108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/*
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* SPDX-License-Identifier: AGPL-3.0-only
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* Copyright (c) Camden Dixie O'Brien
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*/
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#include "display.h"
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#include "display_driver.h"
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#include "fatal.h"
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#include "time.h"
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#include "esp_log.h"
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#include "esp_timer.h"
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#include <string.h>
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#define TAG "Display"
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#define DRIVER_TASK_PERIOD_US 4000UL
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#define TIME_UPDATE_PERIOD_US 1000000UL
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#define CLAMP(x, lim) ((x) > (lim) ? (lim) : (x))
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const DisplayDigitState digit_encodings[10] = {
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[0] = { true, true, true, true, true, true, false, false },
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[1] = { false, true, true, false, false, false, false, false },
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[2] = { true, true, false, true, true, false, true, false },
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[3] = { true, true, true, true, false, false, true, false },
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[4] = { false, true, true, false, false, true, true, false },
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[5] = { true, false, true, true, false, true, true, false },
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[6] = { true, false, true, true, true, true, true, false },
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[7] = { true, true, true, false, false, false, false, false },
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[8] = { true, true, true, true, true, true, true, false },
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[9] = { true, true, true, false, false, true, true, false },
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};
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static void show_digit(DisplayDigit digit, unsigned value)
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{
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memcpy(
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&display_state[digit], digit_encodings[value],
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sizeof(DisplayDigitState));
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}
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static void show_time(unsigned hour, unsigned minute)
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{
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if (hour > 99 || minute > 99)
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ESP_LOGW(TAG, "Un-displayable time: %02u:%02u", hour, minute);
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show_digit(DISPLAY_DIGIT_1, (hour / 10) % 10);
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show_digit(DISPLAY_DIGIT_2, hour % 10);
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display_state[DISPLAY_DIGIT_2][DISPLAY_SEGMENT_DP] = true;
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show_digit(DISPLAY_DIGIT_3, (minute / 10) % 10);
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show_digit(DISPLAY_DIGIT_4, minute % 10);
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}
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static void update_time(void *arg)
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{
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(void)arg;
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const Time time = time_get();
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show_time(time.hour, time.minute);
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}
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void display_init()
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{
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esp_err_t error;
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display_driver_init();
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esp_timer_handle_t driver_timer;
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const esp_timer_create_args_t driver_timer_config = {
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.callback = &display_driver_task,
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.arg = NULL,
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.name = "display driver task",
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};
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error = esp_timer_create(&driver_timer_config, &driver_timer);
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if (error != ESP_OK) {
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ESP_LOGE(TAG, "Error creating timer for driver task: %04x", error);
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FATAL();
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}
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error = esp_timer_start_periodic(driver_timer, DRIVER_TASK_PERIOD_US);
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if (error != ESP_OK) {
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ESP_LOGE(TAG, "Error starting timer for driver task: %04x", error);
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FATAL();
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}
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esp_timer_handle_t update_timer;
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const esp_timer_create_args_t update_timer_config = {
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.callback = &update_time,
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.arg = NULL,
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.name = "display driver task",
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};
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error = esp_timer_create(&update_timer_config, &update_timer);
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if (error != ESP_OK) {
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ESP_LOGE(TAG, "Error creating timer for driver task: %04x", error);
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FATAL();
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}
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error = esp_timer_start_periodic(update_timer, TIME_UPDATE_PERIOD_US);
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if (error != ESP_OK) {
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ESP_LOGE(TAG, "Error starting timer for driver task: %04x", error);
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FATAL();
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}
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update_time(NULL);
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}
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