Designing Embedded Systems with PIC Microcontrollers

CHAPTER 14 Introducing C

In recent chapters we have developed increasingly complicated programs; in doing this, it has become more and more difficult to apply Assembler programming. It was difficult to manage the complexity of the program, program errors were hard to find, program flow was difficult to control and even quite simple mathematical tasks (like the scaling in the light meter program) were laborious to implement.

The alternative is to change the programming strategy. Figure 4.1 showed the programmer's dilemma, and three alternative approaches were described. We initially adopted the third of these approaches, Assembler, as it represented a way of writing programs which very directly controlled the system hardware. Because of the ...