素描，响应某些命令，它怎么办？ [英] Sketch that responds to certain commands, how is it done?
问题描述
好吧，我必须在此刻完成了一半的Arduino草图。下面基本上草图将点亮LED上kegboard迷你盾，如果字符的字符串等于* {} blink_Flow_A *但是，LED只装上的Arduino当前草图闪烁一次。我会喜欢的Arduino反复闪烁，直至停止命令发送到Arduino。我最终想开一个阀门，直至阀门接收到关闭命令，然后关闭阀门保持打开状态。草图看起来像以下，
Alright I have a half complete Arduino sketch at the moment. Basically the sketch below will blink an LED on a kegboard-mini shield if a string of chars equals *{blink_Flow_A}* However the LED only blinks once with the current sketch loaded on the Arduino. I will like the Arduino to blink repeatedly until the "stop" command is sent to the Arduino. I would eventually like to open a valve, keep it open until the valve receives to the close command then close the valve. The sketch looks like the following,
/*
* kegboard-serial-simple-blink07
* This code is public domain
*
* This sketch sends a receives a multibyte String from the iPhone
* and performs functions on it.
*
* Examples:
* http://arduino.cc/en/Tutorial/SerialEvent
* http://arduino.cc/en/Serial/read
*/
// global variables should be identified with _
// flow_A LED
int led = 4;
// relay_A
const int RELAY_A = A0;
// variables from sketch example
String inputString = ""; // a string to hold incoming data
boolean stringComplete = false; // whether the string is complete
void setup() {
Serial.begin(2400); // open serial port, sets data rate to 2400bps
Serial.println("Power on test");
inputString.reserve(200);
pinMode(RELAY_A, OUTPUT);
}
void open_valve() {
digitalWrite(RELAY_A, HIGH); // turn RELAY_A on
}
void close_valve() {
digitalWrite(RELAY_A, LOW); // turn RELAY_A off
}
void flow_A_blink() {
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for one second
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
void flow_A_blink_stop() {
digitalWrite(led, LOW);
}
void loop() {
// print the string when newline arrives:
if (stringComplete) {
Serial.println(inputString);
// clear the string:
inputString = "";
stringComplete = false;
}
if (inputString == "{blink_Flow_A}") {
flow_A_blink();
}
}
//SerialEvent occurs whenever a new data comes in the
//hardware serial RX. This routine is run between each
//time loop() runs, so using delay inside loop can delay
//response. Multiple bytes of data may be available.
void serialEvent() {
while(Serial.available()) {
// get the new byte:
char inChar = (char)Serial.read();
// add it to the inputString:
inputString += inChar;
// if the incoming character is a newline, set a flag
// so the main loop can do something about it:
if (inChar == '\n') {
stringComplete = true;
}
}
}
如果它使IRC任何区别有人告诉我研究状态机的划痕头的
If it makes any difference someone on IRC told me to research state machines scratches head
推荐答案
一个状态机（在它的最简单的 - 它可以是很多更复杂）可能是只是一组条件语句（如/ else或开关/箱），其中你基于一个变量的状态某些行为，也改变变量的状态。因此，它可以被认为是处理或进展通过一系列的条件的一种方式。
A state machine (at it's simplest - it can be lots more complicated) can be just a set of conditional statements (if/else or switch/case) where you do certain behaviors based on the state of a variable, and also change that variable state. So it can be thought of as a way of handling or progressing through a series of conditions.
所以，你有你的LED /阀的状态 - 它要么是闪烁（开）或不闪烁（关闭）。在伪code位置：
So you have the state of your LED/valve - it is either blinking (open) or not blinking (closed). In pseudo code here:
boolean LED_state = false; //init to false/closed
void loop(){
if (checkForCorrectCommand() == true){ //
if (LED_State == false){
open_valve();
LED_State = true;
} else {
close_valve();
LED_State = false;
}
}
}
闪烁的LED部分应该很容易，如果你得到了code的主旨以上实现。在 checkForCorrectCommand（）位是你写检查功能，无论您输入 - 键，串口，按钮等它应该返回一个布尔
The blinking LED part should be easy to implement if you get the gist of the code above. The checkForCorrectCommand() bit is a function you write for checking whatever your input is - key, serial, button, etc. It should return a boolean.
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