|
| 1 | +/****************************************************************************** |
| 2 | + * examples/ISR_Switch.ino |
| 3 | + * For ESP8266 boards |
| 4 | + * Written by Khoi Hoang |
| 5 | + * |
| 6 | + * Built by Khoi Hoang https://github.com/khoih-prog/ESP32TimerInterrupt |
| 7 | + * Licensed under MIT license |
| 8 | + * Version: v1.0.1 |
| 9 | + * |
| 10 | + * Notes: |
| 11 | + * Special design is necessary to share data between interrupt code and the rest of your program. |
| 12 | + * Variables usually need to be "volatile" types. Volatile tells the compiler to avoid optimizations that assume |
| 13 | + * variable can not spontaneously change. Because your function may change variables while your program is using them, |
| 14 | + * the compiler needs this hint. But volatile alone is often not enough. |
| 15 | + * When accessing shared variables, usually interrupts must be disabled. Even with volatile, |
| 16 | + * if the interrupt changes a multi-byte variable between a sequence of instructions, it can be read incorrectly. |
| 17 | + * If your data is multiple variables, such as an array and a count, usually interrupts need to be disabled |
| 18 | + * or the entire sequence of your code which accesses the data. |
| 19 | + * |
| 20 | + * Version Modified By Date Comments |
| 21 | + * ------- ----------- ---------- ----------- |
| 22 | + * 1.0.1 K Hoang 25/11/2019 New release fixing compiler error |
| 23 | + ********************************************************************************/ |
| 24 | + /* ISR_Switch demontrates the use of ISR to avoid being blocked by other CPU-monopolizing task |
| 25 | + * |
| 26 | + * In this complex example: CPU is connecting to WiFi, Internet and finally Blynk service (https://docs.blynk.cc/) |
| 27 | + * Many important tasks are fighting for limited CPU resource in this no-controlled single-tasking environment. |
| 28 | + * In certain period, mission-critical tasks (you name it) could be deprived of CPU time and have no chance |
| 29 | + * to be executed. This can lead to disastrous results at critical time. |
| 30 | + * We hereby will use interrupt to detect whenever the SW is active, then switch ON/OFF a sample relay (lamp) |
| 31 | + * We'll see this ISR-based operation will have highest priority, preempts all remaining tasks to assure its |
| 32 | + * functionality. |
| 33 | + */ |
| 34 | + |
| 35 | +//These define's must be placed at the beginning before #include "ESP8266TimerInterrupt.h" |
| 36 | +#define TIMER_INTERRUPT_DEBUG 1 |
| 37 | + |
| 38 | +#define BLYNK_PRINT Serial |
| 39 | +//#define BLYNK_DEBUG true |
| 40 | + |
| 41 | +#include <ESP8266WiFi.h> |
| 42 | + |
| 43 | +//#define USE_BLYNK_WM true |
| 44 | +#define USE_BLYNK_WM false |
| 45 | + |
| 46 | +#define USE_SSL false |
| 47 | + |
| 48 | +#if USE_BLYNK_WM |
| 49 | + #if USE_SSL |
| 50 | + #include <BlynkSimpleEsp8266_SSL_WM.h> //https://github.com/khoih-prog/Blynk_WM |
| 51 | + #else |
| 52 | + #include <BlynkSimpleEsp8266_WM.h> //https://github.com/khoih-prog/Blynk_WM |
| 53 | + #endif |
| 54 | +#else |
| 55 | + #if USE_SSL |
| 56 | + #include <BlynkSimpleEsp8266_SSL.h> |
| 57 | + #define BLYNK_HARDWARE_PORT 9443 |
| 58 | + #else |
| 59 | + #include <BlynkSimpleEsp8266.h> |
| 60 | + #define BLYNK_HARDWARE_PORT 8080 |
| 61 | + #endif |
| 62 | +#endif |
| 63 | + |
| 64 | +#if !USE_BLYNK_WM |
| 65 | + #define USE_LOCAL_SERVER true |
| 66 | + |
| 67 | + // If local server |
| 68 | + #if USE_LOCAL_SERVER |
| 69 | + char blynk_server[] = "yourname.duckdns.org"; |
| 70 | + //char blynk_server[] = "192.168.2.110"; |
| 71 | + #else |
| 72 | + char blynk_server[] = ""; |
| 73 | + #endif |
| 74 | + |
| 75 | +char auth[] = "***"; |
| 76 | +char ssid[] = "***"; |
| 77 | +char pass[] = "***"; |
| 78 | + |
| 79 | +#endif |
| 80 | + |
| 81 | +#define DEBOUNCE_TIME 25 |
| 82 | +#define LONG_BUTTON_PRESS_TIME_MS 100 |
| 83 | +#define DEBUG_ISR 0 |
| 84 | + |
| 85 | +#define VPIN V1 |
| 86 | +#define LAMPSTATE_PIN V2 |
| 87 | + |
| 88 | +//Blynk Color in format #RRGGBB |
| 89 | +#define BLYNK_GREEN "#23C48E" |
| 90 | +#define BLYNK_RED "#D3435C" |
| 91 | + |
| 92 | +WidgetLED LampStatus(LAMPSTATE_PIN); |
| 93 | + |
| 94 | +volatile unsigned long lastDebounceTime = 0; |
| 95 | +volatile bool buttonPressed = false; |
| 96 | +volatile bool alreadyTriggered = false; |
| 97 | + |
| 98 | +volatile bool LampState = false; |
| 99 | +volatile bool SwitchReset = true; |
| 100 | + |
| 101 | +#define RELAY_PIN D1 |
| 102 | +#define BUTTON_PIN D3 |
| 103 | + |
| 104 | +BlynkTimer Timer; |
| 105 | + |
| 106 | +unsigned int myWiFiTimeout = 3200L; // 3.2s WiFi connection timeout (WCT) |
| 107 | +unsigned int buttonInterval = 511L; // 0.5s update button state |
| 108 | + |
| 109 | +void ICACHE_RAM_ATTR Falling(); |
| 110 | +void ICACHE_RAM_ATTR Rising(); |
| 111 | + |
| 112 | +void ICACHE_RAM_ATTR lightOn(); |
| 113 | +void ICACHE_RAM_ATTR lightOff(); |
| 114 | +void ICACHE_RAM_ATTR ButtonCheck(); |
| 115 | +void ICACHE_RAM_ATTR ToggleRelay(); |
| 116 | + |
| 117 | +BLYNK_CONNECTED() |
| 118 | +{ |
| 119 | + LampStatus.on(); |
| 120 | + Blynk.setProperty(LAMPSTATE_PIN, "color", LampState? BLYNK_RED : BLYNK_GREEN ); |
| 121 | + Blynk.syncVirtual(VPIN); |
| 122 | +} |
| 123 | + |
| 124 | +// Make this a autoreleased pushbutton |
| 125 | +BLYNK_WRITE(VPIN) |
| 126 | +{ |
| 127 | + if (param.asInt()) |
| 128 | + ToggleRelay(); |
| 129 | +} |
| 130 | + |
| 131 | +void ICACHE_RAM_ATTR Rising() |
| 132 | +{ |
| 133 | + unsigned long currentTime = millis(); |
| 134 | + unsigned long TimeDiff; |
| 135 | + |
| 136 | + TimeDiff = currentTime - lastDebounceTime; |
| 137 | + if ( digitalRead(BUTTON_PIN) && (TimeDiff > DEBOUNCE_TIME) ) |
| 138 | + { |
| 139 | + buttonPressed = false; |
| 140 | + ButtonCheck(); |
| 141 | + lastDebounceTime = currentTime; |
| 142 | + attachInterrupt(digitalPinToInterrupt(BUTTON_PIN), Falling, FALLING); |
| 143 | + } |
| 144 | +} |
| 145 | + |
| 146 | +void ICACHE_RAM_ATTR Falling() |
| 147 | +{ |
| 148 | + unsigned long currentTime = millis(); |
| 149 | + |
| 150 | + if ( !digitalRead(BUTTON_PIN) && (currentTime > lastDebounceTime + DEBOUNCE_TIME)) |
| 151 | + { |
| 152 | + lastDebounceTime = currentTime; |
| 153 | + ButtonCheck(); |
| 154 | + buttonPressed = true; |
| 155 | + attachInterrupt(digitalPinToInterrupt(BUTTON_PIN), Rising, RISING); |
| 156 | + } |
| 157 | +} |
| 158 | + |
| 159 | +void heartBeatPrint(void) |
| 160 | +{ |
| 161 | + static int num = 1; |
| 162 | + |
| 163 | + Serial.print("B"); |
| 164 | + if (num == 80) |
| 165 | + { |
| 166 | + Serial.println(); |
| 167 | + num = 1; |
| 168 | + } |
| 169 | + else if (num++ % 10 == 0) |
| 170 | + { |
| 171 | + Serial.print(" "); |
| 172 | + } |
| 173 | +} |
| 174 | + |
| 175 | +void checkButton() |
| 176 | +{ |
| 177 | + heartBeatPrint(); |
| 178 | + |
| 179 | + if (LampState) |
| 180 | + Blynk.setProperty(LAMPSTATE_PIN, "color", BLYNK_RED); |
| 181 | + else |
| 182 | + Blynk.setProperty(LAMPSTATE_PIN, "color", BLYNK_GREEN); |
| 183 | +} |
| 184 | + |
| 185 | +void ICACHE_RAM_ATTR ButtonCheck() |
| 186 | +{ |
| 187 | + boolean SwitchState = (digitalRead(BUTTON_PIN)); |
| 188 | + |
| 189 | + if (!SwitchState && SwitchReset) |
| 190 | + { |
| 191 | + ToggleRelay(); |
| 192 | + SwitchReset = false; |
| 193 | + } |
| 194 | + else if (SwitchState) |
| 195 | + { |
| 196 | + SwitchReset = true; |
| 197 | + } |
| 198 | +} |
| 199 | + |
| 200 | +void ICACHE_RAM_ATTR ToggleRelay() |
| 201 | +{ |
| 202 | + if (LampState) |
| 203 | + lightOff(); |
| 204 | + else |
| 205 | + lightOn(); |
| 206 | +} |
| 207 | + |
| 208 | +void ICACHE_RAM_ATTR lightOn() |
| 209 | +{ |
| 210 | + digitalWrite(RELAY_PIN, HIGH); |
| 211 | + LampState = true; |
| 212 | +} |
| 213 | + |
| 214 | +void ICACHE_RAM_ATTR lightOff() |
| 215 | +{ |
| 216 | + digitalWrite(RELAY_PIN, LOW); |
| 217 | + LampState = false; |
| 218 | +} |
| 219 | + |
| 220 | +void setup() |
| 221 | +{ |
| 222 | + Serial.begin(115200); |
| 223 | + |
| 224 | + pinMode(RELAY_PIN, OUTPUT); |
| 225 | + pinMode(BUTTON_PIN, INPUT_PULLUP); |
| 226 | + |
| 227 | + digitalWrite(RELAY_PIN, LOW); |
| 228 | + LampState = false; |
| 229 | + |
| 230 | + attachInterrupt(digitalPinToInterrupt(BUTTON_PIN), Falling, FALLING); |
| 231 | + |
| 232 | + #if USE_BLYNK_WM |
| 233 | + Blynk.begin(); |
| 234 | + #else |
| 235 | + unsigned long startWiFi = millis(); |
| 236 | + |
| 237 | + WiFi.begin(ssid, pass); |
| 238 | + |
| 239 | + do |
| 240 | + { |
| 241 | + delay(200); |
| 242 | + if ( (WiFi.status() == WL_CONNECTED) || (millis() > startWiFi + myWiFiTimeout) ) |
| 243 | + break; |
| 244 | + } while (WiFi.status() != WL_CONNECTED); |
| 245 | + |
| 246 | + Blynk.config(auth, blynk_server, BLYNK_HARDWARE_PORT); |
| 247 | + Blynk.connect(); |
| 248 | + |
| 249 | + if (Blynk.connected()) |
| 250 | + Serial.println("Blynk connected"); |
| 251 | + else |
| 252 | + Serial.println("Blynk not connected yet"); |
| 253 | + #endif |
| 254 | + |
| 255 | + Timer.setInterval(buttonInterval, checkButton); |
| 256 | +} |
| 257 | + |
| 258 | +void loop() |
| 259 | +{ |
| 260 | + Blynk.run(); |
| 261 | + Timer.run(); |
| 262 | +} |
| 263 | + |
0 commit comments