[SOLVED] What pins are left untouched by this library?

1

Hello !

I need to use one GPIO for a button.

These are the ones that I use:

    #define R1_PIN  25
    #define G1_PIN  5
    #define B1_PIN  26
    #define R2_PIN  27
    #define G2_PIN  23
    #define B2_PIN  14

    #define A_PIN   13
    #define B_PIN   21
    #define C_PIN   18
    #define D_PIN   19
    #define E_PIN   22
    #define LAT_PIN 15
    #define OE_PIN  4

    #define CLK_PIN 2

    #define GPIO_PWM0A_OUT GPIO_NUM_32
    #define GPIO_SYNC0_IN  GPIO_NUM_34

Are there any hidden ones ?

I am asking because I’m experiencing a strange behavior with the button. It changes from HIGH to LOW randomly on startup and I can’t find a way of making it work.

2

There shouldn’t be any hidden ones.

Does the button work when you’re not using SmartMatrix Library? What about if you take out the call to matrix.begin()?

3

It was a mistake on my side. I was using GPIO 34 for the button even though it is used for something else:
#define GPIO_SYNC0_IN GPIO_NUM_34

I’ve changed it to GPIO 33 and it works just nice.