COCleverOS
...
Next Example

Stack Safety Telemetry

Fill task stacks with a known pattern, measure high-water marks, and report margin over serial.

Download Code Back To Examples
Board LPCXpresso51U68 EVB OM40005
Status Planned
Download cleveros_stack_safety_demo.c

Run It

Use these commands from the COS workspace when the board and serial adapter are attached.

make -C firmware/lpc51u68_cleveros_stack_demo clean allmake -C firmware/lpc51u68_cleveros_stack_demo flashpython3 tools/uart_viewer.py --device <serial-device> --baud 9600

What To Look For

  • Stack fill pattern is initialized before scheduling.
  • Telemetry prints once per second.
  • A warning appears when margin drops below the configured threshold.
Download Code From This Website Open Repository 
typedef struct {
    const char *name;
    uint32_t stack_words;
    uint32_t high_water_words;
} stack_report_t;

static void task_stack_report(void)
{
    for (;;) {
        stack_report_t report = rtos_stack_report_current();
        cos_lpc51u68_uart0_puts("stack ");
        cos_lpc51u68_uart0_puts(report.name);
        cos_lpc51u68_uart0_puts(" free ");
        cos_lpc51u68_uart0_put_hex32(report.stack_words - report.high_water_words);
        cos_lpc51u68_uart0_puts("\r\n");
        rtos_delay_ticks(1000u);
    }
}