WiPy 的快速参考

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WiPy 的快速参考

以下是 CC3200/WiPy 的快速参考。如果这是您第一次使用该板，请考虑先阅读以下部分：

• 关于 WiPy 的一般信息
• WiPy 教程和示例
  

通用板控制（包括睡眠模式）

S查看machine模块：

1. import machine
   
2. 
   
3. help(machine) # display all members from the machine module
   
4. machine.freq() # get the CPU frequency
   
5. machine.unique_id() # return the 6-byte unique id of the board (the WiPy's MAC address)
   
6. 
   
7. machine.idle()        # average current decreases to (~12mA), any interrupts wake it up
   
8. machine.lightsleep()  # everything except for WLAN is powered down (~950uA avg. current)
   
9.                       # wakes from Pin, RTC or WLAN
   
10. machine.deepsleep()   # deepest sleep mode, MCU starts from reset. Wakes from Pin and RTC.

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引脚和 GPIO

参见 machine.Pin.

1. from machine import Pin
   
2. 
   
3. # initialize GP2 in gpio mode (alt=0) and make it an output
   
4. p_out = Pin('GP2', mode=Pin.OUT)
   
5. p_out.value(1)
   
6. p_out.value(0)
   
7. p_out.toggle()
   
8. p_out(True)
   
9. 
   
10. # make GP1 an input with the pull-up enabled
    
11. p_in = Pin('GP1', mode=Pin.IN, pull=Pin.PULL_UP)
    
12. p_in() # get value, 0 or 1

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计时器

请参阅 machine.TimerWiPy 和machine.Pin。Timerid的取值从 0 到 3。：

1. from machine import Timer
   
2. from machine import Pin
   
3. 
   
4. tim = Timer(0, mode=Timer.PERIODIC)
   
5. tim_a = tim.channel(Timer.A, freq=1000)
   
6. tim_a.freq(5) # 5 Hz
   
7. 
   
8. p_out = Pin('GP2', mode=Pin.OUT)
   
9. tim_a.irq(trigger=Timer.TIMEOUT, handler=lambda t: p_out.toggle())

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PWM（脉宽调制）

请参阅machine.Pin 和 machine.Timer。

1. from machine import Timer
   
2. 
   
3. # timer 1 in PWM mode and width must be 16 buts
   
4. tim = Timer(1, mode=Timer.PWM, width=16)
   
5. 
   
6. # enable channel A @1KHz with a 50.55% duty cycle
   
7. tim_a = tim.channel(Timer.A, freq=1000, duty_cycle=5055)

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ADC（模数转换）

参见machine.ADCWiPy.

1. from machine import ADC
   
2. 
   
3. adc = ADC()
   
4. apin = adc.channel(pin='GP3')
   
5. apin() # read value, 0-4095

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UART（串行总线）

参见 machine.UART.

1. from machine import UART
   
2. uart = UART(0, baudrate=9600)
   
3. uart.write('hello')
   
4. uart.read(5) # read up to 5 bytes

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SPI总线

请参阅machine.SPI.

1. from machine import SPI
   
2. 
   
3. # configure the SPI master @ 2MHz
   
4. spi = SPI(0, SPI.MASTER, baudrate=200000, polarity=0, phase=0)
   
5. spi.write('hello')
   
6. spi.read(5) # receive 5 bytes on the bus
   
7. rbuf = bytearray(5)
   
8. spi.write_readinto('hello', rbuf) # send and receive 5 bytes

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I2C总线

参见 machine.I2C.

1. from machine import I2C
   
2. # configure the I2C bus
   
3. i2c = I2C(baudrate=100000)
   
4. i2c.scan() # returns list of slave addresses
   
5. i2c.writeto(0x42, 'hello') # send 5 bytes to slave with address 0x42
   
6. i2c.readfrom(0x42, 5) # receive 5 bytes from slave
   
7. i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
   
8. i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to slave 0x42, slave memory 0x10

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看门狗定时器 (WDT)

参见 machine.WDT.

1. from machine import WDT
   
2. 
   
3. # enable the WDT with a timeout of 5s (1s is the minimum)
   
4. wdt = WDT(timeout=5000)
   
5. wdt.feed()

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实时时钟 (RTC)

见机器. machine.RTC

1. from machine import RTC
   
2. 
   
3. rtc = RTC() # init with default time and date
   
4. rtc = RTC(datetime=(2015, 8, 29, 9, 0, 0, 0, None)) # init with a specific time and date
   
5. print(rtc.now())
   
6. 
   
7. def alarm_handler (rtc_o):
   
8.     pass
   
9.     # do some non blocking operations
   
10.     # warning printing on an irq via telnet is not
    
11.     # possible, only via UART
    
12. 
    
13. # create a RTC alarm that expires after 5 seconds
    
14. rtc.alarm(time=5000, repeat=False)
    
15. 
    
16. # enable RTC interrupts
    
17. rtc_i = rtc.irq(trigger=RTC.ALARM0, handler=alarm_handler, wake=machine.SLEEP)
    
18. 
    
19. # go into suspended mode waiting for the RTC alarm to expire and wake us up
    
20. machine.lightsleep()

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SD卡

参见 machine.SD.

1. from machine import SD
   
2. import os
   
3. 
   
4. # clock pin, cmd pin, data0 pin
   
5. sd = SD(pins=('GP10', 'GP11', 'GP15'))
   
6. # or use default ones for the expansion board
   
7. sd = SD()
   
8. os.mount(sd, '/sd')

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无线局域网 (WiFi)

请参阅 network.WLAN和machine.

1. import machine
   
2. from network import WLAN
   
3. 
   
4. # configure the WLAN subsystem in station mode (the default is AP)
   
5. wlan = WLAN(mode=WLAN.STA)
   
6. # go for fixed IP settings
   
7. wlan.ifconfig(config=('192.168.0.107', '255.255.255.0', '192.168.0.1', '8.8.8.8'))
   
8. wlan.scan()     # scan for available networks
   
9. wlan.connect(ssid='mynetwork', auth=(WLAN.WPA2, 'mynetworkkey'))
   
10. while not wlan.isconnected():
    
11.     pass
    
12. print(wlan.ifconfig())
    
13. # enable wake on WLAN
    
14. wlan.irq(trigger=WLAN.ANY_EVENT, wake=machine.SLEEP)
    
15. # go to sleep
    
16. machine.lightsleep()
    
17. # now, connect to the FTP or the Telnet server and the WiPy will wake-up

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Telnet 和 FTP 服务器

看 network.Server

1. from network import Server
   
2. 
   
3. # init with new user, password and seconds timeout
   
4. server = Server(login=('user', 'password'), timeout=60)
   
5. server.timeout(300) # change the timeout
   
6. server.timeout() # get the timeout
   
7. server.isrunning() # check whether the server is running or not

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心跳指示

见wipy.

1. import wipy
   
2. 
   
3. wipy.heartbeat(False)  # disable the heartbeat LED
   
4. wipy.heartbeat(True)   # enable the heartbeat LED
   
5. wipy.heartbeat()       # get the heartbeat state

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