from machine import DAC, Pin, reset
import time
dac = DAC(Pin(25))
wave = [
0x80, 0x83, 0x87, 0x8A, 0x8E, 0x91, 0x95, 0x98, 0x9B, 0x9E, 0xA2, 0xA5, 0xA7, 0xAA, 0xAD, 0xAF, 0xB2, 0xB4, 0xB6, 0xB8, 0xB9, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xBF, 0xBF,
0xC0, 0xBF, 0xBF, 0xBF, 0xBE, 0xBD, 0xBC, 0xBB, 0xB9, 0xB8, 0xB6, 0xB4, 0xB2, 0xAF, 0xAD, 0xAA, 0xA7, 0xA5, 0xA2, 0x9E, 0x9B, 0x98, 0x95, 0x91, 0x8E, 0x8A, 0x87, 0x83,
0x80, 0x7C, 0x78, 0x75, 0x71, 0x6E, 0x6A, 0x67, 0x64, 0x61, 0x5D, 0x5A, 0x58, 0x55, 0x52, 0x50, 0x4D, 0x4B, 0x49, 0x47, 0x46, 0x44, 0x43, 0x42, 0x41, 0x40, 0x40, 0x40,
0x40, 0x40, 0x40, 0x40, 0x41, 0x42, 0x43, 0x44, 0x46, 0x47, 0x49, 0x4B, 0x4D, 0x50, 0x52, 0x55, 0x58, 0x5A, 0x5D, 0x61, 0x64, 0x67, 0x6A, 0x6E, 0x71, 0x75, 0x78, 0x7C
]
delay_us = 5
try:
    while True:
        for value in wave:
            dac.write(value)
            time.sleep_us(delay_us)

except KeyboardInterrupt:
    print('Ctrl-C pressed...exiting')
    reset()