docs/pyboard/quickref: Add info for Switch, RTC, CAN, Accel classes.

docs/pyboard/quickref.rst

@@ -39,18 +39,33 @@ Use the :mod:`time <utime>` module::
     start = time.ticks_ms() # get value of millisecond counter
     delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
 
-LEDs
-----
+Internal LEDs
+-------------
 
 See :ref:`pyb.LED <pyb.LED>`. ::
 
     from pyb import LED
 
-    led = LED(1) # red led
+    led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
     led.toggle()
     led.on()
     led.off()
     
+    # LEDs 3 and 4 support PWM intensity (0-255)
+    LED(4).intensity()    # get intensity
+    LED(4).intensity(128) # set intensity to half
+
+Internal switch
+---------------
+
+See :ref:`pyb.Switch <pyb.Switch>`. ::
+
+    from pyb import Switch
+
+    sw = Switch()
+    sw.value() # returns True or False
+    sw.callback(lambda: pyb.LED(1).toggle())
+
 Pins and GPIO
 -------------
 
@@ -99,6 +114,17 @@ See :ref:`pyb.Timer <pyb.Timer>`. ::
     tim.freq(0.5) # 0.5 Hz
     tim.callback(lambda t: pyb.LED(1).toggle())
 
+RTC (real time clock)
+---------------------
+
+See :ref:`pyb.RTC <pyb.RTC>` ::
+
+    from pyb import RTC
+
+    rtc = RTC()
+    rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
+    rtc.datetime() # get date and time
+
 PWM (pulse width modulation)
 ----------------------------
 
@@ -167,3 +193,25 @@ See :ref:`pyb.I2C <pyb.I2C>`. ::
     i2c.recv(5, 0x42) # receive 5 bytes from slave
     i2c.mem_read(2, 0x42, 0x10) # read 2 bytes from slave 0x42, slave memory 0x10
     i2c.mem_write('xy', 0x42, 0x10) # write 2 bytes to slave 0x42, slave memory 0x10
+
+CAN bus (controller area network)
+---------------------------------
+
+See :ref:`pyb.CAN <pyb.CAN>`. ::
+
+    from pyb import CAN
+
+    can = CAN(1, CAN.LOOPBACK)
+    can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
+    can.send('message!', 123)   # send a message with id 123
+    can.recv(0)                 # receive message on FIFO 0
+
+Internal accelerometer
+----------------------
+
+See :ref:`pyb.Accel <pyb.Accel>`. ::
+
+    from pyb import Accel
+
+    accel = Accel()
+    print(accel.x(), accel.y(), accel.z(), accel.tilt())