Keil C51 Cross Compiler - gmitWEB

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<strong>C51</strong> Functions • Can specify – Register bank used – Memory Model – Function as an interrupt – Re-entrancy • [return_type] func_name([args]) [model] [re-entrant] [interrupt n] [using n] int square(int x) { return(x * x); } Embedded Systems 2 2 - 28 C Programming
Re-entrant Functions • A re-entrant function is a function that can be called while it is still running. – e.g. an interrupt occurs while the function is running and the service routine calls the same function. • <strong>Keil</strong> compiler supports re-entrant functions. – Beware of stack limitations Embedded Systems 2 2 - 29 C Programming
Page 1 and 2: Keil C51 Cross Compiler • ANSI C
Page 3 and 4: C51 Keywords Embedded Systems 2 2 -
Page 5 and 6: C51 Memory Models • Small - All v
Page 7 and 8: C51 Memory Types • Memory type ex
Page 9 and 10: C51 Memory Types • bdata - Bit ad
Page 11 and 12: Example Code (1) sbit input = P1^0;
Page 13 and 14: Wait Loops • In some applications
Page 15 and 16: C Bitwise Operators • NOT ~ char
Page 17 and 18: C Logical Operators • Bitwise ope
Page 19 and 20: Accessing Port Pins • Writing to
Page 21 and 22: Example Code (3) //Program to read
Page 23 and 24: Example Code (4) //program to flash
Page 25 and 26: Software Delay • Use a for loop -
Page 27: Hardware Delay • Use timer 0 or t
Page 31 and 32: Function Parameter Passing • Up t
Page 33 and 34: Interrupt Functions • Interrupt v
Page 35: C51 Pointers • Generic pointers -

Keil C51 Cross Compiler - gmitWEB

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