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ReSpeaker 2-Mics Pi HAT是专为AI和语音应用设计的Raspberry Pi双麦克风扩展板。
这是购买了比较久的主板，把它安装到了PiZeroW上。我在等着Pi0 2W，毕竟第一代的性能还是太差，做移动应用还是差了些。不过2代贵得不值，等着估计明年中旬就有供货正常，价格正常了。
这里作一个资料备份而已。官方资料地址
该板是基于WM8960开发的低功耗立体声编解码器。 电路板两侧有两个麦克风采集声音，还提供3个APA102 RGB LED，1个用户按钮和2个板载Grove接口，用于扩展应用程序。 此外，3.5mm音频插孔或JST 2.0扬声器输出均可用于音频输出。
- 确保您正在您的Pi上运行最新的Raspbian操作系统（debian 9），您可以用etcher进行系统烧录
- 驱动下载并安装
sudo apt-get update
sudo apt-get upgrade
git clone https://github.com/respeaker/seeed-voicecard.git
cd seeed-voicecard #下载声卡驱动
sudo ./install.sh --compat-kernel #安装声卡驱动
reboot #重启
- 检查声卡名称是否与源代码seeed-voicecard相匹配.
aplay -l
arecord -l
-
录音播放测试 arecord -f cd -Dhw:1 | aplay -Dhw:1
-
调节音量(可选) alsamixer
-
控制APA102 LED的示例
- 输入： `sudo raspi-config`;
- 选择 "Interfacing Options";
- 选择 "SPI";
- 选择 “Yes”
- 选择 “OK”
- 选择 “Finish”
- 运行LED示例
cd ~/
git clone https://github.com/respeaker/mic_hat.git
sudo pip install spidev #安装spi的驱动
cd mic_hat
python pixels.py
import apa102
import time
import threading
try:
import queue as Queue
except ImportError:
import Queue as Queue
class Pixels:
PIXELS_N = 3
def __init__(self):
self.basis = [0] * 3 * self.PIXELS_N
self.basis[0] = 2
self.basis[3] = 1
self.basis[4] = 1
self.basis[7] = 2
self.colors = [0] * 3 * self.PIXELS_N
self.dev = apa102.APA102(num_led=self.PIXELS_N)
self.next = threading.Event()
self.queue = Queue.Queue()
self.thread = threading.Thread(target=self._run)
self.thread.daemon = True
self.thread.start()
def wakeup(self, direction=0):
def f():
self._wakeup(direction)
self.next.set()
self.queue.put(f)
def listen(self):
self.next.set()
self.queue.put(self._listen)
def think(self):
self.next.set()
self.queue.put(self._think)
def speak(self):
self.next.set()
self.queue.put(self._speak)
def off(self):
self.next.set()
self.queue.put(self._off)
def _run(self):
while True:
func = self.queue.get()
func()
def _wakeup(self, direction=0):
for i in range(1, 25):
colors = [i * v for v in self.basis]
self.write(colors)
time.sleep(0.01)
self.colors = colors
def _listen(self):
for i in range(1, 25):
colors = [i * v for v in self.basis]
self.write(colors)
time.sleep(0.01)
self.colors = colors
def _think(self):
colors = self.colors
self.next.clear()
while not self.next.is_set():
colors = colors[3:] + colors[:3]
self.write(colors)
time.sleep(0.2)
t = 0.1
for i in range(0, 5):
colors = colors[3:] + colors[:3]
self.write([(v * (4 - i) / 4) for v in colors])
time.sleep(t)
t /= 2
# time.sleep(0.5)
self.colors = colors
def _speak(self):
colors = self.colors
gradient = -1
position = 24
self.next.clear()
while not self.next.is_set():
position += gradient
self.write([(v * position / 24) for v in colors])
if position == 24 or position == 4:
gradient = -gradient
time.sleep(0.2)
else:
time.sleep(0.01)
while position > 0:
position -= 1
self.write([(v * position / 24) for v in colors])
time.sleep(0.01)
# self._off()
def _off(self):
self.write([0] * 3 * self.PIXELS_N)
def write(self, colors):
for i in range(self.PIXELS_N):
self.dev.set_pixel(i, int(colors[3*i]), int(colors[3*i + 1]), int(colors[3*i + 2]))
self.dev.show()
pixels = Pixels()
if __name__ == '__main__':
while True:
try:
pixels.wakeup()
time.sleep(3)
pixels.think()
time.sleep(3)
pixels.speak()
time.sleep(3)
pixels.off()
time.sleep(3)
except KeyboardInterrupt:
break
pixels.off()
time.sleep(1)
- 使用用户自定义按钮
sudo pip install rpi.gpio // install RPi.GPIO library
nano button.py // copy the following code in button.py
import RPi.GPIO as GPIO
import time
BUTTON = 17
GPIO.setmode(GPIO.BCM)
GPIO.setup(BUTTON, GPIO.IN)
while True:
state = GPIO.input(BUTTON)
if state:
print("off")
else:
print("on")
time.sleep(1)