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launcher: first crack at low power 'screensaver' mode

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This commit is contained in:
Joey Castillo
2021-10-03 20:37:15 -04:00
parent 64485b4255
commit 4300dff616
6 changed files with 84 additions and 42 deletions
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7
watch-library/watch/watch_deepsleep.c
View File

@@ -151,11 +151,8 @@ void _watch_disable_all_peripherals_except_slcd() {
MCLK->APBCMASK.reg &= ~MCLK_APBCMASK_SERCOM3;
}
void watch_enter_shallow_sleep(char *message) {
if (message != NULL) {
watch_display_string(" ", 0);
watch_display_string(message, 0);
} else {
void watch_enter_shallow_sleep(bool display_on) {
if (!display_on) {
slcd_sync_deinit(&SEGMENT_LCD_0);
hri_mclk_clear_APBCMASK_SLCD_bit(SLCD);
}

15
watch-library/watch/watch_deepsleep.h
View File

@@ -81,13 +81,8 @@ uint32_t watch_get_backup_data(uint8_t reg);
* the LCD. You can wake from this mode by pressing the ALARM button, if you have an registered an
* external wake callback on the ALARM button. When your app wakes from this shallow sleep mode, your
* app_setup method will be called, since this function will have disabled things you set up.
* @param message Either NULL, or a string representing a message to display while in shallow sleep mode. If
* this parameter is NULL, the screen will be blanked out, and this function will disable the
* SLCD peripheral for additional power savings. If the message is non-NULL, it will replace
* any text on the screen, and will be displayed at position 0 (so you should pad out the beginning
* of the string with spaces if you wish for the message to appear on line 2, i.e. " SLEEP").
* Also note that this function will NOT clear any indicator segments that you have set. This is
* by design, in case you wish to leave an indicator lit in sleep mode.
* @param display_on if true, leaves the LCD on to display whatever content was on-screen. If false, disables
* the segment LCD controller for additional power savings.
* @details This shallow sleep mode is not the lowest power mode available (see watch_enter_deep_sleep), but
* it has the benefit of retaining your application state and being able to wake from the ALARM button.
* It also provides an option for displaying a message to the user when asleep. Note that whether you
@@ -96,10 +91,10 @@ uint32_t watch_get_backup_data(uint8_t reg);
*
* Power consumption in shallow sleep mode varies a bit with the battery voltage and the temperature,
* but at 3 V and 25~30° C you can roughly estimate:
* * < 12µA current draw with the LCD controller on (message != NULL)
* * < 6µA current draw with the LCD controller off (message == NULL)
* * < 12µA current draw with the LCD controller on
* * < 6µA current draw with the LCD controller off
*/
void watch_enter_shallow_sleep(char *message);
void watch_enter_shallow_sleep(bool display_on);
/** @brief Enters the SAM L22's lowest-power mode, BACKUP.
* @details This function does some housekeeping before entering BACKUP mode. It first disables all