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fix racing issue for SAMD when executing WFI

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This commit is contained in:
hathach 2020-05-25 20:51:02 +07:00
parent 37a7cf9934
commit e79340601f
1 changed files with 7 additions and 1 deletions
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8
ports/atmel-samd/supervisor/port.c
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@ -69,6 +69,7 @@
#include "samd/events.h" #include "samd/events.h"
#include "samd/external_interrupts.h" #include "samd/external_interrupts.h"
#include "samd/dma.h" #include "samd/dma.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "shared-bindings/rtc/__init__.h" #include "shared-bindings/rtc/__init__.h"
#include "reset.h" #include "reset.h"
@ -496,7 +497,12 @@ void port_sleep_until_interrupt(void) {
(void) __get_FPSCR(); (void) __get_FPSCR();
} }
#endif #endif
__WFI(); common_hal_mcu_disable_interrupts();
if (!tud_task_event_ready()) {
__DSB();
__WFI();
}
common_hal_mcu_enable_interrupts();
} }
/** /**