API.md

@@ -2,13 +2,27 @@
 
 ## ulisp-seesaw implemented API
 
-seesawGPIODirection.lisp - Set direction and pullup/down mode of a pin. example: (seesawGPIODirection 'PA10 'InputPullUp).
-
-seesawI2CAddr.lisp - All installations require this to configure the chip I2C addrs
-
-seesawReset.lisp - Software reset the seesaw chip - (seesawReset) does what you'd expect it to do.
-
-seesawPWM.lisp - Set a pin to output a PWM signal - (seesawPWM 'PA04 #x7f) would set an adafruit backlight to half brightness
+seesawGPIODirection.lisp - Set direction and pullup/down mode of a pin. Example:
+<pre>
+(seesawGPIODirection 'PA10 'InputPullUp)
+</pre>
+
+seesawGPIORead.lisp - Reads a bit from GPIO.  Note, you should set the pin direction to input, before reading.  Example:
+<pre>
+(seesawGPIORead 'PA10)
+</pre>
+
+seesawI2CAddr.lisp - All installations require this variable to be defined to configure the chip I2C addrs
+
+seesawReset.lisp - Software reset the seesaw chip.  Example:
+<pre>
+(seesawReset)
+</pre>
+
+seesawPWM.lisp - Set a pin to output a PWM signal.  Example, to set an Adafruit (tm) TFTv2 backlight to half brightness:
+<pre>
+(seesawPWM 'PA04 #x7f)
+</pre>
 
 ## CircuitPython seesaw API