Example: 50-Arduino-Boards/Portenta-H7/50-Board-Control/dac_write_timed.py

# 本作品采用MIT许可证授权。
# 版权所有 (c) 2013-2023 OpenMV LLC。保留所有权利。
# https://github.com/openmv/openmv/blob/master/LICENSE
#
# DAC Timed Write Example
#
# This example shows how to use the DAC pin output onboard your OpenMV Cam.

import math
from pyb import DAC

# create a buffer containing a sine-wave
buf = bytearray(100)
for i in range(len(buf)):
    buf[i] = 128 + int(127 * math.sin(2 * math.pi * i / len(buf)))

# output the sine-wave at 400Hz
dac = DAC("P6")
dac.write_timed(buf, 400 * len(buf), mode=DAC.CIRCULAR)