8种机械键盘轴体对比

本人程序员，要买一个写代码的键盘，请问红轴和茶轴怎么选？

参考：

配置：

喇叭：3.5音频口

麦克风：摄像头自带麦克风(Usb)

1. 安装需要的软件1

2sudo apt-get install python-pip mplayer flac python2.7-dev libcurl4-gnutls-dev

sudo pip install requests pycurl

2. 配置配置麦克风和音箱1

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10$ cat /proc/asound/cards

0 [ALSA ]: bcm2835 - bcm2835 ALSA

bcm2835 ALSA

1 [Camera ]: USB-Audio - USB 2.0 Camera

Sonix Technology Co., Ltd. USB 2.0 Camera at usb-3f980000.usb-1.2, high speed

$ cat /proc/asound/modules

0 snd_bcm2835

1 snd_usb_audio

第一个命令查看声卡是否存在

第二个命令应该是看声卡的驱动的

调整输入输出音频工具alsamixer：sudo alsamixer

3. 播放声音aplay make.wav

结果声音没有播放

网上查了，

By default output will be automatic (hdmi if hdmi supports audio, otherwise analogue). You can force it with:amixer cset numid=3 where n is 0=auto, 1=headphones, 2=hdmi.

If you have pulseaudio installed you need to also specify the card number:amixer -c 0 cset numid=3

所以运行amixer cset numid=3 1

就可以听到3.5输出了

4. 麦克风测试sudo arecord –duration=10 –device=plughw:1,0 –format=cd aaa.wav

指令中的’–device=plughw:1,0’ 选项指派特定的录音设备，而Raspberry Pi的内置音效设备是’plughw:0,0’

使用百度api进行语音播放：

5. 使用百度API进行语音识别和播放

测试取的token：1

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11import requests

import json

url = 'https://openapi.baidu.com/oauth/2.0/token'

payload = {'grant_type':'client_credentials',

'client_id':'ZEzwlE2gipnqoE3jqiCKN7SN',

'client_secret':'KOyWkyE57qWnDnFoc5afwIk0zBMw2X1p'}

r = requests.post(url,data=payload)

print json.loads(r.text)['access_token']

测试ok后，开始正式写：

大致思路：

将请求的token保存到文件中，然后读取文件中的accesstoken,判断token的日期是否有效，无效重新请求token。

代码：

app.py1

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131# -*- coding:utf8 -*-

import requests

import os

import json

import time

import uuid

import base64

class API(object):

def __init__(self):

dic = {

'hello':'欢迎使用语音播放',

'error':'识别错误',

}

for key in dic:

self.txt2audio(dic[key],key)

if key == 'hello':

self.play(key)

pass

def get_token(self):

token = None

if os.path.exists('token'):

file = open('token','r')

token = file.read()

file.close()

if json.loads(token)['expires'] < time.time():

token = self.req_token()

else:

print "load cache token"

pass

else:

token = self.req_token()

return json.loads(token)['access_token']

def req_token(self):

print "request new token"

token = None

url = 'https://openapi.baidu.com/oauth/2.0/token'

key = 'ZEzwlE2gipnqoE3jqiCKN7SN'

secret = 'KOyWkyE57qWnDnFoc5afwIk0zBMw2X1p'

payload = {'grant_type':'client_credentials',

'client_id':key,

'client_secret':secret}

r = requests.post(url,data=payload)

token = r.text

jtoken = json.loads(token)

jtoken['expires'] = jtoken['expires_in'] + time.time()

token = json.dumps(jtoken)

file = open('token','w')

file.write(token)

file.close()

return token

def txt2audio(self,txt,audio='tmp'):

access_token = self.get_token()

url = "http://tsn.baidu.com/text2audio"

payload = {

'tex':txt,

'lan':'zh',

'tok':access_token,

'ctp':1,

'cuid':uuid.UUID(int = uuid.getnode()).hex,

'spd':5,

'pit':8,

'vol':9,

'per':1,

}

r = requests.post(url,payload)

if r.headers['Content-Type'] == 'audio/mp3':

file = open(audio + '.mp3','w')

file.write(r.content)

file.close()

else:

self.play('error')

print r.text

pass

def audio2txt(self,file='rec'):

access_token = self.get_token()

url="http://vop.baidu.com/server_api"

self.txt2audio('请说:')

self.play('tmp')

os.system('arecord --duration=2 -c 1 --device=plughw:1,0 -f S16_LE -t wav -v --rate=16000 ' + file + '.wav')

f = open(file + '.wav','r')

sound = f.read()

f.close()

payload = {

'format':'wav',

'rate':16000,

'channel':1,

'cuid':uuid.UUID(int = uuid.getnode()).hex,

'token':access_token,

'lan':'zh',

'speech':base64.b64encode(sound),

'len':len(sound),

}

header = {'Content-Type':'application/json'}

r = requests.post(url,data=json.dumps(payload),headers=header)

print r.text

jret = json.loads(r.text)

if jret.has_key('result'):

ret = json.loads(r.text)['result'][0].split(',')[0]

else:

ret = ""

return ret

pass

def play(self,file='tmp'):

# can not play the mp3 by aplay

# os.system("aplay " + file + ".mp3")

os.system("mpg321 " + file + ".mp3")

pass

baidu.py1

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48# -*- coding:utf8 -*-

from baidu import API

import RPi.GPIO as GPIO

import time

import requests

import uuid

import json

pin = 13

GPIO.setmode(GPIO.BCM)

GPIO.setup(pin, GPIO.IN)

baidu = API()

# baidu.txt2audio("你好")

# baidu.play('tmp')

def get_tuling(text):

url='http://www.tuling123.com/openapi/api'

data={'key':'fa78fe2fbb85c914c7126d42bc7c3ebb','info':text,'userid':str(uuid.UUID(int = uuid.getnode()).hex,)}

r = requests.post(url,data=data)

ans = json.loads(r.text)

return ans

while True:

change = False

while GPIO.input(pin) == GPIO.LOW:

change = True

time.sleep(0.005)

if change == True:

#baidu.txt2audio('我听着,请说指令:')

text = baidu.audio2txt()

print text

if len(text) > 0:

rep = get_tuling(text)

rep = rep['text']

print rep

else:

rep = "我没有听清"

baidu.txt2audio(rep)

baidu.play()

change = False

time.sleep(1)

遇到坑：mp3格式只能通过mpg321播放

读取文件token = file.readlines()[0]，是一个列表，所以需要先取第一个再用json转。