abstract.txt

This example program demonstrates how to use the on-chip Comparators of the Philips LPC767/768/769

This example program demonstrates how to use the on-chip Comparators
of the Philips LPC767/768/769 Devices.  The program configures CMP1 as
a Positive input (P0^4) with internal Vref(1.28V) as Neg input. Also, 
the program configures CMP2 as a Pos input(P0^2)  with CMPREF(P0^5) as
the neg input.
Both comparator outputs (CMP1 P0^6)(CMP2 P0^) are gated to output pins.

1. Build the program (Project-Build Target)
2. Start the Debugger (Debug-Start/Stop Debug Session)
3. Open the Comparator Dialog Box (Peripherals -> Analog Comparator)
6. Run the program while viewing the Comparators dialog.
7. Select View -> Periodic Update to view  operation while running.
8. From the command line, enter CIN1A = x.x, where x.x is any value
   between 0 and 5.0V.  Watch CMP1 toggle with CIN1A above 1.28V.
9. From the command line, enter CMPREF = 2.5V. Enter CIN2A = x.x, where
   x.x is any value from 0V to 5.0V. Watch CMP2 toggle above 2.5V.
 
Both comparators can be programmed to interrupt on a compare shift. The interrupt 
flag must be reset by software.  See the Philips databook for more details.