DE10 Nano LED / Key demo

led.py

from mmap import mmap
import time
import struct

LWFPGASLVS_OFST = 0xFF200000
LED_PIO_BASE = 0x3000
LED_SPAN = 0x10
KEY_BASE = 0x5000
KEY_SPAN = 0x10

counter = 0

with open("/dev/mem", "w+b") as f:
    led = mmap(f.fileno(), LED_SPAN, offset=(LWFPGASLVS_OFST + LED_PIO_BASE))
    key = mmap(f.fileno(), KEY_SPAN, offset=(LWFPGASLVS_OFST + KEY_BASE))
    while True:
        print(struct.unpack("<L", key[0:4])[0])
        if counter == 0x80:
            counter = 0
        else:
            counter += 1
        led[0:4] = struct.pack("<L", counter)
        time.sleep(0.005)