387 lines
13 KiB
C
387 lines
13 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2020-2024 Joey Castillo
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <stdlib.h>
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#include "delay.h"
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#include "usb.h"
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#include "pins.h"
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#include "watch_slcd.h"
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#include "watch_common_display.h"
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#include "slcd.h"
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#include "tc.h"
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#include "adc.h"
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//////////////////////////////////////////////////////////////////////////////////////////
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// Segmented Display
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static uint16_t _slcd_framerate = 0;
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static uint16_t _slcd_fc_min_ms_bypass = 0;
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static watch_lcd_type_t _installed_display = WATCH_LCD_TYPE_UNKNOWN;
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/// NOTE: The function below was commented out because LCD autodetection proved unreliable.
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/// While I would love to fix it, I can't figure it out in time for the product launch.
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/// Instead, this function simply implements the failsafe: red LED glows until one of two
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/// buttons is pressed: bottom left button for classic LCD, bottom right button for custom.
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///
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void watch_discover_lcd_type(void) {
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#if defined(FORCE_CUSTOM_LCD_TYPE)
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_installed_display = WATCH_LCD_TYPE_CUSTOM;
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_watch_update_indicator_segments();
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return;
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#elif defined(FORCE_CLASSIC_LCD_TYPE)
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_installed_display = WATCH_LCD_TYPE_CLASSIC;
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return;
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#endif
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// Don't bother detecting the LCD type if we're plugged into USB.
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if (usb_is_enabled()) return;
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// Set red LED to indicate that LED detection is active.
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watch_enable_leds();
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watch_set_led_color_rgb(16, 0, 0);
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// Configure buttons as inputs.
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HAL_GPIO_BTN_MODE_in();
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HAL_GPIO_BTN_MODE_pulldown();
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HAL_GPIO_BTN_ALARM_in();
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HAL_GPIO_BTN_ALARM_pulldown();
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// Press MODE for classic, ALARM for new. The mnemonic to remember this: left button,
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// backwards in time: classic LCD; right button, forward in time: new custom LCD.
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while(1) {
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if (HAL_GPIO_BTN_MODE_read()) {
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_installed_display = WATCH_LCD_TYPE_CLASSIC;
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break;
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}
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if (HAL_GPIO_BTN_ALARM_read()) {
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_installed_display = WATCH_LCD_TYPE_CUSTOM;
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break;
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}
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delay_ms(4);
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}
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// LCD was detected. Kill the LED.
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// Don't worry about the buttons, they'll be taken care of later.
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watch_set_led_off();
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watch_disable_leds();
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// Update indicator segment mapping based on the detected display (they are v different).
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_watch_update_indicator_segments();
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}
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/*
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void watch_discover_lcd_type(void) {
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#if defined(FORCE_CUSTOM_LCD_TYPE)
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_installed_display = WATCH_LCD_TYPE_CUSTOM;
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goto valid_display_detected;
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#elif defined(FORCE_CLASSIC_LCD_TYPE)
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_installed_display = WATCH_LCD_TYPE_CLASSIC;
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goto valid_display_detected;
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#endif
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// Don't bother detecting the LCD type if we're plugged into USB.
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if (usb_is_enabled()) return;
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uint16_t slcd3, slcd4;
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int difference;
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uint8_t valid_frames_classic = 0;
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uint8_t valid_frames_custom = 0;
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/// TODO: Test this at lower battery levels. Do the thresholds hold up?
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const uint16_t lo_threshold = 12000;
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const uint16_t hi_threshold = 32000;
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// taking advantage of the fact that LCD segments are like little capacitors,
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// we're going to introduce an alternating voltage on SLCD2, or COM2.
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HAL_GPIO_SLCD2_out();
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// Then we're going to read the voltage on SLCD3 and SLCD4:
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// * On classic LCD, we will expect to see the voltage change on SLCD3 (SEG0) and SLCD4 (SEG1)
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// * On custom LCD, we will expect to see the voltage change on SLCD4 (SEG1) but not SLCD3 (COM4)
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adc_init();
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adc_enable();
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HAL_GPIO_SLCD3_pmuxen(HAL_GPIO_PMUX_ADC);
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HAL_GPIO_SLCD4_pmuxen(HAL_GPIO_PMUX_ADC);
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// as a failsafe, we have button inputs: MODE for classic, ALARM for new.
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// (think: left button, backwards in time: classic; right button, forward, new: custom)
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HAL_GPIO_BTN_MODE_in();
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HAL_GPIO_BTN_MODE_pulldown();
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HAL_GPIO_BTN_ALARM_in();
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HAL_GPIO_BTN_ALARM_pulldown();
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/// TODO: Remove this and the watch_set_led_off below; it's here for testing (people will see red if their LCD was undetectable)
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watch_set_led_red();
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while(1) {
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HAL_GPIO_SLCD2_set();
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slcd3 = adc_get_analog_value(HAL_GPIO_SLCD3_pin());
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slcd4 = adc_get_analog_value(HAL_GPIO_SLCD4_pin());
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difference = abs((int)slcd4 - (int)slcd3);
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// printf("1, slcd3: %d, slcd4: %d, diff: %d\n", slcd3, slcd4, difference);
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if (slcd3 > hi_threshold && slcd4 > hi_threshold && abs(difference) < 1000) {
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valid_frames_classic++;
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} else if (slcd4 > hi_threshold && abs(difference) > 5000) {
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valid_frames_custom++;
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}
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delay_ms(4);
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HAL_GPIO_SLCD2_clr();
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slcd3 = adc_get_analog_value(HAL_GPIO_SLCD3_pin());
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slcd4 = adc_get_analog_value(HAL_GPIO_SLCD4_pin());
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difference = (int)slcd4 - (int)slcd3;
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// printf("0, slcd3: %d, slcd4: %d, diff: %d\n", slcd3, slcd4, difference);
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if (slcd3 < lo_threshold && slcd4 < lo_threshold && abs(difference) < 100) {
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valid_frames_classic++;
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} else if (slcd4 < lo_threshold && abs(difference) > 5000) {
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valid_frames_custom++;
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}
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if (valid_frames_classic > 16 || valid_frames_custom > 16) {
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break;
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}
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// The failsafe: if our detection isn't working, the user can tell us which display is installed.
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if (HAL_GPIO_BTN_MODE_read()) {
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_installed_display = WATCH_LCD_TYPE_CLASSIC;
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goto valid_display_detected;
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}
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if (HAL_GPIO_BTN_ALARM_read()) {
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_installed_display = WATCH_LCD_TYPE_CUSTOM;
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goto valid_display_detected;
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}
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delay_ms(4);
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}
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watch_set_led_off();
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HAL_GPIO_SLCD2_off();
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HAL_GPIO_SLCD3_off();
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HAL_GPIO_SLCD4_off();
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adc_disable();
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if (valid_frames_classic > 16) {
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_installed_display = WATCH_LCD_TYPE_CLASSIC;
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} else if (valid_frames_custom > 16) {
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_installed_display = WATCH_LCD_TYPE_CUSTOM;
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}
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valid_display_detected:
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_watch_update_indicator_segments();
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}
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*/
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watch_lcd_type_t watch_get_lcd_type(void) {
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return _installed_display;
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}
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void watch_enable_display(void) {
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// No need to do anything if the display is already enabled.
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/// TODO: Wrap this in a gossamer call.
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if (SLCD->CTRLA.bit.ENABLE) return;
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watch_discover_lcd_type();
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HAL_GPIO_SLCD0_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD1_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD2_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD3_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD4_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD5_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD6_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD7_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD8_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD9_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD10_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD11_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD12_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD13_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD14_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD15_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD16_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD17_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD18_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD19_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD20_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD21_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD22_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD23_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD24_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD25_pmuxen(HAL_GPIO_PMUX_B);
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HAL_GPIO_SLCD26_pmuxen(HAL_GPIO_PMUX_B);
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if (_installed_display == WATCH_LCD_TYPE_CUSTOM) {
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// Custom LCD: 1/3 bias, 1/4 duty with a frame rate of 32 Hz
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slcd_init(LCD_PIN_ENABLE, SLCD_BIAS_THIRD, SLCD_DUTY_4_COMMON, SLCD_CLOCKSOURCE_XOSC, SLCD_PRESCALER_DIV64, SLCD_CLOCKDIV_4);
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// exact frame rate is: 32768 / (4 * 64 * 4) ≈ 32 Hz
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_slcd_framerate = 32;
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} else {
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// Original famous Casio LCD: 1/3 bias, 1/3 duty with a frame rate of ~34 Hz
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slcd_init(LCD_PIN_ENABLE, SLCD_BIAS_THIRD, SLCD_DUTY_3_COMMON, SLCD_CLOCKSOURCE_XOSC, SLCD_PRESCALER_DIV64, SLCD_CLOCKDIV_5);
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// exact frame rate is: 32768 / (3 * 64 * 5) ≈ 34.13 Hz
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_slcd_framerate = 34;
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}
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// calculate the smallest duration we can time before we have to engage the frame counter prescaler bypass
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_slcd_fc_min_ms_bypass = 32 * (1000 / _slcd_framerate);
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slcd_clear();
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if (_installed_display == WATCH_LCD_TYPE_CUSTOM) {
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slcd_set_contrast(0);
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} else {
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slcd_set_contrast(9);
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}
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slcd_enable();
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}
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void watch_disable_display(void) {
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slcd_disable();
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}
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inline void watch_set_pixel(uint8_t com, uint8_t seg) {
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slcd_set_segment(com, seg);
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}
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inline void watch_clear_pixel(uint8_t com, uint8_t seg) {
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slcd_clear_segment(com, seg);
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}
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void watch_clear_display(void) {
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slcd_clear();
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}
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void watch_start_character_blink(char character, uint32_t duration) {
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slcd_set_frame_counter_enabled(0, false);
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if (duration <= _slcd_fc_min_ms_bypass) {
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slcd_configure_frame_counter(0, (duration / (1000 / _slcd_framerate)) - 1, false);
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} else {
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slcd_configure_frame_counter(0, ((duration / (1000 / _slcd_framerate)) / 8 - 1), true);
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}
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slcd_set_frame_counter_enabled(0, true);
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watch_display_character(character, 7);
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watch_clear_pixel(2, 10); // clear segment B of position 7 since it can't blink
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slcd_disable();
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slcd_set_blink_enabled(false);
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slcd_configure_blink(false, 0x0F, 0x0F, 0);
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slcd_set_blink_enabled(true);
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slcd_enable();
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}
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void watch_start_indicator_blink_if_possible(watch_indicator_t indicator, uint32_t duration) {
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if (_installed_display == WATCH_LCD_TYPE_CUSTOM) {
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// Indicators can only blink on the custom LCD.
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uint8_t mask = 0;
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switch (indicator) {
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case WATCH_INDICATOR_COLON:
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mask = 0b0001;
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break;
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case WATCH_INDICATOR_LAP:
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mask = 0b0010;
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break;
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case WATCH_INDICATOR_ARROWS:
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mask = 0b0100;
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break;
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case WATCH_INDICATOR_SLEEP:
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mask = 0b1000;
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break;
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default:
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return;
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}
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watch_set_indicator(indicator);
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if (duration <= _slcd_fc_min_ms_bypass) {
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slcd_configure_frame_counter(0, (duration / (1000 / _slcd_framerate)) - 1, false);
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} else {
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slcd_configure_frame_counter(0, ((duration / (1000 / _slcd_framerate)) / 8 - 1), true);
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}
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slcd_set_frame_counter_enabled(0, true);
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slcd_disable();
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slcd_set_blink_enabled(false);
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slcd_configure_blink(false, mask, 0, 0);
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slcd_set_blink_enabled(true);
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slcd_enable();
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}
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}
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void watch_stop_blink(void) {
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slcd_set_frame_counter_enabled(0, false);
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slcd_set_blink_enabled(false);
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}
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void watch_start_sleep_animation(uint32_t duration) {
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if (_installed_display == WATCH_LCD_TYPE_CUSTOM) {
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// on pro LCD, we just show the sleep indicator
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watch_set_indicator(WATCH_INDICATOR_SLEEP);
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} else {
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// on classic LCD we do the "tick/tock" animation
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watch_display_character(' ', 8);
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watch_display_character(' ', 9);
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slcd_disable();
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slcd_set_frame_counter_enabled(1, false);
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slcd_set_circular_shift_animation_enabled(false);
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if (duration <= _slcd_fc_min_ms_bypass) {
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slcd_configure_frame_counter(1, (duration / (1000 / _slcd_framerate)) - 1, false);
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} else {
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slcd_configure_frame_counter(1, ((duration / (1000 / _slcd_framerate)) / 8 - 1), true);
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}
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slcd_set_frame_counter_enabled(1, true);
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slcd_configure_circular_shift_animation(0b00000001, 1, SLCD_CSRSHIFT_LEFT, 1);
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slcd_set_circular_shift_animation_enabled(true);
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slcd_enable();
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}
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}
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bool watch_sleep_animation_is_running(void) {
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// TODO: wrap this in gossamer call
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if (_installed_display == WATCH_LCD_TYPE_CUSTOM) {
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// COM3, SEG0 contains the half moon icon
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return SLCD->SDATAL3.bit.SDATA & 1;
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} else {
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// CSREN indicates that the tick/tick animation is running
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return SLCD->CTRLD.bit.CSREN;
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}
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}
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void watch_stop_sleep_animation(void) {
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if (_installed_display == WATCH_LCD_TYPE_CUSTOM) {
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watch_clear_indicator(WATCH_INDICATOR_SLEEP);
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} else {
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slcd_set_circular_shift_animation_enabled(false);
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watch_display_character(' ', 8);
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}
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}
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