Keil C51 Cross Compiler - gmitWEB

More documents

Recommendations

Info

<strong>C51</strong> Memory Models Select Model Embedded Systems 2 2 - 6 C Programming
<strong>C51</strong> Memory Types • Memory type extensions allow access to all 8051 memory types. – A variable may be assigned to a specific memory space – The memory type may be explicitly declared in a variable declaration • variable_type variable_name; • e.g. int data x; • Program Memory – CODE memory type – Up to 64Kbytes (some or all may be located on 8051 chip) • Data Memory – 8051 derivatives have up to 256 bytes of internal data memory – Lower 128 bytes can be directly or indirectly addressed – Upper 128 bytes shares the same address space as the SFR registers and can only be indirectly addressed – Can be expanded to 64KBytes off-chip Embedded Systems 2 2 - 7 C Programming
Page 1 and 2: Keil C51 Cross Compiler • ANSI C
Page 3 and 4: C51 Keywords Embedded Systems 2 2 -
Page 5: C51 Memory Models • Small - All v
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 and 28: Hardware Delay • Use timer 0 or t
Page 29 and 30: Re-entrant Functions • A re-entra
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

Create successful ePaper yourself

Delete template?

Save as template?