docs/psoc6: Neopixel documentation.

Signed-off-by: IFX-Anusha <Anusha.TR@infineon.com>

docs/psoc6/quickref.rst

@@ -48,13 +48,40 @@ The :mod:`machine` module::
 
     from machine import bitstream
     
-    timing = [1000, 7000, 5000, 2500]          #timing (high_time_0, low_time_0, high_time_1, low_time_1)in ns
-    buf = bytearray([0xAB])                    #buffer data 
+    timing = [1000, 7000, 5000, 2500]          # timing (high_time_0, low_time_0, high_time_1, low_time_1)in ns
+    buf = bytearray([0xAB])                    # buffer data 
     bitstream('P13_6', 0, timing, buf)         # bitstrem buffer data with timing through pin P13_6
 
 .. note::
+    Bitstream is set for the CPU frequency of 100MHz. At other clock frequencies, the timing will not fit.
     All timings greater than 1500 ns work and the accuracy of the timing is +/- 400 ns. 
-    Supported timing_ns ranges below 1500 ns is [500, 1125, 800, 750].
+    Supported timing_ns ranges below 1500 ns are [500, 1125, 800, 750], [400, 850, 800, 450], [300, 900, 600, 600] and [800, 1700, 1600, 900].
+
+Neopixel driver
+---------------
+
+Neopixel library is supported in this port. The library can be installed using mip. 
+
+::
+
+    import mip
+    mip.install('neopixel')
+
+neopixel driver can be used as follows. see the :mod:`neopixel` for more details. 
+
+::
+
+    import neopixel
+    from machine import Pin
+    p0 = Pin('P9_1', Pin.OUT, value=0) # set P9_1 to output to drive NeoPixels
+    np = neopixel.NeoPixel(p0,8,bpp=3) # create NeoPixel object on pin P9_1 with 8 pixels and 3 bytes per pixel with default timing=1
+    np[0] = (255, 255, 255)            # set the first pixel to white
+    np.write()                         # write data to all pixels
+
+.. note::
+   - The timing parameter can be used in the Neopixel constructor as timing tuples supported by bitstream() function. The timing parameter is optional and by default set to 1 which is the default timing [400, 850, 800, 450] for WS2812B LEDs at 800kHz. 
+   - Use timing = 0 for  WS2812B LEDs at 400kHz ie, [800, 1700, 1600, 900].
+   - Use timing = [300, 900, 600, 600] for SK612 LEDs. 
 
 Delay and timing
 ----------------