Introduction: Switch Interface With LPC2148
In this article we will learn how to interface the switch to the LPC2148 microcontroller board.We will see the output by adding a led to the LPC2148 board.
Step 1: LP2148 Program for Switch Interface
Connect the a Switch at port 1.16 and LED to the port 0.10 . Connect the a Pull up resistor to the pin Port 0.16.
Step 2: Program:
IO1DIR = ~(0x00010000); //configure the input port at port 1.16
IO0DIR =(0x00000400); //configure the output port at port 0.10
if(IO1PIN & (0x00010000)) //condition for open circuit
IO0CLR = (0x00000400); //turn off the led that is at port 0.10
IO0SET= (0x00000400); //turn on the led that is at port 0.10