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Fix sleep function for NRF52. #3108

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Merged
merged 2 commits into from
Oct 26, 2016
Merged

Fix sleep function for NRF52. #3108

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bd1ad99
Fix sleep function for NRF52.
pan- Oct 21, 2016
501a00b
Add define for FPU_EXCEPTION_MASK
pan- Oct 24, 2016
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9 changes: 9 additions & 0 deletions targets/TARGET_NORDIC/TARGET_NRF5/sleep.c
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,8 @@
// In this case, bits which are equal to 0 are the bits reserved in this register
#define SCB_ICSR_RESERVED_BITS_MASK 0x9E43F03F

#define FPU_EXCEPTION_MASK 0x0000009F

void sleep(void)
{
// ensure debug is disconnected if semihost is enabled....
Expand All @@ -31,6 +33,13 @@ void sleep(void)
// the processor from disabled interrupts.
SCB->SCR |= SCB_SCR_SEVONPEND_Msk;

#ifdef NRF52
/* Clear exceptions and PendingIRQ from the FPU unit */
__set_FPSCR(__get_FPSCR() & ~(FPU_EXCEPTION_MASK));
(void) __get_FPSCR();
NVIC_ClearPendingIRQ(FPU_IRQn);
#endif

// If the SoftDevice is enabled, its API must be used to go to sleep.
if (softdevice_handler_isEnabled()) {
sd_power_mode_set(NRF_POWER_MODE_LOWPWR);
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