Reenable nrf erratum for FPU high power usage in sleep

obra · obra · commit 56ba3b1873ef · 2025-04-20T15:16:27.000-07:00
diff --git a/cores/nRF5/wiring.c b/cores/nRF5/wiring.c
@@ -113,7 +113,8 @@ void enterOTADfu(void)
 
 void waitForEvent(void)
 {
-#if 0
+// NRF52840 erratum: 3.7 [87] CPU: Unexpected wake from System ON Idle when using FPU
+#if (__FPU_USED == 1)
   // Set bit 7 and bits 4..0 in the mask to one (0x ...00 1001 1111)
   enum { FPU_EXCEPTION_MASK = 0x0000009F };
 

Original file line number	Diff line number	Diff line change
`@@ -113,7 +113,8 @@ void enterOTADfu(void)`
`113`	`113`
`114`	`114`	`void waitForEvent(void)`
`115`	`115`	`{`
`116`		`-#if 0`
	`116`	`+// NRF52840 erratum: 3.7 [87] CPU: Unexpected wake from System ON Idle when using FPU`
	`117`	`+#if (__FPU_USED == 1)`
`117`	`118`	`// Set bit 7 and bits 4..0 in the mask to one (0x ...00 1001 1111)`
`118`	`119`	`enum { FPU_EXCEPTION_MASK = 0x0000009F };`
`119`	`120`