TAILIEUCHUNG - HandBooks Professional Java-C-Scrip-SQL part 192

Tham khảo tài liệu 'handbooks professional java-c-scrip-sql part 192', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | program to fall back on the work just gets easier and easier or at least more similar to ordinary computer programming. Up to this point in the book we have been building the infrastructure for embedded programming. But the topics we re going to talk about in the remaining chapters concern higher-level structures memory tests device drivers operating systems and actually useful programs. These are pieces of software you ve probably seen before on other computer systems projects. However there will still be some new twists related to the embedded programming environment. 1 The toggleLed function wouldn t have required a single line of assembly code if the P2LTCH register had been memory-mapped. 2 This situation gets even more complicated if you consider the various memory models provided by some processors. All of the examples in this book assume that the 80188 s large memory model is used. In this memory model all of the specifics I m about to tell you hold for all pointer types. But in the other memory models the format of the address stored in a pointer differs depending upon the type of code or data pointed to 3 A few processors actually have the first few instructions of the ISR stored there rather than a pointer to the routine. 4 In order to make the example in Chapter 2 a little easier to understand I didn t show any of the initialization code there. However it is necessary to get the hardware initialization code working before you can write even simple programs like Blinking LED. Chapter 6. Memory Types of Memory Memory Testing Validating Memory Contents Working with Flash Memory Tyrell If we give them a past we create a cushion for their emotions and consequently we can control them better. Deckard Memories. You re talking about memories. the movie Blade Runner In this chapter you will learn everything you need to know about memory in embedded systems. In particular you will learn about the types of memory you are likely to encounter how to

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