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author | Joey Castillo <joeycastillo@utexas.edu> | 2022-02-12 22:19:01 -0500 |
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committer | Joey Castillo <joeycastillo@utexas.edu> | 2022-02-12 22:19:01 -0500 |
commit | b8cb6f3bcf52d5c94f1cc99879deaceb9cbaf7b5 (patch) | |
tree | d76deab3bb0ba2bc2035b33b6571e83706540d62 /movement/movement.c | |
parent | 5dac14974c9b2d00431430e9f24dd7e26f69246f (diff) | |
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movement: prevent invalid tick frequency from breaking scheduled tasks
Diffstat (limited to 'movement/movement.c')
-rw-r--r-- | movement/movement.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/movement/movement.c b/movement/movement.c index aa95f2f1..42b73526 100644 --- a/movement/movement.c +++ b/movement/movement.c @@ -152,14 +152,19 @@ static void _movement_handle_scheduled_tasks(void) { } void movement_request_tick_frequency(uint8_t freq) { - if (freq == 128) return; // Movement uses the 128 Hz tick internally + // Movement uses the 128 Hz tick internally + if (freq == 128) return; + + // Movement requires at least a 1 Hz tick. + // If we are asked for an invalid frequency, default back to 1 Hz. + if (freq == 0 || __builtin_popcount(freq) != 1) freq = 1; // disable all callbacks except the 128 Hz one watch_rtc_disable_matching_periodic_callbacks(0xFE); movement_state.subsecond = 0; movement_state.tick_frequency = freq; - if (freq) watch_rtc_register_periodic_callback(cb_tick, freq); + watch_rtc_register_periodic_callback(cb_tick, freq); } void movement_illuminate_led(void) { |