With this kind of a very general program below
if (digitalRead(22) == LOW)
{
digitalWrite(LedPin01,HIGH);
delay(100);
while(digitalRead(22) == LOW);
}
If I want to disable the part
while(digitalRead(22) == LOW);
I ll simply place a // before it to make this like
//while(digitalRead(22) == LOW);
To do this process I need to open IDE and need to open the program and need to make changes and then need to upload
Suppose I want to do it with any other GPIO Pin like PIn 48 or Pin 49 or any with a one press on Push button
Is this kind of rare stuff possible ???
Of course. Once you learn how to program stuff like that is simple.
bool someVariable = false;
.
.
.
if (someVariable == true) {
doWhatever();
}
Then collect the pushbutton event to set someVariabke true or false.
HTH
a7
Ya Sir Learning is IMP to really program those stuff and I am on basics
OK I ll try with this
Any Reference page to Learn this ??
I am sure you have some learning style, and that there must be teachers on the internet who will speak to that.
A good way to improve is to read these fora, especially read the code carefully to see how it does whatever it is doing. Or why it does not.Does not compile, or perhaps does not yet function correctly.
There are many simple examples available in the IDE. Start wherever you feel uncomfortable, get out examples and read them, run them and ask questions here or google for things you don't understand yet.
Surely you know what you need to about if statements…
a7
On this basis I prepared this
const int IN2 = 2;
const int IN3 = 3;
boolean readValue2 ;
boolean readValue3 ;
const byte LedPin12 = 12;
bool pause = false;
void setup() {
// put your setup code here, to run once:
pinMode (IN2, INPUT_PULLUP);
pinMode (IN3, INPUT_PULLUP);
pinMode (LedPin12, OUTPUT);
digitalWrite(LedPin12, LOW);
}
void loop()
{
if (digitalRead(IN2)==0)
{
digitalWrite(LedPin12,1);
delay(400);
digitalWrite(LedPin12,0);
delay(400);
if (digitalRead(IN3)==0)
{
while(digitalRead(IN2)==0);
delay(100);
}
else
{
//while(digitalRead(IN2)==0);
//delay(100);
}
}
}
But here PIN 3 just cancels the while part permanently even after releasing the button
What would be the inverse of while part !!
gcjr
November 5, 2022, 11:03pm
7
can you explain the application for this
along these lines, but needing changes for this application, consider
// pcRead - debugging using serial monitor
const char version [] = "PcRead 201114a";
int debug = 0;
// ---------------------------------------------------------
// toggle output bit
int
readString (
char *s,
int maxChar )
{
int n = 0;
Serial.print ("> ");
do {
if (Serial.available()) {
int c = Serial.read ();
if ('\n' == c)
break;
s [n++] = c;
if (maxChar == n)
break;
}
} while (true);
return n;
}
// -----------------------------------------------------------------------------
// process single character commands from the PC
#define MAX_CHAR 10
char s [MAX_CHAR] = {};
int analogPin = 0;
void
pcRead (void)
{
static int val = 0;
if (Serial.available()) {
int c = Serial.read ();
switch (c) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
val = c - '0' + (10 * val);
break;
case 'A':
analogPin = val;
Serial.print ("analogPin = ");
Serial.println (val);
val = 0;
break;
case 'D':
debug ^= 1;
break;
case 'I':
pinMode (val, INPUT);
Serial.print ("pinMode ");
Serial.print (val);
Serial.println (" INPUT");
val = 0;
break;
case 'O':
pinMode (val, OUTPUT);
Serial.print ("pinMode ");
Serial.print (val);
Serial.println (" OUTPUT");
val = 0;
break;
case 'P':
pinMode (val, INPUT_PULLUP);
Serial.print ("pinMode ");
Serial.print (val);
Serial.println (" INPUT_PULLUP");
val = 0;
break;
case 'a':
Serial.print ("analogRead: ");
Serial.println (analogRead (val));
val = 0;
break;
case 'c':
digitalWrite (val, LOW);
Serial.print ("digitalWrite: LOW ");
Serial.println (val);
val = 0;
break;
case 'p':
#if !defined(ARDUINO_ARCH_ESP32)
analogWrite (analogPin, val);
Serial.print ("analogWrite: pin ");
Serial.print (analogPin);
Serial.print (", ");
Serial.println (val);
val = 0;
#endif
break;
case 'r':
Serial.print ("digitalRead: pin ");
Serial.print (val);
Serial.print (", ");
Serial.println (digitalRead (val));
val = 0;
break;
case 's':
digitalWrite (val, HIGH);
Serial.print ("digitalWrite: HIGH ");
Serial.println (val);
val = 0;
break;
case 't':
Serial.print ("pinToggle ");
Serial.println (val);
digitalWrite (val, ! digitalRead (val));
val = 0;
break;
case 'v':
Serial.print ("\nversion: ");
Serial.println (version);
break;
case '\n': // ignore
break;
case '"':
while ('\n' != Serial.read ()) // discard linefeed
;
readString (s, MAX_CHAR-1);
Serial.println (s);
break;
case '?':
Serial.println ("\npcRead:\n");
Serial.println (" [0-9] append to #");
Serial.println (" A # - set analog pin #");
Serial.println (" D # - set debug to #");
Serial.println (" I # - set pin # to INPUT");
Serial.println (" O # - set pin # to OUTPUT");
Serial.println (" P # - set pin # to INPUT_PULLUP");
Serial.println (" a # - analogRead (pin #)");
Serial.println (" c # - digitalWrite (pin #, LOW)");
Serial.println (" p # -- analogWrite (analogPin, #)");
Serial.println (" r # - digitalRead (pin #)");
Serial.println (" s - digitalWrite (pin #, HIGH)");
Serial.println (" t -- toggle pin # output");
Serial.println (" v - print version");
Serial.println (" \" - read string");
Serial.println (" ? - list of commands");
break;
default:
Serial.print ("unknown char ");
Serial.println (c,HEX);
break;
}
}
}
// -----------------------------------------------------------------------------
void
loop (void)
{
pcRead ();
}
// -----------------------------------------------------------------------------
void
setup (void)
{
Serial.begin(115200);
Serial.println (version);
#if defined(ARDUINO_ARCH_ESP32)
Serial.println ("esp32");
#endif
}
@Raj_enters_learning_programming ,
I looked up your statistics
You are asking pretty basic questions. I assume you jumped from project to project always just learning enough to make it work somehow. Without really understanding.
You have done this now for 45 topics.
Arduino Programming Course
It is easy to understand and has a good mixture between explaining important concepts and example-codes to get you going. So give it a try and report your opinion about this tutorial.
Learning with such a tutorial is like building a racecar from a Kit.
That is the difference between stumpbling along the path with a lot of programming hints from the forum (the jogger) compared to learning to programm - which of course takes time and then progressing very fast.
About your question I haven't understood what you want to do with this code.normal words. It will be easier to understand
best regards Stefan
2 Likes
alto777
November 5, 2022, 11:08pm
9
But did you mean this
which I point out is a complete while statement that does... absolutely nothing. Probably guessing that's not what you intended.
What would be the inverse of while part !!
What are you trying to do? How can you tell if it is doing what you want or not?
Create a simpler example. It's just an if statement letting or not letting a while loop run. Reread the responses above.
if (digitalRead(controlPin) == LOW)
while ( <whatver> ) {
// code in here will execute only if the *controlPin* is reading LOW.
}
HTH
a7
system
May 4, 2023, 11:08pm
10
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