Custom xPortInIsrContext() for nRF52/RP2xx0

src/platform/nrf52/architecture.h

@@ -149,3 +149,6 @@
 // No serial ports on this board - ONLY use segger in memory console
 #define USE_SEGGER
 #endif
+
+// Detect if running in ISR context (ARM Cortex-M4)
+#define xPortInIsrContext() ((SCB->ICSR & SCB_ICSR_VECTACTIVE_Msk) == 0 ? pdFALSE : pdTRUE)

src/platform/rp2xx0/architecture.h

@@ -36,3 +36,6 @@
 #elif defined(PRIVATE_HW)
 #define HW_VENDOR meshtastic_HardwareModel_PRIVATE_HW
 #endif
+
+// Detect if running in ISR context (ARM Cortex-M33 / RISC-V)
+#define xPortInIsrContext() (__get_current_exception() == 0 ? pdFALSE : pdTRUE)