+++ /dev/null
-/*
- * MIT License
- *
- * Copyright (c) 2025 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.
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include "light_meter_face.h"
-#include "tc.h"
-#include "eic.h"
-#include "usb.h"
-#include "adc.h"
-
-#ifdef HAS_IR_SENSOR
-
-static void _light_meter_face_update_display(light_meter_state_t *state, uint8_t subsecond) {
- if (state->mode >= LIGHT_METER_MODE_AP_IS_SETTING_ISO) {
- // Handle ISO settings mode.
- watch_clear_display();
- // Custom LCD can say "ISO". On Classic, we can't show an S in position 1, so "FI" for FIlm speed will have to suffice.
- watch_display_text_with_fallback(WATCH_POSITION_TOP_LEFT, "ISO", "FI");
-
- if (subsecond % 2) {
- // for speeds above 50 ISO, last two digits will always be 00.
- if (state->iso >= LIGHT_METER_ISO_100) {
- watch_display_text(WATCH_POSITION_MINUTES, "00");
- }
-
- switch (state->iso) {
- case LIGHT_METER_ISO_25:
- watch_display_text(WATCH_POSITION_MINUTES, "25");
- break;
- case LIGHT_METER_ISO_50:
- watch_display_text(WATCH_POSITION_MINUTES, "50");
- break;
- case LIGHT_METER_ISO_100:
- watch_display_text(WATCH_POSITION_HOURS, " 1");
- break;
- case LIGHT_METER_ISO_200:
- watch_display_text(WATCH_POSITION_HOURS, " 2");
- break;
- case LIGHT_METER_ISO_400:
- watch_display_text(WATCH_POSITION_HOURS, " 4");
- break;
- case LIGHT_METER_ISO_800:
- watch_display_text(WATCH_POSITION_HOURS, " 8");
- break;
- case LIGHT_METER_ISO_1600:
- watch_display_text(WATCH_POSITION_HOURS, "16");
- break;
- case LIGHT_METER_ISO_3200:
- watch_display_text(WATCH_POSITION_HOURS, "32");
- break;
- case LIGHT_METER_ISO_COUNT:
- // will not reach here
- break;
- }
- }
- } else {
- // we are in aperture or shutter priority mode.
- light_meter_aperture_t aperture;
- light_meter_shutter_speed_t shutter;
- uint16_t light_level;
-
- if (!adc_is_enabled()) {
- /// TODO: need to test this more. If a background task takes a reading and disables the ADC,
- // we might hang trying to get an analog value below? So enable it just in case?
- // Test and confirm this works before removing this comment.
- adc_enable();
- return;
- }
-
- light_level = adc_get_analog_value(HAL_GPIO_IRSENSE_pin());
-
- /// FIXME: This curve is garbage, but in theory it was meant to convert the light level to an exposure index at ISO 25.
- // Readings were taken with the custom LCD and the standard Casio light spreader in place.
- // PLENTY of room for improvement here!
- const float L = 63188.86f;
- const float k = 0.8654f;
- const float x0 = 7.45f;
- const float C = 2491.21f;
- float exposure_index = x0 + (1.0f / k) * log((L / ((float)light_level - C)) - 1);
- if (isnan(exposure_index)) exposure_index = 0;
-
- int8_t target_exposure_index_at_f1_or_1s = (int8_t) round(exposure_index) + state->iso;
-
- if (state->mode == LIGHT_METER_MODE_APERTURE_PRIORITY) {
- aperture = state->aperture_priority;
- shutter = target_exposure_index_at_f1_or_1s - (state->aperture_priority - LIGHT_METER_APERTURE_F1);
- } else {
- shutter = state->shutter_priority;
- aperture = target_exposure_index_at_f1_or_1s - (state->shutter_priority - LIGHT_METER_SHUTTER_1_SEC);
- }
- if (shutter < LIGHT_METER_SHUTTER_1_SEC) shutter = LIGHT_METER_SHUTTER_1_SEC;
- if (aperture < LIGHT_METER_APERTURE_F1) aperture = LIGHT_METER_APERTURE_F1;
-
- // F stop is shown in both AP and SP modes.
- watch_clear_display();
- watch_display_text_with_fallback(WATCH_POSITION_TOP_LEFT, " F/", " F");
-
- switch (aperture) {
- case LIGHT_METER_APERTURE_F1:
- watch_display_text(WATCH_POSITION_TOP_RIGHT, " ");
- watch_display_text_with_fallback(WATCH_POSITION_TOP, "TooLo", "LO");
- break;
- case LIGHT_METER_APERTURE_F1_4:
- watch_display_text(WATCH_POSITION_TOP_RIGHT, "14");
- break;
- case LIGHT_METER_APERTURE_F2:
- watch_display_text(WATCH_POSITION_TOP_RIGHT, "2 ");
- break;
- case LIGHT_METER_APERTURE_F2_8:
- watch_display_text(WATCH_POSITION_TOP_RIGHT, "28");
- break;
- case LIGHT_METER_APERTURE_F4:
- // classic LCD cannot display 4 in the left digit.
- watch_display_text_with_fallback(WATCH_POSITION_TOP_RIGHT, "4 ", " 4");
- break;
- case LIGHT_METER_APERTURE_F5_6:
- // alas this is the goofy one on classic LCD: 5 will look a bit like a cursed sigil here.
- watch_display_text(WATCH_POSITION_TOP_RIGHT, "56");
- break;
- case LIGHT_METER_APERTURE_F8:
- watch_display_text_with_fallback(WATCH_POSITION_TOP_RIGHT, "8 ", " 8");
- break;
- case LIGHT_METER_APERTURE_F11:
- watch_display_text(WATCH_POSITION_TOP_RIGHT, "11");
- break;
- case LIGHT_METER_APERTURE_F16:
- watch_display_text(WATCH_POSITION_TOP_RIGHT, "16");
- break;
- case LIGHT_METER_APERTURE_F22:
- watch_display_text(WATCH_POSITION_TOP_RIGHT, "22");
- break;
- case LIGHT_METER_APERTURE_F32:
- watch_display_text(WATCH_POSITION_TOP_RIGHT, "32");
- break;
- default:
- watch_display_text_with_fallback(WATCH_POSITION_BOTTOM, "too HI", "HIGH ");
- break;
- }
-
- // th at bottom is also shown always
- watch_display_text(WATCH_POSITION_SECONDS, "th");
- if (shutter >= LIGHT_METER_SHUTTER_1_500) {
- // over a 500th of a second, last two digits are always 00
- watch_display_text(WATCH_POSITION_MINUTES, "00");
- }
-
- switch (shutter) {
- case LIGHT_METER_SHUTTER_1_SEC:
- case LIGHT_METER_SHUTTER_1_2:
- watch_display_text_with_fallback(WATCH_POSITION_BOTTOM, "tooLOw", " LO ");
- break;
- case LIGHT_METER_SHUTTER_1_4:
- watch_display_text(WATCH_POSITION_MINUTES, " 4");
- break;
- case LIGHT_METER_SHUTTER_1_8:
- watch_display_text(WATCH_POSITION_MINUTES, " 8");
- break;
- case LIGHT_METER_SHUTTER_1_15:
- watch_display_text(WATCH_POSITION_MINUTES, "15");
- break;
- case LIGHT_METER_SHUTTER_1_30:
- watch_display_text(WATCH_POSITION_MINUTES, "30");
- break;
- case LIGHT_METER_SHUTTER_1_60:
- watch_display_text(WATCH_POSITION_MINUTES, "60");
- break;
- case LIGHT_METER_SHUTTER_1_125:
- watch_display_text(WATCH_POSITION_HOURS, " 1");
- watch_display_text(WATCH_POSITION_MINUTES, "25");
- break;
- case LIGHT_METER_SHUTTER_1_250:
- watch_display_text(WATCH_POSITION_HOURS, " 2");
- watch_display_text(WATCH_POSITION_MINUTES, "50");
- break;
- case LIGHT_METER_SHUTTER_1_500:
- watch_display_text(WATCH_POSITION_HOURS, " 5");
- break;
- case LIGHT_METER_SHUTTER_1_1000:
- watch_display_text(WATCH_POSITION_HOURS, "10");
- break;
- case LIGHT_METER_SHUTTER_1_2000:
- watch_display_text(WATCH_POSITION_HOURS, "20");
- break;
- case LIGHT_METER_SHUTTER_1_4000:
- watch_display_text(WATCH_POSITION_HOURS, "40");
- break;
- default:
- watch_display_text_with_fallback(WATCH_POSITION_BOTTOM, "too HI", "HIGH ");
- break;
- }
- }
-}
-
-void light_meter_face_setup(uint8_t watch_face_index, void ** context_ptr) {
- (void) watch_face_index;
- if (*context_ptr == NULL) {
- *context_ptr = malloc(sizeof(light_meter_state_t));
- memset(*context_ptr, 0, sizeof(light_meter_state_t));
- light_meter_state_t *state = (light_meter_state_t *)*context_ptr;
- state->iso = LIGHT_METER_ISO_100;
- state->mode = LIGHT_METER_MODE_APERTURE_PRIORITY;
- state->aperture_priority = LIGHT_METER_APERTURE_F8;
- state->shutter_priority = LIGHT_METER_SHUTTER_1_250;
- }
-}
-
-void light_meter_face_activate(void *context) {
- light_meter_state_t *state = (light_meter_state_t *)context;
- (void) state;
- HAL_GPIO_IR_ENABLE_out();
- HAL_GPIO_IR_ENABLE_clr();
- HAL_GPIO_IRSENSE_pmuxen(HAL_GPIO_PMUX_ADC);
- adc_init();
- adc_enable();
- movement_request_tick_frequency(4);
-}
-
-bool light_meter_face_loop(movement_event_t event, void *context) {
- light_meter_state_t *state = (light_meter_state_t *)context;
- (void) state;
-
- switch (event.event_type) {
- case EVENT_NONE:
- case EVENT_ACTIVATE:
- case EVENT_TICK:
- {
- _light_meter_face_update_display(state, event.subsecond);
- }
- break;
- case EVENT_LIGHT_BUTTON_DOWN:
- // suppress LED, as it would interfere with light sensing
- break;
- case EVENT_LIGHT_BUTTON_UP:
- switch (state->mode) {
- case LIGHT_METER_MODE_APERTURE_PRIORITY:
- // in AP mode, move to SP
- state->mode = LIGHT_METER_MODE_SHUTTER_PRIORITY;
- break;
- case LIGHT_METER_MODE_SHUTTER_PRIORITY:
- // in SP mode, move to AP
- state->mode = LIGHT_METER_MODE_APERTURE_PRIORITY;
- break;
- case LIGHT_METER_MODE_AP_IS_SETTING_ISO:
- // if we are setting ISO, return to the mode we were in before
- state->mode = LIGHT_METER_MODE_APERTURE_PRIORITY;
- break;
- case LIGHT_METER_MODE_SP_IS_SETTING_ISO:
- state->mode = LIGHT_METER_MODE_SHUTTER_PRIORITY;
- break;
- }
- _light_meter_face_update_display(state, event.subsecond);
- break;
- case EVENT_ALARM_BUTTON_UP:
- switch (state->mode) {
- case LIGHT_METER_MODE_APERTURE_PRIORITY:
- state->aperture_priority = (state->aperture_priority + 1) % LIGHT_METER_APERTURE_COUNT;
- break;
- case LIGHT_METER_MODE_SHUTTER_PRIORITY:
- state->shutter_priority = (state->shutter_priority + 1) % LIGHT_METER_SHUTTER_COUNT;
- break;
- case LIGHT_METER_MODE_AP_IS_SETTING_ISO:
- case LIGHT_METER_MODE_SP_IS_SETTING_ISO:
- state->iso = (state->iso + 1) % LIGHT_METER_ISO_COUNT;
- break;
- }
- _light_meter_face_update_display(state, event.subsecond);
- break;
- case EVENT_ALARM_LONG_PRESS:
- switch (state->mode) {
- case LIGHT_METER_MODE_APERTURE_PRIORITY:
- case LIGHT_METER_MODE_SHUTTER_PRIORITY:
- // long press in either aperture or shutter priority mode sets the ISO.
- state->mode = state->mode + 2;
- break;
- case LIGHT_METER_MODE_AP_IS_SETTING_ISO:
- case LIGHT_METER_MODE_SP_IS_SETTING_ISO:
- state->mode = state->mode - 2;
- break;
- }
- _light_meter_face_update_display(state, event.subsecond);
- break;
- case EVENT_LOW_ENERGY_UPDATE:
- if (!watch_sleep_animation_is_running()) {
- // start the animation
- watch_clear_display();
- watch_start_sleep_animation(1000);
- // we are not going to sense light in low energy mode, it's a waste of battery.
- watch_display_text_with_fallback(WATCH_POSITION_TOP, "Meter", "MT");
- watch_display_text_with_fallback(WATCH_POSITION_BOTTOM, "OFF ", "OF F ");
- // turn off our power hungry sensors
- adc_disable();
- HAL_GPIO_IRSENSE_pmuxdis();
- HAL_GPIO_IRSENSE_off();
- HAL_GPIO_IR_ENABLE_off();
- }
- break;
- default:
- return movement_default_loop_handler(event);
- }
-
- return false;
-}
-
-void light_meter_face_resign(void *context) {
- (void) context;
-
- adc_disable();
- HAL_GPIO_IRSENSE_pmuxdis();
- HAL_GPIO_IRSENSE_off();
- HAL_GPIO_IR_ENABLE_off();
-}
-
-#endif // HAS_IR_SENSOR
+++ /dev/null
-/*
- * MIT License
- *
- * Copyright (c) 2025 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.
- */
-
-#pragma once
-
-#include "movement.h"
-
-#ifdef HAS_IR_SENSOR
-
-/*
- * LIGHT METER
- *
- * EXTREME WORK IN PROGRESS on a photographic light meter.
- * Currently not even remotely calibrated! I did one afternoon of tests with light
- * transmitted through the custom LCD, and half-assedly applied a curve that almost
- * not not quite entirely fit the data. Pull requests welcome!
- *
- */
-
-typedef enum {
- LIGHT_METER_APERTURE_F1 = -1, // f/1 will not appear as an aperture priority option
- LIGHT_METER_APERTURE_F1_4, // numbered 0, f/1.4 is the first aperture priority option
- LIGHT_METER_APERTURE_F2,
- LIGHT_METER_APERTURE_F2_8,
- LIGHT_METER_APERTURE_F4,
- LIGHT_METER_APERTURE_F5_6,
- LIGHT_METER_APERTURE_F8,
- LIGHT_METER_APERTURE_F11,
- LIGHT_METER_APERTURE_F16,
- LIGHT_METER_APERTURE_F22,
- LIGHT_METER_APERTURE_F32,
- LIGHT_METER_APERTURE_COUNT
-} light_meter_aperture_t;
-
-typedef enum {
- LIGHT_METER_SHUTTER_1_SEC = -2, // 1 second and 1/2 second will not appear as a shutter priority option
- LIGHT_METER_SHUTTER_1_2,
- LIGHT_METER_SHUTTER_1_4, // numbered 0, 1/4 second is the first one to appear in AP list
- LIGHT_METER_SHUTTER_1_8,
- LIGHT_METER_SHUTTER_1_15,
- LIGHT_METER_SHUTTER_1_30,
- LIGHT_METER_SHUTTER_1_60,
- LIGHT_METER_SHUTTER_1_125,
- LIGHT_METER_SHUTTER_1_250,
- LIGHT_METER_SHUTTER_1_500,
- LIGHT_METER_SHUTTER_1_1000,
- LIGHT_METER_SHUTTER_1_2000,
- LIGHT_METER_SHUTTER_1_4000,
- LIGHT_METER_SHUTTER_COUNT
-} light_meter_shutter_speed_t;
-
-typedef enum {
- LIGHT_METER_ISO_25 = 0,
- LIGHT_METER_ISO_50,
- LIGHT_METER_ISO_100,
- LIGHT_METER_ISO_200,
- LIGHT_METER_ISO_400,
- LIGHT_METER_ISO_800,
- LIGHT_METER_ISO_1600,
- LIGHT_METER_ISO_3200,
- LIGHT_METER_ISO_COUNT
-} light_meter_iso_t;
-
-typedef enum {
- LIGHT_METER_MODE_APERTURE_PRIORITY = 0,
- LIGHT_METER_MODE_SHUTTER_PRIORITY,
- LIGHT_METER_MODE_AP_IS_SETTING_ISO,
- LIGHT_METER_MODE_SP_IS_SETTING_ISO
-} light_meter_mode_t;
-
-typedef struct {
- light_meter_mode_t mode;
- light_meter_iso_t iso;
- light_meter_aperture_t aperture_priority;
- light_meter_shutter_speed_t shutter_priority;
-} light_meter_state_t;
-
-void light_meter_face_setup(uint8_t watch_face_index, void ** context_ptr);
-void light_meter_face_activate(void *context);
-bool light_meter_face_loop(movement_event_t event, void *context);
-void light_meter_face_resign(void *context);
-
-#define light_meter_face ((const watch_face_t){ \
- light_meter_face_setup, \
- light_meter_face_activate, \
- light_meter_face_loop, \
- light_meter_face_resign, \
- NULL, \
-})
-
-#endif // HAS_IR_SENSOR
projects / sensor-watch.git / commitdiff