Merge pull request #2929 from bapclenet/samr21/rtc_isr

samd21/rtc_safety_isr
8 years ago · bfaa4ea1e3
parent ffbd4f6bd2 fa571013ee
commit bfaa4ea1e3
1 changed files with 1 additions and 1 deletions
--- a/cpu/samd21/periph/rtc.c
+++ b/cpu/samd21/periph/rtc.c
@ -186,7 +186,7 @@ void isr_rtc(void)
 {
    RtcMode2 *rtcMode2 = &(RTC_DEV);
    uint16_t status = rtcMode2->INTFLAG.reg;
-    if (status & RTC_MODE2_INTFLAG_ALARM0) {
+    if ((status & RTC_MODE2_INTFLAG_ALARM0) && (rtc_callback.cb != NULL)) {
        rtc_callback.cb(rtc_callback.arg);
        rtcMode2->INTFLAG.reg = RTC_MODE2_INTFLAG_ALARM0;
    }