Its possible to change config pinMode in Loop?

Projects Programming
1

I have a situation, I need to change pinMode, OUTPUT to INPUT

I have 2 ports, example:

int BL = 6;
int LA = 7;
void loop() {
pinMode(LA, OUTPUT);
pinMode(BL, INPUT_PULLUP);}

But after the initial teste with config above, need to change to

pinMode(LA, INPUT_PULLUP);
pinMode(BL, OUTPUT);}

Of course, the code I'snt complete above, just illustration.

Its possible?

2

Sure, but most times the initialisation tests would be done in setup()

3

Yes.

It's e.g. used in bit-banged I2C where the data pin needs to be output (when sending address / data to a slave) and input (when receiving data from a slave).

4

pinMode can be used anywhere - it's just most often used in setup(), since the majority of applications do not require changing it after initialization.

5

What happened when you tried?

6

Thank you for all. I have this code:

Depend the initial test connected, the system choice a CASE, this case, in the CASE 1, and in the CASE 1, follow the setup the pin need to change, but the system see just the first setup pin, in out the CASE 1 permanent, how can I do this?

Undestanding:
First a test in pin MA output, depend the result 1 or 0 in other pin, the system do another test, but need to change the pinmode, You understood my idea?

if (botao_estado == 1) {
pinMode(MA, OUTPUT);
pinMode(BM, INPUT_PULLUP);
pinMode(LA, INPUT_PULLUP);
pinMode(BL, INPUT_PULLUP);
pinMode(BA, INPUT_PULLUP);
pinMode(VD, INPUT_PULLUP);
pinMode(BV, INPUT_PULLUP);

int stat_BM = digitalRead(BM);
int stat_BL = digitalRead(BL);
int stat_BA = digitalRead(BA);
int stat_BV = digitalRead(BV);
int stat_LA = digitalRead(LA);
int stat_VD = digitalRead(VD);

if (stat_BM <= 0) {
PADCAB = '1';
}
else if (stat_BL <= 0) {
PADCAB = '2';
}
else if (stat_BA <= 0) {
PADCAB = '3';
}
else if (stat_BV <= 0) {
PADCAB = '4';
}
else if (stat_LA <= 0) {
PADCAB = '5';
}
else if (stat_VD <= 0) {
PADCAB = '6';
}
else {
PADCAB = 'X';
Serial.println("ERRO: Cabo nao conectado, verifique!");
}
}

//PAC+CAB Padrao do cabo A ou B / CAB 1, 2, 3, 4, 5 ou 6
switch (PADCAB) {
case '1':
Serial.println("Testando Cabo 1");
pinMode(MA, OUTPUT);
pinMode(BM, INPUT_PULLUP);
pinMode(LA, OUTPUT);
pinMode(BL, INPUT_PULLUP);
pinMode(AZ, OUTPUT);
pinMode(BA, INPUT_PULLUP);
pinMode(VD, OUTPUT);
pinMode(BV, INPUT_PULLUP);

int stat_BM = digitalRead(BM);//0
int stat_BL = digitalRead(BL);//1
int stat_BA = digitalRead(BA);//0
int stat_BV = digitalRead(BV);//1

Serial.println(digitalRead(BM));
Serial.println(digitalRead(BL));
Serial.println(digitalRead(BA));
Serial.println(digitalRead(BV));

if (stat_BM == 0 && stat_BL == 0 && stat_BA == 0 && stat_BV == 0) {
Serial.println("Cabo 1 - OK!");
}
else {
Serial.println("Cabo 1 - ERRO!");
}
break;