不用 delay() 執行多個任務
如果你有多個任務以不同的間隔重複執行,請使用此示例作為起點:
unsigned long intervals[] = {250,2000}; //this defines the interval for each task in milliseconds
unsigned long last[] = {0,0}; //this records the last executed time for each task
void setup() {
pinMode(LED_BUILTIN, OUTPUT); //set the built-it led pin as output
Serial.begin(115200); //initialize serial
}
void loop() {
unsigned long now = millis();
if(now-last[0]>=intervals[0]){ last[0]=now; firstTask(); }
if(now-last[1]>=intervals[1]){ last[1]=now; secondTask(); }
//do other things here
}
void firstTask(){
//let's toggle the built-in led
digitalWrite(LED_BUILTIN, digitalRead(LED_BUILTIN)?0:1);
}
void secondTask(){
//say hello
Serial.println("hello from secondTask()");
}
要新增另一個每 15 秒執行一次的任務,請擴充套件變數 intervals
和 last
:
unsigned long intervals[] = {250,2000,15000};
unsigned long last[] = {0,0,0};
然後新增 if
語句來執行新任務。在這個例子中,我將其命名為 thirdTask
。
if(now-last[2]>=intervals[2]){ last[2]=now; thirdTask(); }
最後宣告函式:
void thirdTask(){
//your code here
}