add watch face to display files on the filesystem

movement_faces.h

@@ -73,4 +73,5 @@
 #include "wareki_face.h"
 #include "deadline_face.h"
 #include "wordle_face.h"
+#include "file_display_face.h"
 // New includes go above this line.

watch-faces.mk

@@ -48,4 +48,5 @@ SRCS += \
   ./watch-faces/sensor/lis2dw_monitor_face.c \
   ./watch-faces/complication/wareki_face.c \
   ./watch-faces/complication/deadline_face.c \
+  ./watch-faces/complication/file_display_face.c \
 # New watch faces go above this line.

watch-faces/complication/file_display_face.c

@@ -0,0 +1,148 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2024-2025 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 "file_display_face.h"
+#include "tc.h"
+#include "eic.h"
+#include "usb.h"
+#include "uart.h"
+#include "filesystem.h"
+
+#ifdef HAS_IR_SENSOR
+
+void file_display_face_setup(uint8_t watch_face_index, void ** context_ptr) {
+    (void) watch_face_index;
+    if (*context_ptr == NULL) {
+        *context_ptr = malloc(sizeof(file_demo_state_t));
+        memset(*context_ptr, 0, sizeof(file_demo_state_t));
+        // active_file is now 0 for FILE0000.TXT
+    }    
+}
+
+void file_display_face_activate(void *context) {
+    file_demo_state_t *state = (file_demo_state_t *)context;
+    (void) state;
+}
+
+bool file_display_face_loop(movement_event_t event, void *context) {
+    file_demo_state_t *state = (file_demo_state_t *)context;
+    (void) state;
+    char data[13] = {0};
+    char filename[13];
+
+    switch (event.event_type) {
+        case EVENT_NONE:
+        case EVENT_ACTIVATE:
+REDISPLAY:
+            watch_clear_display();
+            sprintf(filename, "FILE%04d.TXT", state->active_file);
+            if (filesystem_file_exists(filename)) {
+                filesystem_read_file(filename, data, sizeof(data) - 1);
+                watch_display_text_with_fallback(WATCH_POSITION_TOP_LEFT, data + 0, data + 0);
+                watch_display_text_with_fallback(WATCH_POSITION_TOP_RIGHT, data + 3, data + 3);
+                watch_display_text_with_fallback(WATCH_POSITION_BOTTOM, data + 5, data + 5);
+                // Treat last byte as flag for indicators
+                for (int i = 0; i < 8; i++) {
+                    bool indicator = (data[11] >> i) & 1;
+                    if (indicator) {
+                        switch (i) {
+                        case 0:
+                            // bit 0 lights up the bell indicator
+                            watch_set_indicator(WATCH_INDICATOR_BELL);
+                            break;
+                        case 1:
+                            // bit 1 sets the PM indicator
+                            watch_set_indicator(WATCH_INDICATOR_PM);
+                            break;
+                        case 2:
+                            // bit 2 sets the colon
+                            watch_set_colon();
+                            break;
+                        case 3:
+                            // bit 3 sets the LAP indicator
+                            watch_set_indicator(WATCH_INDICATOR_LAP);
+                            break;
+                        case 4:
+                            // bit 5 sets the decimal point on the custom LCD
+                            watch_set_decimal_if_available();
+                            break;
+                        case 6:
+                            // bit 6 sets the leading 1 on the custom LCD
+                            if (watch_get_lcd_type() == WATCH_LCD_TYPE_CUSTOM) {
+                                watch_set_pixel(0, 22);
+                            }
+                            break;
+                        case 7:
+                        case 5:
+                        default:
+                            // bit 5 must be set to make this a valid ASCII character (>= 0x20)
+                            // bit 7 also must be unset
+                            // neither of these bits correspond to an indicator.
+                            break;
+                        }
+                    }
+                }
+            } else {
+                watch_display_text_with_fallback(WATCH_POSITION_TOP_LEFT, "No ", "NO");
+                watch_display_text_with_fallback(WATCH_POSITION_BOTTOM, "F{es", " FILES");
+            }
+            break;
+        case EVENT_TICK:
+            break;
+        case EVENT_ALARM_BUTTON_UP:
+            state->active_file++;
+            sprintf(filename, "FILE%04d.TXT", state->active_file);
+            if (!filesystem_file_exists(filename)) {
+                state->active_file = 0;
+            }
+            goto REDISPLAY;
+        case EVENT_TIMEOUT:
+            movement_move_to_face(0);
+            break;
+        case EVENT_LOW_ENERGY_UPDATE:
+            // we should resign before this ever happens
+            if (watch_get_lcd_type() == WATCH_LCD_TYPE_CUSTOM) {
+                watch_set_indicator(WATCH_INDICATOR_SLEEP);
+            } else {
+                watch_clear_display();
+                watch_display_text(WATCH_POSITION_BOTTOM, "SLEEP ");
+            }
+            break;
+        default:
+            return movement_default_loop_handler(event);
+    }
+
+    return false;
+}
+
+void file_display_face_resign(void *context) {
+    file_demo_state_t *state = (file_demo_state_t *)context;
+
+    movement_force_led_off();
+    state->active_file = 0;
+}
+
+#endif // HAS_IR_SENSOR

watch-faces/complication/file_display_face.h

@@ -0,0 +1,52 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2024 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"
+
+/*
+ * FILE DISPLAY DEMO
+ *
+ * Displays the contents of a file on the watch. 
+ * For use with the irda_upload_face that allows uploading files to the watch.
+ *
+ */
+
+typedef struct {
+    uint16_t active_file;
+} file_demo_state_t;
+
+void file_display_face_setup(uint8_t watch_face_index, void ** context_ptr);
+void file_display_face_activate(void *context);
+bool file_display_face_loop(movement_event_t event, void *context);
+void file_display_face_resign(void *context);
+
+#define file_display_face ((const watch_face_t){ \
+    file_display_face_setup, \
+    file_display_face_activate, \
+    file_display_face_loop, \
+    file_display_face_resign, \
+    NULL, \
+})