Step 4: Programming the IO
To begin a new program, you should CLEAR the previous one. You can do this with either the button or by typing clear.
For the ARMweb type the following program in the console window.
' enable pin P0(7) is connected to the LED
WHILE X<30
IO(7) = X AND 1 ' drive pin 7 high when x is odd, low when x is even
X=X+1
WAIT(500)
LOOP
For the DINkit type the following program in the console window.
' enable pin P0(15) is connected to the LED
WHILE X<30
IO(15) = X AND 1 ' drive pin 15 high when x is odd, low when x is even
X=X+1
WAIT(500)
LOOP
For the ARMweb and DINkit to drive the port 1 pins. On all versions ARMweb and DINkit, you can use the following
#include <LPC21xx.bas>
FIO1DIR = FIO1DIR OR (1<<16) ' enable
the pin as an output
WHILE
X<30
P1(16) = X and
1
X=X+1
WAIT(500)
LOOP
Use the following if you have firmware 7.52 or later (includes floating point support)
' port 1 starts at 32
WHILE
X<30
IO(32+16) = X and
1
X=X+1
WAIT(500)
LOOP
The LED on the PCB should pulse 15 times.
To stop a
running program simply press the Stop button.