苦苦挣扎的按钮编码 [英] Struggling coding with buttons
问题描述
我最近一直在为一个问题而苦苦挣扎.
问题是我无法找到一种方法来使一个按钮在8x8显示器上触发一个序列10秒钟然后熄灭,并且还没有另一个按钮使另一个序列在10秒内触发另一个序列然后熄灭,依此类推./p>
如果有人可以帮助我,请回答,将不胜感激:)
这是代码:
const int buttonPin = 3
int button = 0;
long now = 0;
setup(){
pinMode(buttonPin, INPUT);
}
loop(){
button = digitalRead(buttonPin);
if(button==HIGH){
lc.setRow(0, 0, B00000000);
lc.setRow(0, 1, B00011000);
lc.setRow(0, 2, B00100100);
lc.setRow(0, 3, B01011010);
lc.setRow(0, 4, B10011001);
lc.setRow(0, 5, B10000001);
lc.setRow(0, 6, B11111111);
lc.setRow(0, 7, B00000000);
delay(110);
now = millis();
}
delay(50);
if(millis()>now + 10000){
lc.setRow(0, 0, B00000000);
lc.setRow(0, 1, B00000000);
lc.setRow(0, 2, B00100100);
lc.setRow(0, 3, B01011010);
lc.setRow(0, 4, B10011001);
lc.setRow(0, 5, B10000001);
lc.setRow(0, 6, B11111111);
lc.setRow(0, 7, B00000000);
delay(110);
}
}
这是我从老师那里得到的帮助表,但我无法理解:
感谢马特
问题是delay(50);
.在这50毫秒内,arduino不会检查输入引脚,这很可能是在您按下按钮时出现的.您可以在按下按钮时附加中断功能( https://www.arduino.cc/reference/zh-CN/language/functions/external-interrupts/attachinterrupt/).或者,您可以尝试像这样的循环延迟:
unsigned int startTime = millis();
unsigned int currentTime = startTime;
while(currentTime - startTime >= 50) {
// check button state
currentTime = millis();
}
https://www.arduino.cc/en/Tutorial/StateChangeDetection
根据您发布的代码,您似乎根本不需要delay(50);
.
Ive been really struggling recently with one problem.
The problem is that I cannot find a way to make one button trigger one sequence on an 8x8 display for 10 seconds and go off AND also have another button to make a different sequence for 10 seconds then go off and so on.
If anyone can help me please respond, it would be much appreciated :)
Here is the CODE:
const int buttonPin = 3
int button = 0;
long now = 0;
setup(){
pinMode(buttonPin, INPUT);
}
loop(){
button = digitalRead(buttonPin);
if(button==HIGH){
lc.setRow(0, 0, B00000000);
lc.setRow(0, 1, B00011000);
lc.setRow(0, 2, B00100100);
lc.setRow(0, 3, B01011010);
lc.setRow(0, 4, B10011001);
lc.setRow(0, 5, B10000001);
lc.setRow(0, 6, B11111111);
lc.setRow(0, 7, B00000000);
delay(110);
now = millis();
}
delay(50);
if(millis()>now + 10000){
lc.setRow(0, 0, B00000000);
lc.setRow(0, 1, B00000000);
lc.setRow(0, 2, B00100100);
lc.setRow(0, 3, B01011010);
lc.setRow(0, 4, B10011001);
lc.setRow(0, 5, B10000001);
lc.setRow(0, 6, B11111111);
lc.setRow(0, 7, B00000000);
delay(110);
}
}
Here is the help sheet i got from my tutor but i cant get my head around it:
Thanks Matt
The problem is delay(50);
. The arduino does not check the input pins during these 50 milliseconds, and it's likely when you are pressing a button. You can either attach an interrupt function when the button is pressed (https://www.arduino.cc/reference/en/language/functions/external-interrupts/attachinterrupt/). Or you could try a looped delay like so:
unsigned int startTime = millis();
unsigned int currentTime = startTime;
while(currentTime - startTime >= 50) {
// check button state
currentTime = millis();
}
https://www.arduino.cc/en/Tutorial/StateChangeDetection
From the code you posted it appears you don't need delay(50);
at all.
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