FreeCalypso > hg > fc-tourmaline
changeset 282:231bceb7d95c
skip switch-on buzzer beep in UI-enabled builds
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Fri, 24 Sep 2021 03:23:55 +0000 |
| parents | a75eefbf8be4 |
| children | d9e3f3e293ac |
| files | src/cs/system/main/create_RVtasks.c |
| diffstat | 1 files changed, 20 insertions(+), 1 deletions(-) [+] |
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--- a/src/cs/system/main/create_RVtasks.c Fri Sep 24 02:03:08 2021 +0000 +++ b/src/cs/system/main/create_RVtasks.c Fri Sep 24 03:23:55 2021 +0000 @@ -581,7 +581,26 @@ Switch_ON(); #endif -#if (_GSM==1) +/* + * FreeCalypso change: we omit the BZ_BeyKeep_ON() action + * in UI-enabled builds, which will also have FCBM. + * In these builds the switch-on feedback to the user is the phone + * or devboard LCD lighting up, hence the buzzer feedback becomes + * redundant. + * + * Besides UI-level redundancy, another problem with ringing the + * buzzer here occurs in charging boot scenarios, when Iota switch-on + * marks the transition from precharge to fw-driven charging. + * Experience shows that when the battery just barely made it past + * Iota switch-on threshold, the extra current draw caused by either + * the buzzer or the LCD backlight may be enough to cause an emergency + * switch-off, and several such cycles will occur before the battery + * is precharged enough to make it past this next threshold. + * Eliminating the buzzer ringing action and leaving just the LCD + * with its backlight seems like the right course of action in this + * scenario. + */ +#if (_GSM==1) && !defined(RVM_FCBM_SWE) BZ_KeyBeep_ON (); // Audio feedback if ON/OFF pushed #endif // if (_GSM==1)