Update ESP-IDF examples

examples/espidf-ulp-pulse/ulp/pulse_cnt.S

@@ -144,14 +144,3 @@ edge_detected:
 	jump wake_up, eq
 	/* Not yet. End program */
 	halt
-
-	.global wake_up
-wake_up:
-	/* Check if the system can be woken up */
-	READ_RTC_FIELD(RTC_CNTL_LOW_POWER_ST_REG, RTC_CNTL_RDY_FOR_WAKEUP)
-	and r0, r0, 1
-	jump wake_up, eq
-
-	/* Wake up the SoC, end program */
-	wake
-	halt

examples/espidf-ulp-pulse/ulp/wake_up.S

@@ -0,0 +1,16 @@
+/* ULP assembly files are passed through C preprocessor first, so include directives
+   and C macros may be used in these files 
+ */
+#include "soc/rtc_cntl_reg.h"
+#include "soc/soc_ulp.h"
+
+	.global wake_up
+wake_up:
+	/* Check if the system can be woken up */
+	READ_RTC_FIELD(RTC_CNTL_LOW_POWER_ST_REG, RTC_CNTL_RDY_FOR_WAKEUP)
+	and r0, r0, 1
+	jump wake_up, eq
+
+	/* Wake up the SoC, end program */
+	wake
+	halt