Hi,
We are using the NORA-B126-00B module on our custom board, and the first time we flashed it with a simple LED blink example, it worked fine. However, after erasing the flash and flashing the same code again, the program doesn't seem to run — the LED doesn't blink, and it doesn't reach the main() function. The erase and flash process completes without errors, but the program doesn't execute as expected. Can anyone help explain why this is happening and what might be causing the issue?
We observed the same behavior in all boards we have. why is it so?
void arch_cpu_atomic_idle(unsigned int key)
{
#if defined(CONFIG_TRACING)
sys_trace_idle();
#endif
#if CONFIG_ARM_ON_ENTER_CPU_IDLE_PREPARE_HOOK
z_arm_on_enter_cpu_idle_prepare();
#endif
/*
* Lock PRIMASK while sleeping: wfe will still get interrupted by
* incoming interrupts but the CPU will not service them right away.
*/
__disable_irq();
/*
* No need to set SEVONPEND, it's set once in z_arm_cpu_idle_init()
* and never touched again.
*/
#if defined(CONFIG_ARMV6_M_ARMV8_M_BASELINE)
/* No BASEPRI, call wfe directly. (SEVONPEND is set in z_arm_cpu_idle_init()) */
#elif defined(CONFIG_ARMV7_M_ARMV8_M_MAINLINE)
/* unlock BASEPRI so wfe gets interrupted by incoming interrupts */
__set_BASEPRI(0);
__ISB();
#else
#error Unsupported architecture
#endif
SLEEP_IF_ALLOWED(__WFE);
arch_irq_unlock(key);
#if defined(CONFIG_ARMV7_M_ARMV8_M_MAINLINE)
__enable_irq();
#endif
}
