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Register bits can be acessed as an 8-bit entity (SCC2 = 0x04), or as individual bits (RE = 1). How do I handle interrupts? The CodeWarrior compiler provides a non-ANSI compliant way to specify directly the interrupt vector number in the source: interrupt 17 void TBM_ISR (void){ /* Timebase Module Handler*/ } Vector Number Vector Address Vector Address Size 0 0xFFFE - 0xFFFF 2 1 0xFFFC – 0xFFFD 2 2 0xFFFA – 0xFFFB 2 ... ... com Introduction to CodeWarrior Let’s see how to... com Data types Facts • The greatest savings in code size and execution time can be made by choosing the most appropriate data type for variables.

Com Standard Library Performing Input/Output using the C library functions getchar gets printf putchar puts scanf sprintf sscanf. \n”); while (1); } All input/output performed by C library functions is supported by underlying calls to getchar and putchar. com Some natural Questions... After seeing the previous code, some natural questions may arise: Where is my code? Where are my variables? How do I access I/O Registers? How do I handle interrupts? com Where is my code? In the PRM file, you can define where you want to allocate each segments you have defined in your source code.

Com Const variables The Declaration const is applied to any variable, and it tells the compiler to store it in ROM code. The compiler keeps the program memory address of that location. Since it is in ROM, its value cannot be changed. An initialization value must be declared. com Const constrains • Some compilers create a genuine variable in RAM to hold the const variable. On RAM-limited systems, this can be a significant penalty. • Some compilers, like CodeWarrior, store the variable in ROM. However, the “read only” variable is still treated as a variable and accessed as such, typically using some form of indexed addressing (16-bit).

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