146 lines
4.8 KiB
Python
146 lines
4.8 KiB
Python
import network
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import usocket as socket
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import ustruct
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import time
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import machine
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import urequests
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from machine import Pin, I2S
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import ubinascii
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import urandom
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# I2S 引脚配置
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BCLK_PIN = 13
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WS_PIN = 12
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SD_PIN = 14
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# 增益控制引脚
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GAIN_PIN = 15
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# 初始 I2S 配置，后续根据文件实际参数调整
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SAMPLE_RATE = 16000
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BITS_PER_SAMPLE = 16 # 修改为 16 位
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CHANNELS = 2
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BUFFER_SIZE = 8192
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# 初始化I2S配置（用于音频输出）
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def init_i2s():
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global BCLK_PIN, WS_PIN, SD_PIN, GAIN_PIN, SAMPLE_RATE, BITS_PER_SAMPLE, CHANNELS, BUFFER_SIZE
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gain_pin = machine.Pin(GAIN_PIN, machine.Pin.OUT)
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gain_pin.value(1)
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# 使用GPIO14 (BCLK), GPIO15 (LRC), GPIO32 (DIN)
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i2s = I2S(0,
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sck=Pin(BCLK_PIN), # Serial clock output
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ws=Pin(WS_PIN), # Word clock output
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sd=Pin(SD_PIN), # Serial data output
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mode=I2S.TX, # 使用发送模式
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bits=BITS_PER_SAMPLE, # 修改为 16 位数据
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format=I2S.MONO if CHANNELS == 1 else I2S.STEREO, # 修正声道判断逻辑
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rate=SAMPLE_RATE, # 采样率
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ibuf=BUFFER_SIZE) # 输入缓冲区大小
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return i2s
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class InterphoneHandler:
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def new_voice(self, data):
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print(f"[Interphone] 接收到新数据: {data}")
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i2s = init_i2s()
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url = "http://iot.julecn.com/interphone/get_voice?name=" + data['name'] # 替换为音频文件的URL
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print(url)
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self.play_audio_stream(i2s, url)
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def play_wav_file(self, data):
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try:
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# 要播放的本地 WAV 文件
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WAV_FILE = data['file']
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# 初始化 I2S 接口
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audio_out = init_i2s()
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# 打开 WAV 文件
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with open(WAV_FILE, 'rb') as f:
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# 跳过 WAV 文件头部（通常为 44 字节）
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f.seek(44)
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while True:
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# 读取音频数据块
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data = f.read(BUFFER_SIZE)
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if len(data) == 0:
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break
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# 将音频数据写入 I2S 接口
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print('将音频数据写入 I2S 接口')
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audio_out.write(data)
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except Exception as e:
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print(f"播放音频时出错: {e}")
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finally:
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if 'audio_out' in locals():
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audio_out.deinit()
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def play_audio_stream(self, i2s, url):
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try:
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# 添加请求头信息
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headers = {
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'User-Agent': 'MicroPython v1.0.0'
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}
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# 发送 HTTP 请求，获取流式响应
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response = urequests.get(url, headers=headers, stream=True)
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# 检查响应状态码
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if response.status_code != 200:
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print(f"请求失败，状态码: {response.status_code}")
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response.close()
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return
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# 解析 WAV 头部
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header = response.raw.read(44)
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if len(header) != 44 or header[0:4] != b'RIFF' or header[8:12] != b'WAVE' or header[12:16] != b'fmt ':
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print(header)
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raise ValueError("Not a valid WAV file")
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# 提取采样率、位深、声道数
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global SAMPLE_RATE, BITS_PER_SAMPLE, CHANNELS
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SAMPLE_RATE = int.from_bytes(header[24:28], 'little')
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BITS_PER_SAMPLE = int.from_bytes(header[34:36], 'little')
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CHANNELS = int.from_bytes(header[22:24], 'little')
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# 重新初始化 I2S 输出
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audio_out = init_i2s()
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# 开始流式播放
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chunk_size = 1024
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while True:
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chunk = response.raw.read(chunk_size)
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if not chunk:
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break
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audio_out.write(chunk)
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except Exception as e:
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print("Playback error:", e)
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finally:
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if 'audio_out' in locals():
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audio_out.deinit()
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if 'response' in locals():
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response.close()
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def stream_and_play(self, data):
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i2s = init_i2s()
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url = "http://iot.julecn.com/interphone/get_voice?name=" + data['name'] # 替换为音频文件的URL
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print(url)
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self.play_audio_stream(i2s, url)
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def generate_random_hex():
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# 初始化一个空的字节数组，用于存储随机字节
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random_bytes = bytearray()
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# 循环 4 次，每次生成 32 位（4 字节）的随机数
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for _ in range(4):
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# 生成 32 位随机数
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rand_32_bits = urandom.getrandbits(32)
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# 将 32 位随机数转换为 4 字节，并添加到字节数组中
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random_bytes.extend(rand_32_bits.to_bytes(4, 'big'))
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# 将随机字节转换为十六进制字符串
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hex_string = ubinascii.hexlify(random_bytes).decode()
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return hex_string
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