#ifndef CONFIG_H #define CONFIG_H // configuration file // define pico gpio pins used for controlling 74HC595 chips #define DATA_PIN 2 #define CLOCK_PIN 3 #define LATCH_PIN 4 #define LED_PIN 25 // define the order of 74HC595 chain #define CHIP_0 0 #define CHIP_1 8 #define CHIP_2 6 #define CHIP_3 4 #define CHIP_4 2 #define CHIP_5 1 #define CHIP_6 3 #define CHIP_7 5 #define CHIP_8 7 #endif