EE3376 – Embedded Systems - Spring 2006 - Exam 2 – MacDonald – Page 1
Student Name:______________________________ Student ID: _______________
Problem 1
A multi purpose sensor is connected to the HCS12 through an SCI port and
repeatedly (1 time every 5 seconds) sends two bytes of data to the microprocessor:
1) temperature (unsigned byte), and 2) humidity (unsigned byte).
Write a polling subroutine that will wait for each byte to arrive and store the values
in locations $2000 and $2001 respectively.
Assume the circuit is initialized and is working correctly to interface with the sensor
(i.e. correct baud rate, parity, etc.).
