arch/xtensa/esp32: Show CPU activity on IDLE task and on interrupts.

Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>

arch/xtensa/src/esp32/esp32_idle.c

@@ -22,13 +22,17 @@
  * Included Files
  ****************************************************************************/
 
+#include <nuttx/config.h>
+
 #include <assert.h>
 #include <stdint.h>
 #include <debug.h>
-#include <nuttx/config.h>
+
+#include <nuttx/board.h>
 #include <nuttx/arch.h>
 #include <nuttx/spinlock.h>
 #include <nuttx/power/pm.h>
+#include <arch/board/board.h>
 
 #include "esp32_pm.h"
 #include "xtensa.h"
@@ -45,6 +49,18 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+/* Does the board support an IDLE LED to indicate that the board is in the
+ * IDLE state?
+ */
+
+#ifdef CONFIG_ARCH_LEDS_CPU_ACTIVITY
+#  define BEGIN_IDLE() board_autoled_off(LED_CPU)
+#  define END_IDLE()
+#else
+#  define BEGIN_IDLE()
+#  define END_IDLE()
+#endif
+
 /* Values for the RTC Alarm to wake up from the PM_STANDBY mode
  * (which corresponds to ESP32 stop mode).  If this alarm expires,
  * the logic in this file will wakeup from PM_STANDBY mode and
@@ -266,9 +282,11 @@ void up_idle(void)
    * sleep in a reduced power mode until an interrupt occurs to save power
    */
 
+  BEGIN_IDLE();
 #if XCHAL_HAVE_INTERRUPTS
   __asm__ __volatile__ ("waiti 0");
 #endif
+  END_IDLE();
 
   /* Perform IDLE mode power management */
 

arch/xtensa/src/esp32/esp32_irq.c

@@ -32,7 +32,9 @@
 
 #include <nuttx/irq.h>
 #include <nuttx/arch.h>
+#include <nuttx/board.h>
 #include <arch/irq.h>
+#include <arch/board/board.h>
 
 #include "xtensa.h"
 
@@ -924,6 +926,10 @@ uint32_t *xtensa_int_decode(uint32_t cpuints, uint32_t *regs)
   int cpu;
 #endif
 
+#ifdef CONFIG_ARCH_LEDS_CPU_ACTIVITY
+  board_autoled_on(LED_CPU);
+#endif
+
 #ifdef CONFIG_SMP
   /* Select PRO or APP CPU interrupt mapping table */