| ||||
| Home Products Download Events Support | ||||
Technical Support
On-Line Manuals
C251 User's Guide
C251 Introduction Compiling Programs Language Extensions Preprocessor Advanced Programming Error Messages Library Reference 
Appendix A. ANSI C Implementation 
Implementation-defined Behavior Compiler-Related Library-Related B. Version Differences Version 1.0 Differences C51 Version 5 Differences C. Writing Optimum Code Memory Model Variable Location Variable Size Local Variables Use 251 Source Mode Other Sources D. Compiler Limits E. Byte Ordering F. Hints, Tips, and Techniques Tips for Program Execution Tips for the Stack Tips for Interrupts Function Pointers Problems Using printf Uncalled Functions Trouble with bdata Tips for Porting C51 Code Tips for the Intel RISM MonitorTips for Interrupts
To enable an interrupt source you need to set global interrupt enable all (EA) bit in the SFR register IE0. In addition, each individual interrupt source has it is own interrupt enable bit which must be set to 1.
Several interrupt routines with the same interrupt priority can share a common registerbank. However you cannot state using 0, since this registerbank is typically used in the main function.
If you need to disable interrupts for a C statement or a C function you can use the following methods:
- To disable interrupts for a complete C function you can use the #pragma disable compiler directive. Refer to DISABLE for more information.
- You may reset the EA bit in the IE0 SFR register.
| Contact Site Map Press Privacy | Copyright © 2012 ARM Ltd and ARM Germany GmbH. All rights reserved. |
