Task Timing Analysis & Visualization

// Generate task timing chart from ETM trace

// Prerequisites: ETM trace captured (see hardware-trace-etm-mcds)

// Task timing chart: shows task activation, run, preemption, completion
Trace.Chart.TASK            // timeline: each task = a row; colour = state

// Zoom to a specific time window showing a 10ms task overrun
Trace.Chart.TASK /ZOOM 49.5ms 52.5ms    // 3ms window around suspected overrun

// Measure a specific task's execution time between trace markers
// Use TRACE32 'Trace.Find' to locate task entry/exit points

// Export timing data for AUTOSAR timing analysis tools (SymTA/S, Timing Designer)
// TRACE32 can export in AUTOSAR TIMEX format for tool import
Trace.SAVE.TASK timing_export.timex

// Oscilloscope-style view: trigger waveforms
// Show ISR arrivals + task activations on a time axis
Trace.Chart.Signal /VCD timing_signals.vcd   // export VCD for GTKWave

// Statistical timing analysis across 1000 task activations:
LOCAL &i &max_us
&max_us=0.
// Iterate Trace.Find results counting execution durations
Trace.Statistics.TASK "OsTask_10ms"   // min/avg/max execution time

/* Runtime timing violation monitoring using AUTOSAR OS ProtectionHook */
#include "Os.h"
#include "Dem.h"
#include 

/* Timing budget per task in STM ticks (300 ticks = 1µs) */
#define TASK_10MS_BUDGET_TICKS  (9500u * 300u)  /* 9.5ms budget; 0.5ms margin */

static uint32_t g_task10ms_start;

void Os_PreTaskHook(void) {
    if (GetTaskID() == OsTask_10ms_id) {
        g_task10ms_start = (uint32_t)MODULE_STM0.TIM0.U;
    }
}

void Os_PostTaskHook(void) {
    if (GetTaskID() == OsTask_10ms_id) {
        uint32_t elapsed = (uint32_t)MODULE_STM0.TIM0.U - g_task10ms_start;
        if (elapsed > TASK_10MS_BUDGET_TICKS) {
            /* Report timing violation as DEM event */
            Dem_ReportErrorStatus(DEM_EVENT_TASK_10MS_TIMING_VIOLATION,
                                  DEM_EVENT_STATUS_FAILED);
            /* Log worst-case for post-investigation */
            if (elapsed > g_task10ms_wcet_observed) {
                g_task10ms_wcet_observed = elapsed;
            }
        }
    }
}