Plzz gave a embedded c code to interface ultrasonic range finder hc sr04 with lpc2148

interface lpc 2148 with hc sr04

The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats or dolphins do. It offers excellent range accuracy and stable readings in an easy-to-use package. It operation is not affected by sunlight or black material like Sharp rangefinders are (although acoustically soft materials like cloth can be difficult to detect). Similar in performance to the SRF005 but with the low-price of a Sharp infrared sensor.

Power Supply :5V DC
Quiescent Current : <2mA
Effectual Angle: <15°
Ranging Distance : 2cm – 500 cm/1" - 16ft
Resolution : 0.3 cm

Application:

• Applications ranging occasions;
• measuring the distance between objects:
• Programmable car obstacle avoidance:
• robot obstacle avoidance:
• teaching apparatus;
• security, industrial control