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Diffstat (limited to 'watch-library/shared/watch/watch_led.h')
-rw-r--r-- | watch-library/shared/watch/watch_led.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/watch-library/shared/watch/watch_led.h b/watch-library/shared/watch/watch_led.h new file mode 100644 index 00000000..9e9f5640 --- /dev/null +++ b/watch-library/shared/watch/watch_led.h @@ -0,0 +1,93 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#ifndef _WATCH_LED_H_INCLUDED +#define _WATCH_LED_H_INCLUDED +////< @file watch_led.h + +#include "watch.h" + +/** @addtogroup led LED Control + * @brief This section covers functions related to the bi-color red/green LED mounted behind the LCD. + * @details The SAM L22 is an exceedingly power efficient chip, whereas the LED's are relatively power- + * hungry. The green LED, at full power, consumes more power than the whole chip in active mode, + * and the red LED consumes about twelve times as much power! The LED's should thus be used only + * sparingly in order to preserve battery life. + * @note Some watches use a red/blue LED instead of a red/green LED. You will be able to determine this + * easily when you double tap the reset button: if the pulsing bootloader LED is red, you have a + * red/green edition; if it is blue, you have a red/blue edition. For red/blue watches, build your + * project with the command `make LED=BLUE`, and the watch library will automatically swap the pins + * so that watch_set_led_red sets the red LED, and watch_set_led_green sets the blue one. + */ +/// @{ +/** @brief Enables the bi-color LED. + * @note The TCC peripheral that drives the LEDs does not run in STANDBY mode — but the outputs do! This + * means that if you set either red, green or both LEDs to full power, they will shine even when + * your app is asleep. If, however, you set a custom color using watch_set_led_color, the color will + * not display correctly in STANDBY mode. You will need to keep your app running while the LED is on. + */ +void watch_enable_leds(void); + +/** @brief Disables the LEDs. + * @note This method will also disable the buzzer, since the buzzer and LED both make use of the same + * peripheral to drive their PWM behavior. + */ +void watch_disable_leds(void); + +/** @brief Sets the LED to a custom color by modulating each output's duty cycle. + * @param red The red value from 0-255. + * @param green The green value from 0-255. If your watch has a red/blue LED, this will be the blue value. + * @note If you are displaying a custom color, you will need to prevent your app from going to sleep + * while the LED is on; otherwise, the color will not display correctly. You can do this by + * returning false in your app_loop method. + */ +void watch_set_led_color(uint8_t red, uint8_t green); + +/** @brief Sets the red LED to full brightness, and turns the green LED off. + * @details Of the two LED's in the RG bi-color LED, the red LED is the less power-efficient one (~4.5 mA). + */ +void watch_set_led_red(void); + +/** @brief Sets the green LED to full brightness, and turns the red LED off. + * @details Of the two LED's in the RG bi-color LED, the green LED is the more power-efficient one (~0.44 mA). + * @note If your watch has a red/blue LED, this method will set the LED to blue. + */ +void watch_set_led_green(void); + +/** @brief Sets both red and green LEDs to full brightness. + * @details The total current draw between the two LED's in this mode will be ~5 mA, which is more than the + * watch draws in any other mode. Take care not to drain the battery. + * @note If your watch has a red/blue LED, this method will set the LED to pink. + */ +void watch_set_led_yellow(void); + +/** @brief Turns both the red and the green LEDs off. */ +void watch_set_led_off(void); + +__attribute__((deprecated("Use watch_enable_leds instead"))) +void watch_enable_led(bool unused); + +__attribute__((deprecated("Use watch_disable_leds instead"))) +void watch_disable_led(bool unused); +/// @} +#endif |