diff options
Diffstat (limited to 'watch-library/hardware')
| -rw-r--r-- | watch-library/hardware/watch/watch_rtc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/watch-library/hardware/watch/watch_rtc.c b/watch-library/hardware/watch/watch_rtc.c index 881e2575..93cb9f1c 100644 --- a/watch-library/hardware/watch/watch_rtc.c +++ b/watch-library/hardware/watch/watch_rtc.c @@ -84,7 +84,7 @@ void watch_rtc_register_periodic_callback(ext_irq_cb_t callback, uint8_t frequen if (__builtin_popcount(frequency) != 1) return; // this left-justifies the period in a 32-bit integer. - uint32_t tmp = frequency << 24; + uint32_t tmp = (frequency & 0xFF) << 24; // now we can count the leading zeroes to get the value we need. // 0x01 (1 Hz) will have 7 leading zeros for PER7. 0xF0 (128 Hz) will have no leading zeroes for PER0. uint8_t per_n = __builtin_clz(tmp); @@ -99,7 +99,7 @@ void watch_rtc_register_periodic_callback(ext_irq_cb_t callback, uint8_t frequen void watch_rtc_disable_periodic_callback(uint8_t frequency) { if (__builtin_popcount(frequency) != 1) return; - uint8_t per_n = __builtin_clz(frequency << 24); + uint8_t per_n = __builtin_clz((frequency & 0xFF) << 24); RTC->MODE2.INTENCLR.reg = 1 << per_n; } |