19-03-2014, 03:00 PM
Interfacing LEDs with LPC2148 ARM
Interfacing LEDs.pdf (Size: 497.93 KB / Downloads: 32)
ARM7 LPC2148 Evaluation Board
The ARM7 LPC2148 Evaluation board is specifically
designed to help students to master the required skills in
the area of embedded systems. The kit is designed in such
way that all the possible features of the microcontroller will
be easily used by the students. The kit supports in system
programming (ISP) which is done through serial port.
NXP’s ARM7 (LPC2148), ARM Evaluation Kit is proposed
to smooth the progress of developing and debugging of
various designs encompassing of High speed 32-bit
Microcontrollers.
LED (Light Emitting Diodes)
Light Emitting Diodes (LED) is the most commonly used
components, usually for displaying pins digital states.
Typical uses of LEDs include alarm devices, timers and
confirmation of user input such as a mouse click or
keystroke.
Interfacing LED with LPC2148
We now want to flash a LED in LPC2148 Evaluation
Board. It works by turning ON a LED & then turning it OFF &
then looping back to START. However the operating speed
of microcontroller is very high so the flashing frequency will
also be very fast to be detected by human eye.
The ARM7 LPC2148 Evaluation board has four numbers
of point LEDs, connected with I/O Port lines (P1.16 – P1.19)
to make port pins high.