Pin input and Pull-up

[settler]

Hello to all,

so I am trying to figure out why this is not working, but I am running out of ideas.
I have a few pins that must be set as input and must have pull up on them.
Here is how I did it, but it doesnt work:

for (i = 0; i < inc; i++) {
pinMode(inpin, INPUT);
digitalWrite(inpin, INPUT_PULLUP); // activate 20k pull-up

I have tried then just with one pin and its the same. I am using Blue pill STM32F103C8.

[stevestrong]

INPUT_PULLUP is a parameter for pinMode(), not for digitlWrite().

Code: Select all

pinMode(inpin, INPUT_PULLUP);
digitalWrite(inpin, HIGH); // use HIGH or LOW

[ag123]

it should be pinMode( pin, INPUT_PULLUP)

i used that successfully here
built in pull up resistor, DHT11, DHT22
viewtopic.php?f=7&t=530

[fpiSTM]

https://www.arduino.cc/reference/en/lan ... o/pinmode/


Anyway it seems strange to set a pin in input an do a write....

[settler]

Ohh, waw, looks i am really blind

Thanks for this, now it works