Quick reference for the WiPy¶

import pyb

help(pyb) # display all members from the pyb module
pyb.delay(50) # wait 50 milliseconds
pyb.millis() # number of milliseconds since boot-up
pyb.freq() # get the CPU frequency
pyb.unique_id() # return the 6-byte unique id of the board (the WiPy's MAC address)

from pyb import Pin

# initialize GP2 in gpio mode (af=0) and make it an output
p_out = Pin('GP2', mode=Pin.OUT)
p_out.value(1)
p_out.value(0)
p_out.toggle()
p_out(True)

# make GP1 an input with the pull-up enabled
p_in = Pin('GP1', mode=Pin.IN, pull = Pin.PULL_UP)
p_in() # get value, 0 or 1

from pyb import Timer
from pyb import Pin

tim = Timer(1, mode=Timer.PERIODIC)
tim_a = tim.channel(Timer.A, freq=1000)
tim_a.time() # get the value in microseconds
tim_a.freq(1) # 1 Hz

p_out = Pin('GP2', af=0, mode=Pin.OUT)
tim_a.callback(handler=lambda t: p_out.toggle())

from pyb import Timer
from pyb import Pin

# assign GP25 to alternate function 5 (PWM)
p_out = Pin('GP25', af=9, type=Pin.STD)

# timer 2 in PWM mode and width must be 16 buts
tim = Timer(2, mode=Timer.PWM, width=16)

# enable channel A @1KHz with a 50% duty cycle
tim_a = tim.channel(Timer.A, freq=1000, duty_cycle=50)

from pyb import ADC

adc = ADC()
apin = adc.channel(pin='GP3')
apin() # read value, 0-4095

from pyb import Pin, UART
uart = UART(0, 9600)
uart.write('hello')
uart.read(5) # read up to 5 bytes

from pyb SPI

# configure the SPI master @ 2MHz
spi = SPI(0, SPI.MASTER, baudrate=200000, polarity=0, phase=0)
spi.write('hello')
spi.read(5) # receive 5 bytes on the bus
rbuf = bytearray(5)
spi.write_readinto('hello', rbuf) # send a receive 5 bytes

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

from pyb import WDT

# enable the WDT with a timeout of 5s (1s is the minimum)
wdt = WDT(timeout=5000)
wdt.feed()

from pyb import RTC, Sleep

rtc = pyb.RTC()
rtc.datetime((2014, 5, 1, 4, 13, 0, 0, 0))
print(rtc.datetime())

def some_handler (rtc_obj):
    # trigger the callback again in 30s
    rtc_obj.callback(value=30000, handler=some_handler)

# create a RTC alarm that expires in 30s
rtc.callback(value=30000, handler=some_handler, wake_from=Sleep.SUSPENDED)

# go into suspended mode waiting for the RTC alarm to expire and wake us up
Sleep.suspend()

from pyb import SD
import os

# SD card pins need special configuration so we pass them to the constructor
# clock pin, cmd pin, data0 pin
sd = SD(pins=('GP10', 'GP11', 'GP15'))
os.mount(sd, '/sd')

from network import WLAN
from pyb import Sleep

# configure the WLAN subsystem in station mode (the default is AP)
wifi = WLAN(WLAN.STA)
# go for fixed IP settings
wifi.ifconfig(('192.168.0.107', '255.255.255.0', '192.168.0.1', '8.8.8.8'))
wifi.scan()     # scan for available netrworks
wifi.connect(ssid='mynetwork', security=2, key='mynetworkkey')
while not wifi.isconnected():
    pass
print(wifi.ifconfig())
# enable wake on WLAN
wifi.callback(wake_from=Sleep.SUSPENDED)
# go to sleep
Sleep.suspend()
# now, connect to the FTP or the Telnet server and the WiPy will wake-up

from pyb import Sleep

Sleep.idle()        # lowest sleep mode (~12mA), any interrupts wakes it up
Sleep.suspend()     # everything except for WLAN is powered down (~950uA)
                    # wakes from Pin, RTC or WLAN

Sleep.hibernate()   # deepest sleep mode, MCU starts from reset. Wakes from Pin and RTC.

from pyb import HeartBeat

# disable the heart beat indication (you are free to use this LED connected to GP25)
HeartBeat().disable()
# enable the heart beat again
HeartBeat().enable()