我有下面的代码,我需要快速执行,但它花了很多时间来改变值,无论如何,这使得这项任务的方式更快?Arduino readString();代码运行缓慢
我使用indexOf()
和substring()
来完成这个任务。 这是用于更改条形LED颜色。
// declare LED Series A Pins R-G-B (PWM Pins)
int const AledRedPin = 6;
int const AledGreenPin = 5;
int const AledBluePin = 3;
// declare LED Series B Pins R-G-B (PWM Pins)
int const BledRedPin = 10;
int const BledGreenPin = 11;
int const BledBluePin = 9;
// serial input variable & string
// initialise LED Series A Pins R-G-B (PWN Value: 0 to 255)
// initial value = 255
int AledRed = 255;
int AledGreen = 255;
int AledBlue = 255;
// initialise LED Series A Pins R-G-B (PWN Value: 0 to 255)
// initial value = 255
int BledRed = 255;
int BledGreen = 255;
int BledBlue = 255;
//serial input
String Command = "";
//string manipulation
int cmdindexval = 0;
String CommandType = "";
int CommandValue = 0;
String Series = "";
void setup() {
// put your setup code here, to run once:
// start serial
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB
}
// set LED Series A Pins as Output R-G-B
pinMode(AledRedPin, OUTPUT);
pinMode(AledGreenPin, OUTPUT);
pinMode(AledBluePin, OUTPUT);
// set LED Series B Pins as Output R-G-B
pinMode(BledRedPin, OUTPUT);
pinMode(BledGreenPin, OUTPUT);
pinMode(BledBluePin, OUTPUT);
}
void loop() {
// put your main code here, to run repeatedly:
// read from serial if it's available
if (Serial.available() > 0) {
Command = Serial.readString(); //read string from serial monitor
cmdindexval = Command.indexOf('='); //read characters until '=' then assign the value
CommandType = Command.substring(0, cmdindexval); //assign the value from 0 to cmdindexval
//Series = Command.substring(0, 1); //read first character
CommandValue = Command.substring(cmdindexval + 1).toInt(); //assign the value after '=' and convert string to Int
Serial.println(CommandType + " ,is equal to " + CommandValue + " ,Series: " + Series);
//if (Series == "A") {
if (CommandType == "ACledRed"){
AledRed = CommandValue;
}
else if (CommandType == "ACledGreen"){
AledGreen = CommandValue;
}
else if (CommandType == "ACledRedBlue") {
AledBlue = CommandValue;
}
//}
//else if (Series == "B") {
if (CommandType == "BCledRed") {
BledRed = CommandValue;
}
else if (CommandType == "BCledGreen") {
BledGreen = CommandValue;
}
else if (CommandType == "BCledBlue") {
BledBlue = CommandValue;
}
//}
} //end serial
analogWrite(AledRedPin, AledRed);
analogWrite(AledGreenPin, AledGreen);
analogWrite(AledBluePin, AledBlue);
analogWrite(BledRedPin, BledRed);
analogWrite(BledGreenPin, BledGreen);
analogWrite(BledBluePin, BledBlue);
}
你确定'indexOf'很慢,而不是['readString'](https://www.arduino.cc/en/Serial/ReadString),它是基于超时的,默认超时是1秒? –
我不确定。 @gre_gor –