#include <Arduino.h>

#include "pca95xx.h"

void setup()
{
    pca95xx_configure(0x73, 0x0F, 0x0F);
}

void loop()
{ 
    pca95xx_out(0x73, pca95xx_in(0x73) << 4);
    delay(200);
}
PCA9538Breakout
SR
SR
SR
SR

ERC Warnings

flop1:S: Input pin not driven
flop2:S: Input pin not driven
flop3:S: Input pin not driven
flop4:S: Input pin not driven
flop1:CLK: Clock driven by combinatorial logic
flop2:CLK: Clock driven by combinatorial logic
flop3:CLK: Clock driven by combinatorial logic
flop4:CLK: Clock driven by combinatorial logic