Upload New File

alarm/alarm.c

+/**
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "pico/stdlib.h"
+#include "lib/fonts.h"
+#include "lib/st7735.h"
+
+int main() {
+
+    //TODO: Create uints for the pins you are using
+    const uint button = 20;
+    const uint button1 = 21;
+    const uint button2 = 22;
+    bool start = false;
+
+    //TODO: Initialise the pins
+    gpio_init(button);
+    gpio_init(button1);
+    gpio_init(button2);
+
+
+    //TODO: Set the pins to in/out
+    gpio_set_dir(button, GPIO_IN);
+    gpio_set_dir(button1, GPIO_IN);
+    gpio_set_dir(button2, GPIO_IN);
+
+
+    //TODO: Initialise ST7735
+    ST7735_Init();
+    ST7735_FillScreen(ST7735_BLACK);
+
+    while (true) {
+        //TODO: Start screen and create variables
+        char tString[5];
+        int timer = 0;
+        int timerSec = 0;
+        sprintf(tString, "%2d: %2d", timer, timerSec);
+
+        
+        while (!start) {
+            //TODO: Display screen with current time, and set up each of the buttons to add a minute, remove a minute and start the timer
+            if (!gpio_get(button)) {
+                timer = timer + 1;
+                sprintf(tString, "%2d: %2d", timer, timerSec);
+            }
+            if (!gpio_get(button1)) {
+                timer = timer - 1;
+                sprintf(tString, "%2d: %2d", timer, timerSec);
+            }
+            if (!gpio_get(button2)) {
+                start = true;
+            }
+            sprintf(tString, "%2d: %2d", timer, timerSec);
+            ST7735_WriteString(5, 45, tString, Font_16x26, ST7735_WHITE, ST7735_BLACK);
+        }
+        while (start) {
+            //TODO: Display the countdown timer going down, in minutes and seconds
+            if (timer == 0 && timerSec == 0) {
+                start = false;
+            }
+            if (timerSec == 0) {
+                timer--;
+                timerSec = 59;
+            }
+            timerSec--;
+            sleep_ms(1000);
+
+            ST7735_WriteString(5, 45, tString, Font_16x26, ST7735_WHITE, ST7735_BLACK);
+        }
+        while (true) {
+            //TODO: Display a message to alert the user the timer is done (possibly flashing) which stops when a button is pressed
+            ST7735_WriteString(5, 45, "DONE", Font_16x26, ST7735_WHITE, ST7735_BLACK);
+            if (!gpio_get(button)) 
+            {
+                break;
+            }
+            if (!gpio_get(button1))
+            {
+                break;
+            }
+            if (!gpio_get(button2))
+            {
+                break;
+            }
+        }
+    }
+}