constants.py

# IRQ numbers
SYSTICK_IRQ = 15
EXTI_IRQ_BASE = 16

# HAL constants
# STM32F4
STM32F4_HAL_OK = 0
STM32F4_HAL_ERROR = 1

# Arduino
INPUT = 0
OUTPUT = 1
INPUT_PULLUP = 2
INPUT_PULLDOWN = 3
OUTPUT_OPENDRAIN = 4

# RIOT OS
RIOT_SCHED_PRIO_LEVELS = 16