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ST20-SWCSUN

ST20 software development and debugging tools

STMicroelectronics 

ST20–SWC

2 Code building tools

The ST20 ANSI C Toolset provides a complete C cross-development system for the ST20. It can be

used to build single task and multi-tasking programs for the ST20. Programs developed with the

toolset are both source and binary compatible across all host development machines.

The ST20 ANSI C Toolset is available for the following development platforms:

IBM 386/486 PC and compatibles under MSDOS 5 and Windows 3.1, or later versions.

Sun 4 under SunOS 4.1.3 or Solaris 2.4 with X11 Release 4 server or OpenWindows 3, or

later versions.

2.1 How programs are built

The toolset build process is shown diagrammatically in Figure 1.

Figure 1 The tool chain

ANSI C source files may be separately compiled into object files. The compiler and libraries are

described in section 2.2. The librarian may be used to collate object files into libraries. The linker links

object files and libraries into fully resolved linked units.

A configuration description is a text file describing the target hardware and how the software maps

onto it. The configurer converts the configuration description file into a configuration binary file. The

collector removes any debugging information, and uses the configuration binary to collect the linked

files with bootstrap code to make an executable file called a bootable file.

During development and for hosted systems, the bootable file may be loaded down a hardware serial

link onto the target hardware using the application loader. For stand-alone systems, the bootable file

may be converted, using the EPROM tool, to an industry standard EPROM format for programming

EPROMs.

In addition to loading programs down a hardware serial link, the application loader program provides

access to host operating system facilities through a remote procedure call mechanism. This method

is used to support the full ANSI C run-time library.

A memory configurer tool is supplied for describing a ST20450 memory configuration. This data is

used to initialize the memory interface of the ST20450. The memory interface can be initialized either

using the hardware serial link or from ROM.

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