TABLE OF CONTENTS This chapter introduces the hardware side of the PIC18Fxx2 by exploring reset behavior and parallel port IO. In addition, the nuances of writing C code for PIC18Fxx2 applications are examined.
After reading this chapter, you will be able to:
Implement a simple PIC18F242 system that has an oscillator, power supply, and reset switch.
Write C code for the PIC18 that implements IO via pushbutton switches and LEDs using a finite state machine approach.
Discuss the different features of the PIC18 parallel ports such as bidirectional capability, weak pullups, and open-drain outputs.
Describe the factors that affect dynamic power consumption in CMOS circuits.
Identify common features of integrated circuit datasheets.
Discuss the use of sleep mode in the PIC18 and its effect on power consumption.
Describe the operation of the watchdog timer and its interaction with sleep mode.
Implement a parallel interface between a PIC18 and a liquid crystal display module.
Previous chapters explored the instruction set of the PIC18 and assembly language programming in the context of C programming. This was done so that the linkage from high-level language constructs such as data types, conditional statements, loop structures, subroutines, signed/unsigned arithmetic, and so forth to assembly language is clear. This understanding is needed, as most programming of microprocessors and microcontrollers is done in a high-level language such as C, not assembly language, and therefore one must be cognizant of the performance and memory usage repercussions when using...
