Datasheet

Differences

Code size improvements and improved optimization

ADS 1.1 optimization improvements have improved code density for compiled code

over ADS 1.0.1. A number of additional optimizations have been introduced. In

particular the compilers now reorder top-level data items when this will save space. For

example, if the following global variables are defined:

char a = 0x11;

short b = 0x2222;

char c = 0x33;

int d = 0x44444444;

the ADS 1.1 compilers optimizes the order and stores them in memory as:

char a;

char c;

short b;

int d;

Impact

You cannot rely on the order of global variables in memory being the same as the order

in which they are declared. If, for example, you have used a sequence of volatile global

variables to map peripheral registers, you must rewrite your code to use structures. Use

the

-Ono_data_reorder

compiler option to disable this optimization.

Extensions to RDI support

AXD supports the following extensions to RDI 1.5.1:

• real-time extensions, required for RealMonitor (RDI 1.5.1rt)

• trace extensions required for Trace support (RDI 1.5.1tx)

• self-describing module extensions, required to support self-describing targets

(RDI 1.5.1sdm).

Support for RealMonitor

RealMonitor is the ARM real-time debug solution. AXD has been enhanced to provide

support for RealMonitor. AXD can now connect to a running target without halting the

processor. RealMonitor requires the real-time extensions to RDI 1.5.1. In addition, the

Gateway DLL now supports RealMonitor.

Support for self-describing modules

Self-describing modules are an extension to RDI 1.5.1 that enable a target to describe

its capabilities and requirements to a debugger that supports RDI 1.5.1sdm. AXD

supports RDI 1.5.1sdm, and can modify its interface to suit the target to which it is